Effects of two ecological earthworm species on atrazine degradation performance and bacterial community structure in red soil

Lin, Zhong and Zhen, Zhen and Ren, Lei and Yang, Jiewen and Luo, Chunling and Zhong, Laiyuan and Hu, Hanqiao and Zhang, Yueqin and Li, Yongtao and Zhang, Dayi (2018) Effects of two ecological earthworm species on atrazine degradation performance and bacterial community structure in red soil. Chemosphere, 196. pp. 467-475. ISSN 0045-6535

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Abstract

Vermicomposting is an effective and environmentally friendly approach for eliminating soil organic contamination. Atrazine is one of the most commonly applied triazinic herbicides and frequently detected in agricultural soils. This study investigated the roles and mechanisms of two earthworm species (epigeic Eisenia foetida and endogeic Amynthas robustus) in microbial degradation of atrazine. Both earthworms accelerated atrazine degradation performance from 39.0% in sterile soils to 94.9%–95.7%, via neutralizing soil pH, consuming soil humus, altering bacterial community structure, enriching indigenous atrazine degraders and excreting the intestinal atrazine-degrading bacteria. Rhodoplanes and Kaistobacter were identified as soil indigenous degraders for atrazine mineralization and stimulated by both earthworm species. A. robustus excreted the intestinal Cupriavidus and Pseudomonas, whereas Flavobacterium was released by E. foetida. This study provides a comprehensive understanding of the distinct effects of two earthworm species on soil microbial community and atrazine degradation, offering technical supports to apply vermicomposting in effective soil bioremediation.

Item Type:
Journal Article
Journal or Publication Title:
Chemosphere
Additional Information:
This is the author’s version of a work that was accepted for publication in Chemosphere. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemosphere, 196, 2018 DOI: 10.1016/j.chemosphere.2017.12.177
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600
Subjects:
ID Code:
89659
Deposited By:
Deposited On:
12 Jan 2018 09:44
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Dec 2020 04:33