Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands

The current and expected expansion of agriculture in the drylands of Mexico, together with the decrease in precipitation occurring in the country, likely affect ecosystem processes and will bring great challenges for the suitability of rainfed agriculture for smallholder farmers. Here, we assessed m...

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Autores principales:	Thalita F. Abbruzzini, Morena Avitia, Karen Carrasco-Espinosa, Víctor Peña, Alberto Barrón-Sandoval, Ulises Isaac Salazar Cabrera, Rocío Cruz-Ortega, Mariana Benítez, Ana E. Escalante, Julieta A. Rosell, Ana Wegier, Julio Campo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	climate change drought enzyme stoichiometry smallholder farming soil biogeochemistry Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/c2dafc244471451c840d462844295da3
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spelling	oai:doaj.org-article:c2dafc244471451c840d462844295da32021-11-11T19:33:04ZPrecipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands10.3390/su1321118482071-1050https://doaj.org/article/c2dafc244471451c840d462844295da32021-10-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/21/11848https://doaj.org/toc/2071-1050The current and expected expansion of agriculture in the drylands of Mexico, together with the decrease in precipitation occurring in the country, likely affect ecosystem processes and will bring great challenges for the suitability of rainfed agriculture for smallholder farmers. Here, we assessed metrics of the soil C, N, and P cycles, as well as soil microbial diversity, under rainfed maize and common bean cropping in arid and semiarid regions of central Mexico. The soil enzymatic vector angles of cultivated plots in both regions were above 45°, suggesting P limitation for microbial growth and crop productivity. Although changes were not observed in the intensity of this P-limitation with aridity, we found a negative effect of drought increase on the concentration of soil organic C and total N, with consequences for the C, N, and P balance in soils. Increasing aridity leads to the homogenization of microbial diversity. Considering a scenario in which decreases in mean annual precipitation would uncouple the biogeochemical cycles and homogenize soil biodiversity, the ecological implications could be an increase in the vulnerability of agricultural ecosystems to drought, with negative consequences for the suitability of rainfed agriculture in the drylands of central Mexico.Thalita F. AbbruzziniMorena AvitiaKaren Carrasco-EspinosaVíctor PeñaAlberto Barrón-SandovalUlises Isaac Salazar CabreraRocío Cruz-OrtegaMariana BenítezAna E. EscalanteJulieta A. RosellAna WegierJulio CampoMDPI AGarticleclimate changedroughtenzyme stoichiometrysmallholder farmingsoil biogeochemistryEnvironmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 11848, p 11848 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	climate change drought enzyme stoichiometry smallholder farming soil biogeochemistry Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	climate change drought enzyme stoichiometry smallholder farming soil biogeochemistry Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Thalita F. Abbruzzini Morena Avitia Karen Carrasco-Espinosa Víctor Peña Alberto Barrón-Sandoval Ulises Isaac Salazar Cabrera Rocío Cruz-Ortega Mariana Benítez Ana E. Escalante Julieta A. Rosell Ana Wegier Julio Campo Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands
description	The current and expected expansion of agriculture in the drylands of Mexico, together with the decrease in precipitation occurring in the country, likely affect ecosystem processes and will bring great challenges for the suitability of rainfed agriculture for smallholder farmers. Here, we assessed metrics of the soil C, N, and P cycles, as well as soil microbial diversity, under rainfed maize and common bean cropping in arid and semiarid regions of central Mexico. The soil enzymatic vector angles of cultivated plots in both regions were above 45°, suggesting P limitation for microbial growth and crop productivity. Although changes were not observed in the intensity of this P-limitation with aridity, we found a negative effect of drought increase on the concentration of soil organic C and total N, with consequences for the C, N, and P balance in soils. Increasing aridity leads to the homogenization of microbial diversity. Considering a scenario in which decreases in mean annual precipitation would uncouple the biogeochemical cycles and homogenize soil biodiversity, the ecological implications could be an increase in the vulnerability of agricultural ecosystems to drought, with negative consequences for the suitability of rainfed agriculture in the drylands of central Mexico.
format	article
author	Thalita F. Abbruzzini Morena Avitia Karen Carrasco-Espinosa Víctor Peña Alberto Barrón-Sandoval Ulises Isaac Salazar Cabrera Rocío Cruz-Ortega Mariana Benítez Ana E. Escalante Julieta A. Rosell Ana Wegier Julio Campo
author_facet	Thalita F. Abbruzzini Morena Avitia Karen Carrasco-Espinosa Víctor Peña Alberto Barrón-Sandoval Ulises Isaac Salazar Cabrera Rocío Cruz-Ortega Mariana Benítez Ana E. Escalante Julieta A. Rosell Ana Wegier Julio Campo
author_sort	Thalita F. Abbruzzini
title	Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands
title_short	Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands
title_full	Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands
title_fullStr	Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands
title_full_unstemmed	Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands
title_sort	precipitation controls on soil biogeochemical and microbial community composition in rainfed agricultural systems in tropical drylands
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c2dafc244471451c840d462844295da3
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Precipitation Controls on Soil Biogeochemical and Microbial Community Composition in Rainfed Agricultural Systems in Tropical Drylands

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