Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands
Global climate models predict that precipitation regimes will change, generating great impacts on various ecosystem processes and functions. Therefore, it is important to know how drought and precipitation increases would affect the soil microorganims and plants. We established a precipitation manip...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2023
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/14364 https://www.sciencedirect.com/science/article/pii/S0031405623000112 https://doi.org/10.1016/j.pedobi.2023.150873 |
| _version_ | 1855485348275027968 |
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| author | Toledo, Santiago Gargaglione, Veronica Beatriz Yahdjian, Laura Peri, Pablo Luis |
| author_browse | Gargaglione, Veronica Beatriz Peri, Pablo Luis Toledo, Santiago Yahdjian, Laura |
| author_facet | Toledo, Santiago Gargaglione, Veronica Beatriz Yahdjian, Laura Peri, Pablo Luis |
| author_sort | Toledo, Santiago |
| collection | INTA Digital |
| description | Global climate models predict that precipitation regimes will change, generating great impacts on various ecosystem processes and functions. Therefore, it is important to know how drought and precipitation increases would affect the soil microorganims and plants. We established a precipitation manipulation experiment, with treatments ranging from 54% reduction (drought) to 54% increases (irrigation) in a semiarid ecosystem, and measured microbial carbon (MBC) and nitrogen (MBN), soil basal respiration (SBR), microbial metabolic coefficients (qCO2), and estimated the sequestration and fluxes of CO2 by soil microorganisms. While simulated
drought did not modify the microbial community attributes, the microbial biomass increased with greater precipitation, which in the long term could lead to greater carbon (C) sequestration by the microbial pathway and a decline in potential CO2 emissions into the atmosphere. This study shows that microorganisms of the semiarid soil are able to withstand drought and are possibly able to adopt resistance mechanisms under dry conditions. However, drought or increased precipitation did not affect SBR. The results showed that plants’ and soil microorganisms’ responses to precipitation change were asymmetric and different. The study quantifies the
contributions of microorganisms to sequestered C by soil microbial biomass (≈35 g MBC m− 2) and CO2 fluxes to the atmosphere (removed in MBC ≈127 g CO2 m− 2 and emission by SBR ≈876 g CO2 m− 2 yr− 1) in semiarid ecosystems. This study not only increases our understanding of the adaptation of soil microorganisms to precipitation changes but also provides new insight into the contributions of the microorganisms when modeling and projecting implications for C cycling. |
| format | Artículo |
| id | INTA14364 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA143642023-06-26T09:41:04Z Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands Toledo, Santiago Gargaglione, Veronica Beatriz Yahdjian, Laura Peri, Pablo Luis Grasslands Semiarid Zones Microorganisms Soil Precipitation Drought Microbiomes Irrigation Carbon Sequestration Praderas Zona Semiárida Microorganismos Suelo Precipitación Atmosférica Sequía Microbiomas Riego Secuestro de Carbono Santa Cruz (Argentina) Accumulation Soil Carbon Microbial Communities CO2 Fluxes Microbial Biomass Acumulación de Carbono en el Suelo Comunidad Microbiana Flujos de CO2 Biomasa Microbiana Región Patagónica Global climate models predict that precipitation regimes will change, generating great impacts on various ecosystem processes and functions. Therefore, it is important to know how drought and precipitation increases would affect the soil microorganims and plants. We established a precipitation manipulation experiment, with treatments ranging from 54% reduction (drought) to 54% increases (irrigation) in a semiarid ecosystem, and measured microbial carbon (MBC) and nitrogen (MBN), soil basal respiration (SBR), microbial metabolic coefficients (qCO2), and estimated the sequestration and fluxes of CO2 by soil microorganisms. While simulated drought did not modify the microbial community attributes, the microbial biomass increased with greater precipitation, which in the long term could lead to greater carbon (C) sequestration by the microbial pathway and a decline in potential CO2 emissions into the atmosphere. This study shows that microorganisms of the semiarid soil are able to withstand drought and are possibly able to adopt resistance mechanisms under dry conditions. However, drought or increased precipitation did not affect SBR. The results showed that plants’ and soil microorganisms’ responses to precipitation change were asymmetric and different. The study quantifies the contributions of microorganisms to sequestered C by soil microbial biomass (≈35 g MBC m− 2) and CO2 fluxes to the atmosphere (removed in MBC ≈127 g CO2 m− 2 and emission by SBR ≈876 g CO2 m− 2 yr− 1) in semiarid ecosystems. This study not only increases our understanding of the adaptation of soil microorganisms to precipitation changes but also provides new insight into the contributions of the microorganisms when modeling and projecting implications for C cycling. EEA Santa Cruz Fil: Toledo, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. CIT Santa Cruz; Argentina. Fil: Toledo, Santiago: Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Gargaglione Verónica Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Gargaglione Verónica Beatriz. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Gargaglione Verónica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Yahdjian, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA); Argentina. Fil: Yahdjian, Laura. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. 2023-03-30T11:29:43Z 2023-03-30T11:29:43Z 2023-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14364 https://www.sciencedirect.com/science/article/pii/S0031405623000112 Toledo, S., Gargaglione, V., Yahdjian, L., & Peri, P. L. (2023). Differential Responses of Soil Microorganisms to Precipitation Changes in Austral Semiarid Grasslands. Pedobiologia, 150873. Vol 97-98, 2023, Pages 1-10. https://doi.org/10.1016/j.pedobi.2023.150873. 0031-4056 https://doi.org/10.1016/j.pedobi.2023.150873 eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Elsevier Pedobiologia 97-98 : 1-10 (2023) |
| spellingShingle | Grasslands Semiarid Zones Microorganisms Soil Precipitation Drought Microbiomes Irrigation Carbon Sequestration Praderas Zona Semiárida Microorganismos Suelo Precipitación Atmosférica Sequía Microbiomas Riego Secuestro de Carbono Santa Cruz (Argentina) Accumulation Soil Carbon Microbial Communities CO2 Fluxes Microbial Biomass Acumulación de Carbono en el Suelo Comunidad Microbiana Flujos de CO2 Biomasa Microbiana Región Patagónica Toledo, Santiago Gargaglione, Veronica Beatriz Yahdjian, Laura Peri, Pablo Luis Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| title | Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| title_full | Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| title_fullStr | Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| title_full_unstemmed | Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| title_short | Differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| title_sort | differential responses of soil microorganisms to precipitation changes in austral semiarid grasslands |
| topic | Grasslands Semiarid Zones Microorganisms Soil Precipitation Drought Microbiomes Irrigation Carbon Sequestration Praderas Zona Semiárida Microorganismos Suelo Precipitación Atmosférica Sequía Microbiomas Riego Secuestro de Carbono Santa Cruz (Argentina) Accumulation Soil Carbon Microbial Communities CO2 Fluxes Microbial Biomass Acumulación de Carbono en el Suelo Comunidad Microbiana Flujos de CO2 Biomasa Microbiana Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/14364 https://www.sciencedirect.com/science/article/pii/S0031405623000112 https://doi.org/10.1016/j.pedobi.2023.150873 |
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