Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake
Cultural oligotrophication is expected to shift lake zooplankton to become dominated by calanoid copepods. Hence, understanding the influence of calanoids on the taxonomic and size structure of the lower plankton food web is crucial for predicting the effects of oligotrophication on energy fluxes in...
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ftubkonstanz:oai:kops.uni-konstanz.de:123456789/48185 2024-02-11T10:09:30+01:00 Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake Kunzmann, Alessandra Janina Ehret, Harald Yohannes, Elizabeth Straile, Dietmar Rothhaupt, Karl-Otto 2019-12-23 application/pdf http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1257g1yutrcgr2 https://doi.org/10.1093/plankt/fbz067 eng eng http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1257g1yutrcgr2 http://dx.doi.org/10.1093/plankt/fbz067 168916283X https://rightsstatements.org/page/InC/1.0/ Journal of Plankton Research. 2019, 41(6), pp. 955-966. ISSN 0142-7873. eISSN 1464-3774. Available under: doi:10.1093/plankt/fbz067 ddc:570 doc-type:article doc-type:Text 2019 ftubkonstanz https://doi.org/10.1093/plankt/fbz067 2024-01-21T23:53:14Z Cultural oligotrophication is expected to shift lake zooplankton to become dominated by calanoid copepods. Hence, understanding the influence of calanoids on the taxonomic and size structure of the lower plankton food web is crucial for predicting the effects of oligotrophication on energy fluxes in these systems. We studied the effect of an omnivorous calanoid, Eudiaptomus gracilis, on the lower planktonic food web using an in situ incubation approach in large and deep Lake Constance. We show that E. gracilis significantly reduced ciliate, phytoplankton, rotifer, but increased bacteria biovolume. Highest clearance rates were observed for ciliates whose biovolume declines may have caused a release of predation pressure on bacteria. E. gracilis grazing shifted the size structure of the phytoplankton community by reducing mean phytoplankton cell size (directional selection) and simultaneously increasing cell size variance (disruptive selection). Ciliate cell sizes experienced a similar selective regime in one of the experiments, whereas in the other two experiments, no change of size structure was detected. Results suggest strong influences of E. gracilis grazing on the lower plankton food web and a significant shift in phytoplankton size structure. For evaluating detailed effects of omnivorous consumers on plankton size structure, cascading interactions need to be considered. published Article in Journal/Newspaper Copepods Rotifer KOPS - The Institutional Repository of the University of Konstanz Journal of Plankton Research 41 6 955 966 |
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KOPS - The Institutional Repository of the University of Konstanz |
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ftubkonstanz |
language |
English |
topic |
ddc:570 |
spellingShingle |
ddc:570 Kunzmann, Alessandra Janina Ehret, Harald Yohannes, Elizabeth Straile, Dietmar Rothhaupt, Karl-Otto Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
topic_facet |
ddc:570 |
description |
Cultural oligotrophication is expected to shift lake zooplankton to become dominated by calanoid copepods. Hence, understanding the influence of calanoids on the taxonomic and size structure of the lower plankton food web is crucial for predicting the effects of oligotrophication on energy fluxes in these systems. We studied the effect of an omnivorous calanoid, Eudiaptomus gracilis, on the lower planktonic food web using an in situ incubation approach in large and deep Lake Constance. We show that E. gracilis significantly reduced ciliate, phytoplankton, rotifer, but increased bacteria biovolume. Highest clearance rates were observed for ciliates whose biovolume declines may have caused a release of predation pressure on bacteria. E. gracilis grazing shifted the size structure of the phytoplankton community by reducing mean phytoplankton cell size (directional selection) and simultaneously increasing cell size variance (disruptive selection). Ciliate cell sizes experienced a similar selective regime in one of the experiments, whereas in the other two experiments, no change of size structure was detected. Results suggest strong influences of E. gracilis grazing on the lower plankton food web and a significant shift in phytoplankton size structure. For evaluating detailed effects of omnivorous consumers on plankton size structure, cascading interactions need to be considered. published |
format |
Article in Journal/Newspaper |
author |
Kunzmann, Alessandra Janina Ehret, Harald Yohannes, Elizabeth Straile, Dietmar Rothhaupt, Karl-Otto |
author_facet |
Kunzmann, Alessandra Janina Ehret, Harald Yohannes, Elizabeth Straile, Dietmar Rothhaupt, Karl-Otto |
author_sort |
Kunzmann, Alessandra Janina |
title |
Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
title_short |
Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
title_full |
Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
title_fullStr |
Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
title_full_unstemmed |
Calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
title_sort |
calanoid copepod grazing affects plankton size structure and composition in a deep, large lake |
publishDate |
2019 |
url |
http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1257g1yutrcgr2 https://doi.org/10.1093/plankt/fbz067 |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
Journal of Plankton Research. 2019, 41(6), pp. 955-966. ISSN 0142-7873. eISSN 1464-3774. Available under: doi:10.1093/plankt/fbz067 |
op_relation |
http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1257g1yutrcgr2 http://dx.doi.org/10.1093/plankt/fbz067 168916283X |
op_rights |
https://rightsstatements.org/page/InC/1.0/ |
op_doi |
https://doi.org/10.1093/plankt/fbz067 |
container_title |
Journal of Plankton Research |
container_volume |
41 |
container_issue |
6 |
container_start_page |
955 |
op_container_end_page |
966 |
_version_ |
1790609429052260352 |