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Timber management with variable retention in Nothofagus pumilio forests of Southern Patagonia
Authors:Guillermo Martí  nez Pastur,Marí  a Vanessa Lencinas,Juan Manuel Cellini,Pablo Luis Peri,Rosina Soler Esteban
Affiliation:1. Centro Austral de Investigaciones Científicas (CONICET), cc 92 (9410) Ushuaia, Tierra del Fuego, Argentina;2. Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, cc 31 (1900) La Plata, Buenos Aires, Argentina;3. Instituto Nacional de Tecnología Agropecuaria - Universidad Nacional de la Patagonia Austral - CONICET, cc 332 (9400) Río Gallegos, Santa Cruz, Argentina
Abstract:Forestry practices integrating ecological and social criteria have been replacing those based only on economic values. Traditional silviculture, such as shelterwood cuts (SC), transforms uneven-aged original stands to an even-aged managed forest. Recently, other methods have proposed to conserve some of the original heterogeneity of the old-growth forests. One proposal leaves 30% of the timber quality forest area as aggregated retention and 20% basal area as dispersed retention. The aim of this study was to analyze the feasibility of timber management with aggregated and dispersed retention in Nothofagus pumilio old-growth forests by analyzing timber and harvesting yield potential compared with traditional regeneration systems. Also, remnant tree stability of aggregated retention was analyzed.
Keywords:Sustainable forestry   Aggregated retention   Dispersed retention   Yield   Windthrow
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