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Ecological network analysis reveals distinctive microbial modules associated with heavy metal contamination of abandoned mine soils in Korea.
Chun, Seong-Jun; Kim, Young-Joong; Cui, Yingshun; Nam, Kyong-Hee.
Affiliation
  • Chun SJ; LMO Research Team, National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon, 33657, Republic of Korea.
  • Kim YJ; LMO Research Team, National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon, 33657, Republic of Korea.
  • Cui Y; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology, 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
  • Nam KH; LMO Research Team, National Institute of Ecology, 1210 Geumgang-ro, Maseo-myeon, Seocheon, 33657, Republic of Korea. Electronic address: khnam@nie.re.kr.
Environ Pollut ; 289: 117851, 2021 Nov 15.
Article in En | MEDLINE | ID: mdl-34358869
Heavy metal pollution in soil around abandoned mine sites is one of the most critical environmental issues worldwide. Soil microbes form complex communities and perform ecological functions individually or in cooperation with other organisms to adapt to harsh environments. In this study, we investigated the distribution patterns of bacterial and fungal communities in non-contaminated and heavy metal-contaminated soil of the abandoned Samkwang mine in Korea to explore microbial interaction mechanisms and their modular structures. As expected, the bacterial and fungal community structures showed large differences depending on the degree of heavy metal contamination. The microbial network was divided into three modules based on the levels of heavy metal pollution: heavy metal-tolerant (HM-Tol), heavy metal-mid-tolerant (HM-mTol), and heavy metal-sensitive (HM-Sens) modules. Taxonomically, microbes assigned to Vicinamibacterales, Pedosphaeraceae, Nitrosomonadaceae, and Gemmatimonadales were the major groups constituting the HM-Tol module. Among the detected heavy metals (As, Pb, Cd, Cu, and Zn), copper concentrations played a key role in the formation of the HM-Tol module. In addition, filamentous fungi (Fusarium and Mortierella) showed potential interactions with bacteria (Nitrosomonadaceae) that could contribute to module stability in heavy metal-contaminated areas. Overall, heavy metal contamination was accompanied by distinct microbial communities, which could participate in the bioremediation of heavy metals. Analysis of the microbial interactions among bacteria and fungi in the presence of heavy metals could provide fundamental information for developing bioremediation mechanisms for the recovery of heavy metal-contaminated soil.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Soil Pollutants / Metals, Heavy Type of study: Risk_factors_studies Country/Region as subject: Asia Language: En Journal: Environ Pollut Journal subject: SAUDE AMBIENTAL Year: 2021 Document type: Article Country of publication: United kingdom

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Soil Pollutants / Metals, Heavy Type of study: Risk_factors_studies Country/Region as subject: Asia Language: En Journal: Environ Pollut Journal subject: SAUDE AMBIENTAL Year: 2021 Document type: Article Country of publication: United kingdom