摘要
根据2007年到2008年5月和8月长江口水域共4个航次的监测资料,对长江口水域浮游动物的生物量、优势种、种类数和多样性指数的平面分布及其与环境的关系进行了分析。结果表明,调查水域浮游动物生物量值8月份大于5月份生物量,分布格局呈近岸向外海递增趋势。5月出现的优势种虫肢歪水蚤(Tortanus vermiculus)和真刺唇角水蚤(Labidoceraeuchaeta)分布于河口水域以及咸淡交错水域。8月的背针胸刺水蚤(Centropages dorsispinatus)和太平洋纺锤水蚤(Acartiapacifica)分布于河口水域和咸淡交错水域,肥胖箭虫多分布于口外近海水域。中华哲水蚤(Calanus sinicus)在4次采样均出现,是口外近海水域的主要优势种。调查水域浮游动物种类数和多样性指数分布格局呈近岸向外海递增趋势。盐度、温度及主要优势种中华哲水蚤是影响长江口浮游动物分布的重要因子。
In this study, the ecological characteristics of zooplankton in Yangtze River estuary were described and its relationship to the environmental factors was analyzed. Sampling was carried out in May and August between 2007 and 2008. Results showed that the biomass of zooplankton in August was higher than that in May, increasing gradually from coastal region towards offshore. In May, Tortanus vermieulus and Labidocera euchaeta were both the dominant species, which spread in estuarine waters and littoral waters. In August, the dominant species in estuarine waters and littoral waters were changed to Centropages dorsispinatus and Acartia pacifica. In offshore waters, Sagitta enflata was also one of the dominant species in August. Calanus sinicus, the only species occurred in all 4 oceanographic censuses was the most important dominant species in nearshore waters out of the Yangtze River estuary. The distribution pattern of the species number and diversity index showed a tendency of increasing gradually from coastal region to offshore waters. Salinity, temperature and Calanus sinicus were the important factors affecting the distribution of zooplankton in the waters near the Yangtze River estuary.
出处
《海洋通报》
CAS
CSCD
北大核心
2013年第2期184-190,共7页
Marine Science Bulletin
基金
海洋公益性行业科研专项(20120515)
关键词
长江口
浮游动物
生态分布特征
春夏季
优势种
Yangtze River estuary
zooplankton
ecological distribution characteristics
spring and summer
dominantspecies
