摘要
选择武夷山国家公园内海拔1300~1600 m且处于同一坡面上的4个固定样地(40 m×50 m),采用点格局方法比较分析了各海拔梯度下不同林层(受光层和非受光层)优势种群的空间点格局。(1)武夷山典型针阔混交林4个样地全林树木的胸径分布、树高分布均呈倒“L”型,幼龄树木占比大,种群垂直连续性好,径级结构和群落更新良好;黄山松、格药柃和马银花是4个针阔混交林样地均存在的优势树种。(2)随着海拔的升高,上述3种优势树种在0~30 m尺度上集群分布增加,随机分布减少,在30~50 m尺度上均匀分布增加。(3)在受光层中,这3种优势树种在0~30 m尺度上呈现集群分布增加的趋势,30~50 m尺度上呈现均匀分布。而在非受光层中,马银花在0~30 m尺度上的集群分布增加,随机分布减少,30~50 m尺度上呈现均匀分布;格药柃在0~30 m尺度上既有集群分布也有随机分布,30~50 m尺度上的均匀分布减少,随机分布增加。因此,随海拔升高,优势种群在0~30 m小尺度上的集群分布程度增加;非受光层的种群空间格局受海拔变化的影响较受光层更为显著。
Four fixed plots were set up within the same slope at an altitude of 1300-1600 m in Wuyishan National Park,and the spatial point patterns of dominant tree populations in light and non⁃light receiving layers at different altitude gradients were analyzed using point pattern method.The results showed that:(1)the whole forests of the 4 plots,mainly made up of young trees,showed inverted“L”type distribution on diameter at breast height(DBH)and tree height,and presented good population continuity in the vertical direction,diameter class structure and community regeneration capacity.Pinus taiwanensis Hayata,Eurya muricata Dunn and Rhododendron ovatum(Lindl.)Planch.ex Maxim.were the dominant species in all the plots.(2)With the increase of altitude,the dominant tree species were more aggregately distributed than randomly at the scale of 0-30 m,and its uniform distribution was increased at the scale of 30-50 m.(3)In the light receiving layer,the dominant tree species were increasingly aggregately distribu⁃ted at the scale of 0-30 m,while uniformly distributed at the scale of 30-50 m.In the non⁃light receiving layer,the distribution of R.ovatum was increasingly aggregated at the scale of 0-30 m with reduced random distribution,and tended to be uniform at the scale of 30-50 m.E.muricata showed aggregated and random distribution pattern at the scale of 0-30 m,while its distribution was in⁃creasingly random at the scale of 30-50 m.In conclusion,with the increase of altitude,the dominant populations presented increas⁃ingly aggregated distribution at small scale of 0-30 m,and the impact of altitude on the spatial distribution of dominant species in the non⁃light receiving layer was more significant than light receiving layer.
作者
余云钦
林文俊
陈世品
范敦锦
傅榕榕
游巍斌
YU Yunqin;LIN Wenjun;CHEN Shipin;FAN Dunjin;FU Rongrong;YOU Weibin(College of Forestry,Fujian Agriculture and Forestry University;Fujian Southern Forest Resources and Environmental Engineering Technology Research Center,Fuzhou,Fujian 350002,China)
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2023年第5期649-659,共11页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
国家自然科学基金项目(32271872)。
关键词
武夷山国家公园
空间格局
针阔混交林
海拔
Wuyishan National Park
spatial pattern
coniferous and broad⁃leaved mixed forest
altitude
