渤海、黄海近岸海域表层沉积硅藻分布特征

Diatom Assemblages and Distribution in Coastal Surface Sediments in the China Sea(Bohai Sea and Huanghai Sea)

本文对2011年内采自我国长江口以北渤海和黄海近岸海域11个站住67个表层沉积物样品进行硅藻鉴定分析,共鉴定出硅藻118个种和变种,隶属于30个属。主要以近岸广布种为主,海水种和半咸水种占绝大多数。硅藻平均丰度为7198粒/g,其中渤海为4674粒/g、黄海北部为22427粒/g、黄海西部为6342粒/g,总体明显低于长江口以南近岸海域。根据硅藻优势种和次优势种的分布特征,在长江口以北近岸海域共划分出6个硅藻组合和2个亚组合。

There are 118 species and varieties, belong to 30 diatom genera, were identified in 67 coastalsurface sediment samples from 11 stations in the north of China Seas （Bohai Sea and Huanghai Sea）.They were constituted mainly by coastal widespread species, sea water species and brackish water species. The average abundance of diatoms was 7198 particle/g （4674 particle/g in Bohai Sea, 22427 particle/gin the northern Yellow Sea, and 6342 particle/g in western Yellow Sea）, which were obviouslylower than the southeast of China coast. According to the distribution pattern of dominant and subdominant species, six assemblages and two subassemblages of diatoms were divided in the north ofChina.