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  • 2020-2024  (36)
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  • 1
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    Planktonic Foraminifera assemblages from sediment core SIS-188 (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-07
    Description: Planktonic Foraminifera assemblages register the several climate changes that occurred during the Quaternary. These assemblage variations (frequently abundance reversals) are used to establish bioecozones. Since climate changes are neither synchronic nor spatially homogenous, the purpose is to assess the applicability of the bioecozonations proposed for the Santos and Campos basins in the northern portion of the Pelotas Basin (South Brazilian Continental Margin). The studied grain size was 〉0.150 mm.
    Keywords: Beella digitata; Candeina nitida; Counting, foraminifera, planktic; DEPTH, sediment/rock; Foraminifera, planktic indeterminata; Globigerina bulloides; Globigerina falconensis; Globigerinella calida; Globigerinella siphonifera; Globigerinita glutinata; Globigerinoides conglobatus; Globigerinoides ruber pink; Globigerinoides ruber white; Globigerinoides tenellus; Globoconella inflata; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia menardii; Globorotalia scitula; Globorotalia truncatulinoides dextral; Globorotalia truncatulinoides sinistral; Globorotalia tumida; Globoturborotalita rubescens; Late Quaternary; Neogloboquadrina dutertrei; Neogloboquadrina incompta; Neogloboquadrina pachyderma; Orbulina universa; PC; Piston corer; Planktonic foraminifera; Pulleniatina obliquiloculata; Sample ID; SIS-188; Trilobatus sacculifer; Trilobatus trilobus; Turborotalita quinqueloba; western South Atlantic
    Type: Dataset
    Format: text/tab-separated-values, 690 data points
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    DATA PANGAEA
  • 2
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    Time series of hydrographic, chemical and primary production variables for a shelf station off A Coruña (NW Spain): 2017-2018 (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: Water column discrete observations of temperature, salinity, density, irradiance, dissolved nutrients (nitrate, nitrite, phosphate, ammonium, silicate), oxygen, chlorophyll-a, primary production (carbon uptake) rates, and particulate organic carbon and nitrogen from samples collected monthly at a shelf station off A Coruña (NW Spain) between 2017 and 2018. These series are part of the long-term observational project RADIALES (Instituto Español de Oceanografía, IEO, Spain).
    Keywords: Adaptação Costeira às alterações climáticas: conhecer os riscos e aumentar a resiliência; Ammonium; Bottle, Niskin; Carbon, organic, particulate; Carbon/Nitrogen ratio; Chlorophyll a; Colorimetry, flow-segmented (Grasshoff et al. 1983); CTD, Sea-Bird, SBE 25 SEALOGGER; DATE/TIME; Density, sigma-theta (0); DEPTH, water; E2CO; Galicia Margin; MarRisk; NE Atlantic; NIS; Nitrate; Nitrite; Nitrogen, organic, particulate; nutrients; NW Spain; Oxygen; Oxygen saturation; Phosphate; primary production; Primary production of carbon per hour; RADIALES; Radiation, photosynthetically active; Salinity; seRies temporAles De oceanografIA en eL norte de ESpaña; Silicate; Temperature; Temperature, water; Upwelling; Winkler titration (Parsons et al. 1984)
    Type: Dataset
    Format: text/tab-separated-values, 2499 data points
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    DATA PANGAEA
  • 3
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    País de Mares No. 12 (2023)
    Dirección General Marítima | Bogotá D.C., Colombia
    Details
    Publication Date: 2023-03-09
    Description: Contenido - Editorial - Mujeres Dimar hacen historia en los mares, ríos y puertos de Colombia - Mujeres Dimar hacen historia en los mares, ríos y puertos de Colombia - El futuro marítimo de La Guajira - Aspectos generales acerca de las funciones jurisdiccionales de la Autoridad Marítima Colombiana - Agenda Dimar - Identificación de especies de fitoplancton en el Pacífico colombiano: una labor trascendental para la toma de decisiones relacionada con la contaminación biológica generada por buques - Colombia comprometida con la protección del medio ambiente antártico - Importancia del mantenimiento en los buques basado en la implementación del Reglamento Nacional sobre Gestión para la Seguridad Operacional de Naves y la Prevención de la Contaminación - Dimar en Imágenes - Las ballenas jorobadas nos visitan desde la Antártida - Seguimiento satelital de bosque de manglar: oportunidades para la gestión y conservación del Pacífico colombiano - Ordenamiento espacial marino-costero de las playas del Distrito de Cartagena - Gestión del agua de lastre: implementación de la evaluación del riesgo de introducción de especies - Integración sostenible con la comunidad: la clave del éxito de la gestión integral de las zonas costeras - Sabanilla y Country, Puerto Colombia, playas modelo con proyección internacional - Representaciones del mar en la publicidad - Reseña histórica del Centro Colombiano de Datos Oceanográficos - #LéxicoDelMar
    Description: Published
    Description: Non Refereed
    Keywords: Investigación científica ; Puertos ; Seguridad en la navegación ; Hidrocarburos ; Río ; Buque ; Contaminación Marina ; Litorales ; ASFA_2015::S::Scientific research ; ASFA_2015::C::Coastal zone ; ASFA_2015::E::Environmental contamination ; ASFA_2015::L::Littoral zone ; ASFA_2015::C::Cultures ; ASFA_2015::S::Safety ; ASFA_2015::V::Vessels
    Repository Name: AquaDocs
    Type: Book/Monograph/Conference Proceedings
    Format: 80pp.
