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  • Phytoplankton  (37)
  • Geodesy
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (38)
  • Springer  (4)
  • 2005-2009  (42)
  • 1950-1954
  • 2008  (39)
  • 2006  (3)
  • 1
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    Fitoplancton en el afloramiento de las Islas Galápagos, durante Agosto 2000 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Esta investigación es parte del Proyecto Indicadores Biológicos de diferentes ecosistemas marinos del Ecuador, correspondiente a la región Insular de Galápagos durante agosto 2000, con el propósito de comprender la dinámica poblacional del fitoplancton (cuali-cuantitativo) de las diferentes masas de agua que afloran al este y oeste de Galápagos y entre las islas enfocando áreas de mayor fertilidad marina en la época seca.
    Description: This study corresponds to the cruise around the Galapagos Islands carried out by the Oceanographic Institute of the Ecuadorian Navy in August 2000. The purpose was to understand, quantitatively and qualitatively, the ecological dynamics of the phytoplankton during the dry season. The chlorophyll "a" data from surface waters registered high concentrations (0.87 - 2.18 mg/m3) southwest off the Galapagos Islands, reflecting upwelling processes. Sub-surface-water values were higher southward, while the lowest values were found to the north. Nuclei of high chlorophyll "a" content were found to the southwest of the Galapagos (10 m), and to the southeast (40-50 m). The cellular biomass was represented by P. delicatissima, species responsible for the high fertility in the center of the upwelling area and to the southwest and south off the Galapagos, Thalassiosira subtilis and Gymnodinium sp. were dominant to the east. The incidence of the Cromwell Current was accented toward 91° and 92°W; toward 89°W different conditions were shown, probably associated to the influence of the Humboldt Current. The biomass in 55µm mesh size fraction was dominated by P. delicatissima (0 m); P. delicatissima, C. compresus and C. curvisetus ( 0 - 50 m). C. tripos and G. polyedra, warm water species dominated to the north off the Galapagos in surface waters, while in sub-surface waters these species dominated to the southeast. This atypical behaviour was observed during the cruise of May 2000, when upwelling conditions were not evident.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Phytoplankton ; Biomass ; Chlorophylls ; Marine ecology ; Population dynamics ; Phytoplankton ; Chlorophylls ; Biomass ; Upwelling ; Marine ecology ; Water masses ; Population dynamics ; Cruises ; Oceanic islands
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  • 2
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    Condiciones del plancton en una estación fija: Puerto El Morro-Playas, Golfo de Guayaquil, 2000-2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En este estudio se examina la abundancia estructura poblacional y variación temporal del plancton, especialmente de copépodos en el Golfo de Guayaquil, a través de tres años de estudio, en condición no El Niño.
    Description: Changes on some oceanographic conditions as well surface planktonic community structure were studied during 33 months (December 1999- August 2002) at a fixed station in the Gulf of Guayaquil. Copepods, ostacods and decapod larvae were the most abundant zooplankton (300 µ mesh size) taxa, followed by fish larvae, chaetognaths, medusae, and mysidaceans. The lower abundance taxa were fish eggs, polychaeths, amphipods, pteropods, lamellibranch, cirriped larvae, and gasteropods. Phytoplankton was dominated by diatoms. The effect of the oceanographic variability on the zooplanktonic distribution, abundance, and population dynamics is unknown due to lack of appropriate continuity on sampling and analyses. The two most abundant copepod species were identified. Acartia danae dominated on the dry season, and Labidocera lubbocckii on the rainy season. Although, in general, copepod abundance was high, this diminished during the rainy seasons of 2000 (138-199 org/m3) and 2002 (175-327 org./m3), with relation to 2001 (1235-2238 org/m3). In march and april it was (6785 y 19887 org./m3). Ostracods, mainly Conchoecia sp., were relatively abundant (compared to copepods) and they were sometimes present in higher numbers. Decapods larvae were more abundand during the rainy season, specially in 2002. High abundance of copepods was find to be associated to lower water temperature, and decapod larvae, to higher temperatures. Diatoms were the main components of the phytoplankton community, with dominance of Skeletonema costatum, Coscinodiscus excentricus y Thalassiotrix frauenfeldii.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Population structure ; Plankton ; Phytoplankton ; Distribution ; Zooplankton ; Diatoms ; Fish larvae ; Plankton ; Phytoplankton ; Abundance ; Distribution ; Zooplankton ; Marine crustaceans ; Fixed stations ; Population structure ; Diatoms ; Fish eggs ; Fish larvae
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  • 3
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    Diversidad del plancton en el estuario interior de Puerto Bolívar, Ecuador durante julio de 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Los objetivos del presente estudio son:- Establecer el estado actual del plancton en el estero Santa Rosa, estero Jambelí y río Jubones durante las fases de flujo y reflujo. - Determinar la productividad, dominación y diversidad del plancton presentes en el área de estudio.
    Description: During the study was colected samples water on superficial at 27 stations, it was distributed in the Port Bolívar stuary with maing goal it to know primary productivity. the samples of plankton was colected in two phases: flux and reflux during the days 3 to 18 of july-2002. The diversity phytoplankton was identified to method Uthermohl 88 species in the lawyer superficial and 96 species were determined in samples net of 50u. In the phytoplankton community the diatoms were dominant and lower concentration the dinoflagellates, silicoflagellates, cyanobacter and cocolithophorides. In cell count the species the most dominant at the area were Skeletonema costatum and Pseudonitzschia delicatissima, in the net (50u) samples were registered the stuarine and benthic species: Skeletonema costatum, Cyclotella menenghiniana. It was destacated that the most phytoplankton diversity found in the areas river Jubones and the Santa Rosa stuary during the phase flux. The zooplankton community was registered hight diversity of groups zooplanktonic with a total of 32 and 28 taxa during flux and reflux respectivetly and terms of diversity max was registered a 2.19 bits found in the estero Jambelí. The high biomas of zooplankton it was observed during reflux in the station 14 and the lower biomas. It was found during flux in the station 5 localited in the estero Santa Rosa. The ichthyoplankton was registered low abundance of eggs and lavals of fish in the study area, and determinated. The number max of diversity were 0.8 bits observed in the area Punta Jambelí and determinated in the group of eggs of fish the following familys: Clupeidae, Sciaenidae, Engraulidae and the larval of fishes the dominant family was Engraulidae.
    Description: Incluye ref. bil., grafs.
    Description: Published
    Keywords: Biological production ; Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Species diversity ; Species diversity ; Biological production ; Plankton ; Phytoplankton ; Zooplankton ; Biomass
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  • 4
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    Abundancia y distribución del ictioplancton, fito y zooplancton en el mar ecuatoriano en abril de 1995 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo trata de la distribución de la abundancia de huevos y larvas de peces en relación con la abundancia del zooplancton y fitoplancton colectado en 13 estaciones muestreadas a bordo del B/I TOHALLI durante el crucero pelágico-oceanográfico realizado en abril de 1995. Se analizó un total de 12820 huevos de peces. (10m²)¹ y 5145 larvas de peces (10m²)¹. La mayor abundancia de huevos y larvas de peces se localizó al este de las Islas Galápagos, en las estaciones 1P y 10, situadas en los extremos norte y sur del área de muestreo a la altura de la Isla San Cristóbal, con 5226 huevos (10m²)¹ y 1042 larvas (10m²)¹, respectivamente, mientras que la menor abundancia se localizó también al este de la Islas Galápagos, en las estaciones 7 y 5 con 109 huevos (10m²)¹ y 87 larvas (10m²)¹, respectivamente, y en las estaciones localizadas en el meridiano 83° W, frente a las provincias del Guayas y Manabí, con menos de 100 larvas (10m²)¹. Se reporta la presencia de larvas de Sardinops sagax en las estaciones cercanas a la Isla San Cristóbal. Huevos de Scomber japonicus y de engráulidos se identificaron cerca de esta isla. La familia ENGRAULIDAE se ausentó en el meridiano 83° W. Se identificaron larvas de peces pertenecientes a 17 familias, de las cuales, la familia MYCTOPHIDAE y GONOSTOMATIDAE fueron las más abundantes, representaron el 39% y 22% del total de larvas, respectivamente. Las áreas de abundancia de huevos y larvas estuvieron relacionadas con áreas de riqueza fito y zooplanctónica. Las mayores concentraciones de fitoplancton en aguas superficiales, más de 170000 células.m³, se dieron al este de Galápagos. Las menos concentraciones de fitoplancton se dieron en cambio a la altura del Golfo de Guayaquil, con 5000 células m³, lugar donde prosperó el zooplancton tanto en superficie como en profundidad, con 1800 y 2800 organismos.m³, respectivamente. Siguió en abundancia de zooplancton la zona norte de la Isla San Cristóbal tanto en superficie como en aguas profundas.
    Description: Incluye ref.bibl.,ilus.
