Provider: Ingenta Connect
Database: Ingenta Connect
Content: application/x-research-info-systems
TY - ABST
AU - Li, F.
AU - Zhang, L.
AU - Davis, C.J.
TI - Modeling the Joint Distribution of Tree Diameters and Heights by Bivariate Generalized Beta Distribution
JO - Forest Science
PY - 2002-02-01T00:00:00///
VL - 48
IS - 1
SP - 47
EP - 58
KW - forest
KW - bivariate generalized beta distribution
KW - Generalized beta distribution
KW - forest resources
KW - forestry research
KW - natural resources
KW - forestry science
KW - environmental management
KW - Johnson's SBB distribution
KW - forest management
KW - goodness-of-fit test
KW - forestry
KW - natural resource management
N2 - A bivariate generalized beta distribution (GBD-2) is fit to the joint frequency distribution of tree diameters and heights of 43 Douglas-fir (*Pseudotsuga menziesii* var. *glauca* [Beissn.] Franco) plots in Idaho. The model fitting and performance are compared with the Johnson's S_{BB} distribution using goodness-of-fit χ^{2} tests for the marginal distributions of diameters and heights, a bivariate goodness-of-fit test for the joint distribution of the two variables, and model predictions of tree heights and volumes. We found that the GBD-2 is more flexible and successful than the Johnson's S_{BB} in describing both marginal and joint distributions of tree diameters and heights. On average, the relative bias (%) from the GBD-2 is three times smaller than that from the Johnson's S_{BB} across the 43 plots when the models are used in tree volume prediction. FOR. SCI. 48(1):47–58.
UR - http://www.ingentaconnect.com/content/saf/fs/2002/00000048/00000001/art00005
ER -