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The aim of the present work was to evaluate the litter production and decomposition in a mixed araucaria forest in the south of Brazil. The vegetation of the area is characterized by two forest types: forest type I, with the upper canopy dominated by Araucaria angustifolia; and forest type II, with higher diversity of tree species, predominantly broad-leafed species in the dominant canopy stra ...

SUBJECT: araucaria angustifolia; decay rate; litter production; tasa de descomposición; producción hojarasca

POSTED TO: Bosque (Valdivia) [0717-9200]

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The Nothofagus genus includes about 35 native tree species of the Southern hemisphere. In Patagonia various natural hybrids among different species of the genus were found. The aim of this work was to describe and determine the presence of putative natural hybrids between N. pumilio and N. antarctica at South Patagonia, through the study of morphological leaf characteristics. Twenty possible h ...

SUBJECT: morfometría foliar; natural hybridization; genetic improvement; leaf morphometry; hibridación natural

POSTED TO: Bosque (Valdivia) [0717-9200]

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This work was developed in the Cachapoal river basin, Andean Mountain, of Central Chile. In this basin the relations between anthropogenic factors and fire frequency in Austrocedrus chilensis forests were explored. Fire history of this area was reconstructed using cypress cross-sections dating, historical revision and local people interviews. Archaeological information reports human occupation ...

SUBJECT: cachapoal basin; influencia antropogénica; central chile; cuenca del cachapoal; anthropogenic influence

POSTED TO: Bosque (Valdivia) [0717-9200]

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This paper shows how, by applying geostatistical methods, maps of incidence of a parasite called coniferous dwarf mistletoe (Arceuthobium sp.) can be obtained; and thereof the spatial distribution, in the northern slope of the National Park Nevado de Toluca, is possible to be known. That distribution was achieved by establishing both methods: Statistical Not Space and Space and Statistics (Geo ...

SUBJECT: geostatistics; spatial modeling; semivariograms; krige; geoestadística

POSTED TO: Bosque (Valdivia) [0717-9200]

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The objective of this study was to analyze the germination of seeds of Albizia hassleri under different temperatures. A completely random design arranged as a split plot for temperatures regimes, with 11 seed lots and four replications of 15 seeds was used. The plot was represented by the various lots and the sub plots for different temperatures. The means were compared by Scott-Knott test at ...

SUBJECT: forest seeds; temperaturas de germinación; native species; semilla forestal; germination temperatures

POSTED TO: Bosque (Valdivia) [0717-9200]

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The study was conducted on a progeny test of Pinus greggii var. greggii established at Los Tarihuanes, Arteaga, Coahuila, Mexico. The objective was to convert a progeny test of Pinus greggii var. greggii into a seed orchard by simulating a silvo-genetic thinning and a tree selection through a selection index based on a principal components (CP) analysis. The selection index method based on the ...

SUBJECT: eigen-análisis; índice de selección; pinus greggii var. greggii; index of selection; pinus greggii

POSTED TO: Bosque (Valdivia) [0717-9200]

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A multitemporal analysis to determine the land cover change was conduced in the pre-Andean range of Maule region of Chile. We used satellite imagery from the year 1989 and 2003 to analyze the likely causes of native forest change. In this period, there was a reduction in native forest area of 44% in the study area, which is equivalent to an annual forest loss rate of 4.1%. The native forest ar ...

SUBJECT: native forest; sensores remotos; maule region; análisis multitemporal; remote sensing

POSTED TO: Bosque (Valdivia) [0717-9200]

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The aims were to determine the axial variation pattern for wood density of Populus deltoides clone ‘Australian 129-60’ and to develop a predictive model for whole tree density from density at one sample height. Eleven ten-year-old trees from three diametric classes were sampled in Buenos Aires Province, Argentine. Disks were taken at seven sampling heights (0.5 m; 0.7 m; 1.0 m; 2.2 m; 6.6 m; 1 ...

SUBJECT: density at 15% mc; prediction models; diametric classes; dbh-density relationship; variación axial

POSTED TO: Bosque (Valdivia) [0717-9200]

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The cypress aphid Cinara cupressi is considered one of the most important exotic invasive species in the world and now is present in all the national continental territory, affecting native forest species like ciprés de la cordillera (Austrocedrus chilensis) and alerce (Fitzroya cupressoides), as other exotic species used for ornamental trees in the urban area. The forest area of Chile has pro ...

SUBJECT: forest pest; plaga forestal; pauesia juniperorum; control biológico; biological control

POSTED TO: Bosque (Valdivia) [0717-9200]

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Because of the harmful effect on the environment and the uncertainty in the future offer of the conventional source of energy, the lignocellulosic biomass is being considered as the most promising alternatives of solution. The evidence shows that an important way to get biomass turned into biofuels will be through establishing plantations with high growth rates and short rotation periods; plan ...

SUBJECT: biomass; hybrid poplars; biomasa; híbridos de álamo; dendroenergía

POSTED TO: Bosque (Valdivia) [0717-9200]

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