Effects of precipitation change and nitrogen addition on the composition, diversity, and molecular ecological network of soil bacterial communities in a desert steppe
| Autor: | Huijun Gu, Yuhua Liu, Lina Xie, Chenyu Zhao, Fanhui Liu, Guogang Zhang, Lichun Wang, Zhiwei Gao, Meiqing Jia, Guodong Han, Meiqi Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Atmospheric Science Rain Soil Soil pH Chemical Precipitation Water content Soil Microbiology Multidisciplinary Deserts Ecology Community structure Chemical Reactions Soil chemistry 04 agricultural and veterinary sciences Soil Ecology Terrestrial Environments Chemistry Community Ecology Physical Sciences Medicine Desert Climate Soil microbiology Network Analysis Research Article Computer and Information Sciences China Nitrogen Science Soil Science complex mixtures Ecosystems 03 medical and health sciences Meteorology Soil ecology Ecosystem Community Structure Bacteria Desert climate Ecology and Environmental Sciences Organisms Biology and Life Sciences 030104 developmental biology 040103 agronomy & agriculture Earth Sciences 0401 agriculture forestry and fisheries Environmental science |
| Zdroj: | PLoS ONE PLoS ONE, Vol 16, Iss 3, p e0248194 (2021) |
| ISSN: | 1932-6203 |
| Popis: | Currently, the impact of changes in precipitation and increased nitrogen(N) deposition on ecosystems has become a global problem. In this study, we conducted a 8-year field experiment to evaluate the effects of interaction between N deposition and precipitation change on soil bacterial communities in a desert steppe using high-throughput sequencing technology. The results revealed that soil bacterial communities were sensitive to precipitation addition but were highly tolerant to precipitation reduction. Reduced precipitation enhanced the competitive interactions of soil bacteria and made the ecological network more stable. Nitrogen addition weakened the effect of water addition in terms of soil bacterial diversity and community stability, and did not have an interactive influence. Moreover, decreased precipitation and increased N deposition did not have a superimposed effect on soil bacterial communities in the desert steppe. Soil pH, moisture content, and NH4+-N and total carbon were significantly related to the structure of bacterial communities in the desert steppe. Based on network analysis and relative abundance, we identified Actinobacteria, Proteobacteria, Acidobacteria and Cyanobacteria members as the most important keystone bacteria that responded to precipitation changes and N deposition in the soil of the desert steppe. In summary, we comprehensively analyzed the responses of the soil bacterial community to precipitation changes and N deposition in a desert steppe, which provides a model for studying the effects of ecological factors on bacterial communities worldwide. |
| Databáze: | OpenAIRE |
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