    Description: Published
    Keywords: Phytoplankton ; Zooplankton ; Fish larvae ; Abundance ; Ichthyoplankton ; Phytoplankton ; Zooplankton ; Cruises ; Fish eggs ; Fish larvae
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  • 5
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    Aspectos ecológicos del plancton en las riberas del humedal Isla Santay, Río Guayas durante los años 2000 y 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del presente estudio es conocer la distribución cualitativa y cuantitativa de las especies del fitoplancton, zooplancton e ictioplancton y su relación con las condiciones ambientales durante el período en estudio.
    Description: The present work includes/understands the study of the qualitative and quantitative temporary variability of the phytoplankton, zooplankton and ichthyoplankton in the shores of the Santay Island, of the Province of the Guayas. For the effect 16 samples, obtained during november of the 2000 and january of the 2002 were analyzed. 38 species of phytoplankton in water samples and 51 species in network samples were identified (50u). The diatoms were dominant and in smaller concentration the dinoflagellates ones, cianobacterys, silicoflagellates, and tintinides. The cellular biomass was represented mainly by Skeletonema costatum, Paralia sulcata and Coscinodiscus excentricus, species that were abundant in the study area. In network samples species were observed estuarys and benthicas: Actinoptychus senarius, Coscinodiscus excentricus, C. concinnus, Polymixus coronalis, Cyclotella menenghiniana, characteristic of a high fertility. During year 2000 a smaller zooplanctónica biomass with a variability in the abundance of the main groups of zooplancton appeared, standing out the dominant group the Larvae of Fish and represented by the sort Anchovy sp. and its temporary abundance is influenced mainly by the seasonal time, physical factors and states of tides. Wheres during year 2002 a greater zooplanctónica biomass was observed and greater diversity of species, this biomass was represented mainly by microcrustaceans such as Nauplios of cirripedios, Copépodos, Zoeas of brachiuras, Copépodos, Larvae of fish and Larvae of poliquetos, in comparison with year 2000. The abundance of a fraction of some groups of zooplankton pertaining to meroplancton is an index that mainly characterizes productive areas by the presence of larval estadíos of crustaceans and fish.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Biological production ; Species diversity ; Marine ecology ; Species diversity ; Plankton ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Biomass ; Abundance ; Biological production ; Marine ecology ; Temporal variations
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  • 6
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    Mareas rojas durante 1989-1999, en aguas ecuatorianas (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En el presente artículo se va a referir principalmente a los eventos de Marea Roja (MR) registrados entre 1989-1999 (Fig. 1y2).
    Description: Some Red Tides were reported during the last decade (1989-1999) in Ecuadorian waters, these observed during coastal monitorings and cruises oceanographic, and they migth have a relationship to coastal oceanographic aspects. The Red Tides are of world occurrence, in Ecuador they appeared with high frequency in the Gulf of Guayaquil (Canal de Jambelí, Estero Salado, Puná Island and Río Guayas), but they have been also evidenced to the south of the Peninsula Santa Elena, Manglaralto, Manta, Cojimíes and in the Galapagos Islands. Their highest occurrence was in February and March, another one in April, June, September and November. During El Niño event, the marine fertility decreases when warm water masses arrive with a low dominance of dinoflagellates. This organisms can caused red tide especially in the Gulf of Guayaquil. Red tide events were caused specially by the dinoflagellates and ciliates their species have been Cochlodinium catenatum, Cochlodinium sp., Gymnodinium splendens, Gonyaulax monilata, Gonyaulax spp., Gymnodinium spp., Gyrodinium striatum, Noctiluca scentillans, Prorocentrum sp., Prorocentrum maximun, Scrippsiella trochoidea, Ceratium gibberum, Ceratium deflexum, Mesodinium rubrum, giving discoloraciones yellowish and reddish coffee; but there has also been diatomeas with yellow staions - greenish as Skeletonema costatum, Coscinodiscus sp., Chaetoceros affinis, C. curvisetus; and due to whitish to masses of jellyfishs.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Phytoplankton ; Public health ; Red tides ; Phytoplankton ; Public health
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  • 7
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    Los dinoflagelados como indicadores de "El Niño" en el mar ecuatoriano (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En el presente trabajo se determina la distribución de los dinoflagelados por medio de un análisis cualitativo y de abundancia relativa, calculándose además de su diversidad. Se considera especies de dinoflagelados, indicadoras de los avances hacia el sur del agua cálida ecuatorial y de baja salinidad que apareció frente a las costas de Ecuador en Diciembre de 1972, año conocido como de "El Niño". Los resultados se relacionan con algunas condiciones hidrográficas coincidentes con la predominancia de los dinoflagelados. Así mismo se compara y se discuten estos antecedentes con la información disponible en relación a la presencia de otros organismos planctónicos típicos de aguas ecuatoriales y que también aparecieron durante Diciembre de 1972 en el mar ecuatoriano.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Description: Dinoflagelados, Fitomastigóforos
    Keywords: Distribution ; Phytoplankton ; Distribution ; Phytoplankton
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  • 8
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    Estudio de la comunidad fitoplanctónica en el estuario interior de Esmeraldas, Ecuador durante mayo de 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo tiene por finalidad determinar la composición, abundancia y distribution de las especies que se encuentran en los ríos de la ciudad de Esmeraldas.
    Description: The present investigation comprehended, three kinds of method: Chlorophyll a, cell count, cualitative analysis. That to contributed with ecology information about of phytoplankton community. These information were carry out in five area that included 31 stations in the internal stuary of the Esmeraldas city during on may of 2002. In the water example was identify 51 species and 87 species was observed in net 50 u. In the community of phytoplankton. The diatoms was dominant and the low concentration the dinoflagellates, cianobacters, clorophyta, euglenophyta and tintinnoids. In count cells was observed the dominant of Mesodinium rubrum and Thalassiosira subtilis in all area. However in examples of net (50u) was registered species typical of estuary environmental Chaetoceros affinis, Skeletonema costatum, Bacteriastrum elongatum, Pseudo-nitzschia paradoxa and reported the high abundance and diversity. These species presented a broad distribution and were dominan tipical of area.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Phytoplankton ; Estuaries ; Distribution ; Chlorophylls ; Diatoms ; Species diversity ; Chlorophylls ; Phytoplankton ; Abundance ; Diatoms ; Species diversity ; Cell counters ; Estuaries ; Community composition ; Distribution
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  • 9
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    Composición y distribución de la biomasa del plancton en el frente ecuatorial (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este trabajo presenta los resultados de la distribución de la biomasa y composición del fitoplancton y zooplancton en el frente ecuatorial, cuya presencia caracteriza las condiciones consideradas como "normal" para el sistema de circulación oceánica del Pacífico Tropical.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Distribution ; Biomass ; Phytoplankton ; Zooplankton ; Composition ; Distribution ; Biomass ; Cruises ; Phytoplankton ; Zooplankton
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  • 10
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    Determinación del datum vertical en La Libertad, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Normalmente en los levantamientos geodésicos se utilizan dos tipos de referencias: las coordenadas de origen y el datum vertical: Las primeras están en función del elipsoide o superficie matemática de referencia que más se ajusta al área, y el segundo; por la determinación del nivel medio del mar con 19 años de observación. El Ecuador tiene como elipsoide de referencia, el Internacional y el datum horizontal del punto localizado en la Canoa, Venezuela (Provisional South American Datum 1956, PSAD 56), cuya coordenadas han sido transportadas a nuestro país mediante redes geodésicas. En 1948, el Ecuador instaló una estación mareográfica en la Libertad (Lat. 020° 12'S., Long. 80° 55'W) y a la determinación del datum vertical se refiere el presente trabajo.
    Description: Incl. ref.bibl., grafs.
    Description: Published
    Keywords: Geodesy ; Datum levels ; Geodesy
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  • 11
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    Distribución cuali-cuantitativa del fitoplancton en el Pacífico sureste (3°16'-31°23'S), durante El Niño 1997-1998 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del presente artículo es estudiar la distribución de las concentraciones de clorofila "a" y feopigmentos en diciembre/97 y marzo/98, y cuales serían los indicadores biológicos del fitoplancton que han avanzado con la corriente cálida hacia el sur en diciembre/97, en condiciones de El Niño 97-98, en el Pacífico sudeste exceptuando la región peruana (Fig.1).
