Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina
Questions: What is the effect of a range of controlled stocking rates on plant species richness and diversity? Location: Subtropical grasslands of Corrientes, Argentina, South America. Methods: We studied the effect of three controlled stocking rates (0.6, 0.8 and 1.0 cow equivalents·ha−1) on spec...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Wiley
2019
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| Acceso en línea: | https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12229 http://hdl.handle.net/20.500.12123/4706 https://doi.org/10.1111/avsc.12229 |
| _version_ | 1855483481838059520 |
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| author | Pizzio, Rafael Mario Herrero Jáugueri, Cristina Pizzio, Mariano Oesterheld, Martin |
| author_browse | Herrero Jáugueri, Cristina Oesterheld, Martin Pizzio, Mariano Pizzio, Rafael Mario |
| author_facet | Pizzio, Rafael Mario Herrero Jáugueri, Cristina Pizzio, Mariano Oesterheld, Martin |
| author_sort | Pizzio, Rafael Mario |
| collection | INTA Digital |
| description | Questions: What is the effect of a range of controlled stocking rates on plant species richness and diversity?
Location: Subtropical grasslands of Corrientes, Argentina, South America.
Methods: We studied the effect of three controlled stocking rates (0.6, 0.8 and 1.0 cow equivalents·ha−1) on species diversity and composition during 8 yr. We calculated species diversity using the antilog of the Shannon‐Wiener index, and considered its two components, richness and evenness. We also assessed the proportion of prostrate and erect species. Species abundance was based on biomass estimations.
Results: Species diversity under high stocking rates gradually decreased throughout the experiment and became nearly 50% lower than under low stocking rate. This decline was largely accounted for by changes of evenness because species richness was not affected by stocking rates. Species composition clearly diverged among the three treatments over time. Low stocking rate maintained a fairly constant relative cover of erect and prostrate grasses throughout the experiment, whereas intermediate and high stocking rate treatments were gradually and consistently enriched in prostrate grasses and forbs. These effects occurred simultaneously with drastic inter‐annual changes likely driven by annual precipitation.
Conclusions: The range of stocking rates had no effect on species richness, but reduced diversity through the effect on evenness. High stocking rate progressively increased the proportion of prostrate species in the biomass. |
| format | Artículo |
| id | INTA4706 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA47062019-03-22T13:13:31Z Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina Pizzio, Rafael Mario Herrero Jáugueri, Cristina Pizzio, Mariano Oesterheld, Martin Praderas Biodiversidad Carga Ganadera Intensidad de Pastoreo Biomasa Grasslands Biodiversity Stocking Density Grazing Intensity Biomass Carga animal Questions: What is the effect of a range of controlled stocking rates on plant species richness and diversity? Location: Subtropical grasslands of Corrientes, Argentina, South America. Methods: We studied the effect of three controlled stocking rates (0.6, 0.8 and 1.0 cow equivalents·ha−1) on species diversity and composition during 8 yr. We calculated species diversity using the antilog of the Shannon‐Wiener index, and considered its two components, richness and evenness. We also assessed the proportion of prostrate and erect species. Species abundance was based on biomass estimations. Results: Species diversity under high stocking rates gradually decreased throughout the experiment and became nearly 50% lower than under low stocking rate. This decline was largely accounted for by changes of evenness because species richness was not affected by stocking rates. Species composition clearly diverged among the three treatments over time. Low stocking rate maintained a fairly constant relative cover of erect and prostrate grasses throughout the experiment, whereas intermediate and high stocking rate treatments were gradually and consistently enriched in prostrate grasses and forbs. These effects occurred simultaneously with drastic inter‐annual changes likely driven by annual precipitation. Conclusions: The range of stocking rates had no effect on species richness, but reduced diversity through the effect on evenness. High stocking rate progressively increased the proportion of prostrate species in the biomass. EEA Mercedes Fil: Pizzio, Rafael Mario. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; Argentina Fil: Herrero Jáugueri, Cristina. Universidad Complutense de Madrid. Facultad de Biología. Departamento de Ecología; España Fil: Pizzio, Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Oesterheld, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina 2019-03-22T13:10:48Z 2019-03-22T13:10:48Z 2016-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12229 http://hdl.handle.net/20.500.12123/4706 1402-2001 1654-109X https://doi.org/10.1111/avsc.12229 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley Applied Vegetation Science 19 (3) : 454-461 (July 2016) |
| spellingShingle | Praderas Biodiversidad Carga Ganadera Intensidad de Pastoreo Biomasa Grasslands Biodiversity Stocking Density Grazing Intensity Biomass Carga animal Pizzio, Rafael Mario Herrero Jáugueri, Cristina Pizzio, Mariano Oesterheld, Martin Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina |
| title | Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina |
| title_full | Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina |
| title_fullStr | Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina |
| title_full_unstemmed | Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina |
| title_short | Impact of stocking rate on species diversity and composition of a subtropical grassland in Argentina |
| title_sort | impact of stocking rate on species diversity and composition of a subtropical grassland in argentina |
| topic | Praderas Biodiversidad Carga Ganadera Intensidad de Pastoreo Biomasa Grasslands Biodiversity Stocking Density Grazing Intensity Biomass Carga animal |
| url | https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12229 http://hdl.handle.net/20.500.12123/4706 https://doi.org/10.1111/avsc.12229 |
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