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Registros recuperados: 9
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Landscapes with Araucaria in South America: evidence for a cultural dimension Ecology and Society
Peroni, Nivaldo; Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina; peronin@gmail.com.
Tipo: Peer-Reviewed Reports Palavras-chave: Araucaria forests; Araucaria angustifolia; Araucaria araucana; Cultural identity; Cultural landscape; Traditional diet.
Ano: 2014
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Small mammals and microhabitats in Araucaria forests of Neuquén, Argentina Mastozool. neotrop.
Shepherd,John D; Ditgen,Rebecca S.
Utilizamos métodos de marcado-captura-recaptura para muestrear pequeños mamíferos en un bosque húmedo y un bosque seco de Araucaria araucana-Nothofagus en Neuquén, Argentina. Durante 4 años, en verano y otoño, se realizaron 678 capturas (323 individuos) de 6 especies en un total de 5300 trampa noches. Abrothrix hirta (64% de capturas) se capturó en cada trampeo, pero Oligoryzomys longicaudatus (26%) se capturó solo en otoño. Ambas especies de ratones presentaron menor peso cuando la producción de semillas de Araucaria fue muy baja. O. longicaudatus parece migrar de otros hábitats hacia los bosques de Araucaria para explotar la caída de semillas en otoño. Medimos 9 variables del dosel y 19 variables del sotobosque alrededor de 100 sitios de trampa y...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abrothrix hirta; Araucaria araucana; Oligoryzomys longicaudatus.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832016000200019
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Human use and small mammal communities of Araucaria forests in Neuquén, Argentina Mastozool. neotrop.
Shepherd,John D.; Ditgen,Rebecca S..
Small mammals were sampled in five closed, humid, Araucaria araucana forests that differed in the degree of anthropogenic disturbance in southwestern Neuquén province. Nine species were captured in 3416 trap nights. Abrothrix longipilis and Oligoryzomys longicaudatus made up 88% of all captures. Small mammal relative abundance was 52 times higher where grazing was absent compared to a site with intense grazing pressure. Seed predation, primarily by livestock and feral exotic mammals, varied from 59.7% to 15.1% of marked seeds per day. Small mammal community productivity and composition were correlated with understory structure (Mantel test, r = 0.529, p = 0.04), and with rates of seed predation (r = -0.91, n = 4, p = 0.08). Forests with less complex...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araucaria araucana; Exotic species; Human impact; Seed predation; Small mammals.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832005000200008
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Los Bosques de Araucaria en Chile: Manejo Sostenible, el Costo de la Sostenibilidad y las Restricciones Técnicas a su Manejo. AgEcon
Modrego, Felix; Melo, Oscar; Gilabert, H..
Published by Asociación de Economistas Agrarios de Chile
Tipo: Journal Article Palavras-chave: Araucaria araucana; Matrix model; Forest management.; Farm Management; Production Economics; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/97358
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First records of three species of Oxycraspedus Kuschel (Coleóptera: Belidae) in Argentina and use of a predictive model to compare their potential distribution with the range of their host-plant, Araucaria araucana RChHN
FERRER,M.S.; MARVALDI,A.E.; TOGNELLI,M.F..
The first records of the three known species of Oxycraspedus Kuschel (Belidae: Oxycoryninae) in Argentina are reported, and added to their known distribution in Chile. These weevils are of interest because of their association with the pehuén or monkey puzzle tree, Araucaria araucana, a species of conservation concern. Their distribution data are of value for the protection of biodiversity in natural areas of Patagonia. The potential distribution of Oxycraspedus, as predicted by a model using bioclimatic variables, is coincident as expected, with the geographic range of the araucaria host-plant
Tipo: Journal article Palavras-chave: Oxycoryninae; Araucaria araucana; Bioclimatic variables; Distribution models.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000300006
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Leaf life spans of some conifers of the temperate forests of South America RChHN
LUSK,CHRISTOPHER H..
