Inter-specific differences in survival and reproduction of cladocerans to nitrite gradient and the ecological implications

被引:13
作者
Lyu, Kai [1 ]
Wang, Qianqian [1 ]
Chen, Rui [1 ]
Lu, Qiuli [1 ]
Yang, Zhou [1 ]
机构
[1] Nanjing Normal Univ, Coll Life Sci, Jiangsu Key Lab Biodivers & Biotechnol, Nanjing 210046, Jiangsu, Peoples R China
关键词
Daphnia; Logistic model; Nitrite; Reproduction; Survival; CONCENTRATION-RESPONSE FUNCTION; DAPHNIA-MAGNA; ACUTE TOXICITY; EXPOSURE; AMMONIA; ECOSYSTEMS; WATER; SIMILOIDES; POLLUTION; ANIMALS;
D O I
10.1016/j.bse.2012.12.002
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The aim of this study was to assess the inter-specific differences in survival and reproduction traits of two species of cladocerans to nitrite gradient. Daphnia similis and Daphnia magna were exposed to different nitrite levels for 21 days. Results showed that survival time, number of moults, clutches per female, offspring per clutch, and total offspring per female decreased significantly with increasing nitrite concentration. The negative effects of nitrite on life-history traits of the two Daphnia species were dose-dependent and can be fitted by three-parameter logistic model. According to the model, the EC(50)s of survival time, number of moults, clutches per female, offspring per clutch, and total offspring per female for D. similis were 8.1, 7.1, 5.0, 4.4, 3.1 mg L-1, respectively, whereas those for D. magna were 3.9, 3.7, 2.3, 1.2, and 1.1 mg L-1, respectively, suggesting the tolerances of the two Daphnia species to nitrite are inter-specific. (C) 2012 Elsevier Ltd. All rights reserved.
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页码:151 / 156
页数:6
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