洞庭湖轮虫生态分布的研究

1985～1986年,对洞庭湖水体进行了8次轮虫样品的采集和分析。两年观察到轮虫108种,其中终年出现的种类有10种。轮虫总数O—512.8ind./L,全湖平均75.1ind./L。本文从湖区自然生态环境对轮虫种类、数量的影响进行研究,探讨了大型开放湖泊轮虫分布与若干生态因子的关系。认为泥沙含量、流速、营养盐多寡以及入湖水体轮虫种群状况是影响洞庭湖轮虫分布的主要因素。

THE STUDY ON ECOLOGICAL DISTRIBUTION OF ROTIFERS IN DONGTING LAKE

This paper discusses the ecological distribution of rotifers in the Dongting lake where 108 species were identified. The relationship between rotifers distribution and some eclogyical factors in large scale open lakes is discussed. These factors are temperature, seasonal change, food, rotifers species of upper reaches in the Dongting lake etc. Flow velocity and silt content are considered to be the important factors restricting the distribution of rotifers in the Dongting lake.