摘要
As conservation genetics is integrated into multipurpose forest management, questions regarding the genetic effects of silviculture arise. Careful harvesting regimes, using natural regeneration, could preserve genetic resources within commercially important species, both in reserves and in logged areas. We investigated the effects of two natural regeneration methods, shelterwood and group selection cutting, on subsequent pollen movement and mating system in four native stands of monospecific Scots pine (Pinus sylvestris L.) in the Guadarrama Chain of central Spain. Using TwoGener analysis, we estimated an average pollination distance of 17–22m and a relatively large effective number of pollen donors (Nep>70). We found a non-significant trend toward increasing pollination distance and larger effective number of pollen donors, subsequent to cutting. Considering the high conspecific density of the stands we studied (80–315 trees/ha), pollen dispersal estimates seem consistent with values from other studies, using other methods. Mating system analysis, using the MLTR mixed-mating model, showed high outcrossing rates for all four stands (tm