    Description: During the VII Ecuadorian Expedition to Antarctic in the Guayaquil - Valparaíso - Guayaquil route (december/97 - march/98), oceanographic stations were performing to register cuali-cuantitative variations of phytoplankton of Southeastern Pacific Ocean during "El Nino" 1997-98 conditions. The biomass of phytoplankton is measured chlorophylls "a" levels showed lower concentrations between 0.015-04 mg/m³ to the 100m depth. The phytoplankton composition in december/97, registered the most dominance of diatoms at southward Gulf of Guayaquil with lower concentration at 20° S, the main species were Chaetoceros affinis, Skeletonema costatum, Rhizosolenia imbricata, Ch, leavis, R. alata var curvirrostris, Climacodium biconcavum, R. styliformis. The dinoflagellates species had the widest distribution in the area studied (3°16'-31°23'S) with rank of temperature between 27.54°C and 17.67°C, were Ceratium incisum, C. carriense, C. breve, C. teres, C. falcatiforme, C. euuarcuatum, C. pavillardi, Dinophysis caudata, Ornithocercus steinii, O. Thumi, O. magnificus, Pyrocystis fusiformis, Protoperidinium quarnerense, P. cf conicum, P. longipes, P. ocanicum, P. pedunculatum, Prorocentrum micans, Podolampas bipes, and some Epiplocides reticulata, Eutintinnus lusussundae, was indicators of oceanic waters advanced to chilean area. At to 30° S, the dinoflagellates were most dominant groups, with C. tripos, C. furca, C. pentagonum var subrrostrum, Goniodoma polyedricum, G. polygramma, species.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Distribution ; Phytoplankton ; Biomass ; Diatoms ; Chlorophylls ; Distribution ; Phytoplankton ; Biomass ; Community composition ; Diatoms ; El Nino phenomena ; Oceanographic stations ; Chlorophylls
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    Type: Journal Contribution , Non-Refereed , Article
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  • 12
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    Distribución del primer nivel trófico (fitoplancton) en el Pacífico ecuatoriano, período 1996-1997 (pre-El Niño) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este artículo describe las condiciones bio-oceanográficas del primer nivel trófico, distribución y concentración de la biomasa fitoplanctónica (clorofila "a") y contajes celulares) a nivel superficial y subsuperficial de la capa fótica a los 75 m. de profundidad, se da la distribución de especies indicadoras del fitoplancton y su relación con las variables de temperatura y nutrientes, registrados en tres cruceros oceanográficos realizados en octubre/1996, abril-mayo/1997 y agosto/1997.
    Description: Published
    Keywords: Distribution ; Biomass ; Phytoplankton ; Trophic levels ; Chlorophylls ; Indicator species ; Distribution ; Biomass ; Chlorophylls ; Phytoplankton ; Indicator species ; El Nino phenomena ; Trophic levels ; Multiship expeditions
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  • 13
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    Distribución del fitoplancton en la región costera del mar ecuatoriano, durante diciembre 2000 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: La presente investigación describe el comportamiento del primer nivel trófico (clorofila, feopigmentos, biomasa celular e indicadores del fitoplancton) en el ecosistema costero del mar ecuatoriano, conocer la incidencia de las principales especies que se encuentran formando núcleos de mayor productividad e inter-relacionadas con las condiciones ambientales durante el Crucero realizado en diciembre/2000.
    Description: This study was carried out during December 2000, onboard the R/V Orion of the Oceanographic Institute of the Ecuadorian Navy. The objetive was to establish the relationship between chlorophyll "a" content and the abundance of species or groups of species of micro-algae inside a region with ocean-climate system variability in the Tropical Pacific Ocean along the Ecuadorian coast. The highest chlorophyll content was found between 1°3 S and 3°S, with a positive correlation to the cellular biomass, including species of phytoplankton such as Rhizosolenia stoltherfothi, Thalassiosira subtiles, Pseudonitzschia delicatissima, P. longissima, Leptocylindrus danicus, Gymnodinium sp., y Messodinium rubrum. However, the biomass calculated from the content of the 55 µm mesh size was dominated by Rhizosolenia imbricata, T. subtiles, Chaetoceros affinis, L. danicus, Chaetoceros curvisetus. The dinoflagellates showed concentrations of species that characterized zones of warm water masses (Protoperidinium crassipes, Gonyaulax polyedra, Dinophysis caudata towards the NE, and C. tripos, G. polyedricum, C. furca towards the SE of the study area). The phytoplankton distribution did not reflect the position of the Equatorial Front, determined as an almost zonal phenomenon with a weak surface thermal gradient (23-25°C). The high abundances of M. rubrum and Gymnodinium sp., might have been related to the influence of the cold Humboldt Current and this may have produced some "red tide" events towards the coastal margin.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Distribution ; Phytoplankton ; Biomass ; Chlorophylls ; Indicator species ; Distribution ; Phytoplankton ; Chlorophylls ; Biomass ; Indicator species ; Cruises
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  • 14
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    Composición, distribución y abundancia del plancton en el estuario de San Lorenzo, Esmeraldas - Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo es una contribución al estudio del plancton estuarino presente en el área comprendida del Canal de San Lorenzo, provincia de Esmeraldas, para lo cual existe poca información sobre este tema.
    Description: The present work comprehends the study of the qualitative and quantitative distribution of the phytoplankton, zooplankton and ichthyoplankton at San Lorenzo in Esmeraldas Province. For the effect 12 stations were established located at the Estero Chimbusal, Estero Nadadero, Canal de San Lorenzo. The sample was taken in the phases flow and refflux the days ist and 2nd of september 2001. There were identified 63 species in water samples and 77 species in samples with net of 50u in the community of the phytoplankton. The diatoms prevailed dominant and in smaller concentration the dinoflagellates, tintinnoids, cianobacters and flagellates. The cell biomass was represented by Messodinium rubrum and Chaetoceros compressus, they were the most abundant species in all the area. In net samples of 50u the dominant species were: Biddulphia sinensis, B.mobiliensis, Chaetoceros compressus, Pleurosigma angulatum and Skeletonema costatum, tytical of a high fertility in the area. The regimen refflux registered 17 taxas of zooplankton an the dominants were Copepods (35%), Chaetognaths (34%) and the Crustacean Larvae such as Zoeas of Brachyuran (11%). The regimen flow showed 14 taxas and were evident the Copepods (60%), Fish Larvae (21%) these groups of zooplankton were considered dominant and frequent. With regard to Ichthyoplankton registered in the regimen flow 3462 fish eggs/10m², the dominant families were Engraulidae (62%), Clupeidae (33%), however it was observed a high abundance of fish larvae with a total 11495/ 10m² and registered the dominant families Clupeidae (40%), Engraulidae (37%) and Scianidae (16%). The regimen refflux presented the biggest abundance on eggs of fish with 19649 eggs/ 10m². The dominant families were Clupeidae 68% and Engraulidae 31%, the fish larvae were low on abundance with 826 larvas/10m² being the dominant families Clupeidae (57%), Scianidae (24%) and Engraulidae (14%).
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Distribution ; Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Diatoms ; Distribution ; Composition ; Abundance ; Plankton ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Diatoms ; Biomass
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  • 15
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    Bioensayo de toxicidad (CL50) del dispersante de petróleo BP 1100 WD, con fitoplancton marino (Tetraselmis sp) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente estudio se considera de carácter preliminar especialmente en lo referente al cálculo de la concentración media letal (CL50), de esta manera se evalúa el grado de toxicidad del dispersante de petróleo BP 1100 WD considerado como agente contaminante cuando se utiliza para dispersar manchas de petróleo regado en el mar. Con esta información se establece el impacto potencial que puede producir este dispersante en el medio ambiente marino.
    Description: This study was made in order to evaluate the degree of tocixity of the BP 1100 WD petroleum dispersant, through a biossay under laboratory conditions. The half-letal concentration (CL50) was obtained in this way. For this purpose, microcells of the Tetraselmis sp. from the Gulf Guayaquil were used. the evalues obtained through the Bliss statistical method are shown in Table 1. The result of CL50 = 2.08 PPM. Standard error = ± 1.04 PPM. The variance of CL50= 0.0175959. The value of Ch²(X²) was 5.1598, whose value is less than Pearson's table. For reason, we accept the hypothesis of the existence of homogenity in the sampled population and the value of CL50 is statistically valid. The value of the mortality curve was: y= 5.0736 ±(1.7679) (X-0.2760) Furthermone, arithmetic graphic calculation and logarithmc calculation were perfomed.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Toxicity ; Phytoplankton ; Dispersants ; Bioassays ; Toxicity ; Phytoplankton ; Dispersants ; Pollution indicators
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 16
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    Plancton alrededor de las Islas Galápagos durante el crucero oceanográfico efectuado en mayo de 2004 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo comprende la composición y distribución del plancton en las Islas Galápagos. Para el efecto se establecieron 13 estaciones ubicadas en las secciones 92° - 90° y 89° W, realizadas en mayo del 2004.
    Description: The paper has reference of the composition and distribution of the species the phytoplankton and zooplankton around of Galapagos Islands. It was established 13 stations located in the sections folowing 92°-90° y 89° west, carry out during in may of 2004. It was identificated 58 species phytoplankton in water example and 70 species in net (50u). The diatoms were dominants and low concentration was registered the Dynoflagellates, Cocolitophorides, Silicoflagellates, Cianobacters, Tintinnoids. The cellular biomass were represented main the species Mesodinium rubrum y Gynodinium sp. that were the high abundance, coincidental with the species obtained of net example was registered Rhizosolenia hebetata and Thalassiosira subtilis that characteristic the most productivity in the sections 90° West and 1° sur. The zooplankton were registered 17 taxa of zooplankton representated the groups dominants the Copepods (35%), Chaetognaths (34%), and Zoeas of Brachiuras (11%) and it were frecuent around the Galapagos Islands. The species of chaetognathas was registered the dominance Sagitta enflata asociated S. pacifica with the hight density of individuals localizated in the section 90°W and 1° north in the surface. Aditionally it was registered the species Sagitta hexaptera determinance the hight abundance in the subsurface in the section 89°W between the 1° to 3° southeastern of the Galapagos Islands.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Biomass ; Plankton ; Distribution ; Phytoplankton ; Zooplankton ; Diatoms ; Plankton ; Community composition ; Distribution ; Phytoplankton ; Zooplankton ; Diatoms ; Biomass ; Cruises
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  • 17
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    Distribución latitudinal del fitoplancton entre Islas Cocos - Galápagos, Noviembre-Diciembre 2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El propósito de esta investigación fue realizar una evaluación de la distribución de las especies del fitoplancton (red 55u), durante noviembre-diciembre-2001, en una región latitudinal que implica dos áreas insulares del Pacífico Tropical Islas Cocos e Islas Galápagos, estudios que serán de gran contribución científica para el conocimiento de estas especies en la región del mar ecuatoriano.
