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	Provedor de dados Ecología austral (2) Acta Botanica (1) Autor Collantes,Marta (3) Bava,José (1) Escudero,Viviana (1) Goldmann,Valeria (1) Kalesnik,Fábio (1) La Manna,Ludmila (1) Marbán,Liliana (1) Mendoza,Rodolfo E (1) Pagani,Eduardo (1) Rajchenberg,Mario (1) Rivas,Juan (1) Sirolli,Horacio (1) Mais... Palavra-chave Chinese privet (Ligustrum sinense) (1) Colonización de raíz (1) Esporas (1) Forest decline (1) Invasive species (1) Mal del ciprés (1) Micorrizas arbusculares (1) Natural regeneration (1) Pastizales (1) Pastoreo (1) Planta hospedante (1) Post-abandonment regeneration (1) Propiedades del suelo (1) Riparian forest (1) Seedling emergence (1) Site effect (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2013 (1) 2008 (1) 2002 (1) País Argentina (2) Brazil (1) Idioma Inglês (2) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Poblaciones de hongos micorrízicos arbusculares en relación con las propiedades del suelo y de la planta hospedante en pastizales de Tierra del Fuego Ecología austral Mendoza,Rodolfo E; Goldmann,Valeria; Rivas,Juan; Escudero,Viviana; Pagani,Eduardo; Collantes,Marta; Marbán,Liliana. El sobrepastoreo ovino en pastizales de suelos ácidos de Tierra del Fuego ha determinado una disminución de la cobertura de gramíneas de interés forrajero y un aumento de la cobertura de un arbusto postrado poco apetecible (murtilla, Empetrum rubrum). Se seleccionaron suelos sometidos a distinta modalidad de pastoreo que tenían características y vegetación particulares. Se midió la cantidad total y la diversidad de esporas de hongos micorrízicos arbusculares en los cuatro suelos y en la rizósfera de tres de las gramíneas más frecuentes (Festuca gracillima, Deschampsia flexuosa y Poa rigidifolia) en los pastizales de la estepa fueguina. En el suelo rizosférico se determinó la cantidad y la diversidad de esporas de hongos micorrízicos arbusculares, y en las... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pastizales; Micorrizas arbusculares; Esporas; Colonización de raíz; Planta hospedante; Propiedades del suelo; Pastoreo. Ano: 2002 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2002000200004 Seed bank composition in a secondary forest in the Lower Delta of the Paraná River (Argentina) Acta Botanica Kalesnik,Fábio; Sirolli,Horacio; Collantes,Marta. The native forests once occupying the coastal levees of the Lower Delta islands of the Paraná River (in Argentina) have been replaced by commercial forests. Many of those forests have been abandoned, resulting in secondary forest formation that is subject to numerous invasive exotic species. A priori observations suggest that successional trends do not lead to recovery of the original forest. The aim of the present study was to analyze the role of invasive exotic species in these environments and the likelihood of recovery of the original forest cover. Therefore, we examined the composition of the seed bank and of the standing vegetation, as well as the population structure of tree species. Secondary forests are described as being in an intermediate... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chinese privet (Ligustrum sinense); Invasive species; Post-abandonment regeneration; Riparian forest; Seedling emergence. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100006 Seedling recruitment of Austrocedrus chilensis in relation to cattle use, microsite environment and forest disease Ecología austral La Manna,Ludmila; Collantes,Marta; Bava,José; Rajchenberg,Mario. The forests of Austrocedrus chilensis in the Patagonian Andes suffer a disease known as "mal del ciprés". The purpose of this work was to identify the relationship between A. chilensis seedling recruitment and disturbances (i.e., disease and cattle grazing), and to identify associations between seedling recruitment and microsite characteristics related to the disturbances. Eighteen sites with "mal del ciprés" were selected for study. In each site, symptomatic and asymptomatic plots were established and characterized. Five control sites, where the disease was totally absent, were also included. Cattle use and disease were negatively associated with A. chilensis natural regeneration. Both disturbances seemed to act synergically. In control sites the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest decline; Mal del ciprés; Natural regeneration; Site effect. Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2008000100003 Registros recuperados: 3 Primeira ... 1 ... Última

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