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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ftunivgent:oai:archive.ugent.be:8606812 2023-06-11T04:06:12+02:00 Spatial variability of biogeochemistry in shallow coastal benthic communities of Potter Cove (Antarctica) and the impact of a melting glacier Hoffmann, Ralf Pasotti, Francesca Vázquez, Susana Lefaible, Nene Torstensson, Anders MacCormack, Walter Wenzhöfer, Frank Braeckman, Ulrike 2018 application/pdf https://biblio.ugent.be/publication/8606812 http://hdl.handle.net/1854/LU-8606812 https://doi.org/10.1371/journal.pone.0207917 https://biblio.ugent.be/publication/8606812/file/8606877 eng eng https://biblio.ugent.be/publication/8606812 http://hdl.handle.net/1854/LU-8606812 http://dx.doi.org/10.1371/journal.pone.0207917 https://biblio.ugent.be/publication/8606812/file/8606877 No license (in copyright) info:eu-repo/semantics/openAccess PLOS ONE ISSN: 1932-6203 Biology and Life Sciences Earth and Environmental Sciences KING-GEORGE-ISLAND SEA-ICE MARINE SEDIMENT WATER CARBON DYNAMICS BACTERIA SHELF MICROSENSOR journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.1371/journal.pone.0207917 2023-05-10T22:36:21Z 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 Latemula elliptica, which contributed 39-69% to the total macrofauna biomass, increased with enhanced glacial melt-related influence. This is contrary to the pattern observed for the remaining macrofauna. Our results further indicated that ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Isla 25 de Mayo King George Island Sea ice Ghent University Academic Bibliography 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Antarctic isla 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) King George Island Potter Cove The Antarctic PLOS ONE 13 12 e0207917 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Earth and Environmental Sciences KING-GEORGE-ISLAND SEA-ICE MARINE SEDIMENT WATER CARBON DYNAMICS BACTERIA SHELF MICROSENSOR |
spellingShingle |
Biology and Life Sciences Earth and Environmental Sciences KING-GEORGE-ISLAND SEA-ICE MARINE SEDIMENT WATER CARBON DYNAMICS BACTERIA SHELF MICROSENSOR Hoffmann, Ralf Pasotti, Francesca Vázquez, Susana Lefaible, Nene Torstensson, Anders MacCormack, Walter 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 |
Biology and Life Sciences Earth and Environmental Sciences KING-GEORGE-ISLAND SEA-ICE MARINE SEDIMENT WATER CARBON DYNAMICS BACTERIA SHELF MICROSENSOR |
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 Latemula elliptica, which contributed 39-69% to the total macrofauna biomass, increased with enhanced glacial melt-related influence. This is contrary to the pattern observed for the remaining macrofauna. Our results further indicated that ... |
format |
Article in Journal/Newspaper |
author |
Hoffmann, Ralf Pasotti, Francesca Vázquez, Susana Lefaible, Nene Torstensson, Anders MacCormack, Walter Wenzhöfer, Frank Braeckman, Ulrike |
author_facet |
Hoffmann, Ralf Pasotti, Francesca Vázquez, Susana Lefaible, Nene Torstensson, Anders MacCormack, Walter 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 |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8606812 http://hdl.handle.net/1854/LU-8606812 https://doi.org/10.1371/journal.pone.0207917 https://biblio.ugent.be/publication/8606812/file/8606877 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-58.000,-58.000,-62.083,-62.083) |
geographic |
25 de Mayo Antarctic isla 25 de Mayo King George Island Potter Cove The Antarctic |
geographic_facet |
25 de Mayo Antarctic isla 25 de Mayo King George Island Potter Cove The Antarctic |
genre |
Antarc* Antarctic Antarctica Isla 25 de Mayo King George Island Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Isla 25 de Mayo King George Island Sea ice |
op_source |
PLOS ONE ISSN: 1932-6203 |
op_relation |
https://biblio.ugent.be/publication/8606812 http://hdl.handle.net/1854/LU-8606812 http://dx.doi.org/10.1371/journal.pone.0207917 https://biblio.ugent.be/publication/8606812/file/8606877 |
op_rights |
No license (in copyright) info:eu-repo/semantics/openAccess |
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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1768378013870718976 |