当前位置: X-MOL 学术J. Econ. Entomol. › 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.)
Effect of Chemical Pollution and Parasitism on Heat Tolerance in Dung Beetles (Coleoptera: Scarabaeinae)
Journal of Economic Entomology ( IF 2.2 ) Pub Date : 2020-10-20 , DOI: 10.1093/jee/toaa216
Daniel González-Tokman 1, 2 , Yorleny Gil-Pérez 2 , Mariana Servín-Pastor 3 , Fredy Alvarado 4 , Federico Escobar 2 , Fernanda Baena-Díaz 1 , Carlos García-Robledo 4, 5 , Imelda Martínez-M. 2
Affiliation  

Ecosystem services provided by insects are threatened by recent increasing global temperatures, particularly in the tropics, where insects live close to their thermal limits. Given that tolerance to high temperatures depends on individual metabolism and physiological stress response, it may also be sensitive to other stressors that are common in natural and human-modified environments, such as pollution and parasite pressure. The effects of multiple stressors could be synergistic and can be particularly relevant in insects that provide highly valuable ecosystem services, such as dung beetles in cattle pastures. Here we measured heat tolerance (critical thermal maximum, CTmax) in dung beetles exposed to ivermectin, a toxic parasiticide excreted in cattle dung, with known negative effects on coprophagous fauna, and in beetles exposed to an immune challenge. We also exposed a group of beetles to a combination of both ivermectin and immune challenge to test for potential synergistic effects of both stressors. Contrary to our predictions, CTmax did not change with ivermectin exposure, but increased in immune-challenged beetles. As found in other insects, CTmax was higher in larger beetles, highlighting the importance of body size on thermal tolerance in ectotherms. We discuss potential mechanisms responsible of increased heat tolerance in immune-challenged beetles and highlight the importance of natural and human-induced environmental pressures that now interact with global warming and threaten ecosystem services provided by wild animals.

中文翻译:

化学污染和寄生对粪甲虫耐热性的影响(鞘翅目:金龟子科)

昆虫提供的生态系统服务受到最近全球气温升高的威胁,特别是在热带地区,昆虫生活在接近其热极限的地方。鉴于对高温的耐受性取决于个体的新陈代谢和生理应激反应,它也可能对自然和人类改造环境中常见的其他压力因素敏感,例如污染和寄生虫压力。多种压力因素的影响可能是协同作用的,并且在提供高价值生态系统服务的昆虫中尤其重要,例如牛牧场中的蜣螂。在这里,我们测量了接触伊维菌素的蜣螂的耐热性(临界热最大值,CTmax),伊维菌素是一种在牛粪中排泄的有毒杀虫剂,已知对食粪动物有负面影响,和暴露于免疫挑战的甲虫。我们还将一组甲虫暴露于伊维菌素和免疫攻击的组合中,以测试两种压力源的潜在协同效应。与我们的预测相反,CTmax 不会随着伊维菌素暴露而改变,但在免疫攻击的甲虫中会增加。正如在其他昆虫中发现的那样,大型甲虫的 CTmax 更高,突出了体型对变温动物耐热性的重要性。我们讨论了导致免疫挑战甲虫耐热性增加的潜在机制,并强调了自然和人为环境压力的重要性,这些压力现在与全球变暖相互作用并威胁野生动物提供的生态系统服务。我们还将一组甲虫暴露于伊维菌素和免疫攻击的组合中,以测试两种压力源的潜在协同效应。与我们的预测相反,CTmax 不会随着伊维菌素暴露而改变,但在免疫攻击的甲虫中会增加。正如在其他昆虫中发现的那样,大型甲虫的 CTmax 更高,突出了体型对变温动物耐热性的重要性。我们讨论了导致免疫挑战甲虫耐热性增加的潜在机制,并强调了自然和人为环境压力的重要性,这些压力现在与全球变暖相互作用并威胁野生动物提供的生态系统服务。我们还将一组甲虫暴露于伊维菌素和免疫攻击的组合中,以测试两种压力源的潜在协同效应。与我们的预测相反,CTmax 不会随着伊维菌素暴露而改变,但在免疫攻击的甲虫中会增加。正如在其他昆虫中发现的那样,大型甲虫的 CTmax 更高,突出了体型对变温动物耐热性的重要性。我们讨论了导致免疫挑战甲虫耐热性增加的潜在机制,并强调了自然和人为环境压力的重要性,这些压力现在与全球变暖相互作用并威胁野生动物提供的生态系统服务。正如在其他昆虫中发现的那样,大型甲虫的 CTmax 更高,突出了体型对变温动物耐热性的重要性。我们讨论了导致免疫挑战甲虫耐热性增加的潜在机制,并强调了自然和人为环境压力的重要性,这些压力现在与全球变暖相互作用并威胁野生动物提供的生态系统服务。正如在其他昆虫中发现的那样,大型甲虫的 CTmax 更高,突出了体型对变温动物耐热性的重要性。我们讨论了导致免疫挑战甲虫耐热性增加的潜在机制,并强调了自然和人为环境压力的重要性,这些压力现在与全球变暖相互作用并威胁野生动物提供的生态系统服务。
更新日期:2020-10-20
down
wechat
bug