Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier
Measurements of biogeochemical fluxes at the sediment–water interface are essential to investigate organic matter mineralization processes but are rarely performed in shallow coastal areas of the Antarctic. We investigated biogeochemical fluxes across the sediment–water interface in Potter Cove (Kin...
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ftconicet:oai:ri.conicet.gov.ar:11336/96116 2023-10-09T21:47:13+02:00 Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier Hoffmann, Ralf Passoti, Francesca Vázquez, Susana Claudia Lefaible, Nene Torstensson, Anders Mac Cormack, Walter Patricio Wenzhöfer, Frank Braeckman, Ulrike application/pdf http://hdl.handle.net/11336/96116 eng eng Public Library of Science info:eu-repo/semantics/altIdentifier/url/https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0207917 info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0207917 http://hdl.handle.net/11336/96116 Hoffmann, Ralf; Passoti, Francesca; Vázquez, Susana Claudia; Lefaible, Nene; Torstensson, Anders; et al.; Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier; Public Library of Science; Plos One; 13; 12; 12-2018; 1-22 1932-6203 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ BIOGEOCHEMICAL FLUXES BIOGENIC SEDIMENT COMPOUNDS LATERNULA ELLIPTICA BENTHIC COMMUNITIES https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1371/journal.pone.0207917 2023-09-24T18:26:29Z Measurements of biogeochemical fluxes at the sediment–water interface are essential to investigate organic matter mineralization processes but are rarely performed in shallow coastal areas of the Antarctic. We investigated biogeochemical fluxes across the sediment–water interface in Potter Cove (King George Island/Isla 25 de Mayo) at water depths between 6–9 m. Total fluxes of oxygen and inorganic nutrients were quantified in situ. Diffusive oxygen fluxes were also quantified in situ, while diffusive inorganic nutrient fluxes were calculated from pore water profiles. Biogenic sediment compounds (concentration of pigments, total organic and inorganic carbon and total nitrogen), and benthic prokaryotic, meio-, and macrofauna density and biomass were determined along with abiotic parameters (sediment granulometry and porosity). The measurements were performed at three locations in Potter Cove, which differ in terms of sedimentary influence due to glacial melt. In this study, we aim to assess secondary effects of glacial melting such as ice scouring and particle release on the benthic community and the biogeochemical cycles they mediate. Furthermore, we discuss small-scale spatial variability of biogeochemical fluxes in shallow water depth and the required food supply to cover the carbon demand of Potter Cove’s shallow benthic communities. We found enhanced mineralization in soft sediments at one location intermediately affected by glacial melt-related effects, while a reduced mineralization was observed at a location influenced by glacial melting. The benthic macrofauna assemblage constituted the major benthic carbon stock (>87% of total benthic biomass) and was responsible for most benthic organic matter mineralization. However, biomass of the dominant Antarctic bivalve Laternula elliptica, which contributed 39–69% to the total macrofauna. Fil: Hoffmann, Ralf. Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung; Alemania Fil: Passoti, Francesca. University of Ghent; Bélgica Fil: ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Isla 25 de Mayo King George Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic King George Island Potter Cove 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) isla 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) PLOS ONE 13 12 e0207917 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
BIOGEOCHEMICAL FLUXES BIOGENIC SEDIMENT COMPOUNDS LATERNULA ELLIPTICA BENTHIC COMMUNITIES https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
BIOGEOCHEMICAL FLUXES BIOGENIC SEDIMENT COMPOUNDS LATERNULA ELLIPTICA BENTHIC COMMUNITIES https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Hoffmann, Ralf Passoti, Francesca Vázquez, Susana Claudia Lefaible, Nene Torstensson, Anders Mac Cormack, Walter Patricio Wenzhöfer, Frank Braeckman, Ulrike Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier |
topic_facet |
BIOGEOCHEMICAL FLUXES BIOGENIC SEDIMENT COMPOUNDS LATERNULA ELLIPTICA BENTHIC COMMUNITIES https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Measurements of biogeochemical fluxes at the sediment–water interface are essential to investigate organic matter mineralization processes but are rarely performed in shallow coastal areas of the Antarctic. We investigated biogeochemical fluxes across the sediment–water interface in Potter Cove (King George Island/Isla 25 de Mayo) at water depths between 6–9 m. Total fluxes of oxygen and inorganic nutrients were quantified in situ. Diffusive oxygen fluxes were also quantified in situ, while diffusive inorganic nutrient fluxes were calculated from pore water profiles. Biogenic sediment compounds (concentration of pigments, total organic and inorganic carbon and total nitrogen), and benthic prokaryotic, meio-, and macrofauna density and biomass were determined along with abiotic parameters (sediment granulometry and porosity). The measurements were performed at three locations in Potter Cove, which differ in terms of sedimentary influence due to glacial melt. In this study, we aim to assess secondary effects of glacial melting such as ice scouring and particle release on the benthic community and the biogeochemical cycles they mediate. Furthermore, we discuss small-scale spatial variability of biogeochemical fluxes in shallow water depth and the required food supply to cover the carbon demand of Potter Cove’s shallow benthic communities. We found enhanced mineralization in soft sediments at one location intermediately affected by glacial melt-related effects, while a reduced mineralization was observed at a location influenced by glacial melting. The benthic macrofauna assemblage constituted the major benthic carbon stock (>87% of total benthic biomass) and was responsible for most benthic organic matter mineralization. However, biomass of the dominant Antarctic bivalve Laternula elliptica, which contributed 39–69% to the total macrofauna. Fil: Hoffmann, Ralf. Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung; Alemania Fil: Passoti, Francesca. University of Ghent; Bélgica Fil: ... |
format |
Article in Journal/Newspaper |
author |
Hoffmann, Ralf Passoti, Francesca Vázquez, Susana Claudia Lefaible, Nene Torstensson, Anders Mac Cormack, Walter Patricio Wenzhöfer, Frank Braeckman, Ulrike |
author_facet |
Hoffmann, Ralf Passoti, Francesca Vázquez, Susana Claudia Lefaible, Nene Torstensson, Anders Mac Cormack, Walter Patricio Wenzhöfer, Frank Braeckman, Ulrike |
author_sort |
Hoffmann, Ralf |
title |
Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier |
title_short |
Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier |
title_full |
Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier |
title_fullStr |
Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier |
title_full_unstemmed |
Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier |
title_sort |
spatial variability of biogeochemistry in shallow coastal benthic communities of potter cove (antarctica) and the impact of a melting glacier |
publisher |
Public Library of Science |
url |
http://hdl.handle.net/11336/96116 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-58.000,-58.000,-62.083,-62.083) |
geographic |
Antarctic The Antarctic King George Island Potter Cove 25 de Mayo isla 25 de Mayo |
geographic_facet |
Antarctic The Antarctic King George Island Potter Cove 25 de Mayo isla 25 de Mayo |
genre |
Antarc* Antarctic Antarctica Isla 25 de Mayo King George Island |
genre_facet |
Antarc* Antarctic Antarctica Isla 25 de Mayo King George Island |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0207917 info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0207917 http://hdl.handle.net/11336/96116 Hoffmann, Ralf; Passoti, Francesca; Vázquez, Susana Claudia; Lefaible, Nene; Torstensson, Anders; et al.; Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier; Public Library of Science; Plos One; 13; 12; 12-2018; 1-22 1932-6203 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
op_doi |
https://doi.org/10.1371/journal.pone.0207917 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
12 |
container_start_page |
e0207917 |
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1779310144644972544 |