Impacts of Projected Climate Warming and Wetting on Soil Microbial Communities in Alpine Grassland Ecosystems of the Tibetan Plateau
DNA, Bacterial
Bacterial 16S rRNA
550
Nitrogen
Climate Change
Alpine grassland
Warming and wetting
Soil
03 medical and health sciences
Bacterial Proteins
Ammonia
RNA, Ribosomal, 16S
XXXXXX - Unknown
Climate change
Phylogeny
Enzyme Assays
0303 health sciences
Bacteria
Microbiota
500
Biodiversity
Sequence Analysis, DNA
Nitrogen Cycle
15. Life on land
Grassland
Nitrification
Enzyme Activation
Genes, Bacterial
13. Climate action
Denitrification
Environmental Monitoring
DOI:
10.1007/s00248-017-1098-4
Publication Date:
2017-11-09T17:43:25Z
AUTHORS (8)
ABSTRACT
Climate change is projected to have impacts on precipitation and temperature regimes in drylands of high elevation regions, with especially large effects in the Qinghai-Tibetan Plateau. However, there was limited information about how the projected climate change will impact on the soil microbial community and their activity in the region. Here, we present results from a study conducted across 72 soil samples from 24 different sites along a temperature and precipitation gradient (substituted by aridity index ranging from 0.079 to 0.89) of the Plateau, to assess how changes in aridity affect the abundance, community composition, and diversity of bacteria, ammonia-oxidizers, and denitrifers (nirK/S and nosZ genes-containing communities) as well as nitrogen (N) turnover enzyme activities. We found V-shaped or inverted V-shaped relationships between the aridity index (AI) and soil microbial parameters (gene abundance, community structures, microbial diversity, and N turnover enzyme activities) with a threshold at AI = 0.27. The increasing or decreasing rates of the microbial parameters were higher in areas with AI < 0.27 (alpine steppes) than in mesic areas with 0.27 < AI < 0.89 (alpine meadow and swamp meadow). The results indicated that the projected warming and wetting have a strong impact on soil microbial communities in the alpine steppes.
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CITATIONS (20)
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