中山市淡水浮游动物区系调查

2005年6～7月和12月对中山市主要淡水水体的浮游动物区系进行了调查。结果表明,中山市主要淡水水体浮游动物由38目92科129属317种组成。区系特点以原生动物最丰富,有30目82科102属263种,占浮游动物物种总数的83%;其次为轮虫,有4目4科19属37种组成,占12%;枝角类和桡足类物种数最少。各样点浮游动物种类在11～168种之间,种类最少的出现在洪奇沥,最多的出现在逍遥谷。研究结果表明,中山市淡水浮游动物资源比较丰富。各区系浮游动物的分布与水体的营养状态密切相关,污染严重的水体,种类数较少,清洁水体,种类数较多。

Investigation on Freshwater Zooplankton Fauna in Zhongshan City

This paper reports the freshwater zooplankton fauna in Zhongshan City.Study materials were collected in June,July and December 2005.Totally,317 species of zooplankton,belonging to 129 genera,92 families,38 orders were obtained from Zhongshan City,of which 263 species(83% of the zooplankton species number) belong to 102 genera in Protozoa,while 37 species(12%) belong to 19 genera in Rotifera.Only 7 species of Cladocera and 10 species of Copepoda were found,which were 2% and 3% of the zooplankton species number,respectively.The zooplankton species number was 11-168 per sample station with the lowest species number(11) found in Hongqili and the maximum species number(168) found in Xiaoyao Vale.This investigation showed that Zhongshan City had abundant freshwater zooplankton species.The number of zooplankton species showed a close relationship with the trophic status of the sampling stations,the cleaner the water,and the more the species.