Micro and macroclimatic constraints on the activity of a vulnerable tortoise: A mechanistic approach under a thermal niche view
Micro and macroclimatic constraints on the activity of a vulnerable tortoise: A mechanistic approach under a thermal niche view
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对脆弱陆龟活动的微观和宏观气候限制：热生态位视角下的机械方法
DOI：
10.1111/1365-2435.14148
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发表时间：
2022
影响因子：
5.2
通讯作者：
Sinervo, Barry
中科院分区：
文献类型：
--
作者：
Lara‐Reséndiz, Rafael A.;Miles, Donald B.;Rosen, Philip C.;Sinervo, Barry
环境施加的热限制限制了外胚层动物的活动时间，一直是生态生理学研究的中心问题。评估这些限制是确定物种对变化的热生态位的脆弱性和制定保护策略的关键。我们基于生物重要时期的热生理学参数和环境工作温度，在微观和宏观气候尺度上建立了一个显式的乌龟热限制模型。作为研究模型，我们以墨西哥西北部热带干燥森林为主要栖息地的脆弱种地鼠为研究模型，我们的机理模型是基于5 年的环境工作温度(Te)的监测。这里，我们使用活动小时数(Ha)和热限制小时数(Hr)，这是根据G的自愿温度范围计算得出的。Evgoodei关于手提箱，以投射和比较跨越空间和时间的热约束。此外，利用2070年的悲观气候变化情景(RCP 8.5)对该模型进行了预测。结果表明，气候变化的活动周期。Haandhr预测的evgoodei受到Tee的频率和可获得性的限制，并且在一年中和不同年份之间差异显著。此外，在RCP 8.5情景下，我们预测该物种的活动时间将显著增加并超过临界值(3.1小时)，将该物种列为高度脆弱物种。我们讨论并比较了潜在活动周期、温度调节策略以及与其他Gopherus物种的成本和收益。最后，我们确定了其范围内的关键区域，以制定保护这种墨西哥地方性乌龟的管理策略。阅读华尔街日报博客上这篇文章的免费简单语言摘要。
Thermal constraints imposed by the environment limit the activity time of ectotherms and have been a central issue in ecophysiology. Assessing these restrictions is key to determining the vulnerability of species to changing thermal niches and developing conservation strategies.We generate an explicit tortoise model of thermal constraints at both micro and macroclimate scales based on thermophysiology parameters and environmental operative temperatures during a biologically significant period. As a study model, we use a vulnerable species of gopher tortoiseGopherus evgoodei, whose primary habitat is the tropical dry forests in northwestern Mexico.Our mechanistic model is based on a monitoring of 5 years of environmental operative temperatures (Te). Here, we use the hours of activity (ha) and hours of thermal restriction (hr), calculated from the voluntary temperature range ofG. evgoodeiwith respect toTe, to project and compare the thermal constraints across space and time. In addition, this model was projected using a pessimistic climate change scenario for 2070 (RCP 8.5).The results show that the period of activity ofG. evgoodei, predicted byhaandhr, is limited by the frequency and availability ofTeand differs significantly throughout the year and among years. In addition, under the RCP 8.5 scenario, we predict thathrwill increase considerably and exceed the critical value (3.1hr) placing this species as highly vulnerable.We discuss and compare the period of potential activity, thermoregulation strategies, and costs and benefits with otherGopherusspecies. Finally, we identify critical areas throughout its range to develop management strategies for protecting this Mexican endemic tortoise.Read the free Plain Language Summary for this article on the Journal blog.