Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows
Wet meadows are seasonally saturated wetlands that can develop in arid and semi-arid areas. In the semi-arid region of North Patagonia, Argentina wet meadows are islands of high net primary productivity surrounded by low productivity steppe vegetation. Because of this, Patagonian wet meadows have be...
| Autores principales: | , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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Elsevier
2018
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| Materias: | |
| Acceso en línea: | https://www.sciencedirect.com/science/article/pii/S0140196314000998 http://hdl.handle.net/20.500.12123/3850 https://doi.org/10.1016/j.jaridenv.2014.04.012 |
| _version_ | 1855035214941650944 |
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| author | Enriquez, Andrea Soledad Chimner, Rodney Allen Cremona, Maria Victoria |
| author_browse | Chimner, Rodney Allen Cremona, Maria Victoria Enriquez, Andrea Soledad |
| author_facet | Enriquez, Andrea Soledad Chimner, Rodney Allen Cremona, Maria Victoria |
| author_sort | Enriquez, Andrea Soledad |
| collection | INTA Digital |
| description | Wet meadows are seasonally saturated wetlands that can develop in arid and semi-arid areas. In the semi-arid region of North Patagonia, Argentina wet meadows are islands of high net primary productivity surrounded by low productivity steppe vegetation. Because of this, Patagonian wet meadows have been heavily grazed by livestock for more than a century. It has been shown that overgrazed wet meadows have lower soil carbon, however, little is known about how overgrazing impacts N dynamics. To this end, we measured ammonium (NH4+), nitrate (NO3−), and total nitrogen (Nt) in paired wet meadows that varied in long-term grazing intensity (heavy vs. light). Results indicate that heavily grazed sites had on average 43% less Nt and 57% less NH4+ than lightly grazed sites. Soil NH4+ concentrations were always significantly greater than NO3− concentrations, being the later often below detection levels. In addition, NH4+ concentrations were correlated with soil moisture in lightly grazed sites, but not in heavily grazed sites. These findings indicate that implementation of better management practices are currently needed to promote more sustainable grazing in semi-arid wet meadows of North Patagonia |
| format | info:ar-repo/semantics/artículo |
| id | INTA3850 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA38502018-11-09T14:41:08Z Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows Enriquez, Andrea Soledad Chimner, Rodney Allen Cremona, Maria Victoria Prados de Siega Pastoreo Suelo Nitrógeno Amoníaco Contenido de Agua en el Suelo Sobrepastoreo Meadows Grazing Soil Nitrogen Ammonia Soil Water Content Overgrazing Mallines Humedales Región Patagónica Wet meadows are seasonally saturated wetlands that can develop in arid and semi-arid areas. In the semi-arid region of North Patagonia, Argentina wet meadows are islands of high net primary productivity surrounded by low productivity steppe vegetation. Because of this, Patagonian wet meadows have been heavily grazed by livestock for more than a century. It has been shown that overgrazed wet meadows have lower soil carbon, however, little is known about how overgrazing impacts N dynamics. To this end, we measured ammonium (NH4+), nitrate (NO3−), and total nitrogen (Nt) in paired wet meadows that varied in long-term grazing intensity (heavy vs. light). Results indicate that heavily grazed sites had on average 43% less Nt and 57% less NH4+ than lightly grazed sites. Soil NH4+ concentrations were always significantly greater than NO3− concentrations, being the later often below detection levels. In addition, NH4+ concentrations were correlated with soil moisture in lightly grazed sites, but not in heavily grazed sites. These findings indicate that implementation of better management practices are currently needed to promote more sustainable grazing in semi-arid wet meadows of North Patagonia EEA Bariloche Fil: Enriquez, Andrea Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Chimner, Rodney Allen. Michigan Technological University. School of Forest Resources and Environmental Science; Estados Unidos Fil: Cremona, Maria Victoria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina 2018-11-09T14:38:06Z 2018-11-09T14:38:06Z 2014-10 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0140196314000998 http://hdl.handle.net/20.500.12123/3850 0140-1963 1095-922X https://doi.org/10.1016/j.jaridenv.2014.04.012 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Journal of Arid Environments 109 : 1-5 (October 2014) |
| spellingShingle | Prados de Siega Pastoreo Suelo Nitrógeno Amoníaco Contenido de Agua en el Suelo Sobrepastoreo Meadows Grazing Soil Nitrogen Ammonia Soil Water Content Overgrazing Mallines Humedales Región Patagónica Enriquez, Andrea Soledad Chimner, Rodney Allen Cremona, Maria Victoria Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows |
| title | Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows |
| title_full | Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows |
| title_fullStr | Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows |
| title_full_unstemmed | Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows |
| title_short | Long-term grazing negatively affects nitrogen dynamics in Northern Patagonian wet meadows |
| title_sort | long term grazing negatively affects nitrogen dynamics in northern patagonian wet meadows |
| topic | Prados de Siega Pastoreo Suelo Nitrógeno Amoníaco Contenido de Agua en el Suelo Sobrepastoreo Meadows Grazing Soil Nitrogen Ammonia Soil Water Content Overgrazing Mallines Humedales Región Patagónica |
| url | https://www.sciencedirect.com/science/article/pii/S0140196314000998 http://hdl.handle.net/20.500.12123/3850 https://doi.org/10.1016/j.jaridenv.2014.04.012 |
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