小浪底水库调水调沙对黄河壶口至三门峡段浮游生物资源的影响

摘要

通过对2011年小浪底水库调水调沙对浮游生物群落结构的分析表明，调水调沙前后浮游植物种类组成变化不明显，都是以硅藻门占优势，但是密度、生物量显著下降；浮游动物中轮虫种类明显减少，大型浮游动物甲壳类及枝角类部分消失，浮游动物密度、生物量显著下降。%It analyzes the plankton community composition of a regulated discharge regime of the river from June to July in 2011 .The results showed that the change in composition of phytoplankton was not obvious and the dominant species is Bacillariophyta ,but the density and biomass of phytoplank-ton showed significant decline ;A significant reduction in composition of Roti f er ,the density and bio-mass of zooplankton descended obviously .