| 摘要: |
| 于2014年12月至2015年1月, 在121°42′E～126°18′E, 28°43′N～30°02′N的浙江中部海域, 对97个站位采集的浮游植物的种类组成、群落结构、细胞丰度进行了研究。共鉴定浮游植物6门53属163种(含19未定种), 其中以硅藻为主, 甲藻其次; 浙江中部海域冬季浮游植物群落可分为4种生态类型: 半咸水类群、沿岸广温型、近海广温广盐型、外海高温高盐型, 其中最主要生态类型为近海广温型; 浮游植物优势种为中华齿状藻(Odentella sinensis)、琼氏圆筛藻(Coscinodiscus jonesianus) 、伏氏海线藻(Thalassionema frauenfeldii)、虹彩圆筛藻(Coscinodiscus oculus-iridis)、太阳双尾藻(Ditylum sol)、洛氏角毛藻(Chaetoceros lorenzianus)。浮游植物的细胞丰度范围为0.3×104个/m3～67.1×104个/m3, 平均值为8.8×104个/m3, 呈现近岸>近海>外海的分布特点, 高值区位于三门湾至渔山列岛之间的海域; 生物多样性指数平均值为3.36; Pearson 相关性分析得出: 调查海域浮游植物的细胞丰度与盐度呈负相关,与磷酸盐、硝酸盐成正相关。 |
| 关键词: 浙江中部海域 冬季 浮游植物 群集结构 |
| DOI：10.11759/hykx20150518003 |
| 分类号: |
| 基金项目:浙江省海洋环保与生态项目(浙海渔计[2012]100 号) |
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| Phytoplankton assemblages in offshore water in mid-Zhejiang province during the winter of 2014 |
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LIU Ya-lin,HUANG Xiu-qing,JIANG Xiao-shan,WANG Hang-jun,ZOU Qing,QI An-xiang
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| Abstract: |
| A total of 97 phytoplankton samples were collected in a multidisciplinary investigation from offshore waters in mid-Zhejiang province (28°43′–30°02′N, 121°42′–126°18′E) from December 2014 to January 2015. Moreover, the phytoplankton species composition, assemblage structure, and cell abundance of phytoplankton were studied. A total of 163 species belonging to 53 genera of 6 phyla were identified (including uncertain species). The phytoplankton community mainly comprised bacillariophyta and dinophyta. Moreover, in the study area, the phytoplankton community was divided into four ecological types: a true estuarine component, coastal component, eurythermal and euryhaline marine component, and a high salinity component. of these, the eurythermal and euryhaline marine component was the major ecotype. Dominant phytoplankton species were Odentella sinensis, Coscinodiscus jonesianus, Thalassiothrix frauenfeldii., Coscinodiscus oculus-iridis, Ditylum sol, and Chaetoceros lorenzianus. Cell abundance ranged from 0.3×104 cells/m3 to 61.7×104 cells/m3 with an average of 8.8×104 cells/m3. The higher values occurred in the area between Sanmen Bay and the Yushan Islands. The average Shannon-Wiener indices of phytoplankton assemblages was 3.36, and according to Pearson correlation analysis, the distribution of phytoplankton cell abundance was positively correlated with phosphate and nitrate but negatively correlated with salinity. |
| Key words: offshore water of mid-Zhejiang province winter phytoplankton assemblage structure |
