Elevational partitioning in species distribution, abundance and body size of Australian alpine grasshoppers (Kosciuscola),Austral Ecology

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Elevational partitioning in species distribution, abundance and body size of Australian alpine grasshoppers (Kosciuscola)
Austral Ecology ( IF 1.6 ) Pub Date : 2020-03-10 , DOI: 10.1111/aec.12876
Sonu Yadav ₁ , Adam Stow ₁ , Rachael Y. Dudaniec ₁

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Changes in the physical environment with elevation can influence species distributions and their morphological traits. In mountainous regions, steep temperature gradients can result in patterns of ecological partitioning among species that potentially increases their vulnerability to climate change. We collected data on species distributions, relative abundance and body size for three grasshopper species of the genus Kosciuscola (K. usitatus, K. tristis and K. cognatus) at three locations within the mountainous Kosciuszko National Park in Australia (Thredbo, Guthega and Jagungal). All three species showed differences in their distributions according to elevation, with K. usitatus ranging from 1400 to 2000 m asl, K. tristis from 1600 to 2000 m asl and K. cognatus from 1550 to 1900 m asl. Decreasing relative abundance with increasing elevation was found for K. usitatus, but the opposite pattern was found for K. tristis. The relative abundance of K. cognatus did not change with elevation but was negatively correlated with foliage cover. Body size decreased with elevation in both male and female K. usitatus, which was similarly observed in female K. tristis and male K. cognatus. Our results demonstrate spatial partitioning of species distributions and clines in body size in relation to elevational gradients. Species‐specific sensitivities to climatic gradients may help to predict the persistence of this grasshopper assemblage under climate change.

中文翻译：

澳大利亚高山蚱hopper（Kosciuscola）的物种分布，丰度和体型上的高空划分

物理环境随海拔的变化会影响物种分布及其形态特征。在山区，陡峭的温度梯度会导致物种间生态分区的模式，从而可能增加其对气候变化的脆弱性。我们收集物种分布，相对丰度和车身尺寸数据属三种蝗虫Kosciuscola（K. usitatus，K. tristis和K. cognatus在澳大利亚（擂，Guthega和Jagungal山区哥斯高国家公园内的三个位置））。这三个物种都显示出根据海拔的不同分布，其中K. usitatus范围2000至00年m左右，K. tristis 2000至00年m左右和K. cognatus 1550年至1900年m左右。减小相对丰度与不断增加的高度被发现的K. usitatus，但被发现的相反图案K. tristis。科涅克白兰地的相对丰度没有随海拔升高而变化，但与叶面覆盖度呈负相关。雄性和雌性K. usitatus的体型均随海拔的升高而减小，雌性K. tristis和雄性K. cognatus的观察结果相似。我们的结果证明了物种分布的空间划分和身体大小与海拔梯度有关。物种对气候梯度的敏感性可能有助于预测这种蚱hopper组合在气候变化下的持久性。

更新日期：2020-03-10

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