Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea
The interaction of the chaetognath Sagitta elegans with the copepod community of the southeast Bering Sea middle shelf was examined in relation to environmental conditions during 1995–1999. Predation impact was estimated for 2 years, 1995 and 1997, using gut content analysis, experimentally derived...
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2005
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fthighwire:oai:open-archive.highwire.org:plankt:27/11/1113 2023-05-15T15:43:31+02:00 Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea Baier, C. T. Terazaki, M. 2005-11-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/27/11/1113 https://doi.org/10.1093/plankt/fbi078 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/27/11/1113 http://dx.doi.org/10.1093/plankt/fbi078 Copyright (C) 2005, Oxford University Press ORIGINAL ARTICLES TEXT 2005 fthighwire https://doi.org/10.1093/plankt/fbi078 2007-06-24T13:07:36Z The interaction of the chaetognath Sagitta elegans with the copepod community of the southeast Bering Sea middle shelf was examined in relation to environmental conditions during 1995–1999. Predation impact was estimated for 2 years, 1995 and 1997, using gut content analysis, experimentally derived digestion time (DT) and abundances of chaetognaths and prey. Pseudocalanus concentrations correlated with water temperature and Calanus marshallae with sea ice extent. Sagitta elegans were less abundant but individuals were larger in 1995, when C. marshallae predominated, compared to 1997, when Pseudocalanus and Acartia were the primary prey. Predation by S. elegans removed <1% standing stock day−1 of Pseudocalanus or C. marshallae in 1995 and 1.7 to 2.3% of Pseudocalanus in 1997. The percent of the copepod community biomass required by chaetognaths was estimated to be <1% in 1995 compared with 8–12% in 1997. Calanus marshallae may be more vulnerable than Pseudocalanus to cumulative predation effects because of its reproductive strategy. The effect of chaetognath predation on the copepod community depends on which copepod species is predominant and its susceptibility to cumulative predation effects, as well as on daily predation impact, both of which varied between years with different climatic conditions. Text Bering Sea Sea ice Copepods HighWire Press (Stanford University) Bering Sea Journal of Plankton Research 27 11 1113 1125 |
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Open Polar |
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HighWire Press (Stanford University) |
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fthighwire |
language |
English |
topic |
ORIGINAL ARTICLES |
spellingShingle |
ORIGINAL ARTICLES Baier, C. T. Terazaki, M. Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea |
topic_facet |
ORIGINAL ARTICLES |
description |
The interaction of the chaetognath Sagitta elegans with the copepod community of the southeast Bering Sea middle shelf was examined in relation to environmental conditions during 1995–1999. Predation impact was estimated for 2 years, 1995 and 1997, using gut content analysis, experimentally derived digestion time (DT) and abundances of chaetognaths and prey. Pseudocalanus concentrations correlated with water temperature and Calanus marshallae with sea ice extent. Sagitta elegans were less abundant but individuals were larger in 1995, when C. marshallae predominated, compared to 1997, when Pseudocalanus and Acartia were the primary prey. Predation by S. elegans removed <1% standing stock day−1 of Pseudocalanus or C. marshallae in 1995 and 1.7 to 2.3% of Pseudocalanus in 1997. The percent of the copepod community biomass required by chaetognaths was estimated to be <1% in 1995 compared with 8–12% in 1997. Calanus marshallae may be more vulnerable than Pseudocalanus to cumulative predation effects because of its reproductive strategy. The effect of chaetognath predation on the copepod community depends on which copepod species is predominant and its susceptibility to cumulative predation effects, as well as on daily predation impact, both of which varied between years with different climatic conditions. |
format |
Text |
author |
Baier, C. T. Terazaki, M. |
author_facet |
Baier, C. T. Terazaki, M. |
author_sort |
Baier, C. T. |
title |
Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea |
title_short |
Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea |
title_full |
Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea |
title_fullStr |
Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea |
title_full_unstemmed |
Interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern Bering Sea |
title_sort |
interannual variability in a predator-prey interaction: climate, chaetognaths and copepods in the southeastern bering sea |
publisher |
Oxford University Press |
publishDate |
2005 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/27/11/1113 https://doi.org/10.1093/plankt/fbi078 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea Sea ice Copepods |
genre_facet |
Bering Sea Sea ice Copepods |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/27/11/1113 http://dx.doi.org/10.1093/plankt/fbi078 |
op_rights |
Copyright (C) 2005, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/fbi078 |
container_title |
Journal of Plankton Research |
container_volume |
27 |
container_issue |
11 |
container_start_page |
1113 |
op_container_end_page |
1125 |
_version_ |
1766377677394018304 |