期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 626, 期 -, 页码 48-58出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.01.081
关键词
Soil bacterial diversity; Soil C storage; Land use types; Loess Plateau; High-throughput sequencing
资金
- National Natural Science Foundation of China [41671280]
- Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C6]
- Key Cultivation Project of the Chinese Academy of Sciences
Bacteria are widely distributed and play an important role in soil carbon (C) cycling. The impact of soil bacterial diversity on soil C storage has been well established, yet little is known about the underlying mechanisms and the interactions among them. Here, we examined the association between soil bacterial diversity and soil C storage in relation to vegetation restoration on the Loess Plateau. The dominant phyla among land use types (artificial forest, Af; natural shrubland, Ns; artificial grassland, Ag; natural grassland, Ng; slope cropland, Sc) were Acidobacteria, Actinobacteria, Alphaproteobacteria, and Betaproteobacteria, which transited from Acidobacteriadominant to Actinobacteria-dominant community due to vegetation restoration. Soil C storage and the Shannon diversity index of soil bacterial community (H-Bacteria) showed the orderNs N > Ng > Af > Ag > Sc, whereas no significant differencewas found in Good's coverage (p > .05). Further, a strong relationship was observed between the relative abundance of dominant bacterial groups and soil C storage (p < .05). Additionally, soil bacterial diversity was closely related to soil C storage based on the structural equation model (SEM) and generalized additive models (GAMs). Specifically, soil C storage had the largest deterministic effects, explaining >70% of the variation and suggesting a strong association between soil C storage and soil bacterial diversity. Overall, we propose that further studies are necessary with a focus on the soil bacterial groups with specific functions in relation to soil C storage on the Loess Plateau. (C) 2018 Elsevier B.V. All rights reserved.
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