Vertical changes in abundance, biomass and community structure of copepods down to 3000 m in the southern Bering Sea
スポンサーリンク
概要
- 論文の詳細を見る
Vertical changes in abundance, biomass and community structure of copepods down to 3000 m depth were studied at a single station of the Aleutian Basin of the Bering Sea (53°28'N, 177°00'W, depth 3779 m) on the 14th June 2006. Both abundance and biomass of copepods were greatest near the surface layer and decreased with increasing depth. Abundance and biomass of copepods integrated over 0-3000 m were 1,390,000 inds. m^[-2] and 5,056 mg C m^[-2], respectively. Copepod carcasses occurred throughout the layer, and the carcass:living specimen ratio was the greatest in the oxygen minimum layer (750-100 m, the ratio was 2.3). A total of 72 calanoid copepod species belonging to 34 genera and 15 families occurred in the 0-3000 m water column (Cyclopoida. Harpacticoida and Poecilostomatoida were not identified to species level). Cluster analysis separated calanoid copepod communities into 5 groups (A-E). Each group was separated by depth and the depth range of each group was at 0-75 m (A), 75-500 m (B), 500-750 m (C), 750-1500 m (D), and 1500-3000 m (E), respectively. Copepods were divided into four types based on the feeding pattern: suspension feeders, suspension feeders in diapause, detritivores and carnivores. In terms of abundance the most dominant group was suspension feeders (mainly Cyclopoida) in the epipelagic zone, and detritivores (mainly Poecilostomatoida) were dominant in the meso- and bathypelagic zones. In terms of biomass, suspension feeders in diapause (calanoid copepods Neocalanus spp. and Eucalanus bungii) were the major component (ca. 10-45%), especially in the 250-3000 m depth. These results are compared with the previous studies in the same region and that down to greater depths in the worldwide oceans.
論文 | ランダム
- 287 過去の仕事内容が片麻痺患者の姿勢変化に及ぼす影響についての一考察(測定・評価)
- 最近における石油製品の性能評価方法について
- 感染症(救急疾患の診療の実際)
- 学会抄録 第209回日本泌尿器科学会関西地方会(2009年12月5日(土), 於京都府立医科大学)
- 補償事例 生コンクリート工場の一部が支障となり、構外を移転先とした移転補償について