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首页> 外文期刊>Marine ecology >Spatial distribution of crustaceans associated with shallow soft-bottom habitats in a coral reef lagoon
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Spatial distribution of crustaceans associated with shallow soft-bottom habitats in a coral reef lagoon

机译：与珊瑚礁泻湖中浅层软底生境相关的甲壳类动物的空间分布

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The ecology and diversity of the shallow soft-bottom areas adjacent to coral reefs are still poorly known. To date, the few studies conducted in these habitats dealing with macroinvertebrate fauna have focused on their abundance spatial patterns at high taxonomic levels. Thus, some aspects important to evaluate the importance and vulnerability of these habitats, such as species diversity or the degree of habitat specialization, have often been overlooked. In this study we compared the crustacean assemblages present in four different habitats at Magoodhoo Island coral reef lagoon (Maldives): coral rubble, sandy areas and two different seagrass species (Thalassia hemprichii and Cymodocea sp.). Forty-two different crustacean species belonging to 30 families and four orders were found. ‘Site’ was a significant factor in all of the statistical analyses, indicating that tropical soft-bottom habitats can be highly heterogeneous, even at a spatial scale between tens and hundreds of meters. Although traditionally it has been considered that seagrass beds host greater species diversity and abundance of organisms than adjacent unvegetated habitats, no differences in the univariate measures of fauna (abundance of organisms, number of species and Shannon diversity) were observed among habitats. However, sandy areas, coral rubble and seagrass beds exhibited different species composition of crustacean communities. The percentage of taxa considered as potential habitat specialists was 27% and the number of species exclusively occurring in one habitat was especially high in seagrass beds. Thus, degradation of this vegetated habitat would result in a great loss of biodiversity in tropical shallow soft-bottom habitats.
机译：与珊瑚礁相邻的浅层软底区域的生态学和多样性仍然知之甚少。迄今为止，在这些栖息地中处理无脊椎动物的动物的研究很少集中在高分类学水平上的丰富空间格局。因此，在评估这些生境的重要性和脆弱性方面很重要的某些方面，例如物种多样性或生境专业化程度，常常被忽略。在这项研究中，我们比较了马古德霍岛珊瑚礁泻湖（马尔代夫）的四个不同生境中的甲壳类动物组合：珊瑚瓦砾，沙质地区和两种不同的海草物种（Thalassia hemprichii和Cymodocea sp。）。发现了属于30个科系和4个科的42种不同的甲壳类。 “站点”是所有统计分析中的重要因素，表明即使在几十米至几百米的空间尺度上，热带软底生境也可能高度异质。尽管传统上认为海草床比相邻的无植被生境拥有更多的物种多样性和丰富的生物体，但是在生境之间没有观察到动物多样性的单变量测量值（生物体丰富度，物种数量和香农多样性）的差异。然而，沙质地区，珊瑚瓦砾和海草床表现出不同的甲壳动物群落组成。被认为是潜在栖息地专家的生物分类的百分比为27％，并且在一个草丛中唯一存在于一个栖息地的物种数量特别多。因此，这种植被生境的退化将导致热带浅层软底生境的生物多样性大大丧失。

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