Impact of metal polluted sewage water on soil nematode assemblages in agricultural settings of Aligarh,India  

作　　者：Mohammed F.S.A.Ghanem Shahid Afzal Humira Nesar Zarrin Imran Wasim Ahmad 

机构地区：[1]Nematode Biodiversity Research Lab,Department of Zoology,Aligarh Muslim University,Aligarh 202002,India

出　　处：《Soil Ecology Letters》2024年第1期61-75,共15页土壤生态学快报（英文）

摘　　要：Sewage water in agriculture threatens human health and soil ecosystems through metal pollution.Nematodes show promise as bioindicators of soil health due to their abundance and position in soil food webs.Metal-polluted water decreased abundance of certain nematode groups and Sigma Maturity Index.Metal pollution positively affected nematode groups with r-selected life cycles.Sewage water has been inappropriately used in agriculture,posing possible threats to human health and the soil ecosystems by its constituent pollutants,especially heavy metals.Correct evaluation of its influences on soil biomes needs to consider the response of soil fauna.Among soil organisms,nematodes are seen as the best promising candidates for bioindicators of soil health.Here in,we collected soil samples from fresh water irrigated field from three sites(S1,S2 and S3)and sewage water irrigated distance gradient(5 m-40 m),to assess the influence of metal(Cu,Zn,Cd,Mn,Pb)polluted water on various characteristics of nematode communities.The results indicated that the heavy metals decreased the abundance of C-p3 nematodes,herbivores,and predatory nematodes as well as sigma maturity index,whereas,C-p1,C-p2,bacterivore and fungivore nematodes abundance and diversity positively responded to the metal pollution.Generally,nematode genera with r-selected life cycle were positively affected and those with K-selected life cycle were negatively affected by metal pollution.Overall nematode community has potential to be used as indicator of pollution stress in agricultural soils to check soil health and sustainability.

关 键 词：heavy metals sewage irigation agriculture nematodes BIOINDICATORS 

分 类 号：S15[农业科学—土壤学]