Soil microbial composition and carbon mineralization are associated with vegetation type and temperature regime in mesocosms of a semiarid ecosystem.

Autor:	Avitia M; Laboratorio Nacional de Ciencias de la Sostenibilidad (LANCIS), Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico., Barrón-Sandoval A; Laboratorio Nacional de Ciencias de la Sostenibilidad (LANCIS), Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico.; Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, 92697, USA., Hernández-Terán A; Laboratorio Nacional de Ciencias de la Sostenibilidad (LANCIS), Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico., Benítez M; Laboratorio Nacional de Ciencias de la Sostenibilidad (LANCIS), Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico.; C3, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico., Barron-Gafford GA; School of Geography and Development, University of Arizona, Tucson, AZ, 85721, USA., Dontsova K; Department of Environmental Science, University of Arizona, Tucson, AZ, 85721, USA., Pavao-Zuckerman MA; Department of Environmental Science and Technology, University of Maryland, College Park, College Park, MD, 20742, USA., Escalante AE; Laboratorio Nacional de Ciencias de la Sostenibilidad (LANCIS), Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico.
Jazyk:	angličtina
Zdroj:	FEMS microbiology letters [FEMS Microbiol Lett] 2021 Mar 03; Vol. 368 (4).
DOI:	10.1093/femsle/fnab012
Abstrakt:	Transition from historic grasslands to woody plants in semiarid regions has led to questions about impacts on soil functioning, where microorganisms play a primary role. Understanding the relationship between microbes, plant diversity and soil functioning is relevant to assess such impacts. We evaluate the effect that plant type change in semiarid ecosystems has for microbial diversity and composition, and how this is related to carbon mineralization (CMIN) as a proxy for soil functioning. We followed a mesocosm experiment during 2 years within the Biosphere 2 facility in Oracle, AZ, USA. Two temperature regimes were established with two types of plants (grass or mesquite). Soil samples were analyzed for physicochemical and functional parameters, as well as microbial community composition using 16S rRNA amplicon metagenomics (Illumina MiSeq). Our results show the combined role of plant type and temperature regime in CMIN, where CMIN in grass has lower values at elevated temperatures compared with the opposite trend in mesquite. We also found a strong correlation of microbial composition with plant type but not with temperature regime. Overall, we provide evidence of the major effect of plant type in the specific composition of microbial communities as a potential result of the shrub encroachment. (© The Author(s) 2021. Published by Oxford University Press on behalf of FEMS.)
Databáze:	MEDLINE
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