Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems
Soil salinity is a serious problem for agriculture in coastal regions. Nevertheless, the effects of soil salinity on microbial community composition and their metabolic activities are far from clear. To improve such understanding, we studied microbial diversity, community composition, and potential...
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MDPI AG
2022-04-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/10/4/835 |
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| author | Yang Dong Jianwei Zhang Ruirui Chen Linghao Zhong Xiangui Lin Youzhi Feng |
| author_facet | Yang Dong Jianwei Zhang Ruirui Chen Linghao Zhong Xiangui Lin Youzhi Feng |
| author_sort | Yang Dong |
| collection | DOAJ |
| description | Soil salinity is a serious problem for agriculture in coastal regions. Nevertheless, the effects of soil salinity on microbial community composition and their metabolic activities are far from clear. To improve such understanding, we studied microbial diversity, community composition, and potential metabolic activity of agricultural soils covering non–, mild–, and severe–salinity. The results showed that salinity had no significant effect on bacterial richness; however, it was the major driver of a shift in bacterial community composition and it significantly reduced microbial activity. Abundant and diverse of microbial communities were detected in the severe–salinity soils with an enriched population of salt–tolerant species. Co–occurrence network analysis revealed stronger dependencies between species associated with severe salinity soils. Results of microcalorimetric technology indicated that, after glucose amendment, there was no significant difference in microbial potential activity among soils with the three salinity levels. Although the salt prolonged the lag time of microbial communities, the activated microorganisms had a higher growth rate. In conclusion, salinity shapes soil microbial community composition and reduces microbial activity. An addition of labile organic amendments can greatly alleviate salt restrictions on microbial activity, which provides new insight for enhancing microbial ecological functions in salt–affected soils. |
| first_indexed | 2024-03-09T04:22:34Z |
| format | Article |
| id | doaj.art-0ed5bc43441746cf91b08534428b5a76 |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-09T04:22:34Z |
| publishDate | 2022-04-01 |
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| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-0ed5bc43441746cf91b08534428b5a762023-12-03T13:45:24ZengMDPI AGMicroorganisms2076-26072022-04-0110483510.3390/microorganisms10040835Microbial Community Composition and Activity in Saline Soils of Coastal Agro–EcosystemsYang Dong0Jianwei Zhang1Ruirui Chen2Linghao Zhong3Xiangui Lin4Youzhi Feng5State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaMont Alto 1 Campus Drive, Pennsylvania State University, Mont Alto, PA 17237, USAState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaSoil salinity is a serious problem for agriculture in coastal regions. Nevertheless, the effects of soil salinity on microbial community composition and their metabolic activities are far from clear. To improve such understanding, we studied microbial diversity, community composition, and potential metabolic activity of agricultural soils covering non–, mild–, and severe–salinity. The results showed that salinity had no significant effect on bacterial richness; however, it was the major driver of a shift in bacterial community composition and it significantly reduced microbial activity. Abundant and diverse of microbial communities were detected in the severe–salinity soils with an enriched population of salt–tolerant species. Co–occurrence network analysis revealed stronger dependencies between species associated with severe salinity soils. Results of microcalorimetric technology indicated that, after glucose amendment, there was no significant difference in microbial potential activity among soils with the three salinity levels. Although the salt prolonged the lag time of microbial communities, the activated microorganisms had a higher growth rate. In conclusion, salinity shapes soil microbial community composition and reduces microbial activity. An addition of labile organic amendments can greatly alleviate salt restrictions on microbial activity, which provides new insight for enhancing microbial ecological functions in salt–affected soils.https://www.mdpi.com/2076-2607/10/4/835soil salinitymicrobial richnessmicrobial metabolic activityorganic Cmicrobial community composition |
| spellingShingle | Yang Dong Jianwei Zhang Ruirui Chen Linghao Zhong Xiangui Lin Youzhi Feng Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems Microorganisms soil salinity microbial richness microbial metabolic activity organic C microbial community composition |
| title | Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems |
| title_full | Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems |
| title_fullStr | Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems |
| title_full_unstemmed | Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems |
| title_short | Microbial Community Composition and Activity in Saline Soils of Coastal Agro–Ecosystems |
| title_sort | microbial community composition and activity in saline soils of coastal agro ecosystems |
| topic | soil salinity microbial richness microbial metabolic activity organic C microbial community composition |
| url | https://www.mdpi.com/2076-2607/10/4/835 |
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