Abundance and composition response of wheat field soil bacterial and fungal communities to elevated CO2 and increased air temperature
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The abundance and diversity of soil bacterial and fungal communities in a wheat field under elevated atmospheric CO2 concentrations and increased air temperatures were investigated using qPCR and pyrosequencing. Elevated CO2 concentrations significantly increased the abundances of bacteria and fungi, and an increase of air temperatures significantly reduced fungal abundance. We found that Proteobacteria, Bacteroidetes, Chloroflexi, and Ascomycota were the most abundant bacterial and fungal phyla in the wheat field soil. Elevated CO2 concentrations and increased air temperatures had no significant effect on the bacterial alpha diversity, whereas fungal richness was reduced under warming treatments. Moreover, we note that certain bacterial and fungal groups responded differentially to elevated CO2 concentrations and increased air temperatures, and fungal species were highly sensitive to climatic changes.
KeywordsElevated CO2 Warming Wheat field Microbial community Climate change
Quantitative real-time PCR
Principal coordinate analysis
Operational taxonomic units
We are grateful for the funding provide by the National Natural Science Foundation of China (41501304 and 31100083), “Special Fund for Agro-scientific Research in the Public Interest” (Impact of climate change on agricultural production of China, 200903003), and Natural Science Foundation from Educational Commission of Anhui Province (KJ2015A049).
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