京郊污水池塘浮游动物群落与生物量预测

COMMUNITY STRUCTURE AND BIOMASS PREDICTION OF ZOOPLANKTON IN A SEWAGE POND IN BEIJING SUBURB

经调查，在京郊污水池塘中，共鉴定出浮游动物７８种，周年数量动态具有双峰型特点，但生物量动态却有一大二小之势，浮游动物年平均数量和年平均生物量分别为１９８１５１×１０４个／Ｌ和３９４２１０ｍｇ／Ｌ。依据轮虫、甲壳动物、原生动物与浮游动物生物量之间均有密切相关的原理，经计算建立了三个线性回归方程，预测值与实测基本相吻合，相对比较其中以＾ｙ＝１０３５７ｘ－１５０４３７ｒ＝０７６８１Ｐ＜００１｜ｔ｜＝０９９９８＞ｔ０４∴０４＞Ｐ＞０３ｘ为２５０孤雌生殖（以下用２５０♀♀表示）轮虫怀卵总数（个）＾ｙ为浮游动物生物量（ｍｇ／Ｌ）最为简单，十分易操作，利于在相似水域浮游动物群落中加以应用，它能较准确地预测全年不同季节的生物量动态变化。

This paper deals with the results of an observation on the community structure of zooplankton in a sewage pond in a Beijing suburb. Total 78 species of zooplankton are identified. The zooplankton annual average abundance and biomass were 19 8151 10 4/L and 39 4210mg/L respectively.The maximum of biomass was usually recorded in May-June. The influence of some biotic and abiotic factors on plankton community was analysed.The rotifers biomass was very high and about 53 62% of average biomass of the total zooplankton. We established a linear equation of zooplankton biomass as following: =1 0357 X -15 0437( r =0 7681 P <0 01) X :The number of eggs in 250 females of rotifers :zooplankton biomass mg/L