飞来峡水库蓄水初期浮游植物组成与数量的变化

Dynamics of phytoplankton composition and abundance in Feilaixia reservoir

于2000~2002年的丰水期和枯水期对飞来峡水新建后库的营养状态和浮游植物进行监测。结果表明,水库中氮盐的浓度无显著变化,总磷浓度下降显著。浮游植物优势种类和丰度有较大差异。2000年浮游植物种类为29种,2001和2002年增加到99种;其中以绿藻和硅藻增加的种类数最多,分别增加34和27种。浮游植物丰度为13.4×104~41.6×104cells.L-1,2000年最高,2001年最低。2000年丰水期优势种较为单一,主要以假鱼腥藻(Pseudoanbeanaspp.)为主,枯水期主要是硅藻中的颗粒直链藻(Melosira granulata)丰度较高;2001和2002年丰水期蓝藻、绿藻和硅藻共同占优势,浮游植物无绝对的优势种,蓝藻的相对丰度较高的为假鱼腥藻、蓝纤维藻(Dactylococcopsis acicularis)和粘球藻(Gloeocapsa magma),绿藻的优势种为衣藻(Chlamydomonassp.)和美丽胶网藻(Dictyospharium pul-chellum);硅藻的优势种为梅尼小环藻(Cyclotella menighiniana)和针杆藻(Synedraspp.),...

An investigation on the trophic status and phytoplankton in Feilaixia reservoir in flood-and dry season of 2000,2001 and 2002 showed that in the three years,total phosphorus(TP) concentration had a sharp decrease,while total nitrogen concentration(TN) had no remarkable variation.The species number of phytoplankton increased from 29 in 2000 to 99 in 2001 and 2002,among which, Chrolophyceae and Bacillariophyta contributed most,with an increase of 34 and 27,respectively.The phytoplankton abundance was ranged f...