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首页> 外文期刊>Estuarine Coastal and Shelf Science >Biotic interactions affect the colonization behavior of aquatic detritivorous macroinvertebrates in a heterogeneous environment
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Biotic interactions affect the colonization behavior of aquatic detritivorous macroinvertebrates in a heterogeneous environment

机译：生物相互作用影响异质环境中水生有害无脊椎动物的定殖行为

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It has previously been suggested that macroinvertebrates actively search for suitable patches to colonize. However, it is not well understood how the spatial arrangement of patches can affect colonization rates. In this study, we determined the importance of the environmental factors (distance, connectivity and resource availability) for patch colonization in an experimental system using Gammarus aequicauda (Amphipoda), Lekanesphaera hookeri (Isopoda) and Ecrobia ventrosa (Gastropoda). Furthermore, we also assessed how the relative importance of each of these environmental factors differed in interactions between the three species. The single species experiments showed that distance was the most important factor for G. aequicauda and E. ventrosa. However, while E. ventrosa preferred patches close to the release point, G. aequicauda strongly preferred patches further from the release point. High resource availability was a strong determinant for the patch colonization of G. aequicauda and L hookeri. Connectivity was only of moderate importance in the study system for L hookeri and E. ventrosa. The effects of the environmental factors were strongly affected by interspecific interactions in the multispecies experiments. For G. aequicauda, the distance preference was lowered in the presence of E. ventrosa. Moreover, while for L hookeri the effect of resource availability was ruled out by the species interactions, resource availability gained importance for E. ventrosa in the presence of any of the other species. Our results suggest a strong link between environmental factors and biotic interactions in the colonization of habitat patches and indicate that the effect of biotic interactions is especially important for species sharing similar traits. (C) 2015 Elsevier Ltd. All rights reserved.
机译：先前已经提出，大型无脊椎动物主动寻找合适的斑块来定殖。然而，人们对斑块的空间排列如何影响定居率还没有很好的了解。在这项研究中，我们确定了环境因子（距离，连通性和资源可用性）对于使用γ拟南芥（Amphipoda），Lekanesphaera hookeri（Isopoda）和Ecrobia ventrosa（Gastropoda）的实验系统中斑块定植的重要性。此外，我们还评估了这三个环境因素在三个物种之间的相互作用中相对重要性的差异。单物种实验表明，距离是马齿a和马齿vent的最重要因素。然而，尽管文氏肠球菌优选贴近释放点的贴片，但马兜铃野牛强烈优选远离释放点的贴片。资源的高可用性是马鞭草和钩虫的斑块定殖的重要决定因素。在霍克氏菌和文氏大肠杆菌的研究系统中，连接性仅具有中等重要性。在多物种实验中，种间相互作用强烈地影响了环境因素的影响。对于Gequ aequicauda，在存在E. ventrosa时，距离偏好降低。此外，尽管对于L hookeri，物种之间的相互作用排除了资源可利用性的影响，但是在存在其他任何物种的情况下，资源可利用性对于文氏肠杆菌变得越来越重要。我们的研究结果表明环境因素与生境斑块定居过程中的生物相互作用之间有很强的联系，并表明生物相互作用的影响对于具有相似性状的物种尤其重要。 （C）2015 Elsevier Ltd.保留所有权利。

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