Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments
Vegetation states with low suitability for cattle raising (‘woody states’) are widespread in the Chaco region (NW Argentina). We assessed the success of roller-chopper (RR); roller-chopper with seeding of Panicum maximum cv green panic (RS), and roller chopper followed by prescribed fire (RF) in dis...
| Autores principales: | , , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2023
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/14795 https://www.sciencedirect.com/science/article/pii/S092585741200047X https://doi.org/10.1016/j.ecoleng.2012.01.025 |
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| author | Kunst, Carlos Roberto Ledesma, Roxana Ramona Bravo, Sandra Albanesi de Garay, Ada Susana Anriquez, Analía Liliana Van Meer, Howard Godoy, Jose Alberto |
| author_browse | Albanesi de Garay, Ada Susana Anriquez, Analía Liliana Bravo, Sandra Godoy, Jose Alberto Kunst, Carlos Roberto Ledesma, Roxana Ramona Van Meer, Howard |
| author_facet | Kunst, Carlos Roberto Ledesma, Roxana Ramona Bravo, Sandra Albanesi de Garay, Ada Susana Anriquez, Analía Liliana Van Meer, Howard Godoy, Jose Alberto |
| author_sort | Kunst, Carlos Roberto |
| collection | INTA Digital |
| description | Vegetation states with low suitability for cattle raising (‘woody states’) are widespread in the Chaco region (NW Argentina). We assessed the success of roller-chopper (RR); roller-chopper with seeding of Panicum maximum cv green panic (RS), and roller chopper followed by prescribed fire (RF) in disrupting a woody state in two separate experiments, monitored from 1997 to 2002. We evaluated amount and temporal dynamics of woody plant volume, standing herbaceous biomass and livestock accessibility. We also monitored soil moisture at two soil depths, sunlight availability and the dynamics of germination of grass, forbs and woody species. Spatial variation was included as ecological sites, and all treatments were grazed. The longevity for each treatment was estimated by monitoring the woody volume through time. Data were analyzed using variance and regression analysis. MRPP techniques were used to study the effect on species diversity. Results were compared with information in literature to define thresholds and success of restoration. RF showed the lowest mean woody canopy (p > F = 0.0001), the largest mean accessibility (>70%), and longest return interval (>6 years) among treatments. RS showed the largest amount of herbaceous standing biomass (>5000 kg dry matter ha−1, p > F = 0.0001), and a longevity >5 years. Prescribed fire was successful in controlling the increase of woody volume only at lowland and midland ecosites. At upland ecosites in RS and RR, mean woody volume and accessibility were higher than in the other two sites. Plant diversity was significantly affected by ecosite rather than by treatment and time. Soil moisture was influenced by site (p > F = 0.001), while sunlight availability was affected by treatment (p > F = 0.001). Plant germination was affected by treatment and site. The roller chopper is an adequate tool for disrupting woody states in the Chaco and could be successfully combined with prescribed fire. |
| format | info:ar-repo/semantics/artículo |
| id | INTA14795 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA147952023-07-21T11:51:06Z Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments Kunst, Carlos Roberto Ledesma, Roxana Ramona Bravo, Sandra Albanesi de Garay, Ada Susana Anriquez, Analía Liliana Van Meer, Howard Godoy, Jose Alberto Plantas Leñosas Quema Controlada Picadoras Woody Plants Controlled Burning Choppers Región Chaqueña, Argentina Vegetation states with low suitability for cattle raising (‘woody states’) are widespread in the Chaco region (NW Argentina). We assessed the success of roller-chopper (RR); roller-chopper with seeding of Panicum maximum cv green panic (RS), and roller chopper followed by prescribed fire (RF) in disrupting a woody state in two separate experiments, monitored from 1997 to 2002. We evaluated amount and temporal dynamics of woody plant volume, standing herbaceous biomass and livestock accessibility. We also monitored soil moisture at two soil depths, sunlight availability and the dynamics of germination of grass, forbs and woody species. Spatial variation was included as ecological sites, and all treatments were grazed. The longevity for each treatment was estimated by monitoring the woody volume through time. Data were analyzed using variance and regression analysis. MRPP techniques were used to study the effect on species diversity. Results were compared with information in literature to define thresholds and success of restoration. RF showed the lowest mean woody canopy (p > F = 0.0001), the largest mean accessibility (>70%), and longest return interval (>6 years) among treatments. RS showed the largest amount of herbaceous standing biomass (>5000 kg dry matter ha−1, p > F = 0.0001), and a longevity >5 years. Prescribed fire was successful in controlling the increase of woody volume only at lowland and midland ecosites. At upland ecosites in RS and RR, mean woody volume and accessibility were higher than in the other two sites. Plant diversity was significantly affected by ecosite rather than by treatment and time. Soil moisture was influenced by site (p > F = 0.001), while sunlight availability was affected by treatment (p > F = 0.001). Plant germination was affected by treatment and site. The roller chopper is an adequate tool for disrupting woody states in the Chaco and could be successfully combined with prescribed fire. EEA Santiago del Estero Fil: Kunst, Carlos Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Ledesma, Roxana Ramona. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Bravo, Sandra. Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales. Cátedra de Botánica; Argentina Fil: Albanesi de Garay, Ada Susana. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina Fil: Anriquez, Analia Liliana. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina Fil: Van Meer, Howard. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina Fil: Godoy, Jose Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina 2023-07-21T11:34:24Z 2023-07-21T11:34:24Z 2012-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14795 https://www.sciencedirect.com/science/article/pii/S092585741200047X 0925-8574 1872-6992 https://doi.org/10.1016/j.ecoleng.2012.01.025 eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Elsevier Ecological Engineering 42 : 42-53. (May 2012) |
| spellingShingle | Plantas Leñosas Quema Controlada Picadoras Woody Plants Controlled Burning Choppers Región Chaqueña, Argentina Kunst, Carlos Roberto Ledesma, Roxana Ramona Bravo, Sandra Albanesi de Garay, Ada Susana Anriquez, Analía Liliana Van Meer, Howard Godoy, Jose Alberto Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments |
| title | Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments |
| title_full | Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments |
| title_fullStr | Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments |
| title_full_unstemmed | Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments |
| title_short | Disrupting woody steady states in the Chaco region (Argentina): Responses to combined disturbance treatments |
| title_sort | disrupting woody steady states in the chaco region argentina responses to combined disturbance treatments |
| topic | Plantas Leñosas Quema Controlada Picadoras Woody Plants Controlled Burning Choppers Región Chaqueña, Argentina |
| url | http://hdl.handle.net/20.500.12123/14795 https://www.sciencedirect.com/science/article/pii/S092585741200047X https://doi.org/10.1016/j.ecoleng.2012.01.025 |
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