当前位置: X-MOL 学术J. Chem. Ecol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Temperature Affects Chemical Defense in a Mite-Beetle Predator-Prey System.
Journal of Chemical Ecology ( IF 2.3 ) Pub Date : 2020-09-02 , DOI: 10.1007/s10886-020-01212-3
Christoph Merkel 1 , Michael Heethoff 1 , Adrian Brückner 2
Affiliation  

Temperature influences all biochemical and biophysiological processes within an organism. By extension, it also affects those ecological interactions that are mediated by gland-produced chemical compounds, such as reservoir-based chemical defense. Herein, we investigate how environmental temperature affects the regeneration of defensive secretions and influences the efficacy of chemical defense in a model predator-prey system: the oribatid mite Archegozetes longisetosus and the predaceous rove beetle Stenus juno. Through a combination of chemical analyses, non-linear regression modeling and theoretical simulations we show that the amount of defensive secretion responded to temperature in a unimodal optimum curve: the regeneration rate followed a positive, linear relationship up to 35 °C, but rapidly broke down beyond this temperature (“tipping point” effect). Using functional response simulations, there is an initially positive dampening effect on the predation rate when regeneration is optimal, but at higher temperatures chemical defense does not counteract the previously described effects of elevated predatory pressure. In a larger context, our results demonstrate the need to integrate relevant environmental factors in predator-prey modeling approaches.



中文翻译:

温度影响螨虫-甲虫捕食者-猎物系统中的化学防御。

温度会影响生物体内的所有生物化学和生物生理过程。通过扩展,它也影响由腺体产生的化学化合物介导的那些生态相互作用,例如基于油藏的化学防御。在这里,我们研究环境温度如何影响捕食者-捕食者模型系统中的化学防御的功效:原始螨类Archegozetes longisetosus早熟甲虫Stenus juno。通过化学分析,非线性回归模型和理论模拟的结合,我们表明防御分泌物的量在单峰最佳曲线中对温度作出响应:在高达35°C的温度下,再生速率呈正线性关系,但迅速破裂超过此温度(“临界点”效应)。使用功能响应模拟,当再生最佳时,最初会对捕食速率产生积极的阻尼作用,但在较高温度下,化学防御作用无法抵消先前描述的掠食压力升高的影响。在更大的范围内,我们的结果表明需要将相关的环境因素整合到捕食者-猎物建模方法中。

更新日期:2020-09-02
down
wechat
bug