    Description: The investigation is a contribution to the study of the geographical distribution of phytoplankton. Water samples were obtained with a 55 µm mesh size net in a transect from Punta Arenas to Cocos Island (Costa Rica) and to the Galapagos Islands (Ecuador), on board R/V Robert Seaman of the Sea Educational Association (Woods Hole), between November 26 and December 10, 2001. The identification of 91 phytoplankton species was possible, including 24 Centricae and 11 Pennatae diatom species, 43 dinoflagellate species and 13 species among others (Tintinnids, Silicoflagellates and Cianophytas). In the northern part of the transect, between 6° and 5° N, the species Pseudonitzschia delicatissima was dominant, this species is associated to the presence of species such as Blefarocysta splendor-maris, Ceratium furca, Goniodoma polyedricum, and Planktoniella sol (5° S), representing strictly warm water conditions. Thermal values were between 27.25 °C and 27.04 °C and salinities of 33.00 UPS were found. The presence of Ornithocercus steinni and Pyrophacus steinni, species of warm and oceanic conditions, possibly inidicate areas of not very defined mixtures in the intermediate part of the studied transect (4° S - 0°) with temperatures ranging between 26.8 °C and 24.6 °C and salinities between 33.23 and 33.42 UPS. The biomass of phytoplankton decreased in the southern region (northwest of Floreana Island, 1°1 S) and very high diversity of species of warm conditions (Ceratium tripos), and the cold condicitions (Chaetoceros and Bacteriastrum) was found; the temperature record showed 21.5 °C and the salinity was 34.86 UPS.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Geographical distribution ; Phytoplankton ; Biomass ; Species diversity ; Geographical distribution ; Phytoplankton ; Biomass ; Species diversity ; Cruises ; Oceanic islands
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  • 18
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    Determinación de la toxicidad en dispersantes de petróleo mediante bioensayos para calcular el CL50 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este tipo de experimentación se ha centrado en la estimación de la Concentracion Letal Media (CL50), que significa el cincuenta por ciento de organismos muertos en un tiempo determinado.
    Description: We have gotten concentrations between 1.36 and 52.88 ppm, these values represent the rank of Median Lethal Concentration (50%) of mortality and we considerate it as the maximum and minimun values of oil dispersants for Tetraselmis sp., phytoplankton microorganism that corresponds to the first link of marine and estuarine trophic chain. The exponential tendency and the less and high critic values of CL50 concentrations were determined to make up the toxic scale: 1 to 10 ppm toxic moderate; 11 to 30 ppm toxic media and 31 to 60 toxic low. Since 1990, the Institute Oceanographic of the Ecuadorian Navy carried out 60 toxic bioassays of oil dispersants with the purpose of determinate CL50, and gave us the ability to controlate the toxic grade of different kinds of detergent substances that are present in oil spills in different areas such as sea, estuaries and rivers.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Toxicity ; Bioassays ; Detergents ; Phytoplankton ; Mortality ; Dispersants ; Toxicity ; Bioassays ; Detergents ; Mortality ; Dispersants ; Phytoplankton
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  • 19
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    Composición del plancton en la Puntilla Santa Elena durante agosto 2002 (Ecuador) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Esta investigación comprende los estudios del fitoplancton-zooplancton-ictioplancton, realizados en tres sitios de la Península Santa Elena durante agosto 2002, área designada para la proyección de "Arrecife Artificial de las Fuerzas Militares del Ecuador": un avión, barco y tanque de guerra, estructuras artificiales consideradas como basura chatarra (de gran tamaño), que serían recicladas para la bio-exploración artificiales hacia la seguridad de los recursos marinos del Ecuador. En el Estudio Ambiental se describen las consideraciones necesarias de carácter multidisciplinario (EIA-INOCAR, 2002).
    Description: The objective of the present study was to carry out a assess of plankton productivity nearest of the Puntilla Santa Elena, for the projection of future Artificial Reefs, carried out by the Oceanographic Institute of the Ecuadorian Navy, during august 2002. The investigated area presented high concentrations of primary and secondary productivity in the column of water (0-10m), with certain daily fluctuation characteristic of the trphic coastal systems that shows the circulation of the coastal currents and submarine topography. The main alimentary complements were the centric diatoms with high chlorophyll (Phytoplankton); the copepods and cladocera were the representative in the second level trophic (Zooplankton). It was a high diversity of fish eggs and larvae, information that would confirm that this sector is an spawn area for this month. The high diversity of crustaceans larvae, makes show off that the substrates of artificial reefs will be an attraction for crabs, shrimp and other crustaceans. Although the stadiums of sessile benthic organisms presented low density of briozoos larvae, cirrepedios, shells (bivalve mollusks and gastropods), they would be those that would populate the superficial layer of the new artificial structures. These marine organisms of the food chain constitute an excellent natural resource for fish and invertebrate organisms, consequently the artificial reefs would be favorable for the reception of the sessile organisms (as macroalgae and corals) and refuge area to alimentary support for other organisms like the fish.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Biological production ; Plankton ; Zooplankton ; Phytoplankton ; Artificial reefs ; Biological production ; Artificial reefs ; Plankton ; Zooplankton ; Phytoplankton ; Ichthyoplankton
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  • 20
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    Variabilidad temporal del fitoplancton en áreas costeras del mar ecuatoriano y su interrelación con el evento La Niña 1999-2000, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: La presente investigación tiene como objetivo conocer la variabilidad espacio temporal del fitoplancton y su interrelación con el evento La Niña 1999-2000 durante la época húmeda y seca considerando los parámetros ambientales: contajes celulares, abundancia relativa, en las estaciones fijas La Libertad y Manta.
    Description: Twenty four and twelve coastals stations were analyze in Manta during the event La Niña 1999 - 2000, graphic of the (with a net of 50u) and the relation with the parameters physical and quimical. The physical conditions during the development of "La Niña 1999-2000" event, were not continued as a defined pattern, showing particular characteristics for each region of the south Pacific ocean. In Ecuador was evidented that the biological productivity creased considerally in the Libertad during the year 2000 before evidencing the upwelling with chlorophyll nucleus creasing of the abundance relative. The main species with mayor cell density in the Libertad were Chaetoceros affinis, Rhizosolenia hebetata, R. stolterfothii, Thalassiosira subtilis, Leptocylindrus danicus. The species representatives in Manta were with mayor cell density in the three cruises were Hemiaulus sinensis, Rhizosolenia imbricata, Chaetoceros curvisetus, Ch. coarctatus, Dityllum brighTwelli which showed variability in their distribution, shaping high nucleus cells.
    Description: Incluye ref.bibl.,grafs.
    Description: Published
    Keywords: Biological production ; Phytoplankton ; Temporal variations ; Biological production ; Phytoplankton ; Upwelling ; Abundance ; El Nino phenomena ; Cell counters
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 21
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    Variación estacional del fitoplancton en una estación fija en el estero del Muerto durante 1999-2000-2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del presente estudio es conocer la variación estacional de las especies del fitoplancton y su relación con las condiciones ambientales durante el período en estudio.
    Description: It is presented the investigations of clorofila a cell counts, and qualitative (net 50u), that used simultaneously provided valuable ecological information on the community of the phytoplankton accomplished in the interior Gulf of Guayaquil, between 11 august of 1999, 14 of march of 2000 and 14rd of may/2001. They were identified 81 species in water samples and 80 species in net samples (50u), in the community of the phytoplankton. The diatoms prevailed dominant and in smaller concentration the dinoflagellates, coccolithophores, cianobacters, flagellates and tintinnoids. In cell counts Skeletonema costatum, Microspora tumidula y Mesodinium rubrum they were the species of greater ocurrence in all the area. In net samples (50u), were registered species typical of environment estuary: Skeletonema costatum, Ulotrix aequalis, Cyclotella menenghiniana, Chaetoceros vistulae, Pleurosigma angulatum, Actynoptichus senaritus. The distribution and dominance of species presented a which one characteristic for the area. Furthermore, they were observed some species of character benthic.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Phytoplankton ; Estuaries ; Biomass ; Chlorophylls ; Diatoms ; Environmental conditions ; Marshes ; Seasonal variations ; Phytoplankton ; Chlorophylls ; Diatoms ; Environmental conditions ; Cell counters ; Estuaries ; Fixed stations ; Marshes ; Biomass
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  • 22
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    Variabilidad fitoplanctónica en 5 bahías, Islas Galápagos (Ecuador) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El aporte de esta investigación, será dar una evaluación sobre la distribución cuali-cuantitativamente del fitoplancton y paralelamente iniciar una base de datos en 5 bahías de las Islas Galpagos.
