联邦濒危沙漠蜥蜴的水生生理和生态学。

IF 2.6 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION
Conservation Physiology Pub Date : 2024-05-06 eCollection Date: 2024-01-01 DOI:10.1093/conphys/coae019
Savannah J Weaver, Ian J Axsom, Lindsay Peria, Tess McIntyre, Justin Chung, Rory S Telemeco, Michael F Westphal, Emily N Taylor
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引用次数: 0

摘要

动物对极端气候的反应可以是行为上的回避,也可以是生理上的应对。我们了解行为和生理上的体温调节,但在很大程度上却忽视了水分平衡。气候变化包括全球变暖和降水机制的变化,因此提高我们对生物体水分平衡的认识变得越来越迫切。我们通过测量皮肤蒸发失水(CEWL)、血浆渗透压和身体状况,评估了美国联邦濒危物种钝鼻豹蜥的水分生理。测量是在钝鼻豹蜥蜴的整个活动季节进行的,这是一年中这些蜥蜴能在地面上发现的短暂时期。与中温带物种相比,G. sila的CEWL较低,这可能是对沙漠的适应,而血浆渗透压较高,这可能是脱水的迹象。我们假设,在西拉蛙的整个活动季节,随着其栖息地变得更热、更干燥,西拉蛙会变得更加脱水和不透水。相反,雌性的CEWL和血浆渗透压变化极小,雄性则呈非线性变化,我们假设这与性别特异性繁殖行为和食物供应变化有关。我们还测量了体温调节和微生境的使用,预计脱水程度越高的蜥蜴体温越低,体温调节的准确性越差,在地面上停留的时间越短。然而,我们没有发现 CEWL、血浆渗透压或身体状况对这些热和行为指标有任何影响。最后,西拉蛙在洞穴中度过了相当长的地下时间,洞穴可能不仅是重要的热庇护所,也是水文庇护所。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydric physiology and ecology of a federally endangered desert lizard.

Animals can respond to extreme climates by behaviourally avoiding it or by physiologically coping with it. We understand behavioural and physiological thermoregulation, but water balance has largely been neglected. Climate change includes both global warming and changes in precipitation regimes, so improving our understanding of organismal water balance is increasingly urgent. We assessed the hydric physiology of US federally endangered blunt-nosed leopard lizards (Gambelia sila) by measuring cutaneous evaporative water loss (CEWL), plasma osmolality and body condition. Measurements were taken throughout their active season, the short period of year when these lizards can be found aboveground. Compared to a more mesic species, G. sila had low CEWL which is potentially desert-adaptive, and high plasma osmolality that could be indicative of dehydration. We hypothesized that throughout the G. sila active season, as their habitat got hotter and drier, G. sila would become more dehydrated and watertight. Instead, CEWL and plasma osmolality showed minimal change for females and non-linear change for males, which we hypothesize is connected to sex-specific reproductive behaviours and changes in food availability. We also measured thermoregulation and microhabitat use, expecting that more dehydrated lizards would have lower body temperature, poorer thermoregulatory accuracy and spend less time aboveground. However, we found no effect of CEWL, plasma osmolality or body condition on these thermal and behavioural metrics. Finally, G. sila spends considerable time belowground in burrows, and burrows may serve not only as essential thermal refugia but also hydric refugia.

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来源期刊
Conservation Physiology
Conservation Physiology Environmental Science-Management, Monitoring, Policy and Law
CiteScore
5.10
自引率
3.70%
发文量
71
审稿时长
11 weeks
期刊介绍: Conservation Physiology is an online only, fully open access journal published on behalf of the Society for Experimental Biology. Biodiversity across the globe faces a growing number of threats associated with human activities. Conservation Physiology will publish research on all taxa (microbes, plants and animals) focused on understanding and predicting how organisms, populations, ecosystems and natural resources respond to environmental change and stressors. Physiology is considered in the broadest possible terms to include functional and mechanistic responses at all scales. We also welcome research towards developing and refining strategies to rebuild populations, restore ecosystems, inform conservation policy, and manage living resources. We define conservation physiology broadly and encourage potential authors to contact the editorial team if they have any questions regarding the remit of the journal.
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