Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo
Dipterocarps or Dipterocarpaceae is a commercially important timber producing and dominant keystone tree family in the rain forests of Borneo. Borneo's landscape is changing at an unprecedented rate in recent years which affects this important biodiversity. This paper attempts to model the natu...
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Institute of Forest Science, kangwon National University
2012
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my.ums.eprints.340672022-09-02T00:28:49Z https://eprints.ums.edu.my/id/eprint/34067/ Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo Teo, Stephen Phua, Mui How QK1-474.5 General Including geographical distribution Dipterocarps or Dipterocarpaceae is a commercially important timber producing and dominant keystone tree family in the rain forests of Borneo. Borneo's landscape is changing at an unprecedented rate in recent years which affects this important biodiversity. This paper attempts to model the natural occurrence (distribution including those areas with natural forests before being converted to other land uses as opposed to current distribution) of dipterocarp species in Sarawak which is important for forest biodiversity conservation and management. Local modeling method of Inverse Distance Weighting was compared with commonly used statistical method (Binary Logistic Regression) to build the best natural distribution models for three genera (12 species) of dipterocarps. Database of species occurrence data and pseudoabsence data were constructed and divided into two halves for model building and validation. For logistic regression modeling, climatic, topographical and edaphic parameters were used. Proxy variables were used to represent the parameters which were highly (p>0.75) correlated to avoid over-fitting. The results show that Inverse Distance Weighting produced the best and consistent prediction with an average accuracy of over 80%. This study demonstrates that local interpolation method can be used for the modeling of natural distribution of dipterocarp species. The Inverse Distance Weighted was proven a better method and the possible reasons are discussed. Institute of Forest Science, kangwon National University 2012 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/34067/1/Modeling%20the%20Natural%20Occurrence%20of%20Selected%20Dipterocarp%20Genera%20in%20Sarawak%2C%20Borneo.pdf text en https://eprints.ums.edu.my/id/eprint/34067/2/Modeling%20the%20Natural%20Occurrence%20of%20Selected%20Dipterocarp%20Genera%20in%20Sarawak%2C%20Borneo1.pdf Teo, Stephen and Phua, Mui How (2012) Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo. Journal of Forest Science, 28 (3). pp. 170-178. ISSN 1226-8267 http://koreascience.or.kr/article/JAKO201212656357444.page https://doi.org/10.7747/JFS.2012.28.3.170 |
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QK1-474.5 General Including geographical distribution Teo, Stephen Phua, Mui How Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo |
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Dipterocarps or Dipterocarpaceae is a commercially important timber producing and dominant keystone tree family in the rain forests of Borneo. Borneo's landscape is changing at an unprecedented rate in recent years which affects this important biodiversity. This paper attempts to model the natural occurrence (distribution including those areas with natural forests before being converted to other land uses as opposed to current distribution) of dipterocarp species in Sarawak which is important for forest biodiversity conservation and management. Local modeling method of Inverse Distance Weighting was compared with commonly used statistical method (Binary Logistic Regression) to build the best natural distribution models for three genera (12 species) of dipterocarps. Database of species occurrence data and pseudoabsence data were constructed and divided into two halves for model building and validation. For logistic regression modeling, climatic, topographical and edaphic parameters were used. Proxy variables were used to represent the parameters which were highly (p>0.75) correlated to avoid over-fitting. The results show that Inverse Distance Weighting produced the best and consistent prediction with an average accuracy of over 80%. This study demonstrates that local interpolation method can be used for the modeling of natural distribution of dipterocarp species. The Inverse Distance Weighted was proven a better method and the possible reasons are discussed. |
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Article |
author |
Teo, Stephen Phua, Mui How |
author_facet |
Teo, Stephen Phua, Mui How |
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Teo, Stephen |
title |
Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo |
title_short |
Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo |
title_full |
Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo |
title_fullStr |
Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo |
title_full_unstemmed |
Modeling the Natural Occurrence of Selected Dipterocarp Genera in Sarawak, Borneo |
title_sort |
modeling the natural occurrence of selected dipterocarp genera in sarawak, borneo |
publisher |
Institute of Forest Science, kangwon National University |
publishDate |
2012 |
url |
https://eprints.ums.edu.my/id/eprint/34067/1/Modeling%20the%20Natural%20Occurrence%20of%20Selected%20Dipterocarp%20Genera%20in%20Sarawak%2C%20Borneo.pdf https://eprints.ums.edu.my/id/eprint/34067/2/Modeling%20the%20Natural%20Occurrence%20of%20Selected%20Dipterocarp%20Genera%20in%20Sarawak%2C%20Borneo1.pdf https://eprints.ums.edu.my/id/eprint/34067/ http://koreascience.or.kr/article/JAKO201212656357444.page https://doi.org/10.7747/JFS.2012.28.3.170 |
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13.1944895 |