Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems
Grazing is the predominant land use practice in arid environments; however, there are relatively few studies of grazing effects on ecosystem functioning. We assessed the impact of grazing on soil moisture, evapotranspiration (ET), canopy conductance (Gc), and root water uptake in the Patagonian step...
| Autores principales: | , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Acceso en línea: | https://onlinelibrary.wiley.com/doi/abs/10.1002/eco.1850 http://hdl.handle.net/20.500.12123/2930 https://doi.org/10.1002/eco.1850 |
| _version_ | 1855483147082268672 |
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| author | Pereyra, Daniel A. Bucci, Sandra Janet Arias, Nadia Soledad Ciano, Nicolas Francisco Cristiano, Piedad María Goldstein, Guillermo Hernan Scholz, Fabian Gustavo |
| author_browse | Arias, Nadia Soledad Bucci, Sandra Janet Ciano, Nicolas Francisco Cristiano, Piedad María Goldstein, Guillermo Hernan Pereyra, Daniel A. Scholz, Fabian Gustavo |
| author_facet | Pereyra, Daniel A. Bucci, Sandra Janet Arias, Nadia Soledad Ciano, Nicolas Francisco Cristiano, Piedad María Goldstein, Guillermo Hernan Scholz, Fabian Gustavo |
| author_sort | Pereyra, Daniel A. |
| collection | INTA Digital |
| description | Grazing is the predominant land use practice in arid environments; however, there are relatively few studies of grazing effects on ecosystem functioning. We assessed the impact of grazing on soil moisture, evapotranspiration (ET), canopy conductance (Gc), and root water uptake in the Patagonian steppe. Studies were done in 3 sites along a gradient of grazing intensity. High grazing intensity increased the soil water storage by 24% and decreased the amount of water extracted from deep layers compared to the low grazing intensity. Grazing affected ET and its partitioning into transpiration (T) and evaporation. High shrub cover and Gc increased ET and T or ET partitioning in the heavily grazed site. Annual ET increased from 78% to 92% of the annual precipitation from the lowest to the highest grazing intensity, respectively. Total T was 21% higher in the highest intensity site compared to the lowest intensity site. Changes in Gc suggest that grazing modified the canopy architecture, and thus the response of vegetation to environmental factors. At the beginning of the growing season when moisture was high, Gc exhibited the highest value in the heavily grazed site, but a strong regulation of water losses was observed under drier conditions. This study emphasizes the need to assess simultaneously multiple factors for understanding regulatory mechanisms of grazing effects on hydrological processes. From a sustainable management point of view, we suggest that increasing the number of water sources, and thus spreading the sheep in a paddock, can enhance the stocking rate while maintaining soil water storage. |
| format | Artículo |
| id | INTA2930 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA29302018-07-31T15:12:41Z Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems Pereyra, Daniel A. Bucci, Sandra Janet Arias, Nadia Soledad Ciano, Nicolas Francisco Cristiano, Piedad María Goldstein, Guillermo Hernan Scholz, Fabian Gustavo Pastoreo Evapotranspiración Agua del Suelo Ecosistema Zona Arida Grazing Evapotranspiration Soil Water Ecosystems Arid Zones Grazing is the predominant land use practice in arid environments; however, there are relatively few studies of grazing effects on ecosystem functioning. We assessed the impact of grazing on soil moisture, evapotranspiration (ET), canopy conductance (Gc), and root water uptake in the Patagonian steppe. Studies were done in 3 sites along a gradient of grazing intensity. High grazing intensity increased the soil water storage by 24% and decreased the amount of water extracted from deep layers compared to the low grazing intensity. Grazing affected ET and its partitioning into transpiration (T) and evaporation. High shrub cover and Gc increased ET and T or ET partitioning in the heavily grazed site. Annual ET increased from 78% to 92% of the annual precipitation from the lowest to the highest grazing intensity, respectively. Total T was 21% higher in the highest intensity site compared to the lowest intensity site. Changes in Gc suggest that grazing modified the canopy architecture, and thus the response of vegetation to environmental factors. At the beginning of the growing season when moisture was high, Gc exhibited the highest value in the heavily grazed site, but a strong regulation of water losses was observed under drier conditions. This study emphasizes the need to assess simultaneously multiple factors for understanding regulatory mechanisms of grazing effects on hydrological processes. From a sustainable management point of view, we suggest that increasing the number of water sources, and thus spreading the sheep in a paddock, can enhance the stocking rate while maintaining soil water storage. EEA Chubut Fil: Pereyra, Daniel A. Universidad Nacional de la Patagonia San Juan Bosco. Grupo de Estudios Biofísicos y Eco‐fisiológicos (GEBEF); Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina Fil: Bucci, Sandra Janet. Universidad Nacional de la Patagonia San Juan Bosco. Grupo de Estudios Biofísicos y Eco‐fisiológicos (GEBEF); Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina Fil: Arias, Nadia Soledad. Universidad Nacional de la Patagonia San Juan Bosco. Grupo de Estudios Biofísicos y Eco‐fisiológicos (GEBEF); Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina Fil: Ciano, Nicolas Francisco. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Chubut; Argentina Fil: Cristiano, Piedad María. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología Funcional; Argentina Fil: Goldstein, Guillermo Hernan. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Ecología Funcional; Argentina. University Of Miami. Department of Biology; Estados Unidos. Fil: Scholz, Fabian Gustavo. Universidad Nacional de la Patagonia San Juan Bosco. Grupo de Estudios Biofísicos y Eco‐fisiológicos (GEBEF); Argentina. Universidad Nacional de la Patagonia "San Juan Bosco". Instituto de Biociencias de la Patagonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biociencias de la Patagonia; Argentina 2018-07-31T15:11:06Z 2018-07-31T15:11:06Z 2017-09 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://onlinelibrary.wiley.com/doi/abs/10.1002/eco.1850 http://hdl.handle.net/20.500.12123/2930 1936-0584 1936-0592 https://doi.org/10.1002/eco.1850 eng info:eu-repo/semantics/restrictedAccess application/pdf Ecohydrology 10 (6) : e1850 (September 2017) |
| spellingShingle | Pastoreo Evapotranspiración Agua del Suelo Ecosistema Zona Arida Grazing Evapotranspiration Soil Water Ecosystems Arid Zones Pereyra, Daniel A. Bucci, Sandra Janet Arias, Nadia Soledad Ciano, Nicolas Francisco Cristiano, Piedad María Goldstein, Guillermo Hernan Scholz, Fabian Gustavo Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| title | Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| title_full | Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| title_fullStr | Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| title_full_unstemmed | Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| title_short | Grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| title_sort | grazing increases evapotranspiration without the cost of lowering soil water storages in arid ecosystems |
| topic | Pastoreo Evapotranspiración Agua del Suelo Ecosistema Zona Arida Grazing Evapotranspiration Soil Water Ecosystems Arid Zones |
| url | https://onlinelibrary.wiley.com/doi/abs/10.1002/eco.1850 http://hdl.handle.net/20.500.12123/2930 https://doi.org/10.1002/eco.1850 |
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