韶关北江特有珍稀鱼类省级自然保护区水生生物群落结构特征分析

2019 年 8 月对韶关北江特有珍稀鱼类省级自然保护区内水域开展了浮游植物、浮游动物、底栖动物等调查，共发现浮游植物种类 6 门 67 种（属），浮游动物 68 种（属），大型底栖动物 3 门 27 属（科）。浮游植物种群丰度为 6.41×105~11.03×105 cells/L，Shannon-Wiener 多样性指数为 2.226~2.803；浮游动物种群丰度为 54~151.25 ind/L，Shannon-Wiener 多样性指数为 2.814~3.244；底栖动物种群丰度的变化范围为 18~102 ind/m2。表明：韶关北江特有珍稀鱼类自然保护区内水体为中营养型，生物多样性指数一般，水体环境质量中等，水体受污染程度较低。

Structure Characteristics Analysis of Aquatic Community in Rare and Endemic Fishes Nature Reserve of Beijiang River, Shaoguan

Phytoplankton, zooplankton, zoobenthos in Rare and Endemic Fishes Nature Reserve of Beijiang River, Shaoguan in August 2019. There were a total of 67 phytoplankton taxons belonging to 6 phyla, 68 zooplankton species(genera), 27 zoobenthos genera belonging to 3 phyla. The density of phytoplankton in the Nature Reserve was from 6.41×105 to 11.03 ×105 cells · L-1 and the Shannon Wiener diversity index was from 2.226 to 2.803; The density of zooplankton in the Nature Reserve was from 54 to 151.25 ind · L-1 and the Shannon Wiener diversity index was from 2.814 to 3.244; The density of zoobenthos in the Nature Reserve was from 18 to 102 ind/m2. The results show that the water was medium nutrition type, and the bio-diversity was ordinary, and the environment quality of water was medium, and the pollute of water is relatively low in the Rare and Endemic Fishes Nature Reserve of Beijiang River, Shaoguan.