环境因子对萼花臂尾轮虫种群动态的影响  

THE EFFECT OF ENVIRONMENTAL FACTORS ON THE POPULATION DYNAMICS OF BRACHIONUS CALYCIFLORUS

作　　者：席贻龙[1,2] 黄祥飞[3] 汪本勤 许蕴娴 

机构地区：[1]安徽师范大学生命科学学院 [2]中国科学院水生生物研究所,湖北武汉430072 [3]中国科学院水生生物研究所 [4]安徽省六安农校 [5]安徽省宁国市职业高级中学

出　　处：《安徽师范大学学报（自然科学版）》2000年第4期334-338,共5页Journal of Anhui Normal University(Natural Science)

基　　金：国家自然科学基金!(39870 15 8)

摘　　要：应用单个体培养方法研究了藻类食物的种类和浓度以及培养温度对萼花臂尾轮虫种群动态的影响 .结果显示 ,藻类食物的种类和斜生栅藻浓度均仅对轮虫的幼体阶段历时和产卵量具有显著的影响 ;三类食物中蛋白核小球藻是轮虫种群增长的最适藻类食物 ;若以斜生栅藻为食物 ,轮虫种群增长的最适浓度为 6.0× 10 6cells/ml.轮虫各主要发育阶段的历时皆随着温度的升高而极显著地缩短 ,但温度对其产卵量无显著的影响 :30℃下该种轮虫种群的内禀增长率最大 .The effects of food quality and quantity, and temperature on the population dynamics of freshwater rotifer Brachionus calyciflorus were studied by means of individual culture. The results showed that the effects of the alga food type and the concentration of alga Scenedesmus obliquus on thd duration of juvenile period and the number of eggs produced per life cycle of B. calyciflorus were both significant. The alga Chlorella pyrenoidosa was the best for the population growth of the rotifer among the three types of food. If the alga Scenedesmus obilquus was used as the rotifer's food, the concentration of 6.0×10 6cells/ml was most favorable for the population growth. The duration of principal developmental stages decreased with the increase of temperature very significantly, but the effect of temperature on the number of eggs produced per life cycle of the rotifer was not significant. At 30℃, the intrinsic rate of population increase was the biggest among the three types of temperature.

关 键 词：萼花臂尾轮虫 食物浓度 温度 种群动态 环境因子 

分 类 号：Q959.181[生物学—动物学] Q178.51