Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year.
The rapid increase in atmospheric temperature detected in the last decades in the Western Antarctic Peninsula was accompanied by a strong glacier retreat and an increase in production of melting water, as well as changes in the sea-ice dynamic. The objective of this study was to analyze the successi...
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ftdoajarticles:oai:doaj.org/article:e2c696bd0d9f4422943ccfdad175a3c0 2023-05-15T13:47:56+02:00 Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. Maximiliano D Garcia M Sofia Dutto Carlo J Chazarreta Anabela A Berasategui Irene R Schloss Mónica S Hoffmeyer 2020-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0232614 https://doaj.org/article/e2c696bd0d9f4422943ccfdad175a3c0 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0232614 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0232614 https://doaj.org/article/e2c696bd0d9f4422943ccfdad175a3c0 PLoS ONE, Vol 15, Iss 5, p e0232614 (2020) Medicine R Science Q article 2020 ftdoajarticles https://doi.org/10.1371/journal.pone.0232614 2022-12-31T05:56:13Z The rapid increase in atmospheric temperature detected in the last decades in the Western Antarctic Peninsula was accompanied by a strong glacier retreat and an increase in production of melting water, as well as changes in the sea-ice dynamic. The objective of this study was to analyze the succession of micro- and mesozooplankton during a warm annual cycle (December 2010-December 2011) in an Antarctic coastal environment (Potter Cove). The biomass of zooplankton body size classes was used to predict predator-prey size relationships (i.e., to test bottom-up/top-down control effects) using a Multiple Linear Regression Analysis. The micro- and mesozooplanktonic successions were graphically analyzed to detect the influence of environmental periods (defined by the degree of glacial melting, sea-ice freezing and sea-ice melting) on coupling/uncoupling planktonic biomass curves associated to possible predator-prey size relationship scenarios. At the beginning of the glacial melting, medium and large mesozooplankton (calanoid copepods, Euphausia superba, and Salpa thompsoni) exert a top-down control on Chl-a and microzooplankton. Stratification of the water column benefitted the availability of adequate food-size (Chl-a <20) for large microzooplankton (tintinnids) development observed during fall. High abundance of omnivores mesozooplankton (Oithona similis and furcilia of E. superba) during sea-ice freezing periods would be due to the presence of available heterotrophic food under or within the sea ice. Finally, the increase in microzooplankton abundance in the middle of spring, when sea-ice melting starts, corresponded to small and medium dinoflagellates and ciliates species, which were possibly part of the biota of sea ice. If glacier retreat continues and the duration and thickness of the sea ice layer fluctuates as predicted by climate models, our results predict a future scenario regarding the zooplankton succession in Antarctic coastal environments. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Euphausia superba Sea ice Copepods Directory of Open Access Journals: DOAJ Articles Antarctic Antarctic Peninsula Potter Cove PLOS ONE 15 5 e0232614 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Maximiliano D Garcia M Sofia Dutto Carlo J Chazarreta Anabela A Berasategui Irene R Schloss Mónica S Hoffmeyer Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. |
topic_facet |
Medicine R Science Q |
description |
The rapid increase in atmospheric temperature detected in the last decades in the Western Antarctic Peninsula was accompanied by a strong glacier retreat and an increase in production of melting water, as well as changes in the sea-ice dynamic. The objective of this study was to analyze the succession of micro- and mesozooplankton during a warm annual cycle (December 2010-December 2011) in an Antarctic coastal environment (Potter Cove). The biomass of zooplankton body size classes was used to predict predator-prey size relationships (i.e., to test bottom-up/top-down control effects) using a Multiple Linear Regression Analysis. The micro- and mesozooplanktonic successions were graphically analyzed to detect the influence of environmental periods (defined by the degree of glacial melting, sea-ice freezing and sea-ice melting) on coupling/uncoupling planktonic biomass curves associated to possible predator-prey size relationship scenarios. At the beginning of the glacial melting, medium and large mesozooplankton (calanoid copepods, Euphausia superba, and Salpa thompsoni) exert a top-down control on Chl-a and microzooplankton. Stratification of the water column benefitted the availability of adequate food-size (Chl-a <20) for large microzooplankton (tintinnids) development observed during fall. High abundance of omnivores mesozooplankton (Oithona similis and furcilia of E. superba) during sea-ice freezing periods would be due to the presence of available heterotrophic food under or within the sea ice. Finally, the increase in microzooplankton abundance in the middle of spring, when sea-ice melting starts, corresponded to small and medium dinoflagellates and ciliates species, which were possibly part of the biota of sea ice. If glacier retreat continues and the duration and thickness of the sea ice layer fluctuates as predicted by climate models, our results predict a future scenario regarding the zooplankton succession in Antarctic coastal environments. |
format |
Article in Journal/Newspaper |
author |
Maximiliano D Garcia M Sofia Dutto Carlo J Chazarreta Anabela A Berasategui Irene R Schloss Mónica S Hoffmeyer |
author_facet |
Maximiliano D Garcia M Sofia Dutto Carlo J Chazarreta Anabela A Berasategui Irene R Schloss Mónica S Hoffmeyer |
author_sort |
Maximiliano D Garcia |
title |
Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. |
title_short |
Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. |
title_full |
Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. |
title_fullStr |
Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. |
title_full_unstemmed |
Micro- and mesozooplankton successions in an Antarctic coastal environment during a warm year. |
title_sort |
micro- and mesozooplankton successions in an antarctic coastal environment during a warm year. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2020 |
url |
https://doi.org/10.1371/journal.pone.0232614 https://doaj.org/article/e2c696bd0d9f4422943ccfdad175a3c0 |
geographic |
Antarctic Antarctic Peninsula Potter Cove |
geographic_facet |
Antarctic Antarctic Peninsula Potter Cove |
genre |
Antarc* Antarctic Antarctic Peninsula Euphausia superba Sea ice Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Euphausia superba Sea ice Copepods |
op_source |
PLoS ONE, Vol 15, Iss 5, p e0232614 (2020) |
op_relation |
https://doi.org/10.1371/journal.pone.0232614 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0232614 https://doaj.org/article/e2c696bd0d9f4422943ccfdad175a3c0 |
op_doi |
https://doi.org/10.1371/journal.pone.0232614 |
container_title |
PLOS ONE |
container_volume |
15 |
container_issue |
5 |
container_start_page |
e0232614 |
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1766248024274632704 |