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首页> 外文期刊>Polar biology >A biodiversity survey of scavenging amphipods in a proposed marine protected area: the Filchner area in the Weddell Sea, Antarctica
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A biodiversity survey of scavenging amphipods in a proposed marine protected area: the Filchner area in the Weddell Sea, Antarctica

机译：在拟议的海洋保护区（南极韦德海的Filchner区）进行捕食性两栖动物生物多样性调查

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An integrative inventory of the amphipod scavenging fauna (Lysianassoidea), combining morphological identifications with DNA barcoding, is provided here for the Filchner area situated in the south-eastern Weddell Sea. Over 4400 lysianassoids were investigated for species richness and relative abundances, covering 20 different stations and using different sampling devices, including the southernmost baited traps deployed so far (76A degrees S). High species richness was observed: 29 morphospecies of which 5 were new to science. Molecular species delimitation methods were carried out with 109 cytochrome c oxidase I gene (COI) sequences obtained during this study as well as sequences from specimens sampled in other Antarctic regions. These distance-based analyses (trees and the Automatic Barcode Gap Discovery method) indicated the presence of 42 lineages; for 4 species, several (cryptic) lineages were found. More than 96% of the lysianassoids collected with baited traps belonged to the species Orchomenella pinguides s. l. The diversity of the amphipod scavenger guild in this ice-bound ecosystem of the Weddell Sea is discussed in the light of bottom-up selective forces. In this southernmost part of the Weddell Sea, harbouring spawning and nursery grounds for silverfish and icefishes, abundant fish and mammalian food falls are likely to represent the major food for scavengers. Finally, the importance of biodiversity surveys in the context of the establishment of a marine protected area in this region (Weddell Sea MPA) is highlighted and how future studies can contribute to a better understanding the ecological role of scavengers in this system is discussed.
机译：这里为东南韦德海的Filchner地区提供了一个两栖动物清除动物（Lysianassoidea）的综合清单，将形态学识别与DNA条形码相结合。调查了超过4400个lysianassoids的物种丰富度和相对丰度，涵盖了20个不同的站点并使用了不同的采样设备，包括迄今为止部署的最南端诱饵陷阱（76A度）。观察到物种丰富度高：29个形态种，其中5个是科学新物种。分子物种定界方法使用了在这项研究中获得的109种细胞色素c氧化酶I基因（COI）序列以及在其他南极地区采样的样本中的序列。这些基于距离的分析（树和自动条形码间隔发现方法）表明存在42个谱系。对于4种，发现了几个（隐性）谱系。用诱饵诱捕器收集的lysianassoids超过96％属于Orchomenella pinguides物种。 l。结合自下而上的选择性力量，讨论了韦德尔海冰封生态系统中的两栖动物清道夫协会的多样性。在韦德尔海的最南端，栖息着产银鱼和冰鱼的产卵场和育苗场，丰富的鱼类和哺乳动物的食用瀑布可能是清道夫的主要食物。最后，强调了在该区域建立海洋保护区（Weddell Sea MPA）的背景下进行生物多样性调查的重要性，并讨论了未来的研究如何有助于更好地理解清除剂在该系统中的生态作用。

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