【摘要】 系统地比较了草型湖泊扁担塘与藻型湖泊后湖大型底栖动物的群落结构.结果表明,草型湖泊扁担塘的物种种类、物种多样性、密度和生物量均较藻型湖泊后湖的为高.两湖在物种组成和功能摄食群上存在极大差异,相似性系数为0.3左右,草型湖泊的大型底栖动物主要以刮食者数量为多,而藻型湖泊主要以收集者的为多.这说明水生高等植物对于维持湖泊生态系统中大型底栖动物多样性方面起着非常重要的作用,也是维持湖泊生态系统结构复杂性、空间异质性和功能稳定性的重要因素.更多还原

【Abstract】 A systematically comparative study on community structure of macrozoobenthos betweena a typical macrophytic lake, Lake Biandantang and a typical algal lake, Lake Houhu, was carried out from April, 1996 to March, 1997. The results showed that the species number, biodiversity, abundance and biomass of macrozoobenthos community in Lake Biandantang were much higher than those of macrozoobenthos in Lake Houhu; species composition and functional feeding groups were also prominently different, the similarity coefficient of macrozoobenthos communities in the two Lakes was about 0. 30;in Biandantang Lake, scrapers were dominant in abundance and biomass, while in Houhu Lake, direct -collectors were dominant in number. These all probably were due to the presentation of higher aquatic macrophytes, especially those submerged ones, which provide various habitats and niches for more species, at the same time, keep the aquatic ecosystem complex, spatially heterogeneous and functionally stable.更多还原