藓类附生原生动物群落对汞铊矿重金属污染的监测

应用群落多样性特征指数和冗余分析法(RDA),对黔西南滥木厂汞铊矿的矿渣、废石、矿体和附近的石灰岩上的藓类附生原生动物与重金属污染的关系进行研究.经显微镜检,共发现藓类附生原生动物群落物种数为75种,原生动物丰度范围在2～504个.g-1.群落多样性指数结果表明,矿渣的重金属污染最严重.RDA分析结果表明,重金属污染对藓类附生原生动物群落结构变化有明显的影响,有些种类对重金属污染十分敏感或有一定的耐性.因此,藓类附生原生动物群落可用来监测矿区生态系统的重金属污染.

Monitoring of heavy metal pollution by moss-dwelling protozoa communities in a Hg-Tl mineralized area

By using community diversity index and redundancy analysis (RDA), the protozoa communities living on mosses and their relationships with heavy metal pollution were investigated from slags, abandoned ores, orebodies and nearby limestones in Lanmuchang Hg-Tl mineralized area, southwest Guizhou. A total of 75 taxa were identified by microscope. The protozoa species had an abundance range from 2 individuals•g-1 to 504 individuals•g-1 fresh weight of moss. The slag sites were most severely contaminated by heavy metals. The structural variations of protozoa community were dramatically affected by heavy metal pollution. Some species were found to be sensitive or resistant to heavy metal pollution. Therefore, the protozoa communities could be used to monitor heavy metal pollution in mineralized ecosystem.