| 摘要: |
| 作者于2016年9月27日～10月25日对热带西太平洋(0°～20°N, 120°～130°E)10个站位的网采浮游植物群落结构进行了采样调查。应用Uterm?hl方法对调查海域浮游植物的物种组成、细胞丰度、优势物种以及群落多样性等相关生态特征进行了分析。希望为热带西太平洋提供一些基础的背景资料,为以后的研究奠定基础。结果表明, 鉴定出浮游植物共计4门、66属、243种(包括变种、变型), 含硅藻门(Bacillariophyta)34属、103种, 甲藻门(Pyrrophyta)28属、133种, 金藻门(Chrysophyta)2属、4种,蓝藻门(Cyanophyta)2属、3种。浮游植物细胞丰度1 965.573×103 细胞/m3 , 其中蓝藻的细胞丰度为1 945.169×103 细胞/m3 , 决定了浮游植物的分布格局, 占总细胞丰度的98.96%, 高值区分布在0°N130°E-10°N130°E的4个站位(E130-13、E130-15、E130-17、E130-19); 硅藻丰度在20°N断面N20-4站位存在高值区; 甲藻丰度在130°E断面的3个站位(E130-10、E130-13、E130-15)存在高值区。本次调查的优势种依次为铁氏束毛藻(Trichodesmium thiebaultii)、扁形原甲藻(Prorocentrum compressum)、扁豆原甲藻(Prorocentrum leniculatum)、胞内植生藻(Richelia intracellularis)、菱形海线藻(Thalassionema nitzschioides)、细弱海链藻(Thalassiosira subtilis)、具边线形圆筛藻(Coscinodiscus marginato-lineatus)、科氏角藻(Ceratium kofoidii)、鲁比膝沟藻(Gonyaulax lurbynaii)、中华半管藻(Hemiaulus sinensis)、霍氏半管藻(Hemiaulus hauckii)、小等刺硅鞭藻(Dictyocha fibula)。Shannon-Weiner多样性指数的均值为2.440,Pielou 均匀度指数的均值为0.163。相关分析结果显示浮游植物空间分布主要受PO4-P、NH4-N的影响,且由蓝藻的相关性决定的。聚类分析得出群落结构分为大洋群聚和近岸群聚两种类型(其中大洋群聚的站位又划分为0°～10°N纬度范围聚集和10°～20°N纬度范围聚集)。 |
| 关键词: 浮游植物 群落结构 相关分析 聚类分析 热带西太平洋 |
| DOI：10.11759/hykx20180331002 |
| 分类号: |
| 基金项目:国家重点基础研究发展规划项目(2015CB954002); 国家自然科学基金(41676112, 41276124, 41876134); 天津市高等学校创新团队培养计划(TD12-5003); 孙军的长江学者奖励计划 |
|
| Netz-phytoplankton community structure of the tropical Western Pacific Ocean in summer 2016 |
|
CHEN Zhuo,SUN Jun,ZHANG Gui-cheng
|
| Abstract: |
| Netz-phytoplankton community structure was investigated in 10 stations in the tropical Western Pacific Ocean (0°-20°N, 120°-130°E) during September 27 to October 25 in 2016 by authors. 2015. The Uterm?hl method was used to analyze the species composition, cell abundance, dominant species and community diversity of phytoplankton in the survey area. We hope to provide some basic background information for the tropical Western Pacific and lay the foundation for future research. The results showed that there are 66 genera and 243 species (including variety, forma) belonging to 4 phyla were identified, in which 34 genera and 103 species belonged to Bacillariophyta, 28 genera and 133 species were Pyrrophyta, 2 genera and 4 species were Chrysophyta and 2 genera and 3 species were Cyanophyta. The cell abundance of phytoplankton was 1965.573×103 cells/m3, and cyanobacterium accounted for 98.96% with 1945.169×103 cells/m3. The distribution of cyanobacterium governed the distribution of phytoplankton. The high value areas of cyanobacteria were distributed at 4 stations (E130-13, E130-15, E130-17, E130-19) at 0°N130°E -10°N130°E. Diatom has high value area at 20°N (N20-4) position. There were high values of dinoflagellate in 3 stations (E130-10, E130-13, E130-15) at 5°-10°N. The dominant species were Trichodesmium thiebaultii, Prorocentrum compressum, Prorocentrum leniculatum, Richelia intracellularis, Thalassionema nitzschioides, Thalassiosira subtilis, Coscinodiscus marginato-lineatus, Ceratium kofoidii, Gonyaulax lurbynaii, Hemiaulus sinensis, Hemiaulus hauckii and Dictyocha fibula. The average Shannon-Weiner diversity index and Pielou evenness values were 2.440 and 0.163 respectively. The results of statistical correlation analysis showed that the spatial distribution of phytoplankton was mainly influenced by PO4-P and NH4-N, and the correlation of total phytoplankton is determined by the correlation of cyanobacteria. Cluster analysis that based on surface abundance aggregated station into coastal group and pelagic group obviously, in which the pelagic group stations are divided into 0°-10°N and 10°-20°N respectively. |
| Key words: phytoplankton community structure correlation analysis cluster analysis the tropical Western Pacific Ocean |