    Description: The investigations of chlorophylls, cell counts, and qualitative or indicators species (net 50u), were presented, that used simultaneously provide valuable ecological information on the community of the phytoplankton accomplished in five bays: Bahia Naufragio (San Cristóbal Island), B. Pto. Velasco Ibarra (Floreana island), B.Villamil (Isabela Island), B. Academia (Santa Cruz Island), B. Darwin (Genovesa Island), during September- October/1999. Biomass in weight (chlorophyll "a") of 0.560 mg/m³ corresponds to a cellular biomass of 403.628 cel/l, with a relationship of 1.1, with exception of the area of upwelling in Isabela that was 1.3 (1.546 mg/m³: 5405.123 cel/l). 71 species were identified in water samples and 132 species in net samples (50u) in the community of the phytoplankton on each Island. The diatoms were dominant and the Dinoflagellates, Tintínnidos, Cocolitofóridos, Cyanophytas, Microflagellates and Ciliados were found in a low concentration. In cell counts Thalassiosira subtilis and Gymnodinium sp., were the species of high occurrence in all the bays, except for Isabela wich presented a bloom of Chaetoceros curvisetus. In net samples (50u), on Isabela Island and Floreana Island indicators species of upwelling were registered, among them we found: Corethron criophilum, C. curvisetus, Thalassiosira, subtilis, Gymnodinium sp.; On San Cristóbal y santa Cruz the species diversity evidenced a mixture zone mainly with species of tropical warm conditions as Ceratocorys horrida, Blepharocysta splendor, C. tripos, C. trichoceros, C. deflexum, C. contortum, C. vultur, C. massiliense, C. strctum, Dinophysis caudata, D. forthii, D. doriforum, Ornithcercus steinii, O. magnificus, Goniodoma polyedricum, Gonyaulax sp. The distribution of species presented a particular characteristic for each bay. Furthermore, some benthic species were observed wich are indicators from strong turbulence zones in the water column. As a general rule for the season between september and october of 1999, was observed a good biological productivity associated with the current of Cromwell with light indicator toward the next seasonal change, probably by local and extra regional process influence of the climate conditions.
    Description: Incluye ref.bibl., ilus., grafs.
    Description: Published
    Keywords: Phytoplankton ; Biomass ; Geographical distribution ; Chlorophylls ; Species diversity ; Variability ; Phytoplankton ; Chlorophylls ; Biomass ; Geographical distribution ; Species diversity
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  • 23
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    Diagnóstico del plancton en el estuario de San Lorenzo en agosto 2006 (Esmeraldas-Ecuador) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Se realizó un monitoreo del plancton en el estuario de San Lorenzo en junio 2006. En los resultados se registró 128 especies del fitoplancton (método cuantitativo) y 50 especies (cualitativo). Las diatomeas más representativas fueron S. costatum, T. nitzschioides, P. longissima, L. danicus, Navicula sp., P. sulcata: T. nitzschioides. Thalassiosira sp. y flagelados (cuantitativo); S. costatum, Coscinodiscus sp., N. sigma y P. Sulcata (cualitativo). La presencia de Gymnodinium sp. P. maximun y M. rubrum podría asociarse con la formación de mareas rojas al interior del estuario. En los resultados del zooplancton registrarón 16 taxas constituidos mayoritariamente por Zoeas de Brachiura y Copépodos, distribudidos en toda el área de estudio principalmente en las estaciones 6 y 7 cercanas a la confluencia del río Nadadero Grande y el Canal San Lorenzo, coincidente con la mayor biomasa del fitoplancton y zooplancton que serian propias del estuario con poco intercambio de masas de aguas externas. Los índices de diversidad reflejan valores intermedios entre 2 a 3 bits/cel tanto para el fitoplancton y zooplancton. Los esteros y efluentes que conforman el Canal de San Lorenzo, sector considerado como un nicho ecológico de importancia pesquera y planctónica asociado al manglar en la comunidad de San Lorenzo.
    Description: The plankton monitoring in the San Lorenzo estuary in june 2006. Were registered 128 species of the phytoplankton (cuantitative method) and 50 species (cualitative). The most representative diatomeas were S. costatum, T. nitzschioides, P. longissima, L. danicus, Navicula sp., sulcata P. ; T. nitzschioides, Thalassiosira sp. and flagellated (cuantitative); S. costatum, Coscinodiscus sp., N. sigma and P. sulcata (qualitative). The presence of Gymnodinium sp., P. maximun and M. rubrum could be associated with future risks for the formation of red tides in this estuary. In the results its Zooplancton registered 16 mainly taxas constituted by Brachyura Zoea and Copepods, distributed in the whole area of study mainly in stations 6 and 7 near the confluence of the Nadadero Grande river and the San Lorenzo estuary, coincident with the high biomass of the phytoplankton. Ichthyoplankton registered abundance of egg stages of fish in station 4 and larvae of fish in station 7, sites that could be considered like ecological niches of high biological productivity. The diversity indices reflect intermediate values between 2 to 3 bits/cel for the phytoplankton and zooplankton. The estuaries and effluents that conform the San Lorenzo channel, this area is considered like an associated ecological niche the fishing importance and the plankton biodiversity when mangrove in the community of San Lorenzo.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Zooplankton ; Biomass ; Eggs ; Estuaries ; Plankton ; Phytoplankton ; Fish larvae ; Species diversity ; Diatoms ; Plankton ; Diatoms ; Phytoplankton ; Zooplankton ; Biomass ; Fish larvae ; Eggs ; Abundance ; Estuaries ; Species diversity
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  • 24
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    Relación fitoplancton-zooplancton en el Pacífico Ecuatorial (Ecuador), durante septiembre 2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo es una contribución al conocimiento de la bio-oceanografía del mar ecuatoriano, forma parte del proyecto de Monitoreo de las condiciones oceanográficas en el mar ecuatoriano y su relación con eventos de El Niño, realizadas en el B/I ORION del Instituto Oceanográfico de la Armada (INOCAR) en septiembre-octubre 2001, como un aporte a la comunidad científica.
    Description: The present research corresponds to the cruise carried out by the Oceanographic Institute of the Ecuadorian Navy in september 2001, between 89°W - 81°1W and 1°N - 3°3S. The distribution of plankton populations associated with upwelling areas of the coastal brunch of the Humboldt Current in the Gulf of Guayaquil, and toward the Galápagos, upwelling of the Cromwell Current, forming patches in the central region and toward the Gulf of Guayaquil, is decribed. Increased phytoplankton (diatoms) production was found south of the equatorial region, coincident with the presence of dinoflagellates species of warm-oceanic waters allowing slight mixed areas. The higher abundance of zooplankton (copepods) were found to the east of the Galápagos Islands, decreasing toward the continent. These bio-geographic conditions point to higher productivity areas to the south and lower productivity areas to the north of the studied area, characterized by the position of the equatorial front. A. patch the high biological productivity was also evidenced in the oceanic region, atypical condition associated to the global cooling of the La Niña event, and/ or advances of upwelling waters toward the continent, processes of great importance for the pelagic resources of Ecuador.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Biological production ; Geographical distribution ; Phytoplankton ; Zooplankton ; Population density ; Diatoms ; Phytoplankton ; Diatoms ; Zooplankton ; Biological production ; Upwelling ; Population density ; Cruises ; Abundance ; Geographical distribution
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  • 25
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    Cocolitofóridos identificados en el fitoplancton de aguas ecuatorianas (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Muestras del fitoplancton de aguas de mar y de red de arrastre fueron recolectadas abordo del B.A.E "ORION" del Instituto Oceanográfico de la Armada, durante el período de 1972 -1979. La mayor parte de las especies fueron identificadas mediante el microscopio estandar de Zeiss con optovar incorporado, y el microscopio invertido utilizado para los contajes celulares. La identificación de las células más pequeñas fue confirmada con el Microscopio Electrónico de Barrido. 37 especies de cocolitofóridos fueron reconocidos y serán incorporados en los conteos celulares de las investigaciones futuras. Estos organismos constituyeron una población muy importante del fitoplancton marino de aguas ecuatorianas, y contribuyeron en muchas ocasiones, hasta con el 90% de la biomasa total.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Description: Cocolitofóridos
    Keywords: Phytoplankton ; Cells ; Phytoplankton ; Cells
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  • 26
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    Distribución y abundancia del plancton estuarino en el Canal El Morro, Posorja (junio 2006) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El proyecto de "Gestión Ambiental de la Armada" en el área estuarina adyacente al reten Naval de Posorja, tuvo como objetivo realizar un muestreo de plancton y sus condiciones ambientales actuales, a fin de conservar los ecosistemas marino-costeros y su diversidad biológica para el beneficio de la población local, la ciencia y educación establecido en la estrategia de desarrollo sustentable adaptadas al Cambio Climático (Gaibor, et al., 2000).
