收稿日期: 2010-01-20
修回日期: 2010-07-06
网络出版日期: 2011-09-08
基金资助
我国近海海洋综合调查与评价专项(908-01-CJ14)
Benthic foraminiferal assemblages in surface sediments off the Pearl River Estuary and their environmental implications
Received date: 2010-01-20
Revised date: 2010-07-06
Online published: 2011-09-08
对珠江口外CJ14区块250个站位的表层沉积物进行底栖有孔虫分析, 共发现底栖有孔虫118种, 其中玻璃壳质80种, 瓷质壳质21种, 胶结壳质17种。有孔虫丰度基本随水深变深而增大。为研究底栖有孔虫分布与沉积环境之间的关系, 对底栖有孔虫含量进行Q型因子分析, 并选取前4个主因子, 分别对应4个有孔虫组合。它们总共解释了总方差的86.2％, 基本上反映了沉积物中有孔虫的群落结构。研究表明, 水深和盐度是影响珠江口表层沉积物中有孔虫组合分布的控制因素, 其他影响因素主要包括沉积物类型、水动力条件和沉积速率。水动力条件主要影响有孔虫的含量; 沉积速率主要影响有孔虫的丰度。
李涛,向荣,李团结 . 珠江口外表层沉积物底栖有孔虫组合及其与环境的关系[J]. 热带海洋学报, 2011 , 30(4) : 51 -57 . DOI: 10.11978/j.issn.1009-5470.2011.04.051
The authors selected 250 surface sediments from the sample stations at the CJ14 Block off the Pearl River Estuary to study benthic foraminifer. A total of 118 species were identified, including 80 species of hyaline shell, 21 species of porcelaneous shell, and 17 species of agglutinated shell. The abundance of foraminifer groups increased with water depth. In order to reveal the relationship between foraminifer distribution and marine environment, Q-mode factor analysis was carried out. The results showed that four varimax factors explained 86.2% of the total variance. Consequently, the varimax factors represented foraminifer community structure in the sediments. Our results suggest that water depth and salinity are controlling factors of foraminifer distribution in surface sediments of the Pearl River Estuary. Furthermore, sediment type, water dynamics, and sedimentary rate are influencing factors as well, and the latter two factors respectively affect the content and abundance of foraminifer groups in sediments.
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