尼尔基水库浮游植物多样性初步研究

Preliminary study on phytoplankton diversity in Nierji reservoir

于2011年9月对尼尔基水库浮游植物进行的初步调查,主要以形态学进行了种类鉴定和细胞密度计数。结果表明尼尔基水库浮游植物有5门21种(变种),种类最多的为硅藻门,共鉴定出17种。浮游植物细胞密度为6.62×105个/L,其中硅藻门细胞密度为4.31×105个/L(65.16%),优势种类为圆柱形鼓藻、中型脆杆藻、尖针杆藻、两头舟形藻、针状蓝纤维藻。Shannon-Wiener指数和Margalef指数分别为3.58和1.49。以浮游植物细胞密度与种群结构特征评价,尼尔基水库营养类型为寡营养型水库。

The primary survey of phytoplankton is carried out in Nierji reservoir in September 2011.The survey identifies species with morphology and counts the cell density.The result shows that there are 5 phylum,21 species(varietas) phytoplanktons in Nierji reservoir,17 species of bacillariophyta is the most.The cell density of phytoplanktons in Per liter is 662 thousand,including the cell density of bacillariophyta is 431 thousand(65.16% of the total).The dominant species includes the penium cylindrus,the fragilaria intermedia,the synedra acusvar,the navicula dicephala and the dactylococcopsis acicularis.The Shannon-Wiener index is 3.58 and the Margalef index is 1.49.The Nierji reservoir is oligotrophic depend on the phytoplanktons cell density and the species structure characteristics.