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The spatial pattern of periphytic algae communities and its corresponding mechanism to environmental variables in the Weihe River Basin

机译：The spatial pattern of periphytic algae communities and its corresponding mechanism to environmental variables in the Weihe River Basin

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摘要

Periphytic algae is a useful indicator of aquatic ecological conditions. We investigated the periphytic algae on natural substrate and the environmental variables at 44 sites on three river systems in the Weihe River Basin (WRB). A total of 84 species are identified,representing 37 genera. The most common genera were Navicula,Oscillatoria,Nitzschia,Scenedesmus,Cymbell,and Fragilaria. One-way analysis of variance (ANOVA) indicated significant differences among the three river systems in environmental variables (p p Navicula pupula,Navicula radiosq,Nitzschia palea,and Nitzschia denticula,exhibiting wide ecological amplitude,are tolerant of high concentrations of nutrient pollution. Variation of periphytic algae communities in WRB is due to the combination of anthropogenic and natural factors including agricultural and domestic wastes water inputting,land use patterns,geology,climatic changes,and river hydrology.

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