    Description: During the phytoplankton and zooplankton studies in the Morro Channel near to Posorja Navy in april/2006. The phytoplankton communities are identify 94 species (quantitative) and 81 species (qualitative), being the centric and pennate diatoms the most frequent group in both methodologies. The abundant and frequent species were Thalassiosira sp., T. nitzschiodes, Navicula sp., P. sulcata, S. costatum (0m); T. nitschioides, S. costatum, P. sulcata, M. nemuloides (bottom of the column of water); and in the qualitative analysis the most abundant species were S. costatum, T. nitzschioides, P. sulcata, Chaetoceros curvisetus. In consideration to the harmful phytoplankton, the presence of Prorocentrum maximum, Dinophysis caudata and Noctiluca scintillans species that it have provoked blooms causing red tides in the Gulf of Guayaquil (intern and external). The zooplankton was evidenced 25 groups represented by micro-crustacean (copepod, brachyura zoeas, cirripedia larvae, eufáusidos, decapods and other groups like the chaetognata. The component ichthyoplankton registered low density of larval stadiums of fish. The diversity indexes reflect security intermissions between 2 to 3 bits/cell of the plankton.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Phytoplankton ; Zooplankton ; Estuaries ; Geographical distribution ; Phytoplankton ; Zooplankton ; Abundance ; Estuaries ; Geographical distribution
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  • 27
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    Bio-oceanografía en el entorno de la isla de La Plata, durante agosto/2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo de la presente investigación, fue dar un comprensivo entendimiento de las condiciones bio-oceanográficas del fitoplancton-zooplancton-ictioplancton, y las interacciones con el medio circundante (físico, químico), procesos que son complicados cuando involucran aspectos hidrográficos costeros como áreas de afloramiento, áreas de pesca y áreas de soporte alimentario para los diferentes recursos marinos costeros planctónicos-bentónicos y aves-mamíferos marinos.
    Description: The oceanographic Institute of the Ecuadorian Navy carried out a coastal cruise around La Plata Island in August 2001 onboard the R/V RIGEL. The main objective was to study the distribution and interaction of ecological variables affecting phyto-zooplankton and ichthyoplankton, as a tool for the evaluation of coastal marine resources. An important aspect is the bathymetry of the area influencing the biological component. Shallower waters are found southwards allowing the occurrence of upwelling and advection processes that bring nutrient rich waters to the surface. This is shown by the high chlorophyll "a" content found in the south, favorable for phyto- and zooplankton production, also abundant in that region. The cellular biomass was composed by species that are indicative of mixed waters, warm-oceanic and upwelling waters with increased abundance towards the south. The tendency of increased biological productivity in the southern margin of La Plata Island is coincident with other ecosystems such as the Galápagos Islands and Santa Clara Island. These southern areas area important ecological niches, i.e. birds and marine mammals, decisive for coastal marine resources support. It is of extreme importance to continue the vigilance and control of these areas, specially due to the negative effects that the proximity of commercial marine traffic may produce.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Marine resources ; Phytoplankton ; Zooplankton ; Biological production ; Marine ecology ; Marine ecology ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Upwelling ; Biological production ; Marine resources ; Cruises ; Oceanic islands ; Coastal zone
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  • 28
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    Variabilidad anual del fitoplancton marino en áreas costeras de La Libertad y Manta (Ecuador), su inter-relación con eventos El Niño (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En este artículo se describen los resultados anuales de la biomasa fitoplanctónica cuantitativa (primer nivel trófico), períodos de mayor densidad fitoplanctónica anual en dos estaciones fijas de Manta (1991-1997), La Libertad (1994-1997) y su inter-relación en condiciones frías de 1996 y eventos cálidos El Niño en 1991-92 y 1997.
    Description: This paper describes the phytoplankton biomass composition and distribution (cell/l) in the surface and subsurrface levels, its seasonaly variability in two coastal station (ten miles offshore) in the south-eastern Pacific Ocean: Manta (1991 to 1997) with two event El Niño (1991-92; 1997); and La Libertad (1994 to 1997) with a event El Niño 1997. In this time its registered a could event during 1996 year. The highest concentration of phytoplankton 〉5x10 cell/l, its was present with the seasonal changes during winter to summer (april to may), and summer (june, july, august, september and october), its relationship with the termoclina position of 22-23°C. The less densities in this areas were present between the El Niño 1991-1992, to end 1995 and 1997 events. The phytoplankton was more representative neritic organisms to as Nitzschias, Chaetoceros, Rhizosolenias, Gymnodinium spp. and Oxytoxun spp., Messodinium rubrum, and microflagellates. In relationship of phytoplankton abundance during this study in Manta and La Libertad, registered different compositions: 1) Less phytoplankton biomass before El Niño 1991-1992; 2) Highest phytoplankton biomass before El Niño 1997.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Distribution ; Biomass ; Phytoplankton ; Variability ; Distribution ; Biomass ; Phytoplankton ; El Nino phenomena
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 29
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    Distribución del fitoplancton y su comportamiento en el afloramiento en las Islas Galápagos (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Los objetivos de este crucero han sido colectar información que permitirá comprender mejor la dinámica poblacional (cuali-cuantitativo) de las diferentes masas de aguas que afloran al este y al oeste de las Islas Galápagos y su interacción entre las islas, estos resultados permitirán dar una mejor apreciación sobre áreas de mayor fertilidad marina ( clorofila "a", contajes celulares), organismos indicadores del afloramiento y su posible asociación con áreas de riqueza ictiológica.
    Description: During the cruise COII99, that took place September the 20th until October the 8th of 1999, aboard the V/R ORION of the ecuadorian Navy, where collected samples for the estimate of chlorophyll were, as well as cells counts and indicators of the phytoplankton are analyzed in 20 oceanographic stations (89-92°W; 1°N-2°S). The average of chlorophyll "a" surface was of 0.250 mg/m³, the highest concentration was between 0.526- 0.529 mg/m³, westward of Isabela Island, associated with the upwelling of Cromwell;and other flow to the southeast of the Islands (90°W) associated with the Current of Humboldt, cue this match with the standards of these currents for the season, and they have an impact on the high biological productivity. The smallest concentrations were found in the north side of the Galapagos. 88 species were identified in water samples and 119 species in net samples. The diatoms were dominant, in low concentration Dinoflagelados, Tintínnidos, Cocolitofóridos, Cyanophytas, Microflagelados and Ciliados. pseudonitzschia delicatissima, Thalassiosira subtilis and Gymnodinium sp. they were species with greater cellular content in the sections 92°, 91°, 90° and 89°W, probably related to three different water masses ( equatorial subtropical surface, of Cromwell and Humboldt) that originated a greatdiversity of species in the insular ecosistem. The smaller biological productivity was registered northward of the study area, related to an increase in species of warm conditions Planktoniella sol, Rhizosolenia imbricata, Proboscia alata, Ceratium azoricum, C. tripos. C.trichoceros, C. fusus, C. teres, C. lunula, C.furca, C. vultur, C. pentagunum, Gonyaulax polyedra, Goniodoma polyedricum, Protoperidinium crassipes), indicating water masses with low content of chlorophyll "a" and nutrients.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Phytoplankton ; Biological production ; Chlorophylls ; Indicator species ; Population dynamics ; Phytoplankton ; Chlorophylls ; Biological production ; Indicator species ; Ichthyoplankton ; Cruises ; Population dynamics
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  • 30
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    Composición y variación estacional del fitoplancton, zooplancton y microbentos en el estuario interior del Golfo de Guayaquil, durante el año 2003 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo comprende el estudio de la distribution cualitativa y cuantitativa del fitoplancton en el Golfo de Guayaquil, durante dos épocas: Húmeda y seca. El propósito del presente trabajo con respecto al zooplankton está orientado a conocer los cambios en la composición, abundancia y diversidad del zooplancton y en particular el Phyllum Chaetognatha con el objetivo de relacionar la distribución de las especies de Quetognatos con los parámetros físicos. En lo relacionado al estudio del microbentos, se pretende estudiar la composición específica y la abundancia relativa de las especies de la microflora béntica y de la microfauna bentónica y su relación con factores ambientales.
