连环湖他拉红泡浮游生物组成及水质分析

报道了连环湖他拉红泡（卡拉白鱼放养场）的水质季节变化动态及浮游生物组成。结果表明：该水水质透明度为23～35cm，pH=8．00～8．82，硬度为1．2854～3．3315mmol／L，碱度为6．8796～9．6179mmol／L。水呈碱性，水型属碳酸盐类、镁组Ⅰ型水（CME）和软水。水中COD含量为8．56～11．36mg／L；主要营养元素总氮为0．5455～0．7618mg／L，总磷为0．4315～0．4950mg／L，属于中富-富营养型湖泊。湖水中多数理化组分在季节分布上差异不明显，个别测定值在5月（枯水期）较高，9月（平水期）出现回落。浮游植物5个门37个种属，其中硅藻门、绿藻门、蓝藻门3个门有34个种属，占98．93％；浮游植物总平均量为687．56×10^4ind／L，生物量8．8883mg／L。浮游动物共4类31个种属，数量上以原生动物、轮虫为主，占77．67％，生物量桡足类最大，为1．1930mg／L，浮游动物总平均量为270．690ind／L。

Monitoring and analysis on water quality and plankton of Thlahong in Lianhuan Lake

The monitoring data of water and season changes and plankton of Talahong in Lianhuan Lake were reported. The results indicated that its water quality was good, with transparency of 23--35 cm, pH = 8.00--8.82, DK 1. 285 4--3. 331 5 mmol/L, Alk. 6. 879 6--9. 617 9 mmol/L, and the water type C1^Mg as well as soft water. COD is 8.56--11.36 mg/L. The content of major nutrient elements such as TN is 0. 545 5--0. 761 8 mg/L, which was lower than TN of main lakes in Heilongjiang Province, TP （0. 431 5--0. 495 0 mg/L） is normal. The lake belongs to eutrophication lake. The majority of data did not change obviously during different seasons. However, a few data were high in May, while some were low in September. Phytoplankton belong to 5 Phylum-37 Genus or Species,the most quantity are Bacillariophyta,Chlorophyta and Cyanophyta, the rate is 98.93%. Total average quantity of Phytoplankton is 687.56 ×10^4ind/L, and biomass is 8. 888 3 mg/L; Zooplankton belong to 4 Phylums-31 Genus or Species, protozoon and rotifer have the most quantity（77.67%）, Copepoda have the most biomass（1. 1930 mg/L）, total average quantity of Zooplankton is 270. 690 ind/L.