Volume Models for Single Trees in Tropical Rainforests in Tanzania

Abel Malyango Masota; Eliakimu Zahabu; Rogers Ernest Malimbwi; Ole Martin Bollandsås; Tron Haakon Eid

doi:doi:10.11648/j.jenr.20140305.12

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Volume Models for Single Trees in Tropical Rainforests in Tanzania

Abel Malyango Masota, Eliakimu Zahabu, Rogers Ernest Malimbwi, Ole Martin Bollandsås, Tron Haakon Eid

Published in Journal of Energy and Natural Resources (Volume 3, Issue 5)

Received: 15 October 2014 Accepted: 31 October 2014 Published: 10 November 2014

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Abstract

The present study was the first to develop total tree, stem and branches volume models for rainforests in south-eastern Africa based on destructive sampling. The number of sample trees was 60 and diameter at breast height (dbh) and total tree height (h) ranged from 6 to 117 cm and from 6.4 m to 50 m, respectively. Large parts of the total volume and stem volume variations were explained by the models (Pseudo-R2 ranged from 0.85 to 0.93) and they performed relatively well over different size classes. When considering the challenges in height measurements in rainforests, we in general recommend applying model 3 with dbh only as independent variable. For large trees we recommend model 2 (dbh and h as independent variables) because of the moderating effect h has on volume predictions. If accurate stem volumes are needed for forestry licensing or for calculating compensation of timber loss, we also recommend model 2. As long as the allometry of the trees obviously is not different from that of our study site, the developed models may also be applied for rainforests elsewhere in Tanzania, but further testing of the models is also recommended.

Published in	Journal of Energy and Natural Resources (Volume 3, Issue 5)
DOI	10.11648/j.jenr.20140305.12
Page(s)	66-76
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Total, Branches and Stem Volume, Form Factor, Destructive Sampling

References

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APA Style

Abel Malyango Masota, Eliakimu Zahabu, Rogers Ernest Malimbwi, Ole Martin Bollandsås, Tron Haakon Eid. (2014). Volume Models for Single Trees in Tropical Rainforests in Tanzania. Journal of Energy and Natural Resources, 3(5), 66-76. https://doi.org/10.11648/j.jenr.20140305.12

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ACS Style

Abel Malyango Masota; Eliakimu Zahabu; Rogers Ernest Malimbwi; Ole Martin Bollandsås; Tron Haakon Eid. Volume Models for Single Trees in Tropical Rainforests in Tanzania. J. Energy Nat. Resour. 2014, 3(5), 66-76. doi: 10.11648/j.jenr.20140305.12

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AMA Style

Abel Malyango Masota, Eliakimu Zahabu, Rogers Ernest Malimbwi, Ole Martin Bollandsås, Tron Haakon Eid. Volume Models for Single Trees in Tropical Rainforests in Tanzania. J Energy Nat Resour. 2014;3(5):66-76. doi: 10.11648/j.jenr.20140305.12

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@article{10.11648/j.jenr.20140305.12,
  author = {Abel Malyango Masota and Eliakimu Zahabu and Rogers Ernest Malimbwi and Ole Martin Bollandsås and Tron Haakon Eid},
  title = {Volume Models for Single Trees in Tropical Rainforests in Tanzania},
  journal = {Journal of Energy and Natural Resources},
  volume = {3},
  number = {5},
  pages = {66-76},
  doi = {10.11648/j.jenr.20140305.12},
  url = {https://doi.org/10.11648/j.jenr.20140305.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jenr.20140305.12},
  abstract = {The present study was the first to develop total tree, stem and branches volume models for rainforests in south-eastern Africa based on destructive sampling. The number of sample trees was 60 and diameter at breast height (dbh) and total tree height (h) ranged from 6 to 117 cm and from 6.4 m to 50 m, respectively. Large parts of the total volume and stem volume variations were explained by the models (Pseudo-R2 ranged from 0.85 to 0.93) and they performed relatively well over different size classes. When considering the challenges in height measurements in rainforests, we in general recommend applying model 3 with dbh only as independent variable. For large trees we recommend model 2 (dbh and h as independent variables) because of the moderating effect h has on volume predictions. If accurate stem volumes are needed for forestry licensing or for calculating compensation of timber loss, we also recommend model 2. As long as the allometry of the trees obviously is not different from that of our study site, the developed models may also be applied for rainforests elsewhere in Tanzania, but further testing of the models is also recommended.},
 year = {2014}
}

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TY  - JOUR
T1  - Volume Models for Single Trees in Tropical Rainforests in Tanzania
AU  - Abel Malyango Masota
AU  - Eliakimu Zahabu
AU  - Rogers Ernest Malimbwi
AU  - Ole Martin Bollandsås
AU  - Tron Haakon Eid
Y1  - 2014/11/10
PY  - 2014
N1  - https://doi.org/10.11648/j.jenr.20140305.12
DO  - 10.11648/j.jenr.20140305.12
T2  - Journal of Energy and Natural Resources
JF  - Journal of Energy and Natural Resources
JO  - Journal of Energy and Natural Resources
SP  - 66
EP  - 76
PB  - Science Publishing Group
SN  - 2330-7404
UR  - https://doi.org/10.11648/j.jenr.20140305.12
AB  - The present study was the first to develop total tree, stem and branches volume models for rainforests in south-eastern Africa based on destructive sampling. The number of sample trees was 60 and diameter at breast height (dbh) and total tree height (h) ranged from 6 to 117 cm and from 6.4 m to 50 m, respectively. Large parts of the total volume and stem volume variations were explained by the models (Pseudo-R2 ranged from 0.85 to 0.93) and they performed relatively well over different size classes. When considering the challenges in height measurements in rainforests, we in general recommend applying model 3 with dbh only as independent variable. For large trees we recommend model 2 (dbh and h as independent variables) because of the moderating effect h has on volume predictions. If accurate stem volumes are needed for forestry licensing or for calculating compensation of timber loss, we also recommend model 2. As long as the allometry of the trees obviously is not different from that of our study site, the developed models may also be applied for rainforests elsewhere in Tanzania, but further testing of the models is also recommended.
VL  - 3
IS  - 5
ER  -

