The Regeneration of Tree Species in Subalpine Dark Coniferous Forest in the Wolong Nature Reserve

18 gap patches and the controlled quadrates near gap patches of understory were sampled in subalpine dark coniferous forest in Wolong Nature Reserve.For each gap patch and controlled quadrate,the quantity characteristics of the major tree species and shrubs were measured,as well.According to different importance value of the major trees between gap and understory and their ecological characters,the major tree species in the whole community were classified into two ecological groups of species(pioneer group and shadetolerant group).The composition of ecological groups of species was distinctly different in gaps and understory,and the recruitment of the seedlings for the two ecological groups of species in gap patches differed from that in understory condition,which is due to their different ecological characters and gap conditions.As a dominant species of the shrubs layer,the growth of dwarf bamboo had affected the regeneration patters of the species.