吉林地区鲤越冬池的冰下浮游生物

Planktons in Carp-wintering Ponds in Jilin Province

吉林地区鲤越冬池冰下浮游植物,总生物量48.11mg/L,其中绿藻门最多,占43.84％;隐藻门、硅藻门次之,各占20％左右;其余各门生物量之和不足15％。轮虫、原生动物和挠足类构成冰下主要浮游动物,生物量8.04mg/L,以轮虫特别是臂尾轮虫量最高。各试验点的浮游生物种、量有较大差别,本文分析了引起差别的原因,同时探讨了浮游生物量与水体透明度的关系。

It was found that total biomass of phytoplankton was 48.11 mg/L comprising 43. 84% chlorophyta, 20% Bacillariophyta, 20% Cryptophyceae and <15% the others in carp-wintering ponds in JiLin, China. About 8. 04 mg/L was the total biomass of zoo-plankton dominated by rotifers, especially.Brachianus spp. The reasons for differences in species and biomass of plankton in various fish ponds were discussed. The relationahip between plankton biomass and transparency was also demonstrated.