长白山杨桦次生林主要树种的空间分布格局及其关联性  

Spatial Distribution Patterns and Associations of Dominant Tree Species in Poplar-Birch Secondary Forest Stand in Changbai Mountains

作　　者：杜志[1] 亢新刚[1] 孟京辉[1] 孔雷[1] 郭韦韦[1] 岳刚[1] 

机构地区：[1]省部共建森林培育与保护教育部重点实验室(北京林业大学),北京100083

出　　处：《东北林业大学学报》2013年第4期36-42,共7页Journal of Northeast Forestry University

基　　金：林业公益性行业科研项目(200804027)

摘　　要：基于长白山杨桦次生林1 hm2样地调查数据,采用点格局O-ring统计分析了4个主要树种在不同林层的空间分布格局和空间关联性。结果表明:高林层的白桦在部分尺度上表现聚集分布,低林层白桦以随机分布为主,而高低林层红松的格局分布反之,枫桦和冷杉在小尺度上都以聚集分布为主。不同林层上的空间分布格局,聚集度随林层高度增加而减小,红松和枫桦在低林层中聚集分布较明显,在高林层中呈现明显随机分布。不同树种在不同林层中空间关联性多样,在小尺度上,低林层的红松与高林层的白桦、红松表现为正相关,与冷杉表现为负相关;红松、枫桦与白桦在高林层中的两两关联性以负相关为主。随着空间尺度的增加,树种空间分布格局普遍转变为随机分布,空间关联性趋向于相互独立。The data from a 1-hm2 polar-birch secondary forest in Changhai Mountain were conducted to analyze the spatial distribution patterns and associations of four dominant trees species among different vertical layers by using a point pattern analysis method of the O-ring statistic. The results show that Betula platyphylla in higher layer is clumped at some scales, and B. platyphyUa in lower layer is dominated by the random distribution, while the distributions of P/nus koraiensis in higher and lower layers are contrary to that of B. platyphylla. B. costata and Abies nephrolepis are aggregated at smaller scales. The aggregation degree decreases with the increase of the layer height. P. koraiensis and B. costata show the aggregation distributions in lower layer, but random distributions significantly in higher layer. The spatial associations of different tree spe- cies vary among different layers. At small scales, P. koraiensis in lower layer is positively correlated with B. platyphylla and P. koraiensis in higher layer, but negatively correlated with A. nephrolepis. The negative associations appear widely between two species of P. koraiensis, B. costata and B. platyphylla. With the increase of spatial scale, the spatial distri- bution patterns generally transform into random distribution patterns, and the spatial associations trend to be independent.

关 键 词：杨桦次生林 O—ring统计 空间格局 空间关联性 

分 类 号：S758.53[农业科学—森林经理学]