升钟水库富营养状况及生物群落调查评价

根据2008～2009年对升钟水库的逐月监测结果,采用综合营养状态指数法,对湖泊富营养化现状进行了评价,并对水库的浮游植物群落种类和密度进行了定性定量分析。结果表明,水库目前处于中营养状态,但在初夏和秋季由于温度和降水等气象条件的影响,可达到轻度富营养,其程度随季节变化明显：初夏和初秋形成高峰,冬、春季为低谷。从生物群落分析,浮游植物种类及密度在不同季节差别较大,初春及夏季的较其他季节多、冬季最低,优势种为蓝绿藻和硅藻。

Investigation and Assessment of Eutrophication Status and Biocenosis in Shengzhong Reservoir

Based to the monthly monitoring data of water quality in Shengzhong Reservoir during 2008 - 2009, a comprehensive nutrition index assessment is conducted, and the phytoplankton species and density are analyzed quantitatively as well. The results show that the reservoir is now at medium eutrophication level. However, it may be at light level of eutrophication in early summer and autumn significantly depending on the meteorological conditions such as temperature and precipitation. According to the analysis of biocenosis, the species and density of phytoplankton change very much seasonally, higher in early spring and summer and lowest in winter. The blue-green algae and diatom are dominant species.