| 摘要: |
| 【目的】研究南方集体林区栲树次生林的干扰类型及其林分结构特征，为今后南方地区常绿阔叶林的健康恢复提供参考依据。【方法】选取香农威纳指数、多样性指数、优势度、均匀度，分析福建省将乐林场栲树次生林乔木层的物种多样性，将多样性指数作为快速聚类因子，进行方差检验后划分林分不同干扰类型，分析不同林分类型的多样性和空间结构特征。【结果】1）将乐县栲树次生林与其顶级群落相比，其乔木层的物种多样性较小，未达顶级群落状态；2）经分析可将栲树次生林划分为3种干扰类型，即轻度干扰（类型Ⅰ），栲树占6成及以上；中度干扰（类型Ⅱ），栲树占3～5成；严重干扰（类型Ⅲ），栲树占2成及以下。3）不同干扰类型林分的香农威纳指数、多样性指数和均匀度大小排序为类型Ⅰ>类型Ⅱ>类型Ⅲ，优势度大小排序则相反；角尺度大小排序为类型Ⅰ（0.528 0）<类型Ⅱ（0.547 0）<类型Ⅲ（0.561 0），大小比数大小排序为类型Ⅰ（0.549 0）>类型Ⅱ（0.507 0）>类型Ⅲ（0.476 0），混交度大小排序为类型Ⅰ（0.840 0）>类型Ⅱ（0.740 0）>类型Ⅲ（0.600 0）。【结论】不同干扰类型栲树次生林的林木生长状态中庸，随着干扰程度的增加，其乔木层物种多样性指数降低，林分趋向于团状分布，混交度逐渐降低。 |
| 关键词: 栲树 干扰类型 物种多样性 角尺度 大小比数 混交度 |
| DOI： |
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| 基金项目:“十二五”国家科技支撑计划项目“南方集体林区生态公益林可持续经营技术研究与示范”（2012BAD22B05） |
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| Stand structure characteristics of Castanopsis fargesii secondary forest with different interference types |
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DU Yan,LIU Dong-lan,ZHENG Xiao-xian
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| Abstract: |
| 【Objective】The interference types and spatial structures of Castanopsis fargesii secondary forest were studied to improve the restoration of the evergreen broad-leaved forests in south China.【Method】The Shannon-wiener index,diversity index,dominance index and evenness index were selected to analyze the species diversity of Castanopsis fargesii secondary forests in Jiangle forest farm,Fujian Province.Then the diversity indexes were used as the fast clustering factor to classify the interference types based on variance test.At last,the diversity and spatial structure of each type were analyzed.【Result】(1) Compared to its climax community,Castanopsis fargesii secondary forest in Jiangle forest farm had less diversity than the state of climax community.(2)Castanopsis fargesii secondary forest could be divided into three interference types:light interference (type Ⅰ,≥60%),moderate interference (type Ⅱ,30%-50%) and serious interference (type Ⅲ,≤20%).(3) The Shannon-wiener indexes,diversity indexes and evenness indexes values of interference types were in a decreasing order of type Ⅰ>type Ⅱ>type Ⅲ while the dominances were opposite.The uniform angle indexes were in an increasing order of type Ⅰ (0.528 0)type Ⅱ(0.507 0)>type Ⅲ(0.476 0),and the mingling indexes were in a decreasing order of type Ⅰ (0.840 0)>type Ⅱ(0.740 0)>type Ⅲ(0.600 0).【Conclusion】Castanopsis fargesii secondary forest with different interference types showed mild growth. As the increase of inference degree,the diversity index decreased,the forest tended to be union-like,and the mingling degree gradually reduced. |
| Key words: Castanopsis fargesii interference type species diversity uniform angle index neighborhood comparison mingling |
