【摘要】 该文研究了王朗自然保护区大熊猫栖息地内 6个亚高山针叶林样地的结构 ,分析了树干的大小、年龄和空间分布格局 ,运用树干胸径生长格局解释了林地干扰的历史 .研究结果表明 :王朗自然保护区亚高山针叶林的组成、结构与林地干扰历史息息相关 .林冠层的干扰严重影响着王朗自然保护区亚高山针叶林的组成和结构 .树干的风倒、掘根和折干形成了林窗 ,而林窗的形成在过去 2 0 0a时期内是一个相对连续的小尺度过程 .树倒和折干使林木平均每 6a有一个生长释压 .林窗促进了树木的更新 ,并使得林木林冠组成能够得以维持 .同时森林的更新受林下竹子同幼苗生长竞争和竹子生物学特性的影响更多还原

【Abstract】 Regeneration patterns and disturbance history of 6 subalpine forests were analyzed through the analysis of population structures (size, age, spatial patterns) and radial growth patterns in giant panda’s habitat in Wanglang Natural Reserve in Sichuan Province, China. There was a close correspondence between forest composition, structure and disturbance history of forest stands. One of the most important disturbances was the canopy disturbance that led to the formation of gap as the result of uprooting treefall, standing death, and trunk snapping. Gap formation in these stands was a relatively continuous small scale process during the past period of 200 years. Treefalls and trunk snapping resulted in growth releases in average every 6 year. Gap formation initiated the tree regeneration and maintained current forest canopy composition. Meanwhile, tree seedling competition with bamboos and bamboo growth cycle controlled patterns of tree regeneration and therefore community structure and dynamics.更多还原