Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway
Species composition and body-size distribution were studied in the crustacean zooplankton communities of two limnologically similar lake localities situated 50 km apart in the Pasvik River System, northern Norway. A recent invasion and successive downstream expansion of vendace ( Coregonus albula ),...
Published in: | Journal of Plankton Research |
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Oxford University Press
1998
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fthighwire:oai:open-archive.highwire.org:plankt:20/2/243 2023-05-15T17:43:23+02:00 Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway Bøhn, Thomas Amundsen, Per-Arne 1998-01-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/20/2/243 https://doi.org/10.1093/plankt/20.2.243 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/20/2/243 http://dx.doi.org/10.1093/plankt/20.2.243 Copyright (C) 1998, Oxford University Press ORIGINAL ARTICLES TEXT 1998 fthighwire https://doi.org/10.1093/plankt/20.2.243 2007-06-24T05:09:50Z Species composition and body-size distribution were studied in the crustacean zooplankton communities of two limnologically similar lake localities situated 50 km apart in the Pasvik River System, northern Norway. A recent invasion and successive downstream expansion of vendace ( Coregonus albula ), a specialized zooplanktivorous fish, allowed comparisons between sites with different predation pressures. Vendace had established a high population density and was the dominant fish species in the pelagic of the upper locality, but had just invaded the lower locality with a small number of individuals. Whitefish ( Coregonus lavaretus ), a closely related but less specialized zooplanktivore species, dominated the native fish community of both lakes. The zooplankton community of the upper locality was dominated in June and August by Bosmina longirostris , the smallest zooplankton species represented in the water course, and in September by Daphnia cristata . The lower locality was dominated by the larger Holopedium gibberum and Eudiaptomus graciloides in June, by D.cristata in August, and by D.cristata and B.longirostris in September. The mean body size of the three most abundant cladoceran species was significantly smaller in the upper locality, compared to the lower locality. It was concluded that the invasion and establishment of a dense vendace population in the upper locality had increased the predation pressure in the pelagic, resulting in a reduction of body size and a shift towards smaller species in the zooplankton community. Text Northern Norway Pasvik HighWire Press (Stanford University) Norway Pasvik ENVELOPE(30.580,30.580,69.810,69.810) Journal of Plankton Research 20 2 243 256 |
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HighWire Press (Stanford University) |
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fthighwire |
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English |
topic |
ORIGINAL ARTICLES |
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ORIGINAL ARTICLES Bøhn, Thomas Amundsen, Per-Arne Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway |
topic_facet |
ORIGINAL ARTICLES |
description |
Species composition and body-size distribution were studied in the crustacean zooplankton communities of two limnologically similar lake localities situated 50 km apart in the Pasvik River System, northern Norway. A recent invasion and successive downstream expansion of vendace ( Coregonus albula ), a specialized zooplanktivorous fish, allowed comparisons between sites with different predation pressures. Vendace had established a high population density and was the dominant fish species in the pelagic of the upper locality, but had just invaded the lower locality with a small number of individuals. Whitefish ( Coregonus lavaretus ), a closely related but less specialized zooplanktivore species, dominated the native fish community of both lakes. The zooplankton community of the upper locality was dominated in June and August by Bosmina longirostris , the smallest zooplankton species represented in the water course, and in September by Daphnia cristata . The lower locality was dominated by the larger Holopedium gibberum and Eudiaptomus graciloides in June, by D.cristata in August, and by D.cristata and B.longirostris in September. The mean body size of the three most abundant cladoceran species was significantly smaller in the upper locality, compared to the lower locality. It was concluded that the invasion and establishment of a dense vendace population in the upper locality had increased the predation pressure in the pelagic, resulting in a reduction of body size and a shift towards smaller species in the zooplankton community. |
format |
Text |
author |
Bøhn, Thomas Amundsen, Per-Arne |
author_facet |
Bøhn, Thomas Amundsen, Per-Arne |
author_sort |
Bøhn, Thomas |
title |
Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway |
title_short |
Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway |
title_full |
Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway |
title_fullStr |
Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway |
title_full_unstemmed |
Effects of invading vendace (Coregonus albula L.) on species composition and body size in two zooplankton communities of the Pasvik River System, northern Norway |
title_sort |
effects of invading vendace (coregonus albula l.) on species composition and body size in two zooplankton communities of the pasvik river system, northern norway |
publisher |
Oxford University Press |
publishDate |
1998 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/20/2/243 https://doi.org/10.1093/plankt/20.2.243 |
long_lat |
ENVELOPE(30.580,30.580,69.810,69.810) |
geographic |
Norway Pasvik |
geographic_facet |
Norway Pasvik |
genre |
Northern Norway Pasvik |
genre_facet |
Northern Norway Pasvik |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/20/2/243 http://dx.doi.org/10.1093/plankt/20.2.243 |
op_rights |
Copyright (C) 1998, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/20.2.243 |
container_title |
Journal of Plankton Research |
container_volume |
20 |
container_issue |
2 |
container_start_page |
243 |
op_container_end_page |
256 |
_version_ |
1766145431852548096 |