Relationship between Phytoplankton Distribution and Environmental Factors in the Chukchi Sea  

楚科奇海浮游植物的分布与环境因子的关系(英文)

作　　者：林更铭[1] 杨清良[1] 唐森铭[1] 

机构地区：[1]国家海洋局第三海洋研究所,福建厦门361005

出　　处：《Marine Science Bulletin》2009年第2期55-64,共10页海洋通报（英文版）

基　　金：supported by the Ministy of Science and Technology survey project under contract No.2006FY220700

摘　　要：Based on the samples collected from the Chukchi Sea during the FCNARE cruise from July to August in 1999 with the ＂Xuelong＂, the research vessel of SOA, China, the relationship between the distribution characterization of phytoplankton and environmental factors was analyzed with Primer 5.2 software. The result showed that the assemblages of phytoplankton in Chukchi Sea can be divided into three ecological groups： Arctic-boreal group, distributed mostly in northeastern ice-edge where the depth is more than 2 000 m and affected directly by Arctic Ocean; Boreal group, distributed in shelf-break ice in the center water where the depth is less 100 m; Eurythermal group, mainly distributed in the south which exchanged with North Pacific water through Bering Strait. The species diversity, cell density and distribution variability of phytoplankton among stations were great different. The range of phytoplankton density among stations was 1.6 × 10^3- 90 680.2 × 10^4 cells/m^3, and the ranges of diversity index and evenness index among stations were 0.07 - 0.87 and 0.33 - 3.82, respectively. Principal components analysis （PCA） showed that temperature and salinity had made important roles in the distribution of phytoplankton in the Chukchi Sea. Furthermore, the different influences of the variant water regimes, and the extremely dynamic physical nature of the drifting pack ice （e.g. packing, breaking up and melting ） introduce short-term variability into the water conditions that no doubt affect the phytoplankton distrubition.根据1999年7—8月"雪龙"号考察船在楚科奇海采集的样品,运用PRIMER软件分析该区网采浮游植物的分布特征及其与环境因子的关系。结果表明:楚科奇海浮游植物群聚可分为三个生态类群:北极—亚北极类群,主要分布于水深大于2000米且受北冰洋影响较直接的东北部浅水浮冰外缘;北方温带类群,主要分布于水深小于100米的中部浅水浮冰区;广温性类群,主要分布于通过白令海峡与北太平洋进行水交换的南部水域。该区浮游植物平面分布差异大,细胞密度站间变化范围为1.6×103～90680.2×104,物种多样性指数和均匀度站间变化范围分别为0.07～0.87和0.33～3.82。主成分(PCA)分析表明,对楚科奇海浮游植物分布起支配作用为水温和盐度。此外,由于该海区所处的特殊地理环境,浮冰的位置及其物理状态(聚集、开裂和消融等)均会增加浮游植物分布的变异。

关 键 词：Chukchi Sea Phytoplankton  Distribution Environmental factors Multivariate analysis 

分 类 号：Q948.8[生物学—植物学]