应用生态学报2017，Vol.28Issue(9)：2813-2822,10.DOI:10.13287/j.1001-9332.201709.014
大兴安岭新林林业局3种林分类型天然更新幼苗幼树的空间分布格局
Spatial distribution pattern of seedlings and saplings of three forest types by natural regeneration in Daxin'an Mountains Xinlin Forestry Bureau, China
摘要
Abstract
Based on the survey data of 16 sampling plots in three main forest types (including Larix gmelinii forest,Betula platyphylla forest,and mixed coniferous and broad-leaved forest) in Daxing'an Mountains,the seedlings and saplings were divided into 3 grades according to plant height,i.e.,Grade Ⅰ,height ≤ 60 cm;Grade Ⅱ,60 cm ＜ height ≤ 200 cm;Grade Ⅲ,height ≥ 200 cm and diameter at breast height ＜5 cm.With four different sampling scales,distribution pattern and pattern intensity of seedlings and saplings were determined,and the pattern change and size were analyzed using seven clumping indices.The results showed that the seedlings and saplings of L.gmelinii were dominated by grade Ⅱ,and the density increased first and then decreased with the increase of grade.However,L.gmelinii in the other two forest types (i.e.,B.platyphylla forest and mixed forest) and B.platyphylla seedlings and saplings in all three forest types were dominated by grade Ⅲ,with the smallest number in grade Ⅰ,and the seedling density increased with the increase of grade level.L.gmelinii seedlings and saplings in the three forest types all had a clumping pattern on four different sampling scales.B.platyphylla seedlings and saplings in B.platyphylla forest also had a clumping pattern on four scales except the random distribution on 10 m × 20 m scale.L.gmelinii seedlings and saplings in mixed forest had the largest clumped intensity on 5 m × 10 m sampling scale,while L.gmelinii in the other two forest types and B.platyphylla seedlings and saplings in the three forest types had the largest clumped intensity with the sampling scale of 5 m × 5 m.The clumped intensities of L.gmelinii and B.platyphylla seedlings and saplings in L.gmelinii forest decreased with the increase of grade level,in which the distribution of B.platyphylla changed from clumping to random or uniform pattern.The clumped intensities of L.gmelinii and B.platyphylla seedlings and saplings in B.platyphylla forest and mixed forest increased with the increasing grade,changed from uniform to clumping pattern.The L.gmelinii and B.platyphylla seedlings and saplings with different regeneration grades in all three forest types had the same population pattern size of 25 m2.The population pattern intensities of L.gmelinii and B.platyphylla seedlings and saplings were significantly different in different forest types and regeneration grades.关键词
兴安落叶松/白桦/空间分布格局/尺度Key words
Larix gmelinii/Betula platyphylla/spatial distribution pattern/scale引用本文复制引用
贾炜玮,解希涛,姜生伟,李凤日..大兴安岭新林林业局3种林分类型天然更新幼苗幼树的空间分布格局[J].应用生态学报,2017,28(9):2813-2822,10.基金项目
本文由黑龙江省林业监测规划院黑龙江省市县林区森林植被空间分布及多样性研究项目、黑龙江省林业厅黑龙江省森林可持续经营试验示范区建设项目和大兴安岭地区林分密度调控技术研究及示范科技计划项目资助 （）
This work was supported by the Spatial Distribution and Diversity of Forest Vegetation in City and County Forest Area of Heilongjiang Province Funded by Forestry Monitoring and Planning Institute of Heilongjiang Province,the Heilongjiang Province Forestry Department Heilongjiang Province Sustainable Forest Management Experimental Demonstration Zone Construction Program,and the Research and Demonstration Technology of Stand Density Control in Daxing'anling Forest Region. （）
