确定森林群落最小调查面积的方法  

Method on Determining Minimum Survey Area of Forest Communities

作　　者：佟金权[1] 惠刚盈[2] 赵中华[2] 周红敏[2] 

机构地区：[1]国家林业局科技发展中心,北京100714 [2]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091

出　　处：《林业科学研究》2008年第3期331-334,共4页Forest Research

基　　金：“十一五”林业科技支撑课题(2006BAd03A0803)

摘　　要：研究分析了来自中国、蒙古、缅甸、南非和德国的具有林木空间位置坐标和树种组成的试验地数据,提出了利用模型和数学手段确定森林群落最小面积的新方法。通过从样地中心设立方形样方并按10 m的间隔逐渐扩大样地边长并统计树种数的方法获取种-面积数据,并建立种-面积模型,令模型二阶导数为零或近似为零(1×10-6)来确定最小面积。研究还发现,最小面积和最大树种数的关系可用半对数模型很好描述,实践中可直接借助本研究所提出的模型用潜在的树种数来估计调查所需的最小面积。The size of survey area is very important to proper express the characteristics of the forest communities. This paper studied on the research plot dataset which composed by tree spatial positions data and tree species composition from China, Mongolia, Myanmar, South Africa and Germany, a new approach on determining the forest communities＇ minimum survey area presented by model and mathematics method. By setting quadrate sample in the center of plot and then enlarging its edge length interval 10 m to get the data of species-area curve and establish the species-area model, the minimum survey area can be determined by making the value of second derivative model is zero or approximate zero （ 1 × 10 ^-6 ）. The study also found that the relationship of minimum area with maximum species can be well described by semi-logarithm and the model can be directly estimated the survey minimum area by using potential tree species quantity in practice.

关 键 词：森林群落 最小面积 数学方法 

分 类 号：S757[农业科学—森林经理学]