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首页> 外文期刊>Estuarine Coastal and Shelf Science >Introduction of a functionally novel consumer to a low diversity system: Effects of the mud crab Rhithropanopeus harrisii on meiobenthos
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Introduction of a functionally novel consumer to a low diversity system: Effects of the mud crab Rhithropanopeus harrisii on meiobenthos

机译：向低多样性系统引入功能新颖的消费者：泥蟹Rhithropanopeus harrisii对鱼尾贝的影响

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摘要

The Harris mud crab Rhithropanopeus harrisii recently expanded into much of the Baltic Sea. This invasion is expected to have significant effects on the structure and functioning of benthic ecosystems due to the lack of native crabs. Habitat type potentially modulates the effects as crabs are expected to behave differently in different habitats. In this study we experimentally evaluated the effect of R. harrisii on the species composition and dominance structure of shallow water meiobenthos within common habitat types of the north-eastern Baltic Sea. Among the studied environmental variables R. harrisii had by far the strongest effects on meiobenthos. The effects of R. harrisii varied among different habitats with the crab mostly modifying taxonomic composition and species abundances of meiobenthic communities on unvegetated soft bottom sediments. Our experiment also showed that boulders provided shelter for R. harrisii and thereby reduced their burrowing activity and effects on the adjacent soft bottom meiobenthos. (C) 2015 Elsevier Ltd. All rights reserved.
机译：哈里斯泥蟹Rhithropanopeus harrisii最近扩展到波罗的海大部分地区。由于缺乏天然蟹，这种入侵预计将对底栖生态系统的结构和功能产生重大影响。由于预计螃蟹在不同生境中的行为会有所不同，因此栖息地类型可能会影响这种作用。在这项研究中，我们通过实验评估了哈里斯氏菌对东北波罗的海常见生境类型内浅水鱼贝类的种类组成和优势结构的影响。在所研究的环境变量中，哈里斯氏菌对鱼腥藻的影响最强。哈里斯氏菌对不同生境的影响各不相同，螃蟹主要改变了无底栖软底沉积物的中底栖动物群落的分类学组成和物种丰度。我们的实验还表明，巨石为哈里斯氏菌提供了庇护所，从而降低了它们的穴居活动和对邻近软底海底鱼类的影响。 （C）2015 Elsevier Ltd.保留所有权利。

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