金属污染土壤生态系统影响土壤无脊椎动物种群结构和动态，导致物种分布的改变。这项研究的重点是班加罗尔周围污水灌溉农田的蚯蚓分布。采样区已报道的种属为 eugenius eugeniae， Lampito maurutii, Pontoscolex corethrurus, Polypheretima elongata, Perioynx发掘和爱森虫。对暴露于金属添加物土壤的蚯蚓进行的评价采食量和体重变化的实验室研究揭示了物种的特定模式。 eudrrilus eugeniae和Lampito maurutii ，而Pontoscolex corethrurus，锌暴露后体重呈下降趋势。与此相反，3种植物的体重均显著下降(p<0.05)。观察到的摄食和体重指数的变化同时影响生殖参数。三种植物的孵化率和繁殖功能均在添加铬的土壤中降低。相反,,,E的孵化率明显提高。eugeniea < / em >和< em > L。后，P。锌加标土壤暴露后岩心种数。 However, reproductive rate found to be increased in E.eugeniea and P.corethrurus with decreased trend in L.maurutii. Thus, use of sewage polluted water for irrigation purpose has led to increased soil metal concentration impacting earthworm physiology and distribution.