戴云山黄山松种群的空间分布格局与关联性  

Spatial distribution patterns and associations of Pinus taiwanensis population in Daiyun Mountain,Southeast China

作　　者：苏松锦[1,2,3] 刘金福[1,3] 马瑞丰[1,3] 詹银华 周姗姗[1,3] 洪伟[1,3] 

机构地区：[1]福建农林大学,福州350002 [2]福建三明林业学校,三明365001 [3]福建农林大学海峡自然保护区研究中心,福州350002

出　　处：《资源科学》2015年第4期841-848,共8页Resources Science

基　　金：福建省自然科学基金项目(2014J01380);教育部博士点基金项目(200803890011)

摘　　要：空间格局研究有助于深入理解物种共存与植被维持机制。基于戴云山1hm2样地调查数据,采用O-ring统计分析黄山松不同生长阶段与不同林层的空间分布格局与关联性。结果表明:戴云山黄山松幼苗和幼树储备丰富,中树次之,大树较少,种群径级结构大致呈倒J型,种群年龄属于增长型。戴云山黄山松聚集格局主要发生在0~26m尺度上,】26m尺度主要为随机或均匀分布。黄山松聚集程度随着龄级(幼苗→幼树→中树→大树)和树高(林冠层T→亚林层S→灌木层U)的增大而降低。黄山松的幼苗与幼树、幼苗与中树以正相关为主;而其幼苗与大树、幼树与中树、幼树与大树、中树与大树均以不相关为主。黄山松T层与S层关联性不明显,T层与U层、S层与U层在小尺度上呈明显负相关。生境异质性、密度制约和种间隔离某种程度上解释黄山松种群的空间格局。Spatial distribution patterns and associations of populations are helpful to understand species coexistence processes and vegetation maintenance mechanisms. Based on investigation data from a 1 hm2 Pinus taiwanensis forest in Daiyun Mountain National Nature Reserve,spatial distribution patterns and associations of different growth stages and stories were explored using O-ring statistics. In the plot,numbers of P. taiwanensis in different growth stages ranked from high to low were saplings(59.53%),medium size trees(23.97%),seedlings(15.98%)and large trees(0.52%). The class structure of diameter at breast height of P. taiwanensis exhibits an invert J shape,and its population shows a stable growth type. The P. taiwanensis population shows an aggregation distribution pattern at 0~26m,while the random or regular pattern mainly occurs at the scales of >26m. As expected,the intensity of P. taiwanensis spatial aggregation decreases with growth stage(seedlings → saplings → medium sized trees → large trees) and storey(forest canopy → sub-layer → shrub storey) increase. Spatial associations of P. taiwanensis between seedlings and saplings,and seedlings and medium size trees at most scales have positive association;while seedlings and large trees,saplings and medium size trees,saplings and large trees,and medium size trees and large trees show non-significant association. In terms of different stories,spatial association of P. taiwanensis between forest canopy and the sub-layer have non-significant association,while forest canopy and shrub storey,sub-layer and shrub storey exhibited negative association at short distances. We feel that the spatial patterns of P. taiwanensis in this plot are regulated by environmental heterogeneity,density dependence and species isolation.These results provide a scientific basis for the near-natural forest management of P. taiwanensis plantations.

关 键 词：点格局分析 空间关联性 O-ring统计 生长阶段 黄山松 戴云山 

分 类 号：S791.24[农业科学—林木遗传育种]