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| Registros recuperados: 10 | |
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| Muñoz,Alejandra E; Simonetti,Javier A. |
| Guanaco (Lamaguanicoe), the only native ungulate of Tierra del Fuego, uses the forests more extensively after the introduction of sheep. It is presumed that the regeneration of lenga (Nothofagus pumilio) is hampered by guanaco browsing. In this context, the diet of guanaco in Tierra del Fuego was evaluated through a microhistological analysis of feces in a livestock-free area dominated by lenga forest. Guanacos behaved largely as herbivorous grazers and exhibited seasonal variations in their grazing habits. Compared to other studies in Tierra del Fuego, which were conducted in areas where sheep and guanaco grazed together, we reported that the guanacos avoided and consumed fewer trees. These results have management implications, as the proper management of... |
| Tipo: Journal article |
Palavras-chave: Lama guanicoe; Nothofagus pumilio; Feeding habits; Microhistological analysis. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100016 |
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| Chaneton,Enrique J; Mazía,Noemí; Garibaldi,Lucas A; Chaij,Jaquelina; Kitzberger,Thomas. |
| Volcanism has been a major force shaping the dynamics of Andean landscapes during the Holocene. Yet we still know little about the consequences of modern volcanic events on forest functioning. Ash fall may elicit multiple direct and indirect effects on key ecosystem attributes, with disturbance severity likely varying with distance to the crater. We examined the impact of ash deposition on foliage productivity and insect herbivory after the 2011 eruption of the Volcán Puyehue-Cordón Caulle system, in Nothofagus pumilio forests of northern Patagonia, Argentina. Tree leaf litterfall, a surrogate for annual foliar production, was measured before and after the event in wet and dry forest sites, which were located 22 km and 80 km east from the crater and were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canopy insects; Disturbance; Herbivory; Long-term study; Nothofagus pumilio; Productivity; Volcanism. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2014000100007 |
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| Latsague V.,Mirtha; Lara G.,Janina. |
| Los compuestos fenólicos en concentraciones altas participan como inductores de la oxidación de auxinas, interfiriendo con la formación de raíces adventicias en estacas de tallo. Al no obtener enraizamiento en estacas de lenga (Nothofagus pumilio (Poepp. et Endl.) Krasser) en invierno y verano, se atribuyó que esto se debía a una alta cantidad de fenoles producidos en lenga, comparado con otros Nothofagus. En este estudio se procedió a cuantificar el contenido de fenoles solubles totales en estacas de lenga a través del método analítico Folin-Dennis, y comparar con el contenido de fenoles solubles totales en raulí (Nothofagus alpina (Poepp. et Endl.) Oerst.), especie que sí forma raíces adventicias. El contenido de fenoles solubles obtenidos en N. pumilio... |
| Tipo: Journal article |
Palavras-chave: Compuestos fenólicos; Nothofagus pumilio; Rizogénesis. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000200002 |
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| THIERS,OSCAR; GERDING,VICTOR. |
| Se investigó la variabilidad de las relaciones topográficas y edáficas en sitios con presencia de Nothofagus betuloides y especies arbóreas asociadas en el suroeste de Tierra del Fuego. Estas relaciones se analizaron con métodos estadísticos bivariados y multivariados. Las relaciones del suelo con la topografía estarían fuertemente ligadas a características climáticas (temperatura y humedad) de los sitios. Los suelos más fértiles por su mayor profundidad y mejor drenaje, se ubicaron en terrenos de menor elevación (< 150-200 m) y pendiente (< 5 %). Los bosques puros de N. betuloides se desarrollan en un amplio rango topográfico, con mayor variación de suelos. Las diferentes asociaciones de N. betuloides con las especies N. pumilio, N. antractica y... |
| Tipo: Journal article |
Palavras-chave: Suelos; Topografía; Nothofagus betuloides; Nothofagus pumilio; Tierra del Fuego. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000200006 |
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| PARITSIS,JUAN; VEBLEN,THOMAS T. |
| In the temperate forests of Chile and Argentina the phytophagous moth Ormiscodes amphimone (F.) causes severe defoliation on the southern beech tree Nothofagus pumilio (Poepp. & Endl.) Krasser. The recent increase in defoliation frequency in some áreas appears to be influenced by a warmer climate. To evalúate the effects of temperature and the spatial heterogeneity of foliage quality on the performance and relative consumption rate of O. amphimone in northwestern Patagonia, Argentina we conducted a factorial experiment. Larval performance was measured as relative growth rate, developmental time, larval survival, and pupal weight. Larvae of O. amphimone were reared under two constant temperature regimes (15 °C and 20 °C) and fed with two N. pumilio... |
| Tipo: Journal article |
Palavras-chave: Herbivory; Nothofagus pumilio; Outbreaks. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000400012 |
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| Registros recuperados: 10 | |
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