手法を比較

	林分断面積測定	アロメトリーバイオマス方程式
分野	林学	林学
系統	Process / pipeline	Process / pipeline
提唱年	1960s–1980s	1990s–2010s
提唱者	Classical forestry practice; formalized by Husch and colleagues	Chave, Niklas, and forest biometricians
種類	Measurement and calculation pipeline	Model development and application pipeline
原典	Husch, B., Beers, T. W., & Kershaw, J. A. (2003). Forest Mensuration (4th ed.). John Wiley & Sons.	Chave, J., Andalo, C., Brown, S., et al. (2005). Tree Allometry and Improved Estimation of Carbon-Stock and Density in Tropical Forests. Oecologia, 145(1), 87–99.
別名	Basal area inventory, Tree density measurement, Stand stocking assessment	Biomass allometry, Regression-based biomass prediction, Diameter-to-biomass conversion
関連	4	4
概要	Stand basal area is a fundamental forest mensuration metric representing the total cross-sectional area of tree stems per unit land area, typically expressed in square meters per hectare. Formalized across twentieth-century forestry literature (notably by Husch, Beers, and Kershaw), basal area serves as a key indicator of forest density, biomass accumulation, and competitive pressure, essential for yield prediction and stand management planning.	Allometric equations predict tree above-ground or total biomass from easily measured tree dimensions—typically diameter at breast height (DBH), height, and wood density. Grounded in biological allometry (scaling laws) and codified by Chave, Niklas, and others, allometric equations are essential tools for rapid biomass assessment without tree harvesting. Used globally for carbon accounting, yield estimation, and ecosystem characterization.