Height-Diameter Allometry for Tree Species in Tanzania Mainland
Joint Authors
Malimbwi, Rogers Ernest
Mugasha, Wilson Ancelm
Mauya, E. W.
Njana, A. M.
Karlsson, K.
Ernest, S.
Source
International Journal of Forestry Research
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-21
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
Total tree height (H) and diameter at beast height (D) are important independent variables in predicting volume, biomass, and other forest stand attributes.
However, unlike D measurement, which is easy to measure with high accuracy, H measurement is laborious.
This study, therefore, developed H-D relationships for ten different forest types in Tanzania Mainland.
Extents in which climate and forest stand variables explain the variation in H-D allometry were also assessed.
A total of 31782 sample trees covering miombo woodlands, humid montane, lowland forests, bushlands, grasslands, mangroves, cultivated land, wetlands forests, and pines and Eucalyptus species plantations were used for model development.
The H estimating model without climate and forest stand variables referred herein as “base model” was first developed followed by “generalized model” which included climate and stand variables.
All the data were fitted using nonlinear mixed effect modelling approach.
Results indicated that generalized H estimating models had better fit than the base models.
We therefore confirm a significant contribution of climate and forest structure variables in improving H-D allometry.
Among the forest structure variables, basal area (BA) was far more important explanatory variable than other variables.
In addition, it was found that the mean tree H tends to increase with the increase of mean precipitation (PRA).
We therefore conclude that forest specific generalized H model is to be applied when predicting H.
When forest type information is not available, generalized regional model may be applied.
Base model may be applied when forest stand or climate information are missing.
American Psychological Association (APA)
Mugasha, Wilson Ancelm& Mauya, E. W.& Njana, A. M.& Karlsson, K.& Malimbwi, Rogers Ernest& Ernest, S.. 2019. Height-Diameter Allometry for Tree Species in Tanzania Mainland. International Journal of Forestry Research،Vol. 2019, no. 2019, pp.1-17.
https://search.emarefa.net/detail/BIM-1165252
Modern Language Association (MLA)
Mugasha, Wilson Ancelm…[et al.]. Height-Diameter Allometry for Tree Species in Tanzania Mainland. International Journal of Forestry Research No. 2019 (2019), pp.1-17.
https://search.emarefa.net/detail/BIM-1165252
American Medical Association (AMA)
Mugasha, Wilson Ancelm& Mauya, E. W.& Njana, A. M.& Karlsson, K.& Malimbwi, Rogers Ernest& Ernest, S.. Height-Diameter Allometry for Tree Species in Tanzania Mainland. International Journal of Forestry Research. 2019. Vol. 2019, no. 2019, pp.1-17.
https://search.emarefa.net/detail/BIM-1165252
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1165252