亚高山针叶林不同大小林窗植物多样性及其海拔动态陈力;刘国华;刘丹;石松林【摘要】通过典型抽样法,分析了川西亚高山针叶林不同大小林窗中植物物种的更新组成及其沿海拔的动态变化,研究了林窗大小及林窗海拔对林窗内植物多样性的影响.结果表明:(1)随林窗海拔的降低,乔灌层主要植物种垂直分布格局明显,林窗中植物种类组成逐渐增多,各物种更新数量逐渐增大,林窗越大,增加趋势越明显;(2)在不同海拔、不同大小林窗中,岷江冷杉Abies faxoniana在乔木层物种重要值排序中始终位列第一,大叶金顶杜鹃Rhododendron faberisp、无柄杜鹃Rhododendron watsonii和华西箭竹Fargesia nitida重要值分别占据高、中、低海拔林窗中灌木层物种的首要位置,草本层主要物种排序有变化,但无明显规律;(3)物种丰富度指数、Shannon-wiener物种多样性指数与林窗大小成极显著正相关,Simpson生态优势度与林窗大小呈极显著负相关,Pielou均匀度指数与林窗大小呈正相关但相关性不显著;(4)低海拔林窗中植物多样性最高,其次为中海拔,高海拔林窗中的植物丰富度指数、Shannon-wiener物种多样性指数、Pielou均匀度指数和Simpson生态优势度指数与中低海拔之间存在显著差异.%Through typical sampling method,this paper analyzed the composition and updated dynamic changes along altitude gradients,studied the effects of gap size and elevation to plant species in gaps.The results indicated:(1) with the decrease of forest gap elevation,the pattern of main plants in trees layer and shrubs layer in forest gaps distributed obvious,plant species composition and update quantity in forest gaps increased gradually.What's more,the greater the gaps,increasing trend more obvious;(2) In different size gaps along altitude gradients,Abies faxoniana always ranked first intree layer species significant value sort,significant value of Rhododendron faberisp,Rhododendron watsonii and Fargesia nitida respectively occupied the first place at high,middle and low altitude in forest gap shrub species,the significant value of main species ordering in herb layer is mutative,but without obvious regularity;(3) There is a very significant positive correlation between forest gap size and species richness index and Shannon wiener diversity index,there is a very significant negative correlation between forest gap size and Simpson ecological dominance index,there is a positively related between forest gap size and Pielou evenness index,but had no significant correlation;(4) The highest plant diversity in forest gap at the low altitude,the medium altitude followed,there is significant differences between forest gaps at high altitude and medium altitude and low altitude of plant richnessindex,Shannon-wiener diversity index,Pielou index and Simpson ecological dominance index.【期刊名称】《中南林业科技大学学报》【年(卷),期】2017(037)010【总页数】8页(P90-97)【关键词】林窗;大小;海拔;植物多样性;亚高山针叶林【作者】陈力;刘国华;刘丹;石松林【作者单位】中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085;中国科学院大学资源与环境学院,北京100049;中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085;中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085;中国科学院大学资源与环境学院,北京100049;中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085;中国科学院大学资源与环境学院,北京100049【正文语种】中文【中图分类】S718.54林窗是森林更新的重要驱动力，是森林群落内植物更新的主要场所，对森林生物多样性的维持和生态系统的可持续发展具有重要影响[1-3]。
