Responses of Soil Bacterial Communities to Nitrogen Deposition and Precipitation Increment Are Closely Linked with Aboveground Community Variation

Microbial Ecology
Hui LiYong Jiang

Abstract

It has been predicted that precipitation and atmospheric nitrogen (N) deposition will increase in northern China; yet, ecosystem responses to the interactive effects of water and N remain largely unknown. In particular, responses of belowground microbial community to projected global change and their potential linkages to aboveground macro-organisms are rarely studied. In this study, we examined the responses of soil bacterial diversity and community composition to increased precipitation and multi-level N deposition in a temperate steppe in Inner Mongolia, China, and explored the diversity linkages between aboveground and belowground communities. It was observed that N addition caused the significant decrease in bacterial alpha-diversity and dramatic changes in community composition. In addition, we documented strong correlations of alpha- and beta-diversity between plant and bacterial communities in response to N addition. It was found that N enriched the so-called copiotrophic bacteria, but reduced the oligotrophic groups, primarily by increasing the soil inorganic N content and carbon availability and decreasing soil pH. We still highlighted that increased precipitation tended to alleviate the effects of N on bacterial dive...Continue Reading

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Citations

Dec 29, 2016·Molecular Ecology·Martin HartmannBeat Frey
May 4, 2021·Frontiers in Microbiology·Luigimaria BorrusoLorenzo Brusetti
Jul 27, 2021·Journal of Environmental Management·Yvonne Musavi Madegwa, Yoshitaka Uchida
Sep 28, 2021·Frontiers in Microbiology·Tingwen HuangYinguang Chen

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