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Assessing the Population Status of a Tree Species Using Distance Sampling : Aquilaria crassna (Thymelaeaceae) in Northern Laos
Joint Authors
Source
International Journal of Forestry Research
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-01-19
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Lack of reliable and accurate field data affect assessments of population status of tree species, especially tropical taxa with broad distributions.
Use of distance sampling techniques may help to overcome the problem.
This paper describes a method for estimation of absolute density of a rare tree species with scattered and clumped distribution, using line transect distance sampling.
The method was applied to previously harvested populations of Aquilaria crassna Pierre ex H.
Lec.
(Thymelaeaceae) at four sites in Northern Laos.
This species is destructively harvested to yield agarwood, probably the world’s most valuable nontimber forest product and categorised as ”critically endangered“.
The average density of felled A.
crassna trees at the four sites was 2.2 ha−1, indicating that harvesting has been extensive.
However, the estimated densities of living saplings, 10.9 ha−1, small trees (DBH < 10 cm), 10.6 ha−1, and larger trees (DBH ≥ 10 cm), 1.7 ha−1, suggest that populations are not wiped flat.
The survey method should stand a good chance of wider use as a tool in management and conservation of a wide range of tree species.
Results of the present case study could suggest that the conservation status of A.
crassna should be re-categorised.
American Psychological Association (APA)
Jensen, Anders& Meilby, Henrik. 2012. Assessing the Population Status of a Tree Species Using Distance Sampling : Aquilaria crassna (Thymelaeaceae) in Northern Laos. International Journal of Forestry Research،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-458769
Modern Language Association (MLA)
Jensen, Anders& Meilby, Henrik. Assessing the Population Status of a Tree Species Using Distance Sampling : Aquilaria crassna (Thymelaeaceae) in Northern Laos. International Journal of Forestry Research No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-458769
American Medical Association (AMA)
Jensen, Anders& Meilby, Henrik. Assessing the Population Status of a Tree Species Using Distance Sampling : Aquilaria crassna (Thymelaeaceae) in Northern Laos. International Journal of Forestry Research. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-458769
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-458769