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  • Community composition  (4)
  • 2005-2009  (4)
  • 1
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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
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
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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
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
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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
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 4
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    Comunidades del zooplankton en los ríos Teaone, Esmeraldas, Terminal Petrolero y el balneario Las Palmas de Esmeraldas, durante el 2004 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Los estudios del zooplancton en diferentes áreas principalmente en el río Teaone, Esmeraldas y la zona marino costera frente a la ciudad que incluye, el área del balneario Las Palmas, en el último año se ha intensificado con el objetivo de obtener un conocimiento detallado de la presencia de estos organismos y las características físico-químicas que condicionan su abundancia y distribución.
    Description: The present study was carried out during the wet and dry seasons in the rivers Teaone, Esmeraldas, Petrolero Terminal and Palmas, for which stablished that a variability exists temporary space as for the abundance and composition of the communities zooplankton, especially the species of the taxa Chaetognatha, Cladocera, Caridea. The area of major productivity zooplanctónica associated with a high diversity was in the zone of Petrolero Terminal of Esmeraldas during the wet season. In the area Petrolero Terminal there was high abundance of Quetognatos's species represented by the dominancia of S. bedoti and S. neglecta in the wet season and during the dry season the dominancia was od S. enflata and S. minim which con be related principally by the seasonal variation of the parameter salinity, whereas the temperature was kept in a range of 25.9° to 28.4 °C during 2 season in study. The low zooplankton abundance and diversity registered in the river Teaone, there being registered the presence of scanty specimens of Macrobranchium rathbunae in the wet season. In the river Teaone were observed high values of potential of hydrogen in comparison with other areas in study, for what, it might catalogue that this area is in conditions of a deterioration of the quality of the waters, by light indications towards a pollution product of the antropogénica activities.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Description: freshwater environment
    Keywords: Zooplankton ; Biological production ; Water quality ; Salinity ; Hydrogen ; Species diversity ; Community composition ; Zooplankton ; Biological production ; Salinity ; Hydrogen ; Water quality ; Temporal variations ; Species diversity
    Repository Name: AquaDocs
    Type: Journal Contribution
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