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首页> 外文期刊>Marine ecology progress series >Large-scale distribution analysis of Antarctic echinoids using ecological niche modelling
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Large-scale distribution analysis of Antarctic echinoids using ecological niche modelling

机译：利用生态位建模对南极类棘突类动物进行大规模分布分析

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摘要

Understanding the factors that determine the distribution of taxa at various spatial scales is a crucial challenge in the context of global climate change. This holds particularly true for polar marine biota that are composed of both highly adapted and vulnerable faunas. We analysed the distribution of 2 Antarctic echinoid species, Sterechinus antarcticus and S. neumayeri, at the scale of the entire Southern Ocean using 2 niche modelling procedures. The performance of distribution models was tested with regard to the known ecology of the species. The respective contributions of environmental parameters are discussed along with the putative roles played by biotic interactions and biogeographic processes. Depth was the parameter that contributed most to both distribution models, whereas sea ice coverage and sea surface temperature had significant contributions for S. neumayeri only. Suitability maps of the 2 species were mostly similar, with a few notable differences. The Campbell Plateau and Tasmania were predicted as suitable areas for S. antarcticus only, while S. neumayeri was restricted to the south of the Antarctic Polar Front. However, numerous sampling data attest that S. antarcticus is absent from the Campbell Plateau and from Tasmania. Different hypotheses are formulated to explain the mismatch between observed and modelled distribution data. They stress the putative roles played by both oceano-graphic barriers to dispersal (Antarctic Polar Front), biotic factors (species exclusion patterns) and biogeographic processes (ongoing dispersal).
机译：在全球气候变化的背景下，了解决定分类单元在不同空间尺度上分布的因素是一项至关重要的挑战。对于由高度适应和脆弱的动物组成的极地海洋生物群尤其如此。我们使用2种利基模型程序分析了整个南大洋的2种南极棘皮类物种，Sterechinus antarcticus和S. neumayeri的分布。关于物种的已知生态测试了分布模型的性能。讨论了环境参数的各自贡献以及生物相互作用和生物地理过程所发挥的假定作用。深度是对两个分布模型都贡献最大的参数，而海冰覆盖率和海面温度仅对中型链球菌有重要贡献。这两个物种的适宜性图大部分相似，但有一些显着差异。据预测，坎贝尔高原和塔斯马尼亚州仅是南极链球菌的合适区域，而纽马耶里链球菌则被限制在南极极地锋的南部。但是，许多采样数据证明坎贝尔高原和塔斯马尼亚州均没有南极链球菌。提出了不同的假设来解释观察到的和建模的分布数据之间的不匹配。他们强调了海洋图形障碍对传播（南极极地锋），生物因素（物种排斥模式）和生物地理过程（正在进行的传播）的假定作用。

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