Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica)
The Antarctic Peninsula experiences a fast retreat of glaciers, which results in an increased release of particles and sedimentation and, thus, a decrease in the available photosynthetic active radiation (PAR, 400–700 nm) for benthic primary production. In this study, we investigated how changes in...
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ftdoajarticles:oai:doaj.org/article:67e450934dc24112939f24242530eff6 2023-05-15T13:59:44+02:00 Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) Ralf Hoffmann Adil Yousif Al-Handal Angela Wulff Dolores Deregibus Katharina Zacher María Liliana Quartino Frank Wenzhöfer Ulrike Braeckman 2019-10-01T00:00:00Z https://doi.org/10.3389/fmars.2019.00655 https://doaj.org/article/67e450934dc24112939f24242530eff6 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2019.00655/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00655 https://doaj.org/article/67e450934dc24112939f24242530eff6 Frontiers in Marine Science, Vol 6 (2019) Antarctic benthic diatoms effects of sedimentation environmental photosynthetic active radiation primary production efficiency Southern Ocean oxygen flux Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2019 ftdoajarticles https://doi.org/10.3389/fmars.2019.00655 2022-12-31T03:43:54Z The Antarctic Peninsula experiences a fast retreat of glaciers, which results in an increased release of particles and sedimentation and, thus, a decrease in the available photosynthetic active radiation (PAR, 400–700 nm) for benthic primary production. In this study, 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 PAR of 0–70 μmol photons m–2 s–1. Total oxygen exchange rates and microphytobenthic diatom community structure, density, and biomass were determined. Our study revealed that while the microphytobenthic diatom density and composition remained similar, the net primary production of the microphytobenthos decreased with increasing sedimentation and shading. By comparing our experimental results with in situ measured PAR intensities, we furthermore identified 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 related sedimentation and shading, with yet unknown consequences for the benthic heterotrophic community, its structure, and diversity. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Antarctic Peninsula Potter Cove Frontiers in Marine Science 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic benthic diatoms effects of sedimentation environmental photosynthetic active radiation primary production efficiency Southern Ocean oxygen flux Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Antarctic benthic diatoms effects of sedimentation environmental photosynthetic active radiation primary production efficiency Southern Ocean oxygen flux Science Q General. Including nature conservation geographical distribution QH1-199.5 Ralf Hoffmann Adil Yousif Al-Handal Angela Wulff Dolores Deregibus Katharina Zacher María Liliana Quartino Frank Wenzhöfer Ulrike Braeckman Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) |
topic_facet |
Antarctic benthic diatoms effects of sedimentation environmental photosynthetic active radiation primary production efficiency Southern Ocean oxygen flux Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The Antarctic Peninsula experiences a fast retreat of glaciers, which results in an increased release of particles and sedimentation and, thus, a decrease in the available photosynthetic active radiation (PAR, 400–700 nm) for benthic primary production. In this study, 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 PAR of 0–70 μmol photons m–2 s–1. Total oxygen exchange rates and microphytobenthic diatom community structure, density, and biomass were determined. Our study revealed that while the microphytobenthic diatom density and composition remained similar, the net primary production of the microphytobenthos decreased with increasing sedimentation and shading. By comparing our experimental results with in situ measured PAR intensities, we furthermore identified 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 related sedimentation and shading, with yet unknown consequences for the benthic heterotrophic community, its structure, and diversity. |
format |
Article in Journal/Newspaper |
author |
Ralf Hoffmann Adil Yousif Al-Handal Angela Wulff Dolores Deregibus Katharina Zacher María Liliana Quartino Frank Wenzhöfer Ulrike Braeckman |
author_facet |
Ralf Hoffmann Adil Yousif Al-Handal Angela Wulff Dolores Deregibus Katharina Zacher María Liliana Quartino Frank Wenzhöfer Ulrike Braeckman |
author_sort |
Ralf Hoffmann |
title |
Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) |
title_short |
Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) |
title_full |
Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) |
title_fullStr |
Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) |
title_full_unstemmed |
Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica) |
title_sort |
implications of glacial melt-related processes on the potential primary production of a microphytobenthic community in potter cove (antarctica) |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmars.2019.00655 https://doaj.org/article/67e450934dc24112939f24242530eff6 |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Potter Cove |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Potter Cove |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
op_source |
Frontiers in Marine Science, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2019.00655/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00655 https://doaj.org/article/67e450934dc24112939f24242530eff6 |
op_doi |
https://doi.org/10.3389/fmars.2019.00655 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
_version_ |
1766268503683235840 |