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Regional suitability assessment for the Mouseear Hawkweed (Hieracium pilosella) : invasion in Patagonian rangelands

Colaborador(es): Rauber, Ruth B. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (EEA Mercedes). Villa Mercedes, San Luis, Argentina. CONICET. Argentina. Laboratorio de Ecología de Pastizales. Museo Argentino de Ciencias Naturales. Argentina | Cipriotti, Pablo Ariel. Museo Argentino de Ciencias Naturales. Laboratorio de Ecología de Pastizales. Buenos Aires, Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información. Buenos Aires, Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina | Collantes, Marta Beatriz. CONICET. Argentina. Museo Argentino de Ciencias Naturales. Laboratorio de Ecología de Pastizales. Buenos Aires, Argentina | Martini, Juan Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (EEA Mercedes). Villa Mercedes, Argentina | Frers, Enrique J. Instituto Nacional de Tecnología Agropecuaria (INTA). Agencia de Extensión Rural Rio Grande, Tierra del Fuego, Argentina.
ISSN: 1939-747X.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): GRASSLANDS | HAWKWEEDS | NIS | PASTURES | SHEEP GRAZING | SOIL DISTURBANCE | SPATIAL MODELING | SUITABILITY | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR En: Invasive Plant Science and Management Vol.9, no.4 (2016), p.242–251, tbls. grafs., mapasResumen: Several studies have been carried out to evaluate the main rivers behind biological invasions and their ecological consequences. Nevertheless, it is still extremely difficult to acquire a full understanding of the invasion process due to its high level of complexity. The problems that complicate invasion studies are low detection during the early stages of invasion, and the high survey cost of working over large, inaccessible, and rugged areas. The studies that develop efficient tools to reduce costs and time will help to control or mitigate the invaders’ damaging effects. Hieracium pilosella is an aggressive invader of grasslands worldwide. The aim of this work was to conduct a regional assessment for the suitability of H. pilosella invasion in the Fuegian Steppe by combining field surveys, spatial modeling, and geographic information system tools. We recorded the invader cover in 167 sample sites and we determined the relationship between environmental variables and the probability of invasion. This was carried out by the selection of alternative generalized linear models. The best model indicates that disturbance and plant community were the main drivers to predict invasion suitability on a regional scale. Therefore, these two variables were used as main inputs to construct a regional invasion suitability map, which identifies the most critical areas for prevention, control, and further monitoring. This approach corresponds to a tool that permits us to evaluate the suitability of invasion even over large and inaccessible areas. The results especially warn about soil disturbance associated with usual management practices in Fuegian rangelands.
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Several studies have been carried out to evaluate the main rivers behind biological invasions and their ecological consequences. Nevertheless, it is still extremely difficult to acquire a full understanding of the invasion process due to its high level of complexity. The problems that complicate invasion studies are low detection during the early stages of invasion, and the high survey cost of working over large, inaccessible, and rugged areas. The studies that develop efficient tools to reduce costs and time will help to control or mitigate the invaders’ damaging effects. Hieracium pilosella is an aggressive invader of grasslands worldwide. The aim of this work was to conduct a regional assessment for the suitability of H. pilosella invasion in the Fuegian Steppe by combining field surveys, spatial modeling, and geographic information system tools. We recorded the invader cover in 167 sample sites and we determined the relationship between environmental variables and the probability of invasion. This was carried out by the selection of alternative generalized linear models. The best model indicates that disturbance and plant community were the main drivers to predict invasion suitability on a regional scale. Therefore, these two variables were used as main inputs to construct a regional invasion suitability map, which identifies the most critical areas for prevention, control, and further monitoring. This approach corresponds to a tool that permits us to evaluate the suitability of invasion even over large and inaccessible areas. The results especially warn about soil disturbance associated with usual management practices in Fuegian rangelands.

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