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
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Publicado: MDPI AG 2021
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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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