INVESTIGADORES
MARTINEZ PASTUR Guillermo Jose
congresos y reuniones científicas
Título:
Regeneration dynamics in managed Nothofagus forests of Patagonia: Variable retention and shelterwood cuts implications
Autor/es:
G MARTÍNEZ PASTUR; P PERI; MV LENCINAS; JM CELLINI; R VUKASOVIC; R SOLER ESTEBAN; H IVANCICH
Lugar:
BARILOCHE
Reunión:
Congreso; VI SOUTHERN CONNECTION CONGRESS; 2010
Resumen:
When a new silvicultural method was proposed, foresters in Patagonia used the regeneration as the
decisive indicator to evaluate it. For this, silvicultural research projects focus their studies on the
regeneration dynamics, but also in remnant overstory stability, understory and soil nutrient changes,
eco-physiology, micro-environments influence, micro-climate and browsing. Most of these studies were
conducted in long-term research plots. The present work presents ten years results of regeneration
dynamics, and their silvicultural implications of the two main regeneration treatments: shelterwood cuts
(SC) and variable retention (VR). Results showed that: (1) seedlings were established after the harvesting
and few of the plants of primary forests survived; (2) establishment and growth were related to canopy
closure, and magnitude of micro-climate and soil properties changes; (3) remnant overstory stability
were deficient in SC and dispersed retention, but was stable into the aggregated retention, influencing
over establishment and growth; (4) understory and micro-environments in the harvested areas
significantly influence over regeneration dynamics; (5) cattle and guanaco browsing not limited the
regeneration, but influence over growth during the first years after the harvesting. Both theoretical
proposals regenerated the stands, but SC homogenizes the growing conditions in the stands and VR
maintained some of the original heterogeneity of the primary forests.