Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory
Astrammina rara, Crithionina delacai, and Notodendrodes hyalinosphaira are 3 of the largest and most abundant members of the foraminiferal assemblage at a shallow-water (28 to 32 m) site in Explorers Cove, Antarctica. This study summarizes observations from 2 decades of research, during which we emp...
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ftnerc:oai:nora.nerc.ac.uk:11631 2023-05-15T13:45:10+02:00 Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory Suhr, Stephanie B. Alexander, Stephen P. Gooday, Andrew J. Pond, David W. Bowser, Samuel S. 2008 text http://nora.nerc.ac.uk/id/eprint/11631/ https://nora.nerc.ac.uk/id/eprint/11631/1/m371p155.pdf http://www.int-res.com/articles/meps_oa/m371p155.pdf en eng Inter-Research https://nora.nerc.ac.uk/id/eprint/11631/1/m371p155.pdf Suhr, Stephanie B.; Alexander, Stephen P.; Gooday, Andrew J. orcid:0000-0002-5661-7371 Pond, David W.; Bowser, Samuel S. 2008 Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory. Marine Ecology Progress Series, 371. 155-164. https://doi.org/10.3354/meps07693 <https://doi.org/10.3354/meps07693> Marine Sciences Biology and Microbiology Ecology and Environment Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.3354/meps07693 2023-02-04T19:27:30Z Astrammina rara, Crithionina delacai, and Notodendrodes hyalinosphaira are 3 of the largest and most abundant members of the foraminiferal assemblage at a shallow-water (28 to 32 m) site in Explorers Cove, Antarctica. This study summarizes observations from 2 decades of research, during which we employed laboratory-based feeding experiments and fatty acid biomarker analysis to characterize trophic dynamics and ecological roles of the 3 species, In feeding experiments, A. rara consumed a variety of co-occurring metazoans (several Crustacea, Mollusca, Echinodermata, and a Nephtys species). C. delacai, N. hyalinosphaira, and a number of other foraminiferal species from Explorers Cove successfully trapped Artemia sp. nauplius prey in a setup designed to examine the efficiency of prey capture. Fatty acid analyses on samples from early (November 7, 2001) and late (January 31, 2002) austral summer revealed that the 3 species contained substantial amounts (33 to 45.5%) of polyunsaturated fatty acids (PUFAs), which are produced by microalgae, indicating the downwards transfer of carbon from sea-ice associated primary production. In the case of A. rara, this may be due to the ingestion of herbivorous metazoa, rather than direct uptake of microalgal material. A. rara contained significantly (p < 0.05) higher amounts of the zooplankton biomarkers 20:1(n-9) and 22:1(n-11), and C. delacai contained more PUFAs early, compared to late, in the season. Two morphotypes of N. hyalinosphaira had different fatty acid Profiles, indicating distinct trophotypes. Our results illustrate specific adaptations to different trophic resources in these protists, and they demonstrate the potential impact that large carnivorous species of Foraminifera may have on the structure of benthic communities where they are abundant. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Natural Environment Research Council: NERC Open Research Archive Antarctic Austral Explorers Cove ENVELOPE(163.583,163.583,-77.567,-77.567) Marine Ecology Progress Series 371 155 164 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences Biology and Microbiology Ecology and Environment |
spellingShingle |
Marine Sciences Biology and Microbiology Ecology and Environment Suhr, Stephanie B. Alexander, Stephen P. Gooday, Andrew J. Pond, David W. Bowser, Samuel S. Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory |
topic_facet |
Marine Sciences Biology and Microbiology Ecology and Environment |
description |
Astrammina rara, Crithionina delacai, and Notodendrodes hyalinosphaira are 3 of the largest and most abundant members of the foraminiferal assemblage at a shallow-water (28 to 32 m) site in Explorers Cove, Antarctica. This study summarizes observations from 2 decades of research, during which we employed laboratory-based feeding experiments and fatty acid biomarker analysis to characterize trophic dynamics and ecological roles of the 3 species, In feeding experiments, A. rara consumed a variety of co-occurring metazoans (several Crustacea, Mollusca, Echinodermata, and a Nephtys species). C. delacai, N. hyalinosphaira, and a number of other foraminiferal species from Explorers Cove successfully trapped Artemia sp. nauplius prey in a setup designed to examine the efficiency of prey capture. Fatty acid analyses on samples from early (November 7, 2001) and late (January 31, 2002) austral summer revealed that the 3 species contained substantial amounts (33 to 45.5%) of polyunsaturated fatty acids (PUFAs), which are produced by microalgae, indicating the downwards transfer of carbon from sea-ice associated primary production. In the case of A. rara, this may be due to the ingestion of herbivorous metazoa, rather than direct uptake of microalgal material. A. rara contained significantly (p < 0.05) higher amounts of the zooplankton biomarkers 20:1(n-9) and 22:1(n-11), and C. delacai contained more PUFAs early, compared to late, in the season. Two morphotypes of N. hyalinosphaira had different fatty acid Profiles, indicating distinct trophotypes. Our results illustrate specific adaptations to different trophic resources in these protists, and they demonstrate the potential impact that large carnivorous species of Foraminifera may have on the structure of benthic communities where they are abundant. |
format |
Article in Journal/Newspaper |
author |
Suhr, Stephanie B. Alexander, Stephen P. Gooday, Andrew J. Pond, David W. Bowser, Samuel S. |
author_facet |
Suhr, Stephanie B. Alexander, Stephen P. Gooday, Andrew J. Pond, David W. Bowser, Samuel S. |
author_sort |
Suhr, Stephanie B. |
title |
Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory |
title_short |
Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory |
title_full |
Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory |
title_fullStr |
Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory |
title_full_unstemmed |
Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory |
title_sort |
trophic modes of large antarctic foraminifera: roles of carnivory, omnivory, and detritivory |
publisher |
Inter-Research |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/11631/ https://nora.nerc.ac.uk/id/eprint/11631/1/m371p155.pdf http://www.int-res.com/articles/meps_oa/m371p155.pdf |
long_lat |
ENVELOPE(163.583,163.583,-77.567,-77.567) |
geographic |
Antarctic Austral Explorers Cove |
geographic_facet |
Antarctic Austral Explorers Cove |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/11631/1/m371p155.pdf Suhr, Stephanie B.; Alexander, Stephen P.; Gooday, Andrew J. orcid:0000-0002-5661-7371 Pond, David W.; Bowser, Samuel S. 2008 Trophic modes of large Antarctic Foraminifera: roles of carnivory, omnivory, and detritivory. Marine Ecology Progress Series, 371. 155-164. https://doi.org/10.3354/meps07693 <https://doi.org/10.3354/meps07693> |
op_doi |
https://doi.org/10.3354/meps07693 |
container_title |
Marine Ecology Progress Series |
container_volume |
371 |
container_start_page |
155 |
op_container_end_page |
164 |
_version_ |
1766214677025521664 |