气温升高有利于抑制防御的食草动物

IF 4.3 1区 农林科学 Q1 ENTOMOLOGY
Jéssica Teodoro-Paulo, Jacques A. Deere, João Valeriano-Santos, Steven Charlesworth, Alison B. Duncan, Merijn R. Kant, Juan M. Alba
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引用次数: 0

摘要

据预测,气候变化导致的气温升高将加速节肢动物食草动物的生命周期,从而加剧害虫的形成。蜘蛛螨等臭名昭著的害虫在气温较高(32-35 °C)的地区生长旺盛,据预测,未来几十年此类地区的面积和数量都将扩大。温度升高会直接加速害虫数量的增长,但也会通过改变植物的防御机制间接影响害虫。事实证明,蜘蛛螨能适应植物的防御机制,自然选择有利于抑制防御的特性。然而,人们还不知道气温升高会在多大程度上影响蛛螨的抑制作用,也不知道这将如何影响蛛螨的适应速度和害虫危害。在这项研究中,我们调查了两种温度(25 °C和32 °C)对蜘蛛螨与番茄相互作用的影响,并预测了温度升高对有利于适应防御的螨类的影响。我们发现,所有螨株在 32 °C时对植物造成的损害都更大,但温度并不影响防御基因诱导和抑制的总体模式。虽然 32 °C时所有螨株的繁殖率都较高,但幼螨和成螨的存活率都较低,尤其是诱导螨。根据这些数据,我们对两个品系三个月的种群模型进行了参数化,结果表明,在较高温度下,抑制螨可能会取代诱导螨,无论是在温度恒定时还是在热浪形式下。我们的模型预测,在温度较高的地区,防御抑制螨会受到青睐,这将加速害虫的形成,从而刺激害虫的繁殖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Rising temperatures favour defence-suppressing herbivores

Rising temperatures favour defence-suppressing herbivores

Rising temperatures due to climate change are predicted to accelerate the life cycle of arthropod herbivores thereby exacerbating pest formation. Notorious pests like spider mites thrive in areas with high temperatures (32–35 °C), and it is predicted that the size and number of such areas will expand in the coming decades. Higher temperatures can directly accelerate population growth, but also indirectly affect them through changes in the plant's defensive mechanisms. Spider mites have been shown to adapt to plant defences, with natural selection favouring defence-suppressing traits. However, it is not known to what extent suppression is affected by rising temperatures and how this might tie into the rate of adaptation and pest damage. In this study, we investigated the effect of two temperatures (25 °C and 32 °C), on the spider mite–tomato interaction, predicting the influence of rising temperatures on favouring defence-adapted mites. We found that all mite strains caused more plant damage at 32 °C, but temperature did not affect the overall patterns of induction and suppression of defence genes. Although fecundity was higher for all strains at 32 °C, juvenile and adult survival was lower, especially for inducer mites. With these data, we parametrized population models for the two strains over three months, indicating that suppressor mites might displace inducers at the higher temperature, either when it is constant or in the form of heat waves. Our models predict that in areas with higher temperatures, defence-suppressing mites are favoured, which will accelerate and consequently spur pest formation.

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来源期刊
Journal of Pest Science
Journal of Pest Science 生物-昆虫学
CiteScore
10.40
自引率
8.30%
发文量
114
审稿时长
6-12 weeks
期刊介绍: Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues. Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates. Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management. Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.
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