Diet components in the food of Antarctic ascidians living at low levels of primary production
Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources...
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Online Access: | http://dx.doi.org/10.1017/s0954102004001890 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102004001890 |
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crcambridgeupr:10.1017/s0954102004001890 2024-03-17T08:54:34+00:00 Diet components in the food of Antarctic ascidians living at low levels of primary production TATIÁN, MARCOS SAHADE, RICARDO ESNAL, GRACIELA B. 2004 http://dx.doi.org/10.1017/s0954102004001890 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102004001890 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 16, issue 2, page 123-128 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2004 crcambridgeupr https://doi.org/10.1017/s0954102004001890 2024-02-20T00:03:20Z Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources than phytoplankton. Over a year-round period we determined the abundance of the different seston particles which constituted the stomach contents of the Antarctic ascidian Cnemidocarpa verrucosa (Lesson, 1830) at Potter Cove. Stomach repletion was highest in November and lowest in June. Ascidians took in a wide range of particles from large detritus (macroalgal debris and faecal pellets) to minute particles < 5 μm. Large detritus and minute particles together represent the main percentage of contents throughout the year (mean 91%). Diatoms were a low percentage (mean 4.5%). Unidentified flagellates, dinoflagellates and coccolithophorids were scarce, with mean values lower than 4%. Among diatoms benthic species were more abundant in summer and pelagic ones prevailed from March to November. Resuspension of benthic material due to wind mixing and the input of allochthonous particles by currents are important mechanisms that ensure food for ascidians and the community of suspension feeders in Potter Cove. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Cambridge University Press Antarctic The Antarctic Potter Cove Antarctic Science 16 2 123 128 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography TATIÁN, MARCOS SAHADE, RICARDO ESNAL, GRACIELA B. Diet components in the food of Antarctic ascidians living at low levels of primary production |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources than phytoplankton. Over a year-round period we determined the abundance of the different seston particles which constituted the stomach contents of the Antarctic ascidian Cnemidocarpa verrucosa (Lesson, 1830) at Potter Cove. Stomach repletion was highest in November and lowest in June. Ascidians took in a wide range of particles from large detritus (macroalgal debris and faecal pellets) to minute particles < 5 μm. Large detritus and minute particles together represent the main percentage of contents throughout the year (mean 91%). Diatoms were a low percentage (mean 4.5%). Unidentified flagellates, dinoflagellates and coccolithophorids were scarce, with mean values lower than 4%. Among diatoms benthic species were more abundant in summer and pelagic ones prevailed from March to November. Resuspension of benthic material due to wind mixing and the input of allochthonous particles by currents are important mechanisms that ensure food for ascidians and the community of suspension feeders in Potter Cove. |
format |
Article in Journal/Newspaper |
author |
TATIÁN, MARCOS SAHADE, RICARDO ESNAL, GRACIELA B. |
author_facet |
TATIÁN, MARCOS SAHADE, RICARDO ESNAL, GRACIELA B. |
author_sort |
TATIÁN, MARCOS |
title |
Diet components in the food of Antarctic ascidians living at low levels of primary production |
title_short |
Diet components in the food of Antarctic ascidians living at low levels of primary production |
title_full |
Diet components in the food of Antarctic ascidians living at low levels of primary production |
title_fullStr |
Diet components in the food of Antarctic ascidians living at low levels of primary production |
title_full_unstemmed |
Diet components in the food of Antarctic ascidians living at low levels of primary production |
title_sort |
diet components in the food of antarctic ascidians living at low levels of primary production |
publisher |
Cambridge University Press (CUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.1017/s0954102004001890 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102004001890 |
geographic |
Antarctic The Antarctic Potter Cove |
geographic_facet |
Antarctic The Antarctic Potter Cove |
genre |
Antarc* Antarctic Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Science |
op_source |
Antarctic Science volume 16, issue 2, page 123-128 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102004001890 |
container_title |
Antarctic Science |
container_volume |
16 |
container_issue |
2 |
container_start_page |
123 |
op_container_end_page |
128 |
_version_ |
1793772861161209856 |