    Description: The present work comprehends the study of the qualitative and quantitative distribution of the phytoplankton in the Gulf of Guayaquil, during two season: Winter and summer. There were identified 63 species in water samples and 79 species in samples with net of 50u in the community of the phytoplankton. The diatoms prevailed dominant and in smaller concentration the dinoflagellates, cianobacters flagellates and tintinnoids. The cell biomass was represented by Paralia sulcata and Skeletonema costatum, they were the most abundant species in all the area. In net samples of 50u the dominant species were: Polymyxus coronalis, Thalassiotrix frawenfeldii, Pseudonitzschia longissima y species benthics: Coscinodiscus perforatus y Cyclotella menenghiniana. The most biomass of zooplankton was registered at the 17 ava bright and the less productivity of zooplankton was registered at Daule River however it was observed a coexist a good diversity of zooplankton groups during season. Stablishment that the species of chaetognatha has a distributions variability in the space and temporal, during september was observed the hight diversity and destacated the most individual numbers density of S. peruviana, S. bodoti and S. neglecta at the Canal of Cascajal and Posorja areas. It was observed a broad distribution main of the species S. bedoti and S. neglecta in the Guayas river ecosystem where it was registered sporadic at 23 stations located near of Mondragon Island until the Canal of Cascajal. It was reported to first registered the species S. bedoti and S. neglecta at the stations denominated second of Perimetral bright and it is distribution continued until the Portete and 17 ava brights localized at interior ramal of Estero Salado during wet season. In the related to the study of the microbenthics, it is sought to study the composition of species and the relative abundance of the species of the benthics microflora and of the benthics microfauna and their relationship with environmental factors.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Phytoplankton ; Biomass ; Zooplankton ; Benthos ; Geographical distribution ; Estuaries ; Diatoms ; Microorganisms ; Community composition ; Seasonal variations ; Phytoplankton ; Diatoms ; Biomass ; Zooplankton ; Microorganisms ; Benthos ; Geographical distribution ; Estuaries
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  • 31
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    Comunidades del plancton en la Caleta Aeolian de la Isla Baltra - Galápagos (Ecuador), durante 2005 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El propósito del trabajo es determinar la composición, abundancia de los grupos dominantes del fitoplancton y zooplancton, establecer las especies de Quetognatos y su relación con la temperatura superficial del mar durante marzo de 2005 correspondiente a la época húmeda.
    Description: During the study one collected superficial water samples in 12 stations distributed in the Aeolian Bay of the Baltra, Galapagos Islands to determine the primary productivity and secundary on the chain it would feed, the samples of plankton were collected during days 9 to the 13 of march of 2005. In relation to the biomass cellular one identified 24 species in the superface waterproof cloak and 84 species were determined in the samples of network of 50u. In the phytoplankton community, the diatoms prevailed dominant and in smaller concentration the dinoflagelados groups, silicoflagellates, cocolithoforids. In counts cells the dominant species in the area in study were Gymnodinium sp., Filamentos sp., Coscinodiscus excentricus, Thalassiotrix frauenfeldii. In the netwoork samples (50u), the typical water species were registered with high productivity characteristics; Corethron criophyllum, Chaetoceros peruvianus. As far as the zooplanktony productivity a greater biomass collected with the network of 335u in comparison with the network of 600u was determined, and it stands out that the hight biomass of zooplankton was in station 4. Additionally a proportional relation inversely between the abundances of Eggs of fish and taxa of Quetognatos was observed. As far as the species of Quetognatos the presence in abundance order was observed Sagitta neglecta, S. bedoti, S. pacifica, these species are typically of wet season.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Plankton ; Primary production ; Biological production ; Phytoplankton ; Zooplankton ; Biomass ; Plankton ; Primary production ; Biological production ; Phytoplankton ; Zooplankton ; Biomass ; Abundance ; Community composition ; Fish eggs ; Surface temperature
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  • 32
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    Estudio de las comunidades del fitoplancton en los Ríos Daule, Guayas y Estero Salado (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del presente estudio es evaluar la biomasa, diversidad y relación del fitoplancton con las comunidades planctónicas estuarinas basándose en las condiciones ambientales durante la época de verano.
    Description: The principal objective was to know the distribution of chlorophyll, cell counts and qualitative (net 50µ) on the community of the phytoplankton accomplished in five profiles around of the city of Guayaquil (estuary interior) between 8th and 14th of may/2001. There were identified 87 species in water samples and 110 species in net samples (50µ), in the community of the phytoplankton. The diatomms prevailed dominant and in smaller concentration the dinoflagellates, tintinnoids, silicoflagellates, cianobacters and flagellates. In cell counts Pseudonitzschia longissima y Skeletonema costatum, they were the species of greater concentration in all the area. In net samples (50µ), were registered species stuarines and benthics: Polymixis coranalis, Actinoptychus splendes, Chaetoceros affinis, to report a height variability and abundance of species. The distribution and dominance of species presented a which one characteristic for the area.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Phytoplankton ; Distribution ; Biomass ; Rivers ; Environmental factors ; Summer ; Chlorophylls ; Species diversity ; Phytoplankton ; Distribution ; Chlorophylls ; Species diversity ; Biomass ; Rivers ; Salt marshes ; Environmental factors ; Summer ; Cell counters
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  • 33
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    Dinoflagelados del fitoplancton del Golfo de Guayaquil: II edición (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Se analizaron 44 muestras de plancton identificándose 103 especies y variedades de Dinoflagelados. La mayoría de las especies registradas por primera vez para el mar ecuatoriano. El análisis sistemático de las especies incluye: descripción, dibujos, medidas y referencias bibliográficas. El presente trabajo se llevó a cabo con el auspicio del Instituto Oceanográfico de la Armada del Ecuador, mediante la colecciones de muestras de fitoplancton marino, realizadas a bordo del BAE "ORION" en cruceros costeros y océanicos que llevó a cabo según el plan quinquenal de investigaciones oceanográficas 1971-1975.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Description: Dinoflagelados
    Keywords: Phytoplankton ; Phytoplankton ; Cruises ; New taxa
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  • 34
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    Diatomeas y silicoflagelados del fitoplancton del Golfo de Guayaquil: II edición (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Fueron estudiadas 44 muestras de plancton, de las cuales 189 especies y variedades de diatomeas y silicoflagelados fueron identificados. La mayoría de las especies son registradas por primera vez para el mar ecuatoriano. Las diatomeas centrales (centricae) es el más importante orden en el Plancton del Golfo, mientras las diatomeas pennales (Pennatae) es el orden más predominante en la región estuarina inferior. El análisis sistemático de cada especie incluye descripción, dibujos, medidas y referencias bibliográficas. Datos de temperatura, salinidad, clorofilas y producción primaria del Golfo de Guayaquil son consideradas como condiciones hidrobiológicas del área.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Description: Silicoflagelados
    Keywords: Phytoplankton ; Diatoms ; Diatoms ; Phytoplankton
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  • 35
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    Importancia ecológica del fitoplancton durante El Niño 1991-1993, en el Pacífico Ecuatorial (Ecuador) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del estudio fue determinar su importancia ecológica y diversidad de los principales grupos del fitoplancton durante El Niño 1991-1992, en tres cruceros realizados en la época cálida-húmeda del ecosistema del Pacífico Ecuatorial (1991, 1992 y 1993).
    Description: Thirty one surface and twenty four sub-surface (50 m) oceanographic stations were analyzed during three cruises: December 1991, march 1992 and march 1993. During this period a strong "El Niño" 1991-92 event appeared. The physical conditions during the development of "El Niño 91-92" event did not present a defined pattern during the three cruises, showing particular characteristics for each studied region of the Equatorial East Pacific Ocean. Evidence that the phytoplankton decreased drastically in december 1991 was found approximately three months before the high temperatures of march 1992. However, the biological productivity in march 1992 increased, probably due to the development of an intense sub-surface upwelling. Later in march 1993, the anomalous "El Niño" conditions prevailed, with the higher chlorophyll layer deepened to approximately 40m, specially, in the south west of the studied area. The main species with high cell density in the three cruises were B. splendor-maris, P. sol, G. polyedricum, C. tripos, R. alata, R. hebetata. These species showed variability in their distribution, presenting nucleus of associated Diatoms and Dinoflagellates. These environment conditions allowed us to establish the existence of inter-specific components between generalist species (diatoms) and specialist species (dinoflagellates); both groups were eurithermic species during "El Niño 1991-93".
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Phytoplankton ; Biological production ; Marine ecology ; Chlorophylls ; Diatoms ; Marine ecology ; Phytoplankton ; Upwelling ; Chlorophylls ; Diatoms ; Biological production ; El Nino phenomena ; Oceanographic stations ; Multiship expeditions
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 36
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    Bloom de Noctiluca scintillans y Ceratium dens en el Golfo de Guayaquil (2004) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo de este estudio fue difundir las investigaciones del bloom de C. dens y N. scintillans ocurridos en el Golfo de Guayaquil como parte del Proyecto de Mareas Rojas desarrollado por el Instituto Oceanográfico de la Armada (INOCAR).
    Description: This study presents the evolution bloom algal by means of the reception of three samples (with red tide) and two surface monitoring before made and after bloom of Ceratium dens. The 26 of august/04, bloom of Noctiluca scintillans was registered in front of the tourist beach of Jambelí and entrance of the Channel Santa Rosa with a duration between 3 to 5 days. The 1 of september/04 was registered the C. dens in the north of Jambelí island (Buoy of sea). The 7 of september/04 a great patch of red tide (〉 2km) caused by bloom C. dens was demonstrated. During the made sampling 3 and 4 of october/04, increase the diversity of the phytoplankton with 123 species in low tide and 84 species in high water, without presence of red tides C. dens was little. Local fishermen mentioned that the red tide was observed until the 24-25 of september, after of the high mortality of Cetengraulis mysticetus (Chuhueco) between to 10 to the 12 of august/04 in the external part of Jambelí, in the channel of Santa Rosa and tourist wharf of Port Bolivar; environmental condition that caused fishing conflicts in Port Bolivar.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Phytoplankton ; Algal blooms ; Algae ; Species diversity ; Algal blooms ; Red tides ; Algae ; Species diversity ; Phytoplankton
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  • 37
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    Distribución de la densidad fitoplanctónica en una estación fija costera. La Libertad (Ecuador), durante 1989-1993 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo pretende dar a conocer los resultados de la distribución estacional cuantitativa del fitoplancton (diatomeas y dinoflagelados), y su relación con masas de agua, dadas por temperatura y salinidad, desde 1989 hasta 1993 en una estación fija costera La Libertad, período en el cual se presentó un evento "El Niño" 1991-1992.
