Keywords fragmentation;islands;Castanopsis sclerophylla;maintenance mechanism;ecological restoration;Qiandao Lake;population genetic structure;gene flow;microsatellite markers;key factors;

• 片断化;岛屿;苦槠;维持机制;生态恢复;千岛湖;种群遗传结构;基因流;微卫星标记;关键因子;