Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina
Soil microorganisms communities regulate key functions in terrestrial ecosystems and contributes to the formation of stable organic matter and hence climate change mitigation. The structure, diversity and activity of soil microbial communities are influenced by the quantity and quality of organic co...
| Main Authors: | , , , , |
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| Format: | Artículo |
| Language: | Inglés |
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Elsevier
2020
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| Online Access: | http://hdl.handle.net/20.500.12123/7854 https://www.sciencedirect.com/science/article/pii/S0140196320301993 https://doi.org/10.1016/j.jaridenv.2020.104300 |
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| author | Toledo, Santiago Peri, Pablo Luis Correa, Olga S. Gargaglione, Veronica Beatriz Gonzalez Polo, Marina |
| author_browse | Correa, Olga S. Gargaglione, Veronica Beatriz Gonzalez Polo, Marina Peri, Pablo Luis Toledo, Santiago |
| author_facet | Toledo, Santiago Peri, Pablo Luis Correa, Olga S. Gargaglione, Veronica Beatriz Gonzalez Polo, Marina |
| author_sort | Toledo, Santiago |
| collection | INTA Digital |
| description | Soil microorganisms communities regulate key functions in terrestrial ecosystems and contributes to the formation of stable organic matter and hence climate change mitigation. The structure, diversity and activity of soil microbial communities are influenced by the quantity and quality of organic compounds entering soils through the contribution of their root exudates and plant litter, which the microorganisms use as a substrate for biosynthesis and energy source. However, grazing effect on the soil microorganisms showed variable results dependent on the ecosystem under study. One of the main challenges of this millennium is the sustainability of agricultural production, especially in fragile soils such as those present in Patagonia. Therefore, our objective was to evaluate the responses of microbial biomass carbon (MBC), soil basal respiration (SBR), the derived coefficients and the abundance of fungi and bacteria under contrasting long-term grazing intensities in an environmental gradient. The study was established in three ecological areas Mata Negra Thicket (MNT), Dry Magellanic Steppe (DMS) and Humid Magellanic Steppe (HMS) with two grazing intensities. Soil samples were taken over two years in different seasons (autumn, winter, spring and summer). Results showed that biotic and abiotic factors (temperature and precipitation), plant communities and soil characteristics modulated the microbial structure and function in ecological area. On the other hand, high grazing intensity decreased the MBC and microbial coefficient (qM). There was a seasonal and interannual dynamic in the MBC and the bacteria and fungal communities, attributed mainly to temperature and precipitation. The results indicated that the effect of grazing intensity in soil microbial communities depends largely on intrinsic characteristics of each ecological area defined by the environmental gradient. |
| format | Artículo |
| id | INTA7854 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA78542021-01-20T13:37:51Z Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina Toledo, Santiago Peri, Pablo Luis Correa, Olga S. Gargaglione, Veronica Beatriz Gonzalez Polo, Marina Biología del Suelo Microorganismos del Suelo Medio Ambiente Pastoreo Ecosistema Soil Biology Soil Microorganisms Environment Grazing Ecosystems Región Patagónica Soil microorganisms communities regulate key functions in terrestrial ecosystems and contributes to the formation of stable organic matter and hence climate change mitigation. The structure, diversity and activity of soil microbial communities are influenced by the quantity and quality of organic compounds entering soils through the contribution of their root exudates and plant litter, which the microorganisms use as a substrate for biosynthesis and energy source. However, grazing effect on the soil microorganisms showed variable results dependent on the ecosystem under study. One of the main challenges of this millennium is the sustainability of agricultural production, especially in fragile soils such as those present in Patagonia. Therefore, our objective was to evaluate the responses of microbial biomass carbon (MBC), soil basal respiration (SBR), the derived coefficients and the abundance of fungi and bacteria under contrasting long-term grazing intensities in an environmental gradient. The study was established in three ecological areas Mata Negra Thicket (MNT), Dry Magellanic Steppe (DMS) and Humid Magellanic Steppe (HMS) with two grazing intensities. Soil samples were taken over two years in different seasons (autumn, winter, spring and summer). Results showed that biotic and abiotic factors (temperature and precipitation), plant communities and soil characteristics modulated the microbial structure and function in ecological area. On the other hand, high grazing intensity decreased the MBC and microbial coefficient (qM). There was a seasonal and interannual dynamic in the MBC and the bacteria and fungal communities, attributed mainly to temperature and precipitation. The results indicated that the effect of grazing intensity in soil microbial communities depends largely on intrinsic characteristics of each ecological area defined by the environmental gradient. EEA Santa Cruz Fil: Toledo, Santiago. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Correa, Olga S. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos; Argentina Fil: Gargaglione, Veronica Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Gonzalez Polo, Marina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Fil: Toledo, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gargaglione, Veronica Beatriz. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Gargaglione, Veronica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gonzalez Polo, Marina. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina 2020-09-09T14:49:19Z 2020-09-09T14:49:19Z 2020 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7854 https://www.sciencedirect.com/science/article/pii/S0140196320301993 0140-1963 https://doi.org/10.1016/j.jaridenv.2020.104300 eng info:eu-repo/semantics/openAccess 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 Journal of Arid Environments 184 : 104300 (January 2021) |
| spellingShingle | Biología del Suelo Microorganismos del Suelo Medio Ambiente Pastoreo Ecosistema Soil Biology Soil Microorganisms Environment Grazing Ecosystems Región Patagónica Toledo, Santiago Peri, Pablo Luis Correa, Olga S. Gargaglione, Veronica Beatriz Gonzalez Polo, Marina Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina |
| title | Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina |
| title_full | Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina |
| title_fullStr | Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina |
| title_full_unstemmed | Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina |
| title_short | Soil microbial communities respond to an environmental gradient of grazing intensity in south Patagonia Argentina |
| title_sort | soil microbial communities respond to an environmental gradient of grazing intensity in south patagonia argentina |
| topic | Biología del Suelo Microorganismos del Suelo Medio Ambiente Pastoreo Ecosistema Soil Biology Soil Microorganisms Environment Grazing Ecosystems Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/7854 https://www.sciencedirect.com/science/article/pii/S0140196320301993 https://doi.org/10.1016/j.jaridenv.2020.104300 |
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