Are silvopastoral systems compatible with forest regeneration? An integrative approach in southern Patagonia

Authors
Soler Esteban, Rosina Matilde; Martínez Pastur, Guillermo José; Peri, Pablo Luis; Lencinas, María Vanessa; Pulido, Fernando
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
We used an integrated approach to analyze the influence of silvopastoral management on the biotic and abiotic factors influencing on the natural recruitment of native forests in Tierra del Fuego (Argentina). The probabilities of transition from flowers to seeds to seedlings were estimated in forests with silvopastoral management (i.e., stands that had been both grazed and thinned), secondary growth stands, and unmanaged old-growth areas. Pre-dispersal losses were caused by microclimate and insect predation acting on flowers and immature fruits. Post-dispersal losses resulted from the impact of reduced litterfall and microclimate. But the most critical stage of the overall cycle was seedling establishment. Silvopastoral practices and stand age modified the main drivers of regeneration. While flowering was unaffected by management, fruiting and seed production were more successful in unmanaged forests. Seedling establishment and survival were favored by canopy cover reduction in silvopastoral stands. The increase of solar radiation and soil moisture in managed forests positively influenced the seedling establishment and survival, while in second-growth forests it was limited by suitable micro-site availability. Thinning practices aimed at increasing the understory heterogeneity in mature forests and restoring canopy complexity of second-growth stands could be suitable for sustainable management of these temperate forests.
Fil: Soler Esteban, Rosina Matilde. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Austral de Investigaciones Cientificas; Argentina
Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Austral de Investigaciones Cientificas; Argentina
Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; Argentina. Instituto Nacional de Tecnología Agropecuaria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lencinas, María Vanessa. Consejo Nacional de Invest.cientif.y Tecnicas. Centro Austral de Investigaciones Cientificas; Argentina
Fil: Pulido, Fernando. Universidad de Extremadura; España
Subject
FLOWERING
FOREST MANAGEMENT
RECRUITMENT
REPRODUCTIVE LOSSES
SEED PREDATION
SEEDLING SURVIVAL
Otras Agricultura, Silvicultura y Pesca
Agricultura, Silvicultura y Pesca
CIENCIAS AGRÍCOLAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/26737