How does grazing affect soil water availability in the Patagonian steppe?
In the Patagonian steppe, grazing may or may not reduce soil water availability: it may increase evaporative losses, because it reduces plant cover, but may decrease transpiration losses because it decreases plant biomass. Therefore, grazing could reduce soil water availability in the superficial la...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Elsevier
2022
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/12021 https://www.sciencedirect.com/science/article/pii/S0140196322000957 https://doi.org/10.1016/j.jaridenv.2022.104800 |
| _version_ | 1855484893366059008 |
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| author | Golluscio, Rodolfo Ángel Garcia Martinez, Guillermo Carlos Cavagnaro, Fernando Pablo |
| author_browse | Cavagnaro, Fernando Pablo Garcia Martinez, Guillermo Carlos Golluscio, Rodolfo Ángel |
| author_facet | Golluscio, Rodolfo Ángel Garcia Martinez, Guillermo Carlos Cavagnaro, Fernando Pablo |
| author_sort | Golluscio, Rodolfo Ángel |
| collection | INTA Digital |
| description | In the Patagonian steppe, grazing may or may not reduce soil water availability: it may increase evaporative losses, because it reduces plant cover, but may decrease transpiration losses because it decreases plant biomass. Therefore, grazing could reduce soil water availability in the superficial layer, mostly affected by evaporation, but could increase it in the subsurface layers, mostly affected by transpiration. Our hypothesis is that such effects would be most evident in the bare soil spaces, with higher evaporative losses and lower root density than vegetated microsites. Therefore, we analyzed the proportion of four microsites (shrubs, bare soil, preferred- and unpreferred grasses), and their soil water availability at 0–5 and 5–15 cm depth in four sampling areas, each one with an ungrazed, a moderately- and an intensely-grazed site. Our results supported the initial hypothesis: bare soil microsites had the lowest surface, but the highest subsurface water availability. However, grazing did not cause any change in the mean soil water availability (net effect) because it did not affect soil water availability in any microsite and depth (direct effects), and only caused a replacement of preferred-by unpreferred grasses (indirect effects), two groups that induced small differences in water availability. |
| format | Artículo |
| id | INTA12021 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA120212022-06-06T11:01:38Z How does grazing affect soil water availability in the Patagonian steppe? Golluscio, Rodolfo Ángel Garcia Martinez, Guillermo Carlos Cavagnaro, Fernando Pablo Desertificación Pastoreo Evaporación Transpiración Disponibilidad del Agua Características del Sitio Estepas Desertification Grazing Evaporation Transpiration Water Availability Site Factors Steppes Región Patagónica In the Patagonian steppe, grazing may or may not reduce soil water availability: it may increase evaporative losses, because it reduces plant cover, but may decrease transpiration losses because it decreases plant biomass. Therefore, grazing could reduce soil water availability in the superficial layer, mostly affected by evaporation, but could increase it in the subsurface layers, mostly affected by transpiration. Our hypothesis is that such effects would be most evident in the bare soil spaces, with higher evaporative losses and lower root density than vegetated microsites. Therefore, we analyzed the proportion of four microsites (shrubs, bare soil, preferred- and unpreferred grasses), and their soil water availability at 0–5 and 5–15 cm depth in four sampling areas, each one with an ungrazed, a moderately- and an intensely-grazed site. Our results supported the initial hypothesis: bare soil microsites had the lowest surface, but the highest subsurface water availability. However, grazing did not cause any change in the mean soil water availability (net effect) because it did not affect soil water availability in any microsite and depth (direct effects), and only caused a replacement of preferred-by unpreferred grasses (indirect effects), two groups that induced small differences in water availability. EEA Esquel Fil: Golluscio, Rodolfo Ángel. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Forrajicultura; Argentina Fil: Golluscio, Rodolfo Ángel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Golluscio, Rodolfo Ángel. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a La Agricultura (IFEVA); Argentina Fil: García Martínez, Guillermo Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agroforestal Esquel; Argentina Fil: Cavagnaro, Fernando Pablo. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Forrajicultura; Argentina 2022-06-06T10:56:14Z 2022-06-06T10:56:14Z 2022-06-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/12021 https://www.sciencedirect.com/science/article/pii/S0140196322000957 0140-1963 https://doi.org/10.1016/j.jaridenv.2022.104800 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Journal of Arid Environments 205 : 104800. (October 2022) |
| spellingShingle | Desertificación Pastoreo Evaporación Transpiración Disponibilidad del Agua Características del Sitio Estepas Desertification Grazing Evaporation Transpiration Water Availability Site Factors Steppes Región Patagónica Golluscio, Rodolfo Ángel Garcia Martinez, Guillermo Carlos Cavagnaro, Fernando Pablo How does grazing affect soil water availability in the Patagonian steppe? |
| title | How does grazing affect soil water availability in the Patagonian steppe? |
| title_full | How does grazing affect soil water availability in the Patagonian steppe? |
| title_fullStr | How does grazing affect soil water availability in the Patagonian steppe? |
| title_full_unstemmed | How does grazing affect soil water availability in the Patagonian steppe? |
| title_short | How does grazing affect soil water availability in the Patagonian steppe? |
| title_sort | how does grazing affect soil water availability in the patagonian steppe |
| topic | Desertificación Pastoreo Evaporación Transpiración Disponibilidad del Agua Características del Sitio Estepas Desertification Grazing Evaporation Transpiration Water Availability Site Factors Steppes Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/12021 https://www.sciencedirect.com/science/article/pii/S0140196322000957 https://doi.org/10.1016/j.jaridenv.2022.104800 |
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