Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina
Question: What effects do low-density afforestation with Pinus elliottii have on the site conditions and plant diversity of the mountains of central Argentina? Location: Sierra de Comechingones, central Argentina. Methods: We studied the species richness and diversity and the physical and chemical...
| Autores principales: | , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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2018
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/3208 https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12385 https://doi.org/10.1111/avsc.12385 |
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| author | Fiandino, Santiago Ignacio Plevich, Jose Omar Tarico, Juan Carlos Nuñez, César Rusch, Veronica Elena Gyenge, Javier |
| author_browse | Fiandino, Santiago Ignacio Gyenge, Javier Nuñez, César Plevich, Jose Omar Rusch, Veronica Elena Tarico, Juan Carlos |
| author_facet | Fiandino, Santiago Ignacio Plevich, Jose Omar Tarico, Juan Carlos Nuñez, César Rusch, Veronica Elena Gyenge, Javier |
| author_sort | Fiandino, Santiago Ignacio |
| collection | INTA Digital |
| description | Question: What effects do low-density afforestation with Pinus elliottii have on the site conditions and plant diversity of the mountains of central Argentina?
Location: Sierra de Comechingones, central Argentina.
Methods: We studied the species richness and diversity and the physical and chemical properties of soils, in both the non-afforested steppe (US) and the understorey of P. elliottii silvopastoral systems (SPS). Measurements were performed on three plots located in US and 18 experimental plots located in SPS, which differ in tree density (150, 250 and 450 trees/ha), pruning (with/without) and position (below – UC –, or outside – BC –, the vertical projection of the tree crown). In each plot, we measured soil variables organic matter (OM), pH, electrical conductivity (EC), moisture content (RH) and relative proportion of coarse fragments; as well as photosynthetically active radiation that reached the ground surface (PARi). At the same time, a floristic survey was performed, consisting of 117 sampling plots distributed equally between treatments. Richness, diversity and evenness indices were calculated for each treatment. Then, we carried out a PCA in order to identify the differences in life forms and environmental variables across the treatments.
Results: PARi and pH were statistically significantly higher in US, while EC and RH were statistically significantly higher in SPS. Diversity indices did not differ significantly among the non-afforested steppe (US) and the patches between crowns (BC), but were significantly higher in both these treatments than below the crown (UC). The higher richness in some of the life forms and light availability clearly separated US from UC in the PCA. All the species of interest (endemic, N-fixing, medicinal, fodder) were found in the SPS.
Conclusions: Our study indicates that the changes in site variables produced by low-density afforestation generate niches for some species and, simultaneously, constitute a barrier to others. However, the fact that diversity indices and the presence of the species of interest showed no differences among the between-crowns patches and the non-afforested steppe, highlights the complex environment–vegetation relationships that take place in this kind of system. |
| format | info:ar-repo/semantics/artículo |
| id | INTA3208 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA32082018-08-28T13:24:43Z Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina Fiandino, Santiago Ignacio Plevich, Jose Omar Tarico, Juan Carlos Nuñez, César Rusch, Veronica Elena Gyenge, Javier Pinus Elliottii Forestación Recursos Forestales Forestation Forest Resources Environmental Factors Afforestation Factores Ambientales Aforestación Argentina Question: What effects do low-density afforestation with Pinus elliottii have on the site conditions and plant diversity of the mountains of central Argentina? Location: Sierra de Comechingones, central Argentina. Methods: We studied the species richness and diversity and the physical and chemical properties of soils, in both the non-afforested steppe (US) and the understorey of P. elliottii silvopastoral systems (SPS). Measurements were performed on three plots located in US and 18 experimental plots located in SPS, which differ in tree density (150, 250 and 450 trees/ha), pruning (with/without) and position (below – UC –, or outside – BC –, the vertical projection of the tree crown). In each plot, we measured soil variables organic matter (OM), pH, electrical conductivity (EC), moisture content (RH) and relative proportion of coarse fragments; as well as photosynthetically active radiation that reached the ground surface (PARi). At the same time, a floristic survey was performed, consisting of 117 sampling plots distributed equally between treatments. Richness, diversity and evenness indices were calculated for each treatment. Then, we carried out a PCA in order to identify the differences in life forms and environmental variables across the treatments. Results: PARi and pH were statistically significantly higher in US, while EC and RH were statistically significantly higher in SPS. Diversity indices did not differ significantly among the non-afforested steppe (US) and the patches between crowns (BC), but were significantly higher in both these treatments than below the crown (UC). The higher richness in some of the life forms and light availability clearly separated US from UC in the PCA. All the species of interest (endemic, N-fixing, medicinal, fodder) were found in the SPS. Conclusions: Our study indicates that the changes in site variables produced by low-density afforestation generate niches for some species and, simultaneously, constitute a barrier to others. However, the fact that diversity indices and the presence of the species of interest showed no differences among the between-crowns patches and the non-afforested steppe, highlights the complex environment–vegetation relationships that take place in this kind of system. Estación Experimental Agropecuaria Bariloche Fil: Fiandino, Santiago Ignacio. Universidad Nacional de Río Cuarto, Facultad de Agronomía y Veterinaria, Departamento de Producción Vegetal; Argentina Fil: Plevich, José Omar. Universidad Nacional de Río Cuarto, Facultad de Agronomía y Veterinaria, Departamento de Producción Vegetal; Argentina Fil: Tarico, Juan Carlos. Universidad Nacional de Río Cuarto, Facultad de Agronomía y Veterinaria, Departamento de Producción Vegetal; Argentina Fil: Nuñez, Cesar. Universidad Nacional de Río Cuarto, Facultad de Agronomía y Veterinaria, Departamento de Ecología Agraria; Argentina Fil: Rusch, Verónica Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área Forestal. Grupo de Ecología Forestal; Argentina Fil: Gyenge, Javier Enrique. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Balcarce, Agencia de Extensión Rural Tandil; Argentina 2018-08-28T13:03:12Z 2018-08-28T13:03:12Z 2018-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/3208 https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12385 1402-2001 1654-109X https://doi.org/10.1111/avsc.12385 eng info:eu-repo/semantics/restrictedAccess application/pdf Applied Vegetation Science 21 (3) : 442-450 (2018) |
| spellingShingle | Pinus Elliottii Forestación Recursos Forestales Forestation Forest Resources Environmental Factors Afforestation Factores Ambientales Aforestación Argentina Fiandino, Santiago Ignacio Plevich, Jose Omar Tarico, Juan Carlos Nuñez, César Rusch, Veronica Elena Gyenge, Javier Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina |
| title | Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina |
| title_full | Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina |
| title_fullStr | Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina |
| title_full_unstemmed | Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina |
| title_short | Effects of low-density Pinus elliottii (Slash pine) afforestation on environmental conditions and native plant diversity, in the mountains of central Argentina |
| title_sort | effects of low density pinus elliottii slash pine afforestation on environmental conditions and native plant diversity in the mountains of central argentina |
| topic | Pinus Elliottii Forestación Recursos Forestales Forestation Forest Resources Environmental Factors Afforestation Factores Ambientales Aforestación Argentina |
| url | http://hdl.handle.net/20.500.12123/3208 https://onlinelibrary.wiley.com/doi/abs/10.1111/avsc.12385 https://doi.org/10.1111/avsc.12385 |
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