摘要
【目的】种群空间格局对阐明植物群落构建与动态具有重要意义。【方法】在广西大明山国家级自然保护区建立了一个面积3.2hm^2的常绿阔叶林固定样地。运用O-ring空间点格局分析方法对样地8个优势种的空间格局以及种群大小关联和种间关联进行了研究。【结果】8个优势树种及其小径级个体在小尺度上均为聚集分布;云贵山茉莉和毛狗骨柴的大径级与其小径级个体在小尺度上呈正相关,而罗浮槭的大径级与小径级在0~40m上为负相关;58个种对中有2个种对在小尺度上表现正相关。【结论】种子扩散限制与微生境异质性是大明山常绿阔叶林优势种共存的原因。但是,有关中国亚热带常绿阔叶林的群落构建机制还有待深入研究。
【Objective】It is well known that the spatial pattern in plant communities plays an important role in community assembly and dynamic.【Methods】We analyzed the population structure of eight dominant tree species at a 3.2hm^2 subtropical evergreen broadleaved forest plot in Damingshan Nature Reserve in southern China.Based on the O-ring statistic,a technique of spatial point pattern analysis,we analyzed small-scale intraspecific spatial distribution patterns and intra-or inter-specific spatial association patterns among eight dominant species.【Results】The results showed that significant aggregated for intraspecific,and for smaller trees within species at small scales.Large trees of Huodendron biaristatum and Diospyros morrisiana showed significant positive association with their smaller trees at small scales,while large tree of Acer fabric showed significant negative association with its smaller trees at all scales of 0~40m.Only 2 of 58 species pairs among these species showed significant small-scale positive association.【Conclusion】These results revealed that seed dispersal limitation and microhabitat heterogeneity might contribute to the coexistence of these dominant species at subtropical evergreen broadleaved forest in Damingshan.However,the ecological assembly rules in subtropical evergreen broadleaved forest are required to further explore in southern China.
出处
《广西科学》
CAS
2014年第5期436-446,共11页
Guangxi Sciences
基金
国家科技支撑计划项目(2011BAC09B02)
广西重大科技专项计划项目(1222005)资助
关键词
点格局分析
O-ring统计
空间关联
亚热带常绿阔叶林
群落构建
point pattern analysis, the O-ring statistic, spatial association, subtropical evergreenbroadleaved forest, community assembly