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Author Information

Abel Malyango Masota

Tanzania Forest Services (TFS), P.O. Box 40832, Dar es Salaam, Tanzania
Eliakimu Zahabu

Sokoine University of Agriculture, Department of Forest Mensuration and Management, P.O. Box 3013, Morogoro, Tanzania
Rogers Ernest Malimbwi

Sokoine University of Agriculture, Department of Forest Mensuration and Management, P.O. Box 3013, Morogoro, Tanzania
Ole Martin Bollandsås
Tron Haakon Eid

Norwegian University of Life Sciences, Department of Ecology and Natural Resource Management, P.O. Box 5003, 1432 ?s, Norway

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APA Style

Abel Malyango Masota, Eliakimu Zahabu, Rogers Ernest Malimbwi, Ole Martin Bollandsås, Tron Haakon Eid. (2014). Volume Models for Single Trees in Tropical Rainforests in Tanzania. Journal of Energy and Natural Resources, 3(5), 66-76. https://doi.org/10.11648/j.jenr.20140305.12

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ACS Style

Abel Malyango Masota; Eliakimu Zahabu; Rogers Ernest Malimbwi; Ole Martin Bollandsås; Tron Haakon Eid. Volume Models for Single Trees in Tropical Rainforests in Tanzania. J. Energy Nat. Resour. 2014, 3(5), 66-76. doi: 10.11648/j.jenr.20140305.12

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AMA Style

Abel Malyango Masota, Eliakimu Zahabu, Rogers Ernest Malimbwi, Ole Martin Bollandsås, Tron Haakon Eid. Volume Models for Single Trees in Tropical Rainforests in Tanzania. J Energy Nat Resour. 2014;3(5):66-76. doi: 10.11648/j.jenr.20140305.12

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@article{10.11648/j.jenr.20140305.12,
  author = {Abel Malyango Masota and Eliakimu Zahabu and Rogers Ernest Malimbwi and Ole Martin Bollandsås and Tron Haakon Eid},
  title = {Volume Models for Single Trees in Tropical Rainforests in Tanzania},
  journal = {Journal of Energy and Natural Resources},
  volume = {3},
  number = {5},
  pages = {66-76},
  doi = {10.11648/j.jenr.20140305.12},
  url = {https://doi.org/10.11648/j.jenr.20140305.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jenr.20140305.12},
  abstract = {The present study was the first to develop total tree, stem and branches volume models for rainforests in south-eastern Africa based on destructive sampling. The number of sample trees was 60 and diameter at breast height (dbh) and total tree height (h) ranged from 6 to 117 cm and from 6.4 m to 50 m, respectively. Large parts of the total volume and stem volume variations were explained by the models (Pseudo-R2 ranged from 0.85 to 0.93) and they performed relatively well over different size classes. When considering the challenges in height measurements in rainforests, we in general recommend applying model 3 with dbh only as independent variable. For large trees we recommend model 2 (dbh and h as independent variables) because of the moderating effect h has on volume predictions. If accurate stem volumes are needed for forestry licensing or for calculating compensation of timber loss, we also recommend model 2. As long as the allometry of the trees obviously is not different from that of our study site, the developed models may also be applied for rainforests elsewhere in Tanzania, but further testing of the models is also recommended.},
 year = {2014}
}

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TY  - JOUR
T1  - Volume Models for Single Trees in Tropical Rainforests in Tanzania
AU  - Abel Malyango Masota
AU  - Eliakimu Zahabu
AU  - Rogers Ernest Malimbwi
AU  - Ole Martin Bollandsås
AU  - Tron Haakon Eid
Y1  - 2014/11/10
PY  - 2014
N1  - https://doi.org/10.11648/j.jenr.20140305.12
DO  - 10.11648/j.jenr.20140305.12
T2  - Journal of Energy and Natural Resources
JF  - Journal of Energy and Natural Resources
JO  - Journal of Energy and Natural Resources
SP  - 66
EP  - 76
PB  - Science Publishing Group
SN  - 2330-7404
UR  - https://doi.org/10.11648/j.jenr.20140305.12
AB  - The present study was the first to develop total tree, stem and branches volume models for rainforests in south-eastern Africa based on destructive sampling. The number of sample trees was 60 and diameter at breast height (dbh) and total tree height (h) ranged from 6 to 117 cm and from 6.4 m to 50 m, respectively. Large parts of the total volume and stem volume variations were explained by the models (Pseudo-R2 ranged from 0.85 to 0.93) and they performed relatively well over different size classes. When considering the challenges in height measurements in rainforests, we in general recommend applying model 3 with dbh only as independent variable. For large trees we recommend model 2 (dbh and h as independent variables) because of the moderating effect h has on volume predictions. If accurate stem volumes are needed for forestry licensing or for calculating compensation of timber loss, we also recommend model 2. As long as the allometry of the trees obviously is not different from that of our study site, the developed models may also be applied for rainforests elsewhere in Tanzania, but further testing of the models is also recommended.
VL  - 3
IS  - 5
ER  -

Copy | Download