晋南盐水水域生物资源调查 二、北门滩

Biological Resources in Inland Saline Waters from Southern Shanxi China Part 2Pool Beimentan

本文报道了１９８２～１９９０年５次对北门滩生物资源的调查结果。该湖水型为ＮａＭｇｓＯ＿４Ｃｌ型，平均盐度６．９２ｇ／Ｌ，ｐＨ值８．６～１０．３，碱度１０．３ｍｍｏｌ／Ｌ．共见到９０种浮游植物、６４种浮游动物、４种底栖动物和７种鱼类。浮游生物优势种类有衣藻、孟氏小环藻、舟形藻、湖生卵囊藻、铜绿微囊藻、绿裸藻、啮蚀隐藻、褶皱臂尾轮虫、壶状臂尾轮虫、角突臂尾轮虫、环顶巨腕轮虫、大型、等刺温剑水蚤等．浮游植物生物量１７．８５ｍｇ／Ｌ，浮游动物和底栖动物的平均生物量分别为８．０８ｍｇ／Ｌ和０．００３ｇ／ｍ￣２．文中还讨论了北门滩水化学和水生生物学特点并与硝池进行了比较。

This paper discribes the results of the chemical and biological surveys of Pcol Beimentan Locaded in Jinnan Region,Shanxi,China,during 1982 1990.The water type of the lake is NaMgSO_4Cl subtype,the salinity 6. 92 g/L,pH value from 8. 6 to 10.3 and alkalinitv 1 0.3 mmol/L,with an area of 3.34 km￣2,and mean depth of about 1.3m,Ninety species of phytoplankton,64 species zcoplankton,4 species zoobenthos and 7 species fishes are recorded.As far as plankton,the dominant species are Chlanmydomonas spp.,Cyclotella meneghiniana,Navicula spp.,Oocystis lacustris,Microcystis aeruginosa, Eugle-na viridis,Cryptomonas erosa,Prymnesium parvum,Brachionus plicatilis,B.urceus,B.angularis,Pedalia fennica,Daphnia magna and Thermocyclops hyal-inus,et al. The average biomas of phytoplankton determined by the methed of caculating cell volume is 17.85 mg/L,in which both Bacillariophyta and Chloro-phyta predominated.The average biomass of zcoplankton and zcobenthos are 8.08 mg/L and 0.003g/m￣2,respectively.The chemical and biological feathers as well as the fisheries utilization of the lake are discussed and compared with the other saline lakes。