Interspecific variation in leaf life span has wide-ranging implications for plant species sorting on resource availability gradients, and for ecosystem processes such as nutrient cycling. Very little is known about leaf life spans of evergreen trees in the temperate forests of South America. Leaf life spans were estimated by static demographic methods, and associated leaf traits measured, for four conifers of this region. It was expected that leaf life span variation would correlate negatively with soil fertility of habitats normally occupied by each species. This prediction was upheld by the data. The mean leaf life span determined for Araucaria araucana (24 years) is among the highest figures reported for any plant species. This extreme leaf longevity...
Tipo: Journal article Palavras-chave: Araucaria araucana; Leaf longevity; Leaf nitrogen; Podocarpus; Resource gradients; Specific leaf area.
Ano: 2001 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000300017
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Incendios en bosques de Araucaria araucana y consideraciones ecológicas al madereo de aprovechamiento en áreas recientemente quemadas RChHN
GONZÁLEZ,MAURO E; VEBLEN,THOMAS T.
El fuego es el tipo de disturbio más importante en conformar el paisaje forestal de Araucaria araucana en la zona centro-sur de Chile y Argentina. En la Región de la Araucanía el clima y el ser humano han influenciado el régimen de fuego durante al menos los últimos mil años. Los incendios catastróficos ocurridos recientemente (año 2002) que afectaron los bosques de Araucaria atrajeron la atención pública, política y científica generando una importante necesidad de entender las causas y efectos de tales eventos en los ecosistemas forestales. Estos grandes incendios produjeron una abundante cantidad de material muerto en pie y en el suelo, promoviendo el desarrollo de otros atributos estructurales conocidos como legados biológicos que tienen un rol crítico...
Tipo: Journal article Palavras-chave: Araucaria araucana; Madereo de aprovechamiento; Incendios; Historia de fuego.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000200009
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Efectos de la producción de semillas y la heterogeneidad vegetal sobre la supervivencia de semillas y el patrón espacio-temporal de establecimiento de plántulas en Araucaria araucana RChHN
SANGUINETTI,JAVIER; KITZBERGER,THOMAS.
El establecimiento de plántulas puede estar limitado por la producción de semillas y asociada a la producción intermitente y sincronizada de semillas (masting) y/o por granivoría, o por falta de micrositios aptos para la germinación y crecimiento de las plantas. La dispersión y supervivencia de semillas desde el árbol madre pueden determinar el patrón espacial del establecimiento y la literatura propone varios modelos de distancia madre-plántula. En este trabajo se estudiaron los efectos del masting, de la depredación de semillas y de la vegetación sobre el establecimiento en A. araucana. A partir de datos sobre producción de conos, sobre supervivencia de semillas y mediante el registro de plántulas a escala del árbol en distintos micrositios se evaluó el...
Tipo: Journal article Palavras-chave: Araucaria araucana; Establecimiento; Masting; Modelo de Janzen-Connell.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000300001
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Araucaria araucana and the Austral parakeet: pre-dispersal seed predation on a masting species RChHN
SHEPHERD,JOHN D; DITGEN,REBECCA S; SANGUINETTI,JAVIER.
Pre-dispersal seed predation by Austral parakeets, Enicognathus ferrugineus, on pehuén, Araucaria araucana, was studied to assess the relationship between predation and seed production. We collected falling seeds in four araucaria forests of southwestern Neuquén Province, Argentina during four years that included both mast and intermast years. Predation rates were negatively correlated with seed production. When seed production was high, predation rates ranged from 0.6 to 3.3 %; when it was low, predation rates ranged from 13.0 to 20.6 %. Years differed in the pattern of monthly seed fall with peak seed fall in March 2002 and April 2003. Predation rates were lower and more uniform in the year of higher seed production, but did not differ between sites. In...
Tipo: Journal article Palavras-chave: Pre-dispersal seed predation; Masting; Araucaria araucana; Enicognathus ferrugineus.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300008
Registros recuperados: 9
Primeira ... 1 ... Última
 

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