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首页> 外文期刊>Estuarine Coastal and Shelf Science >Altered niche of an ecologically significant urchin species, Centrostephanus rodgersii, in its extended range revealed using an Autonomous Underwater Vehicle
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Altered niche of an ecologically significant urchin species, Centrostephanus rodgersii, in its extended range revealed using an Autonomous Underwater Vehicle

机译：使用自主水下航行器揭示了具有生态学意义的野孩子物种罗氏沼虾在扩展范围内的生态位改变

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Poleward range shifts of species as a result of global climate change are being increasingly documented. As species extend into new ranges their ecological impacts and the niches that they occupy may be unpredictable. We use benthic imagery obtained from the broad-scale deployment of an Autonomous Underwater Vehicle (AUV) to quantify the depth distribution of barrens habitat formed by a recent range extension of the sea urchin species, Centrostephanus rodgersii, a known ecosystem engineer. AUV transects covering similar depths from both the historical range of New South Wales, Australia, and from the range extension area of the east coast of Tasmania were examined for the presence of barrens. We find that C. rodgersii occupies a different realised niche in its extended range, with barrens habitat occurring significantly deeper in Tasmanian waters (16-58 m) compared to NSW waters (7-27 m). The expansion of barrens habitat has devastating impacts on biodiversity, with flow-on effects to ecosystem services and local fisheries, and in Tasmania this threat extends to deeper, invertebrate-dominated habitats. This finding has important management implications, in particular the need to incorporate deeper reef systems into planning, with increased barrens expected under future climate change predictions. One conservation management approach is the use of no-take Marine Protected Areas (MPAs) to prevent barren establishment in representative habitats by rebuilding viable populations of urchin predators. We also examine the correlation between MPA status and the occurrence of barrens within a small, no-take Tasmanian reserve and adjacent control sites. We find that there is suggestive, but inconclusive, evidence for fewer barrens in the MPA (p = 0.07). Our study highlights the utility of a novel technology for conducting large-scale benthic surveys and monitoring the impacts of range extending species. (C) 2015 Elsevier Ltd. All rights reserved.
机译：由于全球气候变化，物种的极差范围变化越来越多地被记录在案。随着物种扩展到新的范围，它们的生态影响和它们占据的生态位可能无法预测。我们使用从自动水下航行器（AUV）的大规模部署中获得的底栖图像来量化由最近的海胆物种范围扩展，已知的生态系统工程师Centrostephanus rodgersii形成的贫瘠栖息地的深度分布。检查了澳大利亚新南威尔士州的历史范围和塔斯马尼亚州东海岸的范围扩展区域覆盖相似深度的AUV断面是否存在贫瘠。我们发现罗氏梭菌在其扩展范围内占有不同的已实现生态位，与新南威尔士州水域（7-27 m）相比，塔斯马尼亚水域（16-58 m）的贫瘠栖息地明显更深。贫瘠的栖息地的扩大对生物多样性具有破坏性影响，对生态系统服务和当地渔业产生持续影响，在塔斯马尼亚州，这一威胁扩展到更深的，以无脊椎动物为主的栖息地。这一发现具有重要的管理意义，特别是需要将更深的珊瑚礁系统纳入规划之中，而在未来的气候变化预测下，贫瘠的土地有望增加。一种保护管理方法是使用不带捕捞的海洋保护区（MPA），以通过重建可行的顽童掠食者种群来防止在有代表性的栖息地建立贫瘠的土地。我们还检查了MPA状态与塔斯马尼亚小的禁区和邻近控制地点内贫瘠土地的发生之间的相关性。我们发现，MPA中的贫瘠土地较少（p = 0.07），这是有启发性的但尚无定论的证据。我们的研究强调了一种新技术在进行大规模底栖动物调查和监测范围扩大物种的影响方面的实用性。 （C）2015 Elsevier Ltd.保留所有权利。

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