摘要
基于广东黑石顶自然保护区的数字植被分布图,在样地调查的基础上,采用ArcInfo的2种三维模型(TIN模型和Lattice模型)估算了该区的总生物量,并与二维尺度的分析结果进行了比较。结果表明纯针叶林的单位面积生物量一般低于200Mg hm2,成熟阔叶林的单位面积生物量则高达460Mg hm2。在森林的总生物蓄积量估算方面,2种三维模型的计算结果非常接近,约为810×103Mg,其中占保护区总覆盖面积10%的纯针叶林,生物蓄积量约占总生物蓄积量的7%,占总面积50%的针阔混交林,生物蓄积量约占38%,而占总面积仅33%的阔叶林,生物蓄积量则占55%。二维尺度的计算结果较三维模型估算的约低12%。海拔梯度变化的分析结果表明,生物蓄积量主要分布于海拔300～700m范围内,而单位面积生物量在海拔400～800m处较高。
The forest biomass in various types of communities at Heishiding nature reserve in Guangdong province was estimated with two kinds of 3-D models, TIN and Lattice. The results were compared with that in 2-D scale. The biomass per unit of area is usually less than 200 Mg/hm^2 in the coniferous forest, much less than that in the mature broadleaved forest with the maximum of 460 Mg/hm^2. The biomass in the needle and broadleaved mixed forest were quite different with their age and the status of disturbance. As for the estimation of total forest biomass in the nature reserve, the values with TIN and Lattice model were very close. It is about 810×10~3 Mg. The coniferous forest with 10% of the coverage in the nature reserve, accounts for 7% of the total biomass, while the needle and broadleaved mixed forest with 50% of the coverage, accounts for 38% of the total biomass. The broadleaved forest, with 33% of the coverage, accounts for 55% of the total biomass. Gradient analysis of the biomass along the altitude showed that the biomass mainly distributed in the belt from 300 m to 700 m. The biomass per unit of area is comparatively higher in the belt from 400 m to 800 m.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第4期66-69,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
广东省自然科学基金资助项目(021657)
广东省千百十工程优秀人才基金资助项目
关键词
森林
生物量
地理信息系统
3-D模型
forest
biomass
geographic information system
3-dimensional model
