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标题：Effect of Available Food and Temperature on the Growth and Reproduction of Daphnia rosea
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作者：Ping Xie ; Toshio Iwakuma ; Koichi Fujii 等
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2000
卷号：15
期号：3
页码：379-388
DOI：10.1080/02705060.2000.9663756
出版社：Taylor & Francis
摘要：Population parameters of Daphnia rosea were studied at various concentrations of Chlorella sp. (0.25, 0.75 and 3.0 mg C 1 -1 ) at several temperatures (20, 25, 28, and 30 °C) in the laboratory. Although there were some differences in the degrees of the effects of the various temperature-food combinations, both food and temperature exerted influences on almost all of the main population parameters of D. rosea. At a water temperature of 28 °C, growth and reproduction were reduced, and at the lowest food level (0.25 mgC 1 -1 ), reproduction failed. D. rosea did not survive at 30 °C in spite of abundant food supply, indicating that 30 °C is a physiological limit. A positive relationship between body length and brood size was recognized at high and medium food levels. The slope of the regression was the highest at the highest food level and at the lowest temperature (20 °C). The low food level exerted a negative influence on the net reproductive rate by lowering the size of egg-bearing females, by decreasing the brood size of each size class, by decreasing the brood number per female, and by increasing the period of empty brood chamber. High water temperature (28 °C) also exerted a negative influence on the net reproductive rate in a similar way. For the better understanding of the key factors driving the midsummer dynamics of daphnids in the field, it may be of crucial importance to compare the population parameters of the field populations with experimentally derived values under controlled conditions of food concentration and temperature.