| 摘要: |
| 于2009 年4 月15～23 日在长江口及其邻近海域进行了32 个站位的浮游动物生态调查, 分析了浮游动物的种类组成、优势种、丰度和生物量的空间分布, 并利用PRIMER 生物统计学软件中的PCA、BIOENV 和RELATE 程序分析了浮游动物与环境因子的关系。共发现浮游动物成体72 种, 浮游幼虫9种, 合计种类数为81。中华哲水蚤(Calanus sinicus)、五角水母(Muggiaea atlantica)和拿卡箭虫(Sagittanagae)为主要优势种。调查海域的浮游动物可分为河口半咸水类群、近岸低盐类群、广盐类群和外海高温高盐类群4 大类。浮游动物平均丰度为100.1 个/m3, 平均生物量为154.1 mg/m3。丰度和生物量都是长江口外过渡区最高, 杭州湾最低, 经统计分析, 影响浮游动物分布的主要的环境因子是盐度、温度和chla。 |
| 关键词: 浮游动物 丰度 生物量 空间分布 长江口 |
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| 基金项目:环保部环保公益性行业科研专项(2008467041); 科技部科技重大专项课题(2008ZX07209-008) |
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| Relationship between spatial distribution of zooplankton and environmental factors in the Changjiang Estuary and its adjacent waters in spring |
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| Abstract: |
| This study was carried out in the Changjiang Estuary and its adjacent waters from 15th to 23rd, April, 2009. The aim was to examine the species composition, abundance and biomass, and the spatial distribution of the zooplankton community. The correlation between zooplankton and some influential factors were studied with multivariate analysis based on the sample data and environmental parameters. A total of 81 taxa of the zooplankton including 9 pelagic larvae were identified. Calanus sinicus, Muggiaea atlantica and Sagitta nagae were the dominant species in the cruise. The zooplankton of the Changjiang Estuary and its adjacent waters could be divided into four groups: estuary brackish water species, neritic oligohaline species, euryhaline species and high-temperaturehyperhaline species. The average abundance of zooplankton was 100.1 ind /m3, and average biomass 154.1mg /m3. Compared with different subareas, both abundance and biomass were the highest in the Outside Estuary Subarea and the lowest in the Hangzhou Bay Subarea. The main factors that influenced the distribution of zooplankton in the survey area were salinity, temperature, and chla. |
| Key words: zooplankton abundance biomass spatial distribution Changjiang Estuary |
