温度和食物浓度对三品系萼花臂尾轮虫实验种群动态的影响

摘要/Abstract

摘要： 应用个体培养方法,研究了温度(20、2和30 ℃)和藻类食物浓度(1.5×10₆、3.0×10₆、6.0×10₆和9.0×10₆ cells·ml^-1)对青岛、芜湖、广州三品系萼花臂尾轮虫种群动态的影响.结果表明,温度仅对轮虫的世代时间和种群内禀增长率有显著影响,而品系对所有生命表参数均无显著影响.轮虫种群的内禀增长率随培养温度的升高而增大,世代时间则随培养温度的升高而缩短.食物浓度仅对轮虫的生命期望值和平均寿命有显著影响,品系对轮虫的净生殖率、世代时间、生命期望值和平均寿命也有显著影响.三品系间,以广州品系轮虫的净生殖率、世代时间、生命期望值和平均寿命最大,芜湖品系最短.当食物浓度为3.0×10₆ cells·ml^-1时,轮虫的生命期望值和平均寿命最长,9.0×10₆ cells·ml^-1时最短.各品系轮虫的净生殖率、世代时间、总生殖率、生命期望值和平均寿命均随培养温度的升高而减小,广州品系的净生殖率除外.轮虫种群的内禀增长率和广州品系轮虫的总生殖率则随培养温度的升高而增大.青岛和广州品系轮虫的各生命表参数,均与食物浓度呈曲线相关,但芜湖品系仅世代时间、平均寿命和生命期望值随食物浓度的增大而缩短.

关键词: 萼花臂尾轮虫, 品系, 温度食物浓度, 生活史参数

Abstract: Effects of temperature (20 ℃,25 ℃,30 ℃) and food concentration (1.5,3.0,6.0,9.0×10⁶ cells·ml^-1) on the population dynamics of Brachionus calyciflorus of Qingdao,Wuhu and Guangzhou strains were studied by means of individual culture.The result showed that the temperature was an important factor affecting generation time and intrinsic rate of population increase.With rising of temperature,the intrinsic rate of population increase increased,but generation time decreased.There were significant effects of food concentration on life expectancy and average lifespan.The effect of strain on net reproductive rate,generation time,life expectancy and average lifespan was also significant.Net reproductive rate,generation time,life expectancy,and average lifespan of Guangzhou strain was all the maximum,and that of Wuhu strain minimum among the three strains.The rotifers fed on the algae at the concentration of 3.0×10⁶ cells·ml^-1 had the longest life expectancy and average lifespan,but those at 9.0×10⁶ cells·ml^-1 had the shortest.Net reproductive rate,generation time,gross reproductive rate,life expectancy,and average lifespan of the three strains decreased linearly with the rise of temperature,except for the net reproductive rate of Guangzhou strain,while the intrinsic rate of population increase of all the three strains and gross reproductive rate of Guangzhou strain increased linearly with the rise of temperature.The relationships between all the life history parameters of Qingdao and Guangzhou strains and food concentration were all curvilinear,however,those between generation time,average lifespan,and life expectancy of Wuhu strain and food concentration could all be described by linear regression.

Key words: Brachionus calyciflorus, Strain, Temperature, Food concentration, Life history parameter

中图分类号:

Q959.181

董丽丽, 席贻龙, 刘桂云, 陈芳, 葛雅丽, 温新利. 温度和食物浓度对三品系萼花臂尾轮虫实验种群动态的影响[J]. 应用生态学报, 2004, (11): 2165-2169.

DONG Lili, XI Yilong, LIU Guiyun, CHEN Fang, GE Yali, WEN Xinli. Effect of temperature and food concentration on the population dynamics of three Brachionus calyciflorus strains[J]. Chinese Journal of Applied Ecology, 2004, (11): 2165-2169.

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