Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance
In the autumn of 2006, the freshwater hydrozoan jellyfish Craspedacusta sowerbii was observed for the first time in a small lake in Louisville, Kentucky, USA. Medusae were collected for two experiments involving the prey items Bosmina longirostris, Daphnia magna , and Daphnia lumholtzi , and for a t...
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fthighwire:oai:open-archive.highwire.org:plankt:fbn093v1 2023-05-15T18:49:43+02:00 Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance Smith, Allison S. Alexander, James E. 2008-09-16 03:44:13.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/fbn093v1 https://doi.org/10.1093/plankt/fbn093 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/fbn093v1 http://dx.doi.org/10.1093/plankt/fbn093 Copyright (C) 2008, Oxford University Press Article TEXT 2008 fthighwire https://doi.org/10.1093/plankt/fbn093 2016-11-16T18:35:41Z In the autumn of 2006, the freshwater hydrozoan jellyfish Craspedacusta sowerbii was observed for the first time in a small lake in Louisville, Kentucky, USA. Medusae were collected for two experiments involving the prey items Bosmina longirostris, Daphnia magna , and Daphnia lumholtzi , and for a third experiment in unfiltered pond water containing natural densities of in situ fauna. Medusa presence significantly increased prey mortality for all three species in the first two experiments. We found that B. longirostris and D. lumholtzi were significantly more likely to be consumed once killed, compared to D. magna. Daphnia magna was killed at a high rate, but was not consumed. When placed in whole pond water containing a natural complement of zooplankton, medusae were found to significantly alter community abundance by reducing the population abundance of many of the common zooplankton species present, including the rotifer A scomorpha spp., copepod adults and nauplii, and B. longirostris . We argue that C. sowerbii presence has the potential to significantly alter zooplankton communities and, therefore, aquatic food webs, via both direct predation (rotifers, small cladocera, copepods) and incidental mortality (larger zooplankton and small/larval fish). Text Copepods Rotifer HighWire Press (Stanford University) Medusa ENVELOPE(157.417,157.417,-79.633,-79.633) Journal of Plankton Research 30 12 1323 1327 |
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Article Smith, Allison S. Alexander, James E. Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance |
topic_facet |
Article |
description |
In the autumn of 2006, the freshwater hydrozoan jellyfish Craspedacusta sowerbii was observed for the first time in a small lake in Louisville, Kentucky, USA. Medusae were collected for two experiments involving the prey items Bosmina longirostris, Daphnia magna , and Daphnia lumholtzi , and for a third experiment in unfiltered pond water containing natural densities of in situ fauna. Medusa presence significantly increased prey mortality for all three species in the first two experiments. We found that B. longirostris and D. lumholtzi were significantly more likely to be consumed once killed, compared to D. magna. Daphnia magna was killed at a high rate, but was not consumed. When placed in whole pond water containing a natural complement of zooplankton, medusae were found to significantly alter community abundance by reducing the population abundance of many of the common zooplankton species present, including the rotifer A scomorpha spp., copepod adults and nauplii, and B. longirostris . We argue that C. sowerbii presence has the potential to significantly alter zooplankton communities and, therefore, aquatic food webs, via both direct predation (rotifers, small cladocera, copepods) and incidental mortality (larger zooplankton and small/larval fish). |
format |
Text |
author |
Smith, Allison S. Alexander, James E. |
author_facet |
Smith, Allison S. Alexander, James E. |
author_sort |
Smith, Allison S. |
title |
Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance |
title_short |
Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance |
title_full |
Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance |
title_fullStr |
Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance |
title_full_unstemmed |
Potential effects of the freshwater jellyfish Craspedacusta sowerbii on zooplankton community abundance |
title_sort |
potential effects of the freshwater jellyfish craspedacusta sowerbii on zooplankton community abundance |
publisher |
Oxford University Press |
publishDate |
2008 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/fbn093v1 https://doi.org/10.1093/plankt/fbn093 |
long_lat |
ENVELOPE(157.417,157.417,-79.633,-79.633) |
geographic |
Medusa |
geographic_facet |
Medusa |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/fbn093v1 http://dx.doi.org/10.1093/plankt/fbn093 |
op_rights |
Copyright (C) 2008, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/fbn093 |
container_title |
Journal of Plankton Research |
container_volume |
30 |
container_issue |
12 |
container_start_page |
1323 |
op_container_end_page |
1327 |
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1766243316467236864 |