Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica
Author Posting. © Inter-Research, 2009. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Aquatic Microbial Ecology 54 (2009): 269-277, doi:10.3354/ame01276. Mixotrophic nanoflagellates (MNF) were quantified...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4537 2023-05-15T13:53:14+02:00 Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica Moorthi, Stefanie D. Caron, David A. Gast, Rebecca J. Sanders, Robert W. 2009-03-04 application/pdf https://hdl.handle.net/1912/4537 en eng Inter-Research https://doi.org/10.3354/ame01276 Aquatic Microbial Ecology 54 (2009): 269-277 https://hdl.handle.net/1912/4537 doi:10.3354/ame01276 Aquatic Microbial Ecology 54 (2009): 269-277 doi:10.3354/ame01276 Ross Sea Antarctica Mixotrophy Mixotrophic nanoflagellates Bacterivory Plankton Sea ice Fluorescently labeled bacteria Article 2009 ftwhoas https://doi.org/10.3354/ame01276 2022-05-28T22:58:20Z Author Posting. © Inter-Research, 2009. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Aquatic Microbial Ecology 54 (2009): 269-277, doi:10.3354/ame01276. Mixotrophic nanoflagellates (MNF) were quantified in plankton and sea ice of the Ross Sea, Antarctica, during austral spring. Tracer experiments using fluorescently labeled bacteria (FLB) were conducted to enumerate MNF and determine their contribution to total chloroplastidic and total bacterivorous nanoflagellates. Absolute abundances of MNF were typically <200 ml–1 in plankton assemblages south of the Polar Front, but they comprised 8 to 42% and 3 to 25% of bacterivorous nanoflagellates in the water column and ice cores, respectively. Moreover, they represented up to 10% of all chloroplastidic nanoflagellates in the water column when the prymnesiophyte Phaeocystis antarctica was blooming (up to 23% if P. antarctica, which did not ingest FLB, was excluded from calculations). In ice cores, MNF comprised 5 to 10% of chloroplastidic nanoflagellates. The highest proportions of MNF were found in some surface water samples and in plankton assemblages beneath ice, suggesting a potentially large effect as bacterial grazers in those locations. This study is the first to report abundances and distributions of mixotrophic flagellates in the Southern Ocean. The presence of MNF in every ice and water sample examined suggests that mixotrophy is an important alternative dietary strategy in this region. This work was supported by NSF grant OPP-0125833 to D.A.C. and R.J.G. Article in Journal/Newspaper Antarc* Antarctica Ross Sea Sea ice Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Austral Ross Sea Southern Ocean Aquatic Microbial Ecology 54 269 277 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Ross Sea Antarctica Mixotrophy Mixotrophic nanoflagellates Bacterivory Plankton Sea ice Fluorescently labeled bacteria |
spellingShingle |
Ross Sea Antarctica Mixotrophy Mixotrophic nanoflagellates Bacterivory Plankton Sea ice Fluorescently labeled bacteria Moorthi, Stefanie D. Caron, David A. Gast, Rebecca J. Sanders, Robert W. Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica |
topic_facet |
Ross Sea Antarctica Mixotrophy Mixotrophic nanoflagellates Bacterivory Plankton Sea ice Fluorescently labeled bacteria |
description |
Author Posting. © Inter-Research, 2009. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Aquatic Microbial Ecology 54 (2009): 269-277, doi:10.3354/ame01276. Mixotrophic nanoflagellates (MNF) were quantified in plankton and sea ice of the Ross Sea, Antarctica, during austral spring. Tracer experiments using fluorescently labeled bacteria (FLB) were conducted to enumerate MNF and determine their contribution to total chloroplastidic and total bacterivorous nanoflagellates. Absolute abundances of MNF were typically <200 ml–1 in plankton assemblages south of the Polar Front, but they comprised 8 to 42% and 3 to 25% of bacterivorous nanoflagellates in the water column and ice cores, respectively. Moreover, they represented up to 10% of all chloroplastidic nanoflagellates in the water column when the prymnesiophyte Phaeocystis antarctica was blooming (up to 23% if P. antarctica, which did not ingest FLB, was excluded from calculations). In ice cores, MNF comprised 5 to 10% of chloroplastidic nanoflagellates. The highest proportions of MNF were found in some surface water samples and in plankton assemblages beneath ice, suggesting a potentially large effect as bacterial grazers in those locations. This study is the first to report abundances and distributions of mixotrophic flagellates in the Southern Ocean. The presence of MNF in every ice and water sample examined suggests that mixotrophy is an important alternative dietary strategy in this region. This work was supported by NSF grant OPP-0125833 to D.A.C. and R.J.G. |
format |
Article in Journal/Newspaper |
author |
Moorthi, Stefanie D. Caron, David A. Gast, Rebecca J. Sanders, Robert W. |
author_facet |
Moorthi, Stefanie D. Caron, David A. Gast, Rebecca J. Sanders, Robert W. |
author_sort |
Moorthi, Stefanie D. |
title |
Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica |
title_short |
Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica |
title_full |
Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica |
title_fullStr |
Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica |
title_full_unstemmed |
Mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the Ross Sea, Antarctica |
title_sort |
mixotrophy : a widespread and important ecological strategy for planktonic and sea-ice nanoflagellates in the ross sea, antarctica |
publisher |
Inter-Research |
publishDate |
2009 |
url |
https://hdl.handle.net/1912/4537 |
geographic |
Austral Ross Sea Southern Ocean |
geographic_facet |
Austral Ross Sea Southern Ocean |
genre |
Antarc* Antarctica Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctica Ross Sea Sea ice Southern Ocean |
op_source |
Aquatic Microbial Ecology 54 (2009): 269-277 doi:10.3354/ame01276 |
op_relation |
https://doi.org/10.3354/ame01276 Aquatic Microbial Ecology 54 (2009): 269-277 https://hdl.handle.net/1912/4537 doi:10.3354/ame01276 |
op_doi |
https://doi.org/10.3354/ame01276 |
container_title |
Aquatic Microbial Ecology |
container_volume |
54 |
container_start_page |
269 |
op_container_end_page |
277 |
_version_ |
1766258233572327424 |