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首页> 美国卫生研究院文献>Saudi Journal of Biological Sciences >Soil ciliates of the Indian Delhi Region: Their community characteristics with emphasis on their ecological implications as sensitive bio-indicators for soil quality
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Soil ciliates of the Indian Delhi Region: Their community characteristics with emphasis on their ecological implications as sensitive bio-indicators for soil quality

机译：印度德里地区的土壤纤毛虫：其群落特征尤其是对土壤质量的敏感生物指示剂所具有的生态意义

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The present investigation aims to study the diversity of ciliates from different habitats in and around Delhi, India, and the correlation of this diversity with soil quality {agricultural lands (site 1 and 2), dump yards (site 3 and 4), sewage treatment plant (site 5), residential land (site 6), landfill (site 7) and barren land (site 8)}. Various physicochemical parameters of the different soil samples were studied and analysed for soil texture, interstitial water, pH, conductivity, total organic carbon, total organic matter, total nitrogen and phosphorous content, using standard protocols. Seventeen ciliate taxa belonging to four classes, seven orders, ten families, and 17 genera were recorded, with the maximum number of species (eleven) belonging to the class Spirotrichea. Ciliate diversity was highest at sites 5 and 6 and lowest at sites 1 and 2. Spathidium sp. was the dominant species in the conditioned land (site 8), while the ciliate Colpoda sp. was present in all the sites examined, showing the highest population density in the sewage treatment plant site (site 5). Statistical analysis showed that ciliate diversity was positively correlated to physicochemical parameters such as interstitial water, total organic matter and organic carbon, total nitrogen and total phosphorous content. Analyses of spirotrichs/colpodids (S/C) ratio and diversity indices implied that the habitat conditions of sites 1, 2, 3 and 8 are relatively unfavourable for soil ciliates to flourish; while sites 4, 5, 6 and 7 provided more favourable conditions. The ubiquity of ciliate distribution suggests their important role in the soil food webs and nutrient cycling, and their community structure and specific characteristics appear to be of major importance for soil formation. A full understanding of soil ciliate diversity and physicochemical parameters helps to inform best practice for improving soil quality as well as conservation practices for sustainable development and management of farms and cultivated lands. In conclusion, ciliate diversity serves as an important and sensitive bio-indicator for soil quality.
机译：本研究旨在研究印度德里及其周边地区不同生境的纤毛虫的多样性，以及该多样性与土壤质量（农业用地（站点1和2），垃圾场（站点3和4），污水处理）的相关性。厂（地点5），住宅用地（地点6），垃圾填埋场（地点7）和贫瘠土地（地点8）}。使用标准方案，研究并分析了不同土壤样品的各种理化参数，包括土壤质地，间隙水，pH，电导率，总有机碳，总有机质，总氮和磷含量。记录了17个纤毛类群，属于4个类，7个目，10个科和17个属，最大种类（11个）属于螺旋藻。纤毛虫的多样性在站点5和6最高，在站点1和2最低。是有条件的土地上的优势种（地点8），而纤毛虫Colpoda sp。。在所检查的所有站点中都存在，表明污水处理厂站点（站点5）中的人口密度最高。统计分析表明纤毛虫的多样性与间质水，总有机质和有机碳，总氮和总磷含量等理化参数呈正相关。螺旋藻/蜘蛛的比率（S / C）和多样性指数分析表明，站点1、2、3和8的生境条件相对不利于土壤纤毛虫蓬勃发展。而站点4、5、6和7提供了更有利的条件。纤毛虫分布的普遍性表明它们在土壤食物网和养分循环中的重要作用，它们的群落结构和特定特征似乎对土壤形成至关重要。对土壤纤毛虫的多样性和理化参数的全面了解有助于为改善土壤质量的最佳做法以及为农场和耕地的可持续发展与管理所采取的保护措施提供参考。总之，纤毛虫多样性是土壤质量的重要且敏感的生物指标。

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