Modelling the climatic niche of turtles: a deep-time perspective.
Modelling the climatic niche of turtles: a deep-time perspective.
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DOI：
10.1098/rspb.2016.1408
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发表时间：
2016-09-28
期刊：
影响因子：
--
通讯作者：
Barrett PM
中科院分区：
文献类型：
--
作者：
Waterson AM;Schmidt DN;Valdes PJ;Holroyd PA;Nicholson DB;Farnsworth A;Barrett PM
外温动物与热环境有着密切的生理联系，因此，未来气候变化对它们的地理分布的影响引起了人们的极大兴趣。在这里，我们使用现代和深时间的化石记录龟类（海龟，陆龟，龟类），以提供现存和灭绝（晚白垩世，马斯特里赫特）类群的生态位限制的气候的第一个测试。生态位模型是用来评估生态位重叠模型预测的关键龟鳖生态类型和家庭。排序框架应用于量化指标的生态位变化（稳定性，扩张和未填充）之间的马斯特里赫特和现在的一天。结果表明，生态位的稳定性在进化的时间尺度不同的龟鳖类分支。起源于早白垩世的群体表现出气候生态位的稳定性，而那些在白垩纪末期多样化的群体则表现出更大的生态位扩张。温度是现代和过去分布的主要驱动力，而降水对淡水龟的分布范围很重要。我们的研究结果表明，龟鳖能够占据比今天更温暖的气候在地质记录。然而，未来环境变化的预计速度和规模，以及其他保护威胁，对驯化或适应提出了挑战。
Ectotherms have close physiological ties with the thermal environment; consequently, the impact of future climate change on their biogeographic distributions is of major interest. Here, we use the modern and deep-time fossil record of testudines (turtles, tortoises, and terrapins) to provide the first test of climate on the niche limits of both extant and extinct (Late Cretaceous, Maastrichtian) taxa. Ecological niche models are used to assess niche overlap in model projections for key testudine ecotypes and families. An ordination framework is applied to quantify metrics of niche change (stability, expansion, and unfilling) between the Maastrichtian and present day. Results indicate that niche stability over evolutionary timescales varies between testudine clades. Groups that originated in the Early Cretaceous show climatic niche stability, whereas those diversifying towards the end of the Cretaceous display larger niche expansion towards the modern. Temperature is the dominant driver of modern and past distributions, whereas precipitation is important for freshwater turtle ranges. Our findings demonstrate that testudines were able to occupy warmer climates than present day in the geological record. However, the projected rate and magnitude of future environmental change, in concert with other conservation threats, presents challenges for acclimation or adaptation.
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影响因子：
56.9
作者：
Chen, I-Ching;Hill, Jane K.;Thomas, Chris D.
通讯作者：
Thomas, Chris D.
影响因子：
0.6
作者：
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通讯作者：
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作者：
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作者：
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通讯作者：
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