摘要
本文通过对苏北海岸从北到南采样 ,统计有孔虫的个数 ,着重分析 Ammonia beccarii(毕克卷转虫 ) ,并结合样品粒度分析、化学分析 ,试图寻找这单一属种的分布规律 ,发现 Ammonia beccarii的丰度、活体百分含量、优势度沿海岸线变化与有孔虫群的变化有较好的对应关系 ,但优势度在有孔虫群落中并不明显 ,基本在 2 0 %以下 ;Ammo-nia beccarii在分布上有如下特征 :滩面上丰度与活体百分含量较大 ,在海滩、河口环境较小 ,在人工泻湖中极大 ;在南北方向上的分布变化没有显著规律 ;在沉积物中 ,一般在中值粒径较小 (MdΦ≤ 0 .8)或较大 (MdΦ≥ 5 .4 4 )的沉积物中 ,Ammonia beccarii是不适宜生长的 ;另外 ,有机质含量可能是限制 Ammonia beccarii生长的一个条件。
Thirty two samples were collected along the coastal zone of Jiangsu province from north to south, focusing on Ammonia beccarii analysis. Foraminifera are picked up and identified with optical microscope. The results suggest that there is a corresponding relationship between the abundance of total foraminifera and Ammonia beccarii. The percentages of living individuals of total foraminifera and Ammonia beccarii are also corresponding, but the average percentages of living individuals of Ammonia beccarii are below 20%. The spatial distribution patterns of Ammonia beccarii in the micro-environment of Jiangsu coastal zone are 1) the percentages of living individuals and the abundance are high on the flats and lagoon but low in the beach and estuaries 2) sediment grain sizes as well as chemistry show that the sediments of MdΦ≤0.8 and MdΦ≥5.4 are not suitable for Ammonia beccarii and the content of organic matter may be another limiting factor. The present study indicates that the spatial distribution patterns of Ammonia beccarii in the micro-environment of Jiangsu coastal zone reflect the coastal ecological condition and the hydrodynamic condition.
出处
《微体古生物学报》
CSCD
北大核心
2004年第1期58-63,共6页
Acta Micropalaeontologica Sinica
基金
国家自然科学基金 (项目号 40 0 760 17)
江苏省环境保护厅"碧海计划"资助项目
