| 摘要: |
| 于2009 年3 月对鸭绿江河口进行了10 个站的浮游植物生态调查, 分析了该海域浮游植物的种类组成、优势种类、群落结构以及水平分布等特征参数。本次调查共鉴定浮游植物48 种, 其中硅藻种类最多, 达41 种, 甲藻其次, 为6 种, 金藻1 种。浮游植物可划分为广温类群、暖水类群和暖温类群 3个生态类群, 以广温类群为主。浮游植物细胞数量平均4.67×108个/m3, 细胞数量自河口向外海逐渐降低。其中, 中肋骨条藻(Skeletonema costatum)占据绝对优势。浮游植物群落优势种单一且优势度较大,群落结构相对简单。相关性分析表明温度和盐度是浮游植物细胞数量的主要限制性因子。浮游植物数量受鸭绿江径流的影响较大。 |
| 关键词: 鸭绿江口 浮游植物 种类多样性 温度 盐度 |
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| 基金项目:国家863 计划船载海洋生态环境监测技术系统(2007AA092101) |
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| Phytoplankton community and its relationship with environment factors in the Yalujiang River Estuary |
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| Abstract: |
| In order to study the structure of the phytoplankton community of the Yalujiang River and its influencing factors, phytoplankton samples were collected from the Yalujiang River Estuary and its adjacent waters in March, 2009. A total of 48 phytoplankton species were identified, including forty-one diatoms, six dinoflagellates and one golden-brown alga. Phytoplankton species can be divided into three ecological groups: eurythermal taxa, warm water taxa and warm temperature taxa, and the eurythermal taxa was the dominant group. The average number of phytoplankton cell was 4.67 × 108/ m3, and the cell number decreased from the inner section of the Yalujiang River estuary to open sea. The survey results showed that the structure of phytoplankton community was simple with Skeletonema costatum as the main dominant species. From the correlation analysis, it is concluded that temperature and salinity were the major limit factors for the number of phytoplankton cells, and the Yalujiang River runoff had made a great impact on the number of phytoplankton cells. |
| Key words: Yalujiang River estuary phytoplankton diversity temperature salinity |
