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High species richness of Chironomidae (Diptera) in temporary flooded wetlands associated with high species turn-over rates
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
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2010 (English)In: Bulletin of entomological research, ISSN 0007-4853, E-ISSN 1475-2670, Vol. 100, no 4, 433-444 p.Article in journal (Refereed) Published
Abstract [en]

Species richness and species turn-over of Chironomidae was studied in irregularly flooded wetlands of the River Dalalven flood-plains in central Sweden. The chironomid fauna, sampled with emergence traps in six wetlands over six summers, contained as much as 135 species, and the cumulative species curves indicated that the regional species pool contain several more species. Recurrent irregular floods may have induced this high chironomid species richness and the high species turn-over in the temporary wetlands, as the dominance between terrestrial and aquatic species shifted between years. Half of the wetlands were treated with Bacillus thuringiensis var. israelensis (Bti) against larvae of the floodwater mosquito Aedes sticticus. These treatments had no significant effect on chironomid species richness, but there was a higher species turn-over between years of primarily low abundance species in the treated wetlands. The cumulative number of species was also higher in the Bti-treated experimental wetlands than in the untreated reference wetlands. Thus, Bti treatment against mosquito larvae seemed to have only small effects on chironomid species richness but seemed to increase the colonisation-extinction dynamics.

Place, publisher, year, edition, pages
2010. Vol. 100, no 4, 433-444 p.
Keyword [en]
Chironomidae, species richness, species turn-over, Bti, wetlands
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-135958DOI: 10.1017/S0007485309990472ISI: 000280020700007PubMedID: 19939319OAI: oai:DiVA.org:uu-135958DiVA: diva2:375901
Available from: 2010-12-09 Created: 2010-12-09 Last updated: 2017-12-11Bibliographically approved

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