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  • 4
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    Geography and ecology shape the phylogenetic composition of Amazonian tree communities (2024)
    Wiley
    In:  Journal of Biogeography vol. 2024 no. 14816
    Details
    Publication Date: 2024-03-31
    Description: Aim: Amazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated with either geographic regions or edaphic forest types. Location: Amazonia. Taxon: Angiosperms (Magnoliids; Monocots; Eudicots). Methods: Data for the abundance of 5082 tree species in 1989 plots were combined with a mega-phylogeny. We applied evolutionary ordination to assess how phylogenetic composition varies across Amazonia. We used variation partitioning and Moran's eigenvector maps (MEM) to test and quantify the separate and joint contributions of spatial and environmental variables to explain the phylogenetic composition of plots. We tested the indicator value of lineages for geographic regions and edaphic forest types and mapped associations onto the phylogeny. Results: In the terra firme and várzea forest types, the phylogenetic composition varies by geographic region, but the igapó and white-sand forest types retain a unique evolutionary signature regardless of region. Overall, we find that soil chemistry, climate and topography explain 24% of the variation in phylogenetic composition, with 79% of that variation being spatially structured (R2= 19% overall for combined spatial/environmental effects). The phylogenetic composition also shows substantial spatial patterns not related to the environmental variables we quantified (R2= 28%). A greater number of lineages were significant indicators of geographic regions than forest types. Main Conclusion: Numerous tree lineages, including some ancient ones (〉66 Ma), show strong associations with geographic regions and edaphic forest types of Amazonia. This shows that specialization in specific edaphic environments has played a long-standing role in the evolutionary assembly of Amazonian forests. Furthermore, many lineages, even those that have dispersed across Amazonia, dominate within a specific region, likely because of phylogenetically conserved niches for environmental conditions that are prevalent within regions.
    Keywords: community assembly ; dispersal limitation ; environmental selection ; evolutionary principal ; component analysis ; indicator lineage analysis ; Moran's eigenvector maps ; neotropics ; Niche ; conservatism ; tropical rain forests
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
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    Excess degassing drives long-term volcanic unrest at Nevado del Ruiz (2024)
    Nature PG
    Details
    Publication Date: 2024-04-08
    Description: This study combines volcanic gas compositions, SO2 flux and satellite thermal data collected at Nevado del Ruiz between 2018 and 2021. We find the Nevado del Ruiz plume to have exhibited relatively steady, high CO2 compositions (avg. CO2/ST ratios of 5.4 ± 1.9) throughout. Our degassing models support that the CO2/ST ratio variability derives from volatile exsolution from andesitic magma stored in the 1-4 km depth range. Separate ascent of CO2-rich gas bubbles through shallow (〈 1 km depth), viscous, conduit resident magma causes the observed excess degassing. We infer that degassing of ~ 974 mm3 of shallow (1-4 km) stored magma has sourced the elevated SO2 degassing recorded during 2018-2021 (average flux ~ 1548 t/d). Of this, only 〈 1 mm3 of magma have been erupted through dome extrusion, highlighting a large imbalance between erupted and degassed magma. Escalating deep CO2 gas flushing, combined with the disruption of passive degassing, through sudden accumulation and pressurization of bubbles due to lithostatic pressure, may accelerate volcanic unrest and eventually lead to a major eruption.
