Jayaraju N, Sundara Raja Reddy B C, Reddy K R
Department of Geology, Sri Venkateswara University, Tirupati 517 502, India.
Environ Monit Assess. 2008 Jul;142(1-3):319-23. doi: 10.1007/s10661-007-9931-8. Epub 2007 Nov 6.
A study of benthic foraminiferal species was carried out along Nellore Coast of South India. Analysis of surfacial sediment samples from the study area shows enrichment in heavy metals (Cr, Cu, Pb and Zn). The environment has become so lethal to foraminifera that minimal species number (4-7) can currently preserved in living condition in a depth less than 5-fth contour from coast. Samples from outfalls which receive only agricultural and aquacultural drainage water show heavy metal concentrations slightly higher to natural baseline levels, and yielding, living foraminifera (10-15). The frequent occurrence of deformed and abnormal specimens in Industrial outfalls, comparable to aquacultural and agricultural outlets reveal that (a) benthic foraminifera are more sensitive to industrial wastes containing heavy metals, (b) agricultural and aquacultural wastes do not significantly harm benthic foraminifera, and (c) morphological abnormalities of the foraminiferal tests depend upon the nature of the pollutant.
在印度南部内洛尔海岸沿线开展了一项底栖有孔虫物种研究。对研究区域表层沉积物样本的分析表明，重金属（铬、铜、铅和锌）含量有所富集。该环境对有孔虫来说已变得极具致命性，以至于目前在距离海岸小于5英寻等高线的深度处，仅能有极少数量的物种（4 - 7种）以活体状态保存下来。仅接收农业和水产养殖排水的排污口样本显示，重金属浓度略高于自然基线水平，且有活体有孔虫（10 - 15种）。与水产养殖和农业排污口相比，工业排污口中频繁出现变形和异常的标本，这表明：（a）底栖有孔虫对含重金属的工业废物更为敏感；（b）农业和水产养殖废物对底栖有孔虫没有显著危害；（c）有孔虫测试的形态异常取决于污染物的性质。
