Loss of largest and oldest individuals of the Montpellier snake correlates with recent warming in the southeastern Iberian Peninsula.
Loss of largest and oldest individuals of the Montpellier snake correlates with recent warming in the southeastern Iberian Peninsula.
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DOI：
10.1093/cz/zow112
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发表时间：
2017-12
期刊：
影响因子：
2.2
通讯作者：
Pleguezuelos JM
中科院分区：
文献类型：
--
作者：
López-Calderón C;Feriche M;Alaminos E;Pleguezuelos JM
气候变化对生物的影响目前正在许多不同的分类群中进行广泛的研究。然而，身体大小的变化，通常是由于温度升高而收缩，很少受到爬行动物的关注。在过去的全球变暖期间，许多生物体的大小缩小，目前的证据和操纵温度的实验表明，随着温度的升高，一些生物体的生物量减少。在这里，我们测试是否从伊比利亚半岛东南部的蒙彼利埃蛇Malpolon monspessulanus的身体大小正在变化，并与该地区的温度上升在39年的时间（1976年至2014年）。我们测量了科学收藏品中凭证的口鼻长度（SVL），以检查与温度相关的人口水平上成人体型的趋势，同时控制个体的年龄（通过骨骼年代学估计，n =141）。由于研究物种的个体发育差异很大，我们将年龄分为三类：“年轻成年人”（5岁以下），“中间成年人”（5至7岁）和“老年人”（8至14岁）。通过线性混合模型，我们发现“老年人”的SVL和该地区的年平均温度在每个人的一生中的负相关关系。我们的研究结果表明，最大和最古老的个体的蒙彼利埃蛇，也就是说，男性，因为强大的性别大小二型性在这个物种中，从研究人群中消失，并表明它发生在响应环境温度上升。
The effects of climate change on organisms are now being extensively studied in many different taxa. However, the variation in body size, usually shrinkage in response to increasing temperature, has received little attention regarding to reptiles. During past periods of global warming, many organisms shrank in size, and current evidence and experiments manipulating temperature have shown a biomass decrease in some organisms with increasing temperatures. Here we test whether the body size of the Montpellier snake Malpolon monspessulanus from the southeastern Iberian Peninsula is changing and correlated with the increasing temperature in this region during a 39-year period (1976–2014). We measured the snout–vent length (SVL) of vouchers in scientific collections to check for trends in adult body size at the population level in relation with temperature, while controlling for the age of the individuals (estimated by skeletochronology, n =141). Given the great ontogenetic variation in body size of the study species, we categorized age in 3 classes: “young adults” (under 5 years old), “intermediate adults” (from 5 to 7 years old), and “old adults” (from 8 to 14 years old). By means of linear mixed models, we found a negative relationship between SVL of “old adults” and average annual temperature in the region during the lifetime of each individual. Our results indicate that largest and oldest individuals of the Montpellier Snake, that is, males because of strong sexual size dimorphism in this species, disappeared from the study population, and suggest that it occurred in response to rising environmental temperature.
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影响因子：
2.7
作者：
BLUEWEISS, L;FOX, H;SAMS, S
通讯作者：
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作者：
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