Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas
Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas
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南大洋海洋生物多样性和深度分区的比较：来自斯科舍海和阿蒙森海的新大型多毛类数据集的证据
DOI：
10.1007/s12526-017-0735-y
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发表时间：
2018
影响因子：
1.6
通讯作者：
A. Glover
中科院分区：
文献类型：
--
作者：
L. Neal;K. Linse;M. Brasier;E. Sherlock;A. Glover
基于一个数据集的16,991和307形态种多毛类蠕虫收集从58 epibenthic雪橇部署在整个斯科舍和阿蒙森海，我们表明，他们的货架，深架和斜坡社区的结构是由不同的多毛类组合跨越地区的“高”，“中”，“低”的生物多样性。深度已被确定为构成两个海洋中多毛类群落的主要因素，这与南大洋底栖生物广布的流行概念相反。从进化的角度来看，大陆架和斜坡动物群之间的这种强烈的差异可以解释为在大陆架避难所生存的证据，而不是在冰川最大期迁移到更深的沃茨。以前未采样的阿蒙森海被证明是多样的，具有高水平的分类学新奇，许多物种是科学上的新物种。阿蒙森海（松岛湾）内大陆架的多毛类群落也被证明具有深海特征，这可能是由于环极深水侵入大陆架所致。在斯科舍海，我们的数据支持的概念，相对较高的生物多样性的沃茨周围的南奥克尼群岛，南格鲁吉亚，沙格岩（最近成立的海洋保护区）和抑郁的多样性在极端环境的南图勒。
Based on a dataset of 16,991 and 307 morphospecies of polychaete worms collected from 58 epibenthic sledge deployments across the Scotia and Amundsen Seas, we show that the structures of their shelf, deep-shelf and slope communities are composed of distinct polychaete assemblages spanning regions with “high”, “intermediate”, and “low” biodiversity. Depth has been identified as the main factor structuring the polychaete communities in both seas, countering the prevalent notion of extended eurybathy of the Southern Ocean benthos. From an evolutionary perspective, this strong dissimilarity between shelf and slope fauna could be interpreted as evidence for survival in shelf refugias, rather than migration into deeper waters during glacial maxima. The previously unsampled Amundsen Sea is shown to be diverse, harbouring a high level of taxonomic novelty, with many species new to science. The polychaete community of the inner shelf in the Amundsen Sea (Pine Island Bay) has also been shown to be of deep-sea character, likely due to intrusion of the Circumpolar Deep Water onto the shelf. In the Scotia Sea, our data support the notion of relatively high biodiversity of waters around the South Orkney Islands, South Georgia, and Shag Rocks (all recently established as Marine Protected Areas) and depressed diversity in the extreme environment of Southern Thule.
影响因子：
1.7
作者：
Schueller, Myriam
通讯作者：
Schueller, Myriam