Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica
The Antarctic Peninsula experiences a fast retreat of glaciers, which correlates with an increased release of particles and related increased sedimentation and thus, a decrease in the available light for benthic primary production. We investigated how changes in the general sedimentation and shading...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.893276 2023-05-15T14:04:56+02:00 Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica Hoffmann, Ralf Al-Handal, Adil Yousif Wulff, Angela Hasemann, Christiane Braeckman, Ulrike Deregibus, Dolores Quartino, Maria Liliana Zacher, Katharina Holtappels, Moritz Wenzhöfer, Frank MEDIAN LATITUDE: -62.228873 * MEDIAN LONGITUDE: -58.654336 * SOUTH-BOUND LATITUDE: -62.235580 * WEST-BOUND LONGITUDE: -58.662060 * NORTH-BOUND LATITUDE: -62.225110 * EAST-BOUND LONGITUDE: -58.641750 * DATE/TIME START: 2015-01-01T00:30:00 * DATE/TIME END: 2016-12-11T00:00:00 2018-08-28 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.893276 https://doi.org/10.1594/PANGAEA.893276 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.893276 https://doi.org/10.1594/PANGAEA.893276 CC-BY-NC-SA-3.0: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY-NC-SA Supplement to: Hoffmann, Ralf; Al-Handal, Adil Yousif; Wulff, Angela; Deregibus, Dolores; Zacher, Katharina; Quartino, Maria Liliana; Wenzhöfer, Frank; Braeckman, Ulrike (2019): Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica). Frontiers in Marine Science, 6, https://doi.org/10.3389/fmars.2019.00655 Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.893276 https://doi.org/10.3389/fmars.2019.00655 2023-01-20T07:34:12Z The Antarctic Peninsula experiences a fast retreat of glaciers, which correlates with an increased release of particles and related increased sedimentation and thus, a decrease in the available light for benthic primary production. We investigated how changes in the general sedimentation and shading patterns affect the primary production by benthic microalgae, the microphytobenthos. In order to determine potential net primary production and respiration of the microphytobenthic community, sediment cores from locations exposed to different sedimentation rates and shading were exposed to photosynthetic active radiation (PAR, 400–700 nm) of 0–70 µmol photons m-2 s-1. Total oxygen fluxes and microphytobenthic diatom community structure, density, and biomass were determined. Our study revealed that the net primary production of the microphytobenthos decreased with increasing sedimentation and shading, while the microphytobenthic diatom density and composition remained similar. By comparing our experimental results with in situ measured PAR intensities, we furthermore assessed the microphytobenthic primary production as an important carbon source within Potter Cove's benthic ecosystem. We propose that the microphytobenthic contribution to the total primary production may drop drastically due to Antarctic glacial retreat and correlated sedimentation and shading, with yet unknown consequences for the benthic heterotrophic community, its structure, and diversity. Dataset Antarc* Antarctic Antarctic Peninsula Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Antarctic Peninsula Potter Cove ENVELOPE(-58.662060,-58.641750,-62.225110,-62.235580) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
The Antarctic Peninsula experiences a fast retreat of glaciers, which correlates with an increased release of particles and related increased sedimentation and thus, a decrease in the available light for benthic primary production. We investigated how changes in the general sedimentation and shading patterns affect the primary production by benthic microalgae, the microphytobenthos. In order to determine potential net primary production and respiration of the microphytobenthic community, sediment cores from locations exposed to different sedimentation rates and shading were exposed to photosynthetic active radiation (PAR, 400–700 nm) of 0–70 µmol photons m-2 s-1. Total oxygen fluxes and microphytobenthic diatom community structure, density, and biomass were determined. Our study revealed that the net primary production of the microphytobenthos decreased with increasing sedimentation and shading, while the microphytobenthic diatom density and composition remained similar. By comparing our experimental results with in situ measured PAR intensities, we furthermore assessed the microphytobenthic primary production as an important carbon source within Potter Cove's benthic ecosystem. We propose that the microphytobenthic contribution to the total primary production may drop drastically due to Antarctic glacial retreat and correlated sedimentation and shading, with yet unknown consequences for the benthic heterotrophic community, its structure, and diversity. |
format |
Dataset |
author |
Hoffmann, Ralf Al-Handal, Adil Yousif Wulff, Angela Hasemann, Christiane Braeckman, Ulrike Deregibus, Dolores Quartino, Maria Liliana Zacher, Katharina Holtappels, Moritz Wenzhöfer, Frank |
spellingShingle |
Hoffmann, Ralf Al-Handal, Adil Yousif Wulff, Angela Hasemann, Christiane Braeckman, Ulrike Deregibus, Dolores Quartino, Maria Liliana Zacher, Katharina Holtappels, Moritz Wenzhöfer, Frank Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica |
author_facet |
Hoffmann, Ralf Al-Handal, Adil Yousif Wulff, Angela Hasemann, Christiane Braeckman, Ulrike Deregibus, Dolores Quartino, Maria Liliana Zacher, Katharina Holtappels, Moritz Wenzhöfer, Frank |
author_sort |
Hoffmann, Ralf |
title |
Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica |
title_short |
Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica |
title_full |
Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica |
title_fullStr |
Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica |
title_full_unstemmed |
Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica |
title_sort |
total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in potter cove, antarctica |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.893276 https://doi.org/10.1594/PANGAEA.893276 |
op_coverage |
MEDIAN LATITUDE: -62.228873 * MEDIAN LONGITUDE: -58.654336 * SOUTH-BOUND LATITUDE: -62.235580 * WEST-BOUND LONGITUDE: -58.662060 * NORTH-BOUND LATITUDE: -62.225110 * EAST-BOUND LONGITUDE: -58.641750 * DATE/TIME START: 2015-01-01T00:30:00 * DATE/TIME END: 2016-12-11T00:00:00 |
long_lat |
ENVELOPE(-58.662060,-58.641750,-62.225110,-62.235580) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Potter Cove |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Potter Cove |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Supplement to: Hoffmann, Ralf; Al-Handal, Adil Yousif; Wulff, Angela; Deregibus, Dolores; Zacher, Katharina; Quartino, Maria Liliana; Wenzhöfer, Frank; Braeckman, Ulrike (2019): Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica). Frontiers in Marine Science, 6, https://doi.org/10.3389/fmars.2019.00655 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.893276 https://doi.org/10.1594/PANGAEA.893276 |
op_rights |
CC-BY-NC-SA-3.0: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.1594/PANGAEA.893276 https://doi.org/10.3389/fmars.2019.00655 |
_version_ |
1766276405108146176 |