Wide diurnal temperature variation inhibits larval development and adult reproduction in the diamondback moth
文献类型： 外文期刊
作者： Xing, Kun 1 ; Hoffmann, Ary A. 3 ; Zhao, Fei 1 ; Ma, Chun-Sen 2 ;
作者机构： 1.Shanxi Acad Agr Sci, Inst Plant Protect, Shanxi Key Lab Integrated Pest Management Agr, Taiyuan 030031, Shanxi, Peoples R China
2.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Climate Change Biol Res Grp, Beijing, Peoples R China
3.Univ Melbourne, Sch BioSci, Inst Bio21, Parkville, Vic, Australia
关键词： Temperature; Thermal amplitude; Larval stage; Cross-stage; Plutella xylostella
期刊名称：JOURNAL OF THERMAL BIOLOGY （ 影响因子：2.902； 五年影响因子：3.102 ）
ISSN： 0306-4565
年卷期： 2019 年 84 卷
页码：
收录情况： SCI
摘要： Although thermal variability is known to influence the performance of ectotherms, there is limited information on the influence of variation in diurnal temperature range (DTR) during early developmental stages. Here we test variation in DTR (+/- 0 degrees C, +/- 4 degrees C, +/- 6 degrees C, +/- 8 degrees C, +/- 10 degrees C and +/- 12 degrees C) with a constant mean temperature (25 degrees C) on the larval stage of diamondback moth (DBM), Plutella xylostella (L.), and assess immediate effects on larval development and survival, and delayed effects on pupal development and survival and adult longevity and reproductive performance. Wide amplitudes (+/- 10 degrees C and +/- 12 degrees C) inhibited larval development and adult performance, but increased the proportion of eggs laid early, while moderate amplitudes (+/- 4 degrees C, +/- 6 degrees C and +/- 8 degrees C) resulted in only minor effects. Larval development rate under wide amplitudes ( +/- 10 degrees C and +/- 12 degrees C) was faster than predicted by a degree-hour model. Overall, the intrinsic rate of increase of the population was lowered with increasing DTR, despite mean temperatures being the same. These findings highlight marked cross-stage effects of DTR when temperatures fluctuate substantially, likely linked to maximum temperature, and they emphasize the importance of considering DTR when assessing effects of climate warming.
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