水库浮游植物群落与环境多因子分析

Multivariate analysis of phytoplankton community and environment in reservoir

根据大伙房水库浮游植物群落 (浮游植物生物量和丰度 )和水文水质 (年降雨量 ,年入、出库水量 ,7～ 8月入出库水量、流量、水位 ,6～ 9月水位差、库容 ,7～ 8月平均水温 ,7～ 8月入、出库水量与库容之比和 7～ 8月入、出库水量之比 ,总氮 ,氨氮 ,硝酸盐氮 ,亚硝酸盐氮和磷酸盐 )等 2 0项因子进行了简单相关、偏相关和灰关联分析 ,得出它们之间的相互关系以及理化因子对浮游植物的关联度和关联序 ,其中 ,水位和 7～ 8月入、出库水量之比分别与浮游植物生物量和丰度有较显著的偏相关 。

variables including the biomass and abundance of phytoplankton, precipitation, annual inflow, annual discharge, inflow from June to August, discharge from June to August, flow amount from June to August, water level, reservoir storage, water temperature, inflow from June to August/V, discharge from June to August/V, the ratio of the inflow and the discharge, total nitrogen, ammonium, nitrite, nitrate and phosphorus in Dahuofang Reservoir from 1980 to 1996 were analysed by simple and partial correlation and gray system theory, respectively. It showed that the greatest correlation were between the water level and the abundance of phytoplankton and between the ratio of the inflow and the discharge.