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2 May 2017 The Influence of Elevated CO2 Concentration on the Fitness Traits of Frankliniella occidentalis and Frankliniella intonsa (Thysanoptera: Thripidae)
He ShuQi, Lin Ying, Qian Lei, Li ZhiHua, Xi Chao, Yang Lu, Gui FuRong
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Abstract

Development and fecundity were investigated in an invasive alien thrips species, Frankliniella occidentalis (Pergande), and a related native species, Frankliniella intonsa (Trybom), under high CO2 concentration. Results show that the two thrips species reacted differently toward elevated CO2 concentration. Developmental duration decreased significantly (11.93%) in F. occidentalis at the CO2 concentration of 800 μl/liter; survival rate of all stages also significantly increased (e.g., survival rate of first instar increased 17.80%), adult longevity of both female and male extended (e.g., female increased 2.02 d on average), and both fecundity and daily eggs laid per female were higher at a CO2 concentration of 800 μl/liter than at 400 μl/liter. Developmental duration of F. intonsa decreased, insignificantly, at a CO2 concentration of 800 μl/liter. Unlike F. occidentalis, survival rate of F. intonsa declined considerably at higher CO2 concentration level (e.g., survival rate of first instar decreased 19.70%), adult longevity of both female and male curtailed (e.g., female reduced 3.82 d on average), and both fecundity and daily eggs laid per female were reduced to 24.86 and 0.83, respectively, indicating that there exist significant differences between the two CO2 levels. Results suggest that the population fitness of invasive thrips species might be enhanced with increase in CO2 concentration, and accordingly change the local thrips population composition with their invasion.

© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
He ShuQi, Lin Ying, Qian Lei, Li ZhiHua, Xi Chao, Yang Lu, and Gui FuRong "The Influence of Elevated CO2 Concentration on the Fitness Traits of Frankliniella occidentalis and Frankliniella intonsa (Thysanoptera: Thripidae)," Environmental Entomology 46(3), 722-728, (2 May 2017). https://doi.org/10.1093/ee/nvx083
Received: 22 December 2016; Accepted: 3 April 2017; Published: 2 May 2017
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