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Title: Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils

Abstract

Background and aims: Livestock grazing is a widely practiced land-use regime that can impose lingering effects on global biogeochemical cycles. Yet, elucidating the mechanisms of related eco-processes, which are largely mediated by the microbial community, remains challenging. Methods: In this work, we collected soil samples from two Tibetan grassland sites subjected to grazing in winter followed by a 3-month recovery. We then evaluated functional potentials of microbial communities via a metagenomic tool known as GeoChip 4.0. Results: Significant alterations were detected in post-grazing grassland soils, and further analysis showed that plant diversity was the best indicator of alterations in functional potentials. Relative abundances of labile C degradation genes decreased at the 3400-m site, but those of recalcitrant C degradation genes increased, which could be explained by the higher soil recalcitrant C input owing to their being substantially more forbs species at this site. Nitrification genes decreased at both sites, probably owing to increased soil moisture conducive to oxygen-limiting conditions. Relative abundance of denitrification genes increased at the 3200-m site, concomitant with increased N2O emissions. Conclusions: These findings demonstrated that functional gene compositions of the microbial community were altered in post-grazing grassland soils, and linked to soil biogeochemical processes.

Authors:
 [1];  [2];  [1];  [3];  [4];  [5];  [6];  [7];  [1]
  1. Tsinghua Univ., Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Tsinghua Univ., Beijing (China); Univ. of Oklahoma, Norman, OK (United States)
  4. Chinese Academy of Sciences (CAS), Xining (China)
  5. Chinese Academy of Sciences (CAS), Xining (China); Chinese Academy of Sciences (CAS), Lanzhou (China)
  6. Chinese Academy of Sciences (CAS), Chengdu (China)
  7. Tsinghua Univ., Beijing (China); Univ. of Oklahoma, Norman, OK (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
OSTI Identifier:
1567066
Grant/Contract Number:  
AC02-05CH11231; SC0004601
Resource Type:
Accepted Manuscript
Journal Name:
Plant and Soil
Additional Journal Information:
Journal Volume: 407; Journal Issue: 1-2; Journal ID: ISSN 0032-079X
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Microbial functional potential; Tibetan grassland; Post-winter grazing; GeoChip

Citation Formats

Wang, Mengmeng, Wang, Shiping, Wu, Linwei, Xu, Depeng, Lin, Qiaoyan, Hu, Yigang, Li, Xiangzhen, Zhou, Jizhong, and Yang, Yunfeng. Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils. United States: N. p., 2016. Web. doi:10.1007/s11104-016-2897-y.
Wang, Mengmeng, Wang, Shiping, Wu, Linwei, Xu, Depeng, Lin, Qiaoyan, Hu, Yigang, Li, Xiangzhen, Zhou, Jizhong, & Yang, Yunfeng. Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils. United States. https://doi.org/10.1007/s11104-016-2897-y
Wang, Mengmeng, Wang, Shiping, Wu, Linwei, Xu, Depeng, Lin, Qiaoyan, Hu, Yigang, Li, Xiangzhen, Zhou, Jizhong, and Yang, Yunfeng. Tue . "Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils". United States. https://doi.org/10.1007/s11104-016-2897-y. https://www.osti.gov/servlets/purl/1567066.
@article{osti_1567066,
title = {Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils},
author = {Wang, Mengmeng and Wang, Shiping and Wu, Linwei and Xu, Depeng and Lin, Qiaoyan and Hu, Yigang and Li, Xiangzhen and Zhou, Jizhong and Yang, Yunfeng},
abstractNote = {Background and aims: Livestock grazing is a widely practiced land-use regime that can impose lingering effects on global biogeochemical cycles. Yet, elucidating the mechanisms of related eco-processes, which are largely mediated by the microbial community, remains challenging. Methods: In this work, we collected soil samples from two Tibetan grassland sites subjected to grazing in winter followed by a 3-month recovery. We then evaluated functional potentials of microbial communities via a metagenomic tool known as GeoChip 4.0. Results: Significant alterations were detected in post-grazing grassland soils, and further analysis showed that plant diversity was the best indicator of alterations in functional potentials. Relative abundances of labile C degradation genes decreased at the 3400-m site, but those of recalcitrant C degradation genes increased, which could be explained by the higher soil recalcitrant C input owing to their being substantially more forbs species at this site. Nitrification genes decreased at both sites, probably owing to increased soil moisture conducive to oxygen-limiting conditions. Relative abundance of denitrification genes increased at the 3200-m site, concomitant with increased N2O emissions. Conclusions: These findings demonstrated that functional gene compositions of the microbial community were altered in post-grazing grassland soils, and linked to soil biogeochemical processes.},
doi = {10.1007/s11104-016-2897-y},
journal = {Plant and Soil},
number = 1-2,
volume = 407,
place = {United States},
year = {Tue Apr 19 00:00:00 EDT 2016},
month = {Tue Apr 19 00:00:00 EDT 2016}
}

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Free Publicly Available Full Text
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Cited by: 13 works
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Figures / Tables:

Table 1 Table 1: Repeated measures analysis of two-way ANOVAs of post-grazing and site effects on environmental attributes

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Works referencing / citing this record:

Divergent responses of ecosystem respiration components to livestock exclusion on the Qinghai Tibetan Plateau
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.