Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis
Glacier melting sediment inputs affect coastal ecosystems on the Antarctic Peninsula. In Potter Cove (South Shetland Islands, Antarctica), the shift from an “ascidian dominated” to a “mixed” assemblage has been linked to sedimentation. However, in recently described newly ice-free areas ascidians be...
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ftawi:oai:epic.awi.de:53894 2024-09-15T17:41:44+00:00 Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis Torre, L. Alurralde, G. Lagger, C. Abele, D. Schloss, I.R. Sahade, R. 2021-02-23 https://epic.awi.de/id/eprint/53894/ https://doi.org/10.1016/j.marenvres.2021.105284 https://hdl.handle.net/10013/epic.7077389b-8329-4fa0-9106-ba0ed3e98ddd unknown Elsevier Torre, L. , Alurralde, G. , Lagger, C. , Abele, D. orcid:0000-0002-5766-5017 , Schloss, I. and Sahade, R. (2021) Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis , Marine Environmental Research, 167 , p. 105284 . doi:10.1016/j.marenvres.2021.105284 <https://doi.org/10.1016/j.marenvres.2021.105284> , hdl:10013/epic.7077389b-8329-4fa0-9106-ba0ed3e98ddd EPIC3Marine Environmental Research, Elsevier, 167, pp. 105284, ISSN: 01411136 Article isiRev 2021 ftawi https://doi.org/10.1016/j.marenvres.2021.105284 2024-06-24T04:26:11Z Glacier melting sediment inputs affect coastal ecosystems on the Antarctic Peninsula. In Potter Cove (South Shetland Islands, Antarctica), the shift from an “ascidian dominated” to a “mixed” assemblage has been linked to sedimentation. However, in recently described newly ice-free areas ascidians became dominant in spite of total suspended particulate matter (TSPM) concentrations, which are the highest measured in Potter Cove. Here, we compared the gut content and energy reserve of three ascidian species at three stations under different TSPM regimes. All analysed species had a higher gut content with lower %OM at these newly areas. A theoretical relationship between the scope for growth for the targeted ascidians and TSPM explained assemblages' recorded change but failed to explain current ascidians distribution. The results may indicate the existence of a TSPM threshold that allows the spatial coexistence of alternative stable states at benthic Potter Cove system. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica South Shetland Islands Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Marine Environmental Research 167 105284 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Glacier melting sediment inputs affect coastal ecosystems on the Antarctic Peninsula. In Potter Cove (South Shetland Islands, Antarctica), the shift from an “ascidian dominated” to a “mixed” assemblage has been linked to sedimentation. However, in recently described newly ice-free areas ascidians became dominant in spite of total suspended particulate matter (TSPM) concentrations, which are the highest measured in Potter Cove. Here, we compared the gut content and energy reserve of three ascidian species at three stations under different TSPM regimes. All analysed species had a higher gut content with lower %OM at these newly areas. A theoretical relationship between the scope for growth for the targeted ascidians and TSPM explained assemblages' recorded change but failed to explain current ascidians distribution. The results may indicate the existence of a TSPM threshold that allows the spatial coexistence of alternative stable states at benthic Potter Cove system. |
format |
Article in Journal/Newspaper |
author |
Torre, L. Alurralde, G. Lagger, C. Abele, D. Schloss, I.R. Sahade, R. |
spellingShingle |
Torre, L. Alurralde, G. Lagger, C. Abele, D. Schloss, I.R. Sahade, R. Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis |
author_facet |
Torre, L. Alurralde, G. Lagger, C. Abele, D. Schloss, I.R. Sahade, R. |
author_sort |
Torre, L. |
title |
Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis |
title_short |
Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis |
title_full |
Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis |
title_fullStr |
Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis |
title_full_unstemmed |
Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis |
title_sort |
antarctic ascidians under increasing sedimentation: physiological thresholds and ecosystem hysteresis |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/53894/ https://doi.org/10.1016/j.marenvres.2021.105284 https://hdl.handle.net/10013/epic.7077389b-8329-4fa0-9106-ba0ed3e98ddd |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica South Shetland Islands |
op_source |
EPIC3Marine Environmental Research, Elsevier, 167, pp. 105284, ISSN: 01411136 |
op_relation |
Torre, L. , Alurralde, G. , Lagger, C. , Abele, D. orcid:0000-0002-5766-5017 , Schloss, I. and Sahade, R. (2021) Antarctic ascidians under increasing sedimentation: Physiological thresholds and ecosystem hysteresis , Marine Environmental Research, 167 , p. 105284 . doi:10.1016/j.marenvres.2021.105284 <https://doi.org/10.1016/j.marenvres.2021.105284> , hdl:10013/epic.7077389b-8329-4fa0-9106-ba0ed3e98ddd |
op_doi |
https://doi.org/10.1016/j.marenvres.2021.105284 |
container_title |
Marine Environmental Research |
container_volume |
167 |
container_start_page |
105284 |
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1810487987642826752 |