摘要
本文通过对浙江沿岸潮间带和水深小于20m浅海区的102个表层沉积样品的有孔虫分析,发现研究区内有孔虫的数量和组合存在明显差异。潮间带底栖和浮游有孔虫的数量明显低于浅水区,底栖有孔虫数量分布趋势是由北向南逐渐增加,而浮游有孔虫恰好与底栖有孔虫相反。除杭州湾外,潮间带的浮游有孔虫相当稀少。根据有孔虫动物群的数量及分布特点,研究区的底栖有孔虫可分为3个组合和5个亚组合。文中还叙述了玻璃状壳,似瓷状壳和胶结壳等各类壳的分布特点。最后讨论了有孔虫分布与水深、温度、盐度、搬运作用和“稀释”作用等的相互关系。
In this paper, 102 surface sediment samples on foraminifera are analysed along the coast of Zhejiang in ranging from intertidal flats to 20m isobath.The results show that the distributions of individuals and assemblages of foraminifera are very different in the study area.The individuals of benthic and planktic foraminifera are lower in the tidal zones than in shallow water regions.The distribution trends of benthic foraminifera increase gradually from north to south , but planktic foraminifera is in reverse to benthic foraminifera. Planktic foraminifera in the tidal zones is very rare with the exception of Hangzhou Bay. 3 assemblages and 5 subassemblages of benthic foraminifera are divided on the basis of the characters of abundance and distribution of benthic foraminiferal fauna in the area of study.The characters of the distributions of haline, porcelaneous, agglutinated tests and etc have been discussed, and finally the relationships of foraminiferal distribution and water depth, temperature, salinity, transportation, dilutiong and etc have also been discussed in this paper.
出处
《东海海洋》
1990年第3期35-48,共14页
Donghai Marine Science
