Local and intermediated - intensity soil disturbances increase the colonization and expansion dynamics of an invasive plant in southern patagonian rangelands
Disturbances are important drivers in natural ecosystems, affecting the vegetation structure and functioning. Invasions of exotic plant species are often associated to disturbances in a complex manner, because they depend on the type, intensity, spatial and temporal arrangement of disturbances, and...
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| Otros Autores: | , |
| Formato: | Artículo |
| Lenguaje: | Español |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2014rauber.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 100 | 1 | |9 67636 |a Rauber, Ruth B. | |
| 245 | 0 | 0 | |a Local and intermediated - intensity soil disturbances increase the colonization and expansion dynamics of an invasive plant in southern patagonian rangelands |
| 520 | |a Disturbances are important drivers in natural ecosystems, affecting the vegetation structure and functioning. Invasions of exotic plant species are often associated to disturbances in a complex manner, because they depend on the type, intensity, spatial and temporal arrangement of disturbances, and the particular abiotic and biotic context. Field studies that evaluate the dynamics of plant invasions under different disturbance regimes have a great importance for the understanding of the disturbance effects on invasion spread. In this work we evaluated, through a field manipulative experiment, the early colonization and expansion dynamics of an aggressive invader of grasslands, Hieracium pilosella L., under two disturbance types. We used a split-plot experiment by crossing three levels for a local, sporadic, of increasing intensity disturbance [i.e., 1-undisturbed, 2-vegetation mowing, and 3-ploughing], within two levels for an extensive and chronic disturbance [i.e., grazed and ungrazed]. In the range of intensities of disturbance evaluated, the intermediate intensity [i.e., mowing] accelerated the colonization when it is grazed and the expansion of H. pilosella in ungrazed condition. In contrast, lower and higher intensity disturbances, such as ungrazed and ploughing treatments decelerated both invasion processes. Changes in resource availability, interspecific competition and particular characteristics of the invader, i.e., high light requirements, prostrate growth and the presence of stolons, could explain these early invasion patterns. | ||
| 653 | 0 | |a AGGRESSION | |
| 653 | 0 | |a COLONIZATION | |
| 653 | 0 | |a ENVIRONMENTAL DISTURBANCE | |
| 653 | 0 | |a EXOTIC SPECIES | |
| 653 | 0 | |a HABITAT MANAGEMENT | |
| 653 | 0 | |a HIERACIUM PILOSELLA | |
| 653 | 0 | |a INVASIVE SPECIES | |
| 653 | 0 | |a PATAGONIA | |
| 653 | 0 | |a PLANT COMMUNITY | |
| 653 | 0 | |a PLANT INVASION | |
| 653 | 0 | |a PLANT SPREAD | |
| 653 | 0 | |a RANGELAND | |
| 653 | 0 | |a SHEEP GRAZING | |
| 653 | 0 | |a SOIL PROPERTY | |
| 700 | 1 | |9 20940 |a Cipriotti, Pablo Ariel | |
| 700 | 1 | |a Collantes, Marta Beatriz |9 25260 | |
| 773 | |t Community Ecology |g vol.15, no.1 (2014), p.87-93 | ||
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| 900 | |a ^tLocal and intermediated-intensity soil disturbances increase the colonization and expansion dynamics of an invasive plant in southern patagonian rangelands | ||
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| 900 | |a Rauber, R.B. CONICET, Laboratorio de Ecología de Pastizales, Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina | ||
| 900 | |a Rauber, R.B. Instituto Nacional de Tecnología Agropecuaria [INTA], Villa Mercedes, San Luis, Argentina | ||
| 900 | |a Cipriotti, P.A. CONICET, Laboratorio de Ecología de Pastizales, Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina | ||
| 900 | |a Cipriotti, P.A. Departamento de Métodos Cuantitativos y Sistemas de Información, Universidad de Buenos Aires, CONICET, IFEVA, Buenos Aires, Argentina | ||
| 900 | |a Collantes, M.B. CONICET, Laboratorio de Ecología de Pastizales, Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina | ||
| 900 | |a ^tCommunity Ecology^cCommunity Ecol. | ||
| 900 | |a eng | ||
| 900 | |a 87 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 15, no. 1 | ||
| 900 | |a 93 | ||
| 900 | |a AGGRESSION | ||
| 900 | |a COLONIZATION | ||
| 900 | |a ENVIRONMENTAL DISTURBANCE | ||
| 900 | |a EXOTIC SPECIES | ||
| 900 | |a HABITAT MANAGEMENT | ||
| 900 | |a HIERACIUM PILOSELLA | ||
| 900 | |a INVASIVE SPECIES | ||
| 900 | |a PATAGONIA | ||
| 900 | |a PLANT COMMUNITY | ||
| 900 | |a PLANT INVASION | ||
| 900 | |a PLANT SPREAD | ||
| 900 | |a RANGELAND | ||
| 900 | |a SHEEP GRAZING | ||
| 900 | |a SOIL PROPERTY | ||
| 900 | |a Disturbances are important drivers in natural ecosystems, affecting the vegetation structure and functioning. Invasions of exotic plant species are often associated to disturbances in a complex manner, because they depend on the type, intensity, spatial and temporal arrangement of disturbances, and the particular abiotic and biotic context. Field studies that evaluate the dynamics of plant invasions under different disturbance regimes have a great importance for the understanding of the disturbance effects on invasion spread. In this work we evaluated, through a field manipulative experiment, the early colonization and expansion dynamics of an aggressive invader of grasslands, Hieracium pilosella L., under two disturbance types. We used a split-plot experiment by crossing three levels for a local, sporadic, of increasing intensity disturbance [i.e., 1-undisturbed, 2-vegetation mowing, and 3-ploughing], within two levels for an extensive and chronic disturbance [i.e., grazed and ungrazed]. In the range of intensities of disturbance evaluated, the intermediate intensity [i.e., mowing] accelerated the colonization when it is grazed and the expansion of H. pilosella in ungrazed condition. In contrast, lower and higher intensity disturbances, such as ungrazed and ploughing treatments decelerated both invasion processes. Changes in resource availability, interspecific competition and particular characteristics of the invader, i.e., high light requirements, prostrate growth and the presence of stolons, could explain these early invasion patterns. | ||
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