    Description: Published
    Description: 1230
    Description: OSV1: Verso la previsione dei fenomeni vulcanici pericolosi
    Description: JCR Journal
    Keywords: 04.08. Volcanology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
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    One sixth of Amazonian tree diversity is dependent on river floodplains (2024)
    In:  Nature Ecology & Evolution vol. 2024
    Details
    Publication Date: 2024-04-05
    Description: Amazonia’s floodplain system is the largest and most biodiverse on Earth. Although forests are crucial to the ecological integrity of floodplains, our understanding of their species composition and how this may differ from surrounding forest types is still far too limited, particularly as changing inundation regimes begin to reshape floodplain tree communities and the critical ecosystem functions they underpin. Here we address this gap by taking a spatially explicit look at Amazonia-wide patterns of tree-species turnover and ecological specialization of the region’s floodplain forests. We show that the majority of Amazonian tree species can inhabit floodplains, and about a sixth of Amazonian tree diversity is ecologically specialized on floodplains. The degree of specialization in floodplain communities is driven by regional flood patterns, with the most compositionally differentiated floodplain forests located centrally within the fluvial network and contingent on the most extraordinary flood magnitudes regionally. Our results provide a spatially explicit view of ecological specialization of floodplain forest communities and expose the need for whole-basin hydrological integrity to protect the Amazon’s tree diversity and its function.
    Keywords: Forests
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 7
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    Consistent patterns of common species across tropical tree communities (2024)
    In:  Nature vol. 625 no. 7996, pp. 728-734
    Details
    Publication Date: 2024-04-13
    Description: Trees structure the Earth's most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we investigate abundance patterns of common tree species using inventory data on 1,003,805 trees with trunk diameters of at least 10 cm across 1,568 locations1-6 in closed-canopy, structurally intact old-growth tropical forests in Africa, Amazonia and Southeast Asia. We estimate that 2.2%, 2.2% and 2.3% of species comprise 50% of the tropical trees in these regions, respectively. Extrapolating across all closed-canopy tropical forests, we estimate that just 1,053 species comprise half of Earth's 800 billion tropical trees with trunk diameters of at least 10 cm. Despite differing biogeographic, climatic and anthropogenic histories7, we find notably consistent patterns of common species and species abundance distributions across the continents. This suggests that fundamental mechanisms of tree community assembly may apply to all tropical forests. Resampling analyses show that the most common species are likely to belong to a manageable list of known species, enabling targeted efforts to understand their ecology. Although they do not detract from the importance of rare species, our results open new opportunities to understand the world's most diverse forests, including modelling their response to environmental change, by focusing on the common species that constitute the majority of their trees.
    Keywords: Multidisciplinary ; ABUNDANCE DISTRIBUTIONS ; ALPHA-DIVERSITY ; PLANT DIVERSITY ; FORESTS ; BIOMASS
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 8
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    Spectrophotometric Measurement of Carbonate Ion in Seawater over a Decade: Dealing with Inconsistencies (2022)
    ACS
    Details
    Publication Date: 2024-02-07
    Description: The spectrophotometric methodology for carbonate ion determination in seawater was first published in 2008 and has been continuously evolving in terms of reagents and formulations. Although being fast, relatively simple, affordable, and potentially easy to implement in different platforms and facilities for discrete and autonomous observations, its use is not widespread in the ocean acidification community. This study uses a merged overdetermined CO2 system data set (carbonate ion, pH, and alkalinity) obtained from 2009 to 2020 to assess the differences among the five current approaches of the methodology through an internal consistency analysis and discussing the sources of uncertainty. Overall, the results show that none of the approaches meet the climate goal (+/- 1 % standard uncertainty) for ocean acidification studies for the whole carbonate ion content range in this study but usually fulfill the weather goal (+/- 10 % standard uncertainty). The inconsistencies observed among approaches compromise the consistency of data sets among regions and through time, highlighting the need for a validated standard operating procedure for spectrophotometric carbonate ion measurements as already available for the other measurable CO2 variables.
    Type: Article , PeerReviewed
    Format: text
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  • 9
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    Antibiotics in the marine environment: occurrence and impact (2023)
    Elsevier
    Details
    Publication Date: 2024-02-26
    Description: An increasing number of monitoring studies have confirmed the occurrence of antibiotic residues in the marine environment. Antibiotics have mostly been detected in coastal waters, but also in marine sediments and a diversity of aquatic organisms, raising concern on potential risks to the environment and human health. This chapter critically discusses antibiotic sources and prevalence in marine ecosystems, as well as potential adverse impacts on aquatic life. Current methodologies for the wide-scope analysis of antibiotics in the environment, alongside with novel ecotoxicological approaches, are also tackled. Lastly, a particular focus was given to the related emergence of antibiotic resistant bacteria in the marine environment and their implications for public health, as well as future trends and strategies for the mitigation of antibiotic pollution and effects.
    Type: Book chapter , PeerReviewed
    Format: text
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  • 10
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    Sensitivity of a widespread groundwater copepod to different contaminants (2021)
    Elsevier
    Details
    Publication Date: 2021-07-01
    Print ISSN: 0045-6535
    Electronic ISSN: 1879-1298
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Elsevier
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    PAPER CURRENT
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