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Spatial changes in the vertical distribution of calanoid copepods down to great depths in the North Pacific


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タイトル: Spatial changes in the vertical distribution of calanoid copepods down to great depths in the North Pacific
著者: Yamaguchi, Atsushi 著作を一覧する
Matsuno, Kohei 著作を一覧する
Homma, Tomoe 著作を一覧する
キーワード: Zooplankton
Calanoid copepods
Community structure
North Pacific
発行日: 2015年 1月14日
出版者: Springer
誌名: Zoological Studies
巻: 54
号: 1
出版社 DOI: 10.1186/s40555-014-0091-6
抄録: Background Despite its ecological importance, little information is available regarding the spatial and vertical changes in the calanoid copepod community over large geographical regions. This study investigated the spatial and vertical patterns in calanoid copepod abundance and community structure using zooplankton samples collected between depths of 0 and 2,615 m across the North Pacific from 0° to 56°N. Results A total of 211 calanoid copepod species belonging to 66 genera and 24 families were identified. Calanoid copepod abundance decreased with increasing depth, and few latitudinal differences were detected. Across the entire region, species diversity peaked near 500 to 2,000 m in depth. The calanoid copepod community was separated into seven groups with distinct spatial and vertical distributions. For all groups, the number of species was low (28 to 37 species) in the subarctic region (north of 40°N) and high (116 to 121 species) in the subtropical-tropical region. The deepest group in the subtropical-tropical region was composed of cosmopolitan species, and this group was also observed in deep water in the subarctic region. Conclusions In deep water, most of the calanoid copepod community consisted of cosmopolitan species, while an endemic community was observed in the subarctic region. Because the food of deep-sea calanoid copepods originates from the surface layer, sufficient and excess flux in the eutrophic subarctic region may be responsible for maintaining the endemic species in the region.
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 山口 篤


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