飞来峡水库蓄水初期营养状态及浮游生物分布特征

于2000年丰水期和枯水期调查分析了新建河流型水库-飞来峡水库在蓄水初期的营养状态及浮游生物特征。结果表明:水库处于营养累积高峰期,已开始回落,但流域上游大量含磷废水使水库中磷含量继续上升,目前属于中营养型。共记录到浮游植物29种(属),以蓝藻门、绿藻门、硅藻门种类较多,其中丰水期以蓝藻和绿藻为主,枯水期是硅藻占优势,除大坝附近外,浮游植物两个季节密度变化不大,为0.39×10⁶cells·L^-1.浮游动物53种(属),其中包括僧帽溞和透明薄皮溞两种嗜寒性种类,丰度为52ind.·L^-1,枯水期高于丰水期,数量以轮虫和无节幼体为多。

Trolphic state and plankton distribution in a newly contructed reservoir, Feiaixia reservior

The trophic state and plankton distribution were investigated in a newly constructed reservoir (Feilaixia reservoir) in 2000. Being a throwflowing reservoir with a retention time of 15 days, its trophic state was high after inundation but decreased rapidly. During investigation, it was mesotrophic with low abundance of phytoplankton (0.39×10⁶ cells·L^-1) and zooplankton (52 ind·L^-1). 29 species of phytoplankton and 53 species of zooplankton were observed in the reservoir. Cyanophyta and Chlorophyta predominated numerically in flood season and then Bacillariophyta in dry season. The abundance of zooplankton was a little higher in flood season than in dry season and predominated numerically by rotifer and nauplii. Although the trophic level in Feilaixia reservoir is a little high, it has low abundance of plankton for it's a throughflowing reservoir with high water runoff.