摘要
根据2004年11月在长江口及其邻近水域37个测站采集的浮游植物水样Utermohl方法分析结果，研究了该水域浮游植物群集特征，包括浮游植物优势种，细胞丰度和多样性指数，并进行了其与环境因子的典范对应分析（CCA）。调查区浮游植物组成以硅藻和甲藻为主，其丰度所占比例分别为67，97％和28．94％。浮游植物优势种为中肋骨条藻、具槽帕拉藻和菱形海线藻等温带近岸种。浮游植物细胞丰度为0．27×10^3～133．38×10^3个／L，平均为4，97×10^3个／L，高值出现在调查区的南部和东南部。Margalef物种丰富度指数和Shannon-Wieher多样性指数在各测站变化较大。分析表明，优势种中肋骨条藻的分布与硝酸盐和硅酸盐呈正相关，具槽帕拉藻和菱形海线藻与温度呈正相关。
37 water samples for phytoplankton analysis were collected in the Changjiang River Estuary and its adjacent waters in November 2004. Based on the analysis results by means of Utermohl method, the features of the phytoplankton assemblage in the water area are studied including phytoplankton dominant species, cell abundance, and diversity index. The canonical correspondence analysis （CCA） are conducted between the features and the environmental factors. Major phytoplankton components are diatoms and dinoflagellates with their cell abundance proportions of 67. 97% and 28. 94% respectively. The dominant species are the temperate-coastal such as Skeletonema costatum, Paralia sulcata, and Thalassionema nitzschioides. The total ceil abundance varies from 0.27 × 10^3 to 133.38 × 10^3 cells/L with an average about 4.97 × 10^8 cells/L, and its peak values appear in the south and the southeast of the studied area. Both the Margalef species richness index and the Shannon-Wiener diversity index become of great variability among the stations. It is shown by the analysis that the distribution of Skeletonerna coastatum among the dominant species is positively related to nitrate and silicate while either paralia sulcata or Thalassionema nitzschioides is positively related to water temperature.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2008年第3期364-371,共8页
Advances in Marine Science
基金
中国科学院知识创新工程重点方向项目--长江口水域富营养化关键过程与机制研究(KZCX3-SW-232)
国家自然科学基金重点项目--长江口水域富营养化特性及对策研究(50339040)
国家自然科学基金项目--东海和黑潮区的固氮蓝藻分布
固氮速率及其对海区新生氮贡献研究(40676089)
关键词
浮游植物
群落结构
中肋骨条藻
长江口
phytoplankton
community structure
Skeletonema coastatum
Changjiang Estuary