    Description: The present paper is related to "El Niño" regional Study (ERFEN), about Diatoms and Dinoflagellates density and distribution estimated in cellular counts (cel/l.), in La Libertad (2°S and 81°01'01'43W milles offshore), during 1989, 1990, 1991, 1992 and 1993, along a water column from the surface to 75 m. depth. During this time "El Niño" 1991-1992 was present. In the annual cycle 1989, 1990, 1992 and 1993 two maxime of celular count were present: one short one (november-december-january) and an other long one (april-may-jun-july-agoust) during summer time. the Diatoms were more abundant in the phytoplankton. The genera more dominant were Nitzschia, Rhizosolenia, Leptocylindrua, Hemialux and Chaetoceros. Dinoflagellates were not dominant in the water sample.
    Description: Incluye ref.bibl., ilus., grafs., tbls.
    Description: Published
    Keywords: Biomass ; Phytoplankton ; Water temperature ; Population density ; Phytoplankton ; Seasonal distribution ; Water temperature ; Oceanographic stations ; Fixed stations ; Biomass ; Population density
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  • 38
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    Procesos planctónicos en el Golfo de Guayaquil (Campo Amistad) julio-agosto/2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo es una contribución al estudio del fitoplancton y zooplancton marino-estuarino y su relación con las condiciones ambientales físico-químicas presentes en el entorno de la plataforma Amistad de producción de gas (Campo Amistad - Golfo de Guayaquil Externo), realizada por el Instituto Oceanográfico de la Armada en el B/I ORION durante julio-agosto del 2001.
    Description: This research is part of an environmental monitoring of plankton and its physical and chemical response around the platform located offshore Campo Amistad, near Santa Clara Island, southeast of the Gulf in external Guayaquil. The study was carried out between july 30 and august 31-2001, onboard the R/V Orión of te Oceanographic Institute of the Ecuadorian Navy. The chlorophyll "a" biomass presented values between 0.6 and 1.52 mg/m³ in surface waters, with averages of 1.07 to 0.99 mg/m³ (10 m), 0.79 (20 m) and 0.58 (30 m) mg/m³. The larger amounts of biomass and daily variability were found in the northern part of the platform, while the opposite trend was observed in its western area. One hundred and three phytoplankton species were identified, with dominance of centric diatoms of mainly Skeletonema costatum and Chaetoceros curvisetus. Dinoflagellates presented high diversity and low biomass; Ceratium dens was the dominant species, characterizing influences of external water masses in the estuary. The zooplankton fauna was represented by 28 groups, with dominance of cladocera and copepods; the highest density of organisms was found the 17h00 hours. High density of cladocera presented a strong positive relationship to phytoplankton abundance, and a negative correlation to copepod abundance. The environmental conditions in the surface thermal structure were almost stable, with an average of 22.5°C. The lowest temperatures were found southwest of the platform (subsurface), coincident with a slight increase in nutrients (nitrate and silicate). The marine biota associated with these environmental conditions presented high diversity, implying the absence of eutrophication incidence in the estuary area of the platform.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Biomass ; Zooplankton ; Phytoplankton ; Chlorophylls ; Environmental assessment ; Biomass ; Chlorophylls ; Nutrients (mineral) ; Zooplankton ; Phytoplankton ; Environmental assessment ; Production platforms
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  • 39
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    VLNDEF Project for Geodetic Infrastructure Definition of Northern Victoria Land, Antarctica (2008)
    Springer
    Details
    Publication Date: 2022-05-30
    Description: Scientific investigations in Antarctica are, for many different reasons, a challenging and fascinating task. Measurements, observations and field operations must be carefully planned well in advance and the capacity of successfully meeting the goals of a scientific project is often related to the capacity of forecasting and anticipating the many different potential mishaps. In order to do that, experience and logistic support are crucial. On the scientific side, the team must be aware of its tasks and be prepared to carry out observations in a hostile environment: both technology and human resources have to be suitably selected, prepared, tested and trained. On the logistic side, nations, institutions and any other organisation involved in the expeditions must ensure the proper amount of competence and practical support. The history of modern Italian Antarctic expeditions dates back to the middle 80’s when the first infrastructures of “Mario Zucchelli Station”, formerly Terra Nova Bay Station, were settled at Terra Nova Bay, Northern Victoria Land. Only a few years later, the first geodetic infrastructures were planned and built. Italian geodetic facilities and activities were, ever since, being constantly maintained and developed. Nowadays, the most remarkable geodetic infrastructures are the permanent Global Positioning System (GPS) station (TNB1) installed at Mario Zucchelli and the GPS geodetic network Victoria Land Network for DEFormation control (VLNDEF) entirely deployed on an area extending between 71° S and 76° S and 160° E and 170° E. These facilities do not only allow carrying out utmost geodetic investigations but also posses interesting capacities on the international multidisciplinary scientific scenario. In order to fully exploit their potentiality, management and maintenance of the infrastructure are crucial; nevertheless, in order to perform high quality scientific research, these abilities must be coupled with the knowledge concerning a proper use and a correct processing of the information that these infrastructures can provide. This work focuses on the different methods that can be applied to process the observations that are performed with GPS technique in Northern Victoria Land, aiming at reaching the highest accuracy of results and assuring the larger significance and versatility of the processing outcomes. Three software were used for the analysis, namely: Bernese v.5.0, Gipsy/Oasis II and Gamit/Globk. The working data sets are (i) the permanent GPS station TNB1 observations continuously performed since 1998 and (ii) the five episodic campaigns performed on the sites of VLNDEF. The two infrastructures can be regarded as neat examples of standard geodetic installation in Antarctica. Therefore, the technological solutions that were adopted and applied for establishing the GPS permanent station and the VLNDEF geodetic network as well as the data processing strategies and the data analysis procedures that were tested on their observation will be illustrated in detail. The results will be presented, compared and discussed. Furthermore, their potentials and role in geodetic research will be carefully described; their versatility will also be highlighted in the foreground of a multidisciplinary Antarctic international scientific activity.
    Description: Published
    Description: 37-72
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: reserved
    Keywords: Antarctica ; Geodesy ; Geodetic Infrastructures ; GPS ; 01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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    PAPER (OA)
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    Iceland Geodynamics - Crustal Deformation and Divergent Plate Tectonics (2006)
    Springer
    In:  Corporate, Florida, Springer, vol. Developments in Petroleum Science vol. 15B, no. Publ. No. 12, pp. 9, (3-540-24165-5, XXVI + 228 p.)
    Details
    Publication Date: 2006
    Description: This book provides a summary of geodynamic results from Iceland that presently are found in a great number of scientific articles, but have not been collected before in a book
    Keywords: Textbook of geodesy ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Geodesy ; Plate tectonics ; GeodesyY
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    BIBLIOGRAPHY SEISMOLOGY
  • 41
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    Volcano Deformation - New Geodetic Monitoring Techniques (2006)
    Springer
    In:  Cambridge, Springer, vol. LXXVIII, no. 2, pp. 125-169, (ISBN: 3-540-42642-6, Approx. 620 p. 30 illus., Hardcover)
    Details
    Publication Date: 2006
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Volcanology ; Geodesy ; Global Positioning System ; InSAR ; Textbook of geodesy
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    BIBLIOGRAPHY SEISMOLOGY
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    The Adria Microplate: Global Positioning System Geodesy, Tectonics and Hazards (2006)
    Springer
    In:  Amsterdam, 490 pp., Springer, vol. 11, no. Publ. No. 12, pp. 127, (1-4020-4233-7 (hc), 1-4020-4234-5 (sc), X + 413 p.)
    Details
    Publication Date: 2006
    Description: Tectonic motion of the Adria microplate exerts a first-order control on the tectonics, geology, seismology, resource distribution, and the geological hazards across a broad zone of south-central Europe and the north-central Mediterranean... This workshop brought together a distinguished international group of scientists working in the peri-Adriatic region to: (1) review research activities and results, (2) share technical expertise, and (3) provide a springboard for future collaborative research on Adria geodynamics. Areas of agreement were identified, as well as remaining areas of debate. In addition, attention focused on important scientific questions and the potential for international and interdisciplinary research in the future
    Keywords: Plate tectonics ; Geodesy ; Tectonics ; Earthquake hazard ; Italy ; Croatia
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    BIBLIOGRAPHY SEISMOLOGY
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