期刊
FOREST ECOLOGY AND MANAGEMENT
卷 363, 期 -, 页码 11-20出版社
ELSEVIER
DOI: 10.1016/j.foreco.2015.12.018
关键词
Forest management; Genetic variation; Microsatellite markers; Nothofagus; Species composition; Mixed forest
类别
资金
- Institute Nacional de Tecnologdia Agropecuaria [PNFOR 044001]
- Universidad Nacional del Comahue [04/S016]
- Programa de Mejoramiento de Especies Forestales (PROMEF) [BIRF 7520-AR]
- IBBR-CNR
Knowledge of the impact of forest management practices is crucial to allow the use of natural resources while ensuring the sustainability of genetic variation, which is essential for the potential adaptive capacity of forests. The main objective of this work was to study the effects of a seed cut on the genetic diversity of a mixed Nothofagus forest in northwestern Andean Patagonia. Silviculture based on the shelterwood system was carried out in stands composed of Nothofagus dombeyi, Nothofagus nervosa and Nothofagus oblique, located in Lanin Natural Reserve (Neuquen province, Argentina). Through intensive sampling of pre (mature trees) and post (regeneration) harvest populations of all three species from a 3-ha plot established after 20 years of the silvicultural intervention, in combination with microsatellite genotyping (more than 2000 individuals with 15 markers), we determined that modification of relative abundance of species in the post-harvest population that followed the implemented management had altered the global genetic diversity of the mixed forest; however, no impact was detected at species level in the entire plot or in two subplots with different species proportions. Pollen and seed dispersal from the surrounding areas may have contributed significantly to maintaining both genetic diversity in the postharvest natural regeneration and the low differentiation between this and the pre-harvest gene pool in all species. The use of species-specific markers allowed us to determine that the level of introgressive hybridization was not changed by management; however, further studies are required to evaluate whether this practice influences the directionality of introgression. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据