Thermal tolerance in the millipede Euryurus leachii Gray (Polydesmida: Euryuridae)
Thermal tolerance in the millipede Euryurus leachii Gray (Polydesmida: Euryuridae)
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千足虫 Euryurus leachii Grey（多足纲：Euryuridae）的热耐受性
DOI：
10.1093/aesa/saac010
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发表时间：
2022
影响因子：
2.3
通讯作者：
Yanoviak, Stephen P
中科院分区：
文献类型：
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作者：
Barnes, Lindsey A;Lawhorn, Kane A;Yanoviak, Stephen P
极端温度往往会限制动物的分布。虽然一些变温动物(例如有翼昆虫)可以逃脱当地的极端高温，但许多不那么游荡的生物(例如昆虫幼虫和节肢动物的扩散能力有限)受制于当地的微环境条件。在这里，我们量化了一种丰富的、地方性的、线虫(Euryurus Leachi)的热耐性，并探讨了季节性、质量和性别对其临界热极值(CTmax)的影响。我们还测量了代表不同腐烂级别的枯木的热微环境。总体而言，该物种的平均CTmax约为40.5°C。质量和性别对千足虫的CTmax没有影响。然而，秋季采集的千足虫的最大平均CT值比春季采集的个体高0.6℃。一种裸露的干木，代表着一个共同的小生境。水母很容易变暖，温度超过了它的最大温度。结果表明，CTmax是一种季节性可塑性性状。小气候条件潜在地限制了该物种的当地分布。随着栖息地的碎片化和气候变化导致森林系统变暖，了解像E。利阿契亚帮助预测群落组成和生态系统过程中的潜在变化。
Temperature extremes often limit animal distributions. Whereas some poikilotherms (e.g., winged insects) can escape local thermal extremes, many less vagile organisms (e.g., insect larvae and arthropods with limited dispersal ability) are at the mercy of local microenvironmental conditions. Here, we quantified the thermal tolerance of an abundant, endemic, Nearctic millipede (Euryurus leachii), and explored the effects of seasonality, mass, and sex on its critical thermal maxima (CTmax). We also measured the thermal microenvironments of dead wood representing different decay classes. Overall, the mean CTmaxfor this species was ca. 40.5°C. Mass and sex had no effect on millipede CTmax. However, the mean CTmaxfor millipedes collected in the fall was 0.6°C higher than for individuals collected in the spring. An exposed dry log representing one common microhabitat forE. leachiireadily warmed to temperatures exceeding its CTmax. The results suggest that CTmaxis a seasonally plastic trait inE. leachiiand that microclimatic conditions potentially limit the local distribution of this species. With habitat fragmentation and climate change contributing to warmer temperatures in forested systems, understanding the responses of detritivores likeE. leachiican help predict potential shifts in community composition and ecosystem processes.