文章基本信息

标题：Immediate Impact of an Extensive Summer Flood on the Adult Fish Assemblage of a Channelized Lowland River
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作者：Pavel Jurajda ; Martin Reichard ; Carl Smith 等
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2006
卷号：21
期号：3
页码：493-501
DOI：10.1080/02705060.2006.9665027
出版社：Taylor & Francis
摘要：The fish community of a channelized stretch of a lowland floodplain River Morava (Danube basin) was surveyed before and after an exceptionally extensive flood in July 1997. Water discharge peaked at 2,000% of long-term average and discharge > 1,000 % lasted for 20 days. Electrofishing survey along the bank in three inter-weir reaches revealed 26 species, with the same species (chub Leuciscus cephalus, gudgeon Gobio gobio) dominating before and after the flood. The flood had a minor effect on the assemblage structure. The total density of fish was not significantly different before and immediately after the flood. The largest decline was observed for pelagic species (e.g. bleak Alburnus alburnus, roach Rutilus rutilus) and benthic species (e.g. barbel Barbus barbus). The overall gudgeon abundance did not decrease significantly after the flood, though length-frequency distribution revealed a decrease in abundance of one-year-old individuals. The flood had no effect on abundance of chub and burbot (Lota lota) but increased the abundance of perch (Perca fluviatilis).