天津七里海湿地浮游生物群落结构及多样性分析

2012年5月、7月、9月采取现场调查和采样监测的方法对七里海湿地浮游生物种类、密度和生物量变化动态以及多样性进行了研究。结果表明:该湿地共有浮游植物6门44种,其中蓝藻门11种,绿藻门18种,硅藻门8种,裸藻门4种,甲藻门1种,隐藻门2种。浮游动物13属22种,其中桡足类4属4种,枝角类2属2种,轮虫7属16种。浮游植物的密度和生物量表现为9月7月5月,而浮游动物的密度和生物量表现为5月9月7月。5月、7月、9月湿地浮游植物种类均较丰富;5月湿地浮游动物种类贫乏,7月、9月浮游动物种类一般。这一结果可能与湿地水质污染导致水体富营养化现象有关,水体富营养化程度也表现为5月7月9月。

COMMUNITY STRUCTURE AND BIODIVERSITY OF PLANKTON IN THE WETLAND OF QILIHAI IN TIANJIN

The composition of plankton species, the dynamic change of density and biomass of plankton and species diversity of plankton in the wetland of Qilihai in Tianjin were investigated in May, July and September, 2012 by field investigation and sampling examination. The results showed that there were 44 species of phytoplankton belonging to 6 phyla, with 11 species of Cyanophyta, 18 species of Chlorophyta, 8 species of Bacillariophyta, 4 species of Euglenophyta, 1 species of Pyrrophyta and 2 species of Cryptophyta. There were 13 genus and 22 species of zooplankton, among which 4 genus and 4 species belonged to Cladocera, 2 genus and 2 species belonged to Copepoda, 7 genus and 16 species belonged to Rotifera. The investigation results of density and biomass of plankton in May, July and September showed with the list of September > July > May for phytoplankton, and May > September > July for zooplanktonic. The phytoplankton species were rich in May, July and September, while the zooplanktonic species were poor in May, and general in July and September. There were the explicit relationships between the diversity characteristics of plankton and nutrient pollution which caused water eutrophication, and the extent of water eutrophication in the different months was also showed as May > July > September.