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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >The effect of an invasive foundation species on diversity is due to increased habitat availability
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The effect of an invasive foundation species on diversity is due to increased habitat availability

机译：侵入性基础物种对多样性的影响是由于栖息地可用性增加

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Both foundation species and introduced species have exceptional influence on community diversity and structure, though they have historically been thought to have opposite effects. However, when introduced species can provide novel habitat within a community, their benefit to the community as a foundation species may outweigh their cost as an invader. The magnitude or direction of species interactions can depend on the environment, thus the net effect of introduced foundation species can vary across different environmental factors. A settlement tile experiment was conducted on the fouling communities of California harbors to determine whether the effects of a widespread invasive bryozoan, Watersipora subtorquata, vary between two locations in its California range, Alamitos Bay and Bodega Harbor. Treatments with live and dead colonies and two sizes of blank tiles were used to evaluate the effects of colony structure and available bare substrate on both mobile and sessile species in the community. Though mobile invertebrate communities in each location across treatments were not significantly dissimilar to each other, communities on large tiles were significantly dissimilar to other communities in each location. Mobile species richness was greatest on live colony and small tiles in Bodega, but greatest on dead colony and large tiles in Alamitos. Both the diversity and community structure of sessile invertebrates across treatments differed significantly between regions. Diversity was greatest on dead colony tiles in Alamitos, where communities were more dissimilar across treatments, but was greatest on live W. subtorquata tiles in Bodega where communities were less dissimilar across treatments. These results highlight the potential for W. subtorquata to have location-dependent net effects on the community throughout its invasive range as a foundation species.
机译：基础物种和引入的物种都对社区多样性和结构具有卓越的影响，尽管他们历来被认为具有相反的影响。然而，当介绍的物种可以在社区内提供新的栖息地时，他们对社区的利益作为基础物种可能会将其成本超过其作为侵略者。物种相互作用的幅度或方向可以取决于环境，因此引入的基础物种的净效应可能因不同的环境因素而异。在加利福尼亚州的污垢社区进行了一个结算瓷砖实验，以确定广泛侵入性胸膜，沃特斯普拉副数据的影响，在加州范围内的两个地点，Alamitos Bay和Bodega港口之间发生不同。使用现场和死殖民地和两种尺寸的空白瓷砖的治疗方法用于评估群体结构和可用的裸衬底在社区中的移动和牙龈种类上的影响。虽然在治疗中的每个地点的移动无脊椎动物社区彼此没有显着差异，但大型瓷砖的社区与每个地点的其他社区具有显着差异。移动物种丰富度最大，在博德加的活殖民地和小瓷砖上最大，但在alamitos的死殖民地和大型瓷砖上最大。各种各样的治疗中的各种各样和社区结构都有显着不同的分歧。多样性在alamitos的死殖民地瓦片上最伟大，社区在治疗中更有不同，但在博德加的生活W. Subtorquata瓦片上最大。社区跨治疗的不相似。这些结果突出了W. SubtOrquata在整个侵入范围内对社区的位置依赖净效应的潜力。

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