Ecological niche differentiation of two salamanders (Caudata: Hynobiidae) from Hokkaido Island, Japan,Ecological Research

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Ecological niche differentiation of two salamanders (Caudata: Hynobiidae) from Hokkaido Island, Japan
Ecological Research ( IF 1.7 ) Pub Date : 2020-11-21 , DOI: 10.1111/1440-1703.12191
Dung Van Tran _{1,

2} , Shigeharu Terui ₃ , Kazuhiro Nomoto ₄ , Kanto Nishikawa _{1,

5}

Affiliation

Understanding environmental factor determining ecological niche is very important to elucidating the distribution of species, and also revealing how closely related species are able to coexist in a particular region. Here, we applied ecological niche modeling to develop the ecological niches of two hynobiid salamanders: Salamandrella keyserlingii and Hynobius retardatus which are co‐occurring on Hokkaido Island, Japan. We, then, tested hypotheses about ecological niche differentiation between the two species. Our models showed that the potential distribution of S. keyserlingii was strictly limited to a small area at Kushiro Marsh, while the suitable distribution of H. retardatus was covered widely on Hokkaido Island. The results revealed the little geographic range overlap and the differentiation on the requirements of the ecological condition between the two species. We found nonequivalent niches in identity tests and counterintuitive results in background tests, indicating that S. keyserlingii has used a habitat subset of H. retardatus. Overall, our result contributed to understand the ecological niche space, and suggest the historical formation of these species on Hokkaido Island. The models can also be used to aid conservation purposes, such as habitat management, planning and designation of protected areas.

中文翻译：

来自日本北海道岛的两个sal（Caudata：Hynobiidae）的生态位分化

理解决定生态位的环境因素对于阐明物种的分布，以及揭示在特定区域中如何密切相关的物种能够共存非常重要。在这里，我们应用生态位模型开发两个hynobiid蝾螈的生态位：Salamandrella keyserlingii和小鲵retardatus它们共同发生在北海道，日本。然后，我们检验了关于两种物种生态位分化的假说。我们的模型表明S的电位分布。keyerlingii严格限制在Ku路湿地的一小部分地区，而H的适当分布。迟滞在北海道岛上被广泛报道。结果表明，这两个物种之间的地理范围重叠很小，并且对生态条件的要求也有所不同。我们发现在鉴别试验，并在后台测试直观的结果不等效的壁龛，表明小号。keyserlingii使用了H的栖息地子集。迟钝的。总体而言，我们的结果有助于了解生态位空间，并暗示了北海道岛上这些物种的历史形成。这些模型还可用于辅助保护目的，例如栖息地管理，保护区的规划和指定。

更新日期：2020-11-21

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