1991／1992年夏季南极普里兹湾邻近海域网采浮游植物的聚类分析

本文报道了１９９１／１９９２年南极夏季在普里兹湾邻近海域浮游植物调查的研究结果。经鉴定共有浮游植物３门２６属７８种；其平均细胞丰度为１２０±１７４×１０５个／ｍ３，密集区分布在６２°Ｓ、７８°～１０３°Ｅ，这一海域其细胞丰度在１１０×１０５～８６４×１０５个／ｍ３之间。根据浮游植物种类组成和细胞丰度百分比的聚类分析，测区浮游植物群落中可划分为四个聚合类群：菱形藻（Ｎｉｔｚｓｃｈｉａ）与赖氏针杆藻（Ｓｙｎｅｄｒａｒｅｉｎｂｏｌｄｉ）、长环毛藻（Ｃｏｒｅｔｈｒｏｎｃｒｉｏｐｈｉｌｕｍ）与翼根管藻（Ｒｈｉｚｏｓｏｌｅｎｉａａｌａ－ｔａ）和翼根管藻与赖氏针杆藻占优势的聚合类群及由海冰习性的菱形藻与近岸性角刺藻（Ｃｈａｅｔｏｃｅｒｏｓ）占优势组成的中山站近岸单一生态类群。文中还讨论了浮游植物丰度与环境因子的关系并对过去数年南极浮游植物的调查结果进行了比较

CLUSTERING ANALYSIS OF NET PHYTOPLANKTON IN PRYDZ BAY AND ITS ADJACENT WATERS,ANTARCTICA DURING THE AUSTRAL SUMMER 1991/1992

During the austral summer 1991/1992,studies on species composition,abundance distribution and ecological group of net phytoplankton in Prydz Bay and its adjacent waters were carried out .78 taxa belonging to 26 genera and 3 phyla were identified,of which,percentage of diatoms was 87.2%,the other species 13.8%.The average cell abundance of phytoplankton was 120±173.8×10 5 cells/m 3.The area with high abundance of phytoplankton occurred in 62°S,78°～103°E,where cell abundance were 110×10 5 ～864×10 5 cells/m 3. According to clustering analysis of species composition and percent similarity of station clusters,phytoplankton community were divided into four cluster ecological groups: Corethron criophilum and Rhizosolenia alata group, Nitzschia and Synedra reinboldii group, Rhizosolenia alata and Synedra reinboldii group and Nitzschia and Chaetoceros group.Discussion on the relationship between phytoplankton and the environmental parameters and the comparisons between the results of present study and those of previous investigations were also made.