2012
DOI: 10.1111/gcb.12065
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Responses of the functional structure of soil microbial community to livestock grazing in the Tibetan alpine grassland

Abstract: Microbes play key roles in various biogeochemical processes, including carbon (C) and nitrogen (N) cycling. However, changes of microbial community at the functional gene level by livestock grazing, which is a global land-use activity, remain unclear. Here we use a functional gene array, GeoChip 4.0, to examine the effects of free livestock grazing on the microbial community at an experimental site of Tibet, a region known to be very sensitive to anthropogenic perturbation and global warming. Our results showe… Show more

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Cited by 248 publications
(183 citation statements)
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References 88 publications
(103 reference statements)
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“…The grazing effects on plant diversity have been documented in other ecosystems (Milchunas and Lauenroth 1993), and they may occur via altered competition among plant communities for resources (Collins et al 1998) or by creating environmental heterogeneity (Sommer 2000). Notably, plant diversity was strongly linked to microbial community composition in our previous grazing study (Yang et al 2013). These findings indicate a common linkage between plant diversity and functional gene compositions, regardless of grazing regime and site differences.…”
Section: Discussionsupporting
confidence: 53%
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“…The grazing effects on plant diversity have been documented in other ecosystems (Milchunas and Lauenroth 1993), and they may occur via altered competition among plant communities for resources (Collins et al 1998) or by creating environmental heterogeneity (Sommer 2000). Notably, plant diversity was strongly linked to microbial community composition in our previous grazing study (Yang et al 2013). These findings indicate a common linkage between plant diversity and functional gene compositions, regardless of grazing regime and site differences.…”
Section: Discussionsupporting
confidence: 53%
“…An instant grazing effect is the reduction of available forage quantity and plant species richness (Bullock et al 1994), whereas in this study, total plant biomass increased in the 3200-m post-grazing grassland soils, but decreased in the 3400-m post-grazing grassland soils (Table 2). For the belowground ecosystem, grazing imposed a common effect on soil microbial communities that predominated over site differences, as indicated by the decrease of the microbial C cycling gene abundance and the increase of microbial (Yang et al 2013). This reflected an instant response to the trampling, defoliation, defecation, and urination effects of grazing.…”
Section: Discussionmentioning
confidence: 99%
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