Evaluation on the fitness and population projection of Nilaparvata lugens in response to elevated CO2 using two-sex life table |
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| Authors: | Dong Wen Jinping Liu Shuai Fan Gang Wu |
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| Institution: | Hubei Key Laboratory of Insect Resource Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China |
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| Abstract: | AbstractThe life history and fitness of Nilaparvata lugens being reared under ambient level (current CO2 concentration), medially elevated (550?µL/L) and highly elevated (750?µL/L) CO2 concentration for long-term generation were compared using two-sex life table instead of traditional age-specific life table. The results showed that significantly longer larval duration and lower fecundity of N. lugens were observed in 750?µL/L relative to 550?µL/L treatment (P?<?0.05). Accordingly, 550?µL/L CO2 significantly enhanced population parameters of N. lugens, including significantly higher intrinsic rate of increase (r), finite rate (λ) and net reproductive rate (RO), but not for 750?µL/L CO2. Taken together, N. lugens performs enhanced development rate, fecundity and survival in individual life history and higher potential in population multiplication under 550?µL/L CO2 level, while only indicates the less enhanced development rate and survival without significant increased capacity of population expansion under 750?µL/L CO2 level. These results should facilitate predicting the fitness and potential population damage of N. lugens, which is valuable for the integrated control of N. lugens in the future increasing CO2 concentration. |
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| Keywords: | Elevated CO2 Nilaparvata lugens two-sex life table fitness population projection |
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