林业科学2017，Vol.53Issue(12)：12-19,8.DOI:10.11707/j.1001-7488.20171202
典型中亚热带天然阔叶林群落各乔木亚层的空间格局与关联性
Spatial Pattern and Association among Sub-Layers of Typical Mid-Subtropical Natural Broad-Leaved Forest Community
摘要
Abstract
[Objective] The objective of this study was to determine the construction mechanism of typical midsubtropical natural broad-leaved forest community by studying spatial pattern and association based on natural stratification of arbor-layer.[Method] Five plots in size of 50 m × 50 m set up at a location where the forest is nearly old-growth forest community in Wanmulin Nature Reserve in Fujian Province were investigated.The arbor layers of the plots were divided into sub-layers using the maximum light receiving plane (MLRP) method.The spatial pattern of each sub-layer and association of paired sub-layers therefore could be tested based on the spatial point pattern analysis.[Result] The arbor layer of each plot could be divided into light receiving layer (sub-layer Ⅰ) and none-light receiving layer (sub-layer Ⅱ).Arbor trees in each sub-layer of each plot are mainly in random pattern in the small spatial scale of 0-25 m.Only at a few scales trees of sub-layers deviated from the null model of complete spatial random,among them,trees of sub-layer Ⅰ tended to have a uniform dispersion because of strong competition and almost equivalent competitive power,but trees of sub-layer Ⅱ displayed a cluster pattern because of aggregation growth of some species in that sub-layer.Sub-layers Ⅰ and Ⅱ displayed overall non-significant association,most paired sub-layers displayed the null model at almost all scales indicating an equilibrium between total positive effects and total negative effects derived from various ecological processes.[Conclusion] The studied typical mid-subtropical natural broad-leaved forest communities are structured by neutral factors.The communities are stable and can be maintained for a long time because various ecological processes in the communities are at equilibrium.关键词
中亚热带/天然阔叶林/万木林/空间格局/关联性/乔木层的成层性/中性理论Key words
mid-subtropical zone/natural broad-leaved forest/Wanmulin/spatial pattern/association/stratification of arbor layer/neutral theory分类
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马志波,黄清麟,庄崇洋,郑群瑞,王宏..典型中亚热带天然阔叶林群落各乔木亚层的空间格局与关联性[J].林业科学,2017,53(12):12-19,8.基金项目
国家自然科学基金项目“中亚热带天然阔叶林林层特征研究”(31370633). （31370633）
