渤海湾中北部表层沉积硅藻分布及环境指示意义  

Diatom assemblages from surficial sediments in north-central Bohai Bay and their implications for environments

作　　者：商志文[1] 田立柱[1] 王宏[1] 李建芬[1] 

机构地区：[1]中国地质调查局天津地质调查中心,天津300170

出　　处：《中国地质》2012年第4期1099-1107,共9页Geology in China

基　　金：国家海洋局"908"专项"天津市海岸带调查"(908-02);中国地质调查局项目"环渤海地区重点地段环境地质调查及脆弱性评价"(1212010540501)资助

摘　　要：发现渤海湾中北部表层沉积硅藻21属37种,确定了Cyclotella striata/stylorum,Paralia sulcata和Coscinodiscusperforatus等9个优势种的地理分布;进而根据聚类分析,将研究区表层沉积硅藻划分为6个组合区。讨论了控制它们分布的环境因素,发现盐度与深度是重要控制因素,沉积物底质类型亦对硅藻的分布有一定的影响。37 diatom species, belonging to 21 genera, have been found from the surficial sediments in the north- central Bohai Bay. The distribution of nine dominant species, such as Cydotella striata/stylorum, Paralia sulcata and Coscinodiscus petforatus, has been determined. Based on cluster analysis, the authors have divided the study area into six diatom assemblage-regions. Furthermore, environmental factors controlling the diatom distribution are discussed in this paper. It is revealed that salinity and water depth are two most important factors while the grain size of the sediments also has some influences on the distribution.

关 键 词：硅藻 表层沉积物 环境因素 渤海湾中北部 

分 类 号：X173[环境科学与工程—环境科学] X835