Tree diameter distribution of a community forest at Kumpang Langgir, Sri Aman, Sarawak
Tree diameter distribution provides information for forest assessment. Community forest is the forest that were established for the importance of the local community and have research value. However, there are lack of forestry data of community forest at Kumpang Langgir, Sri Aman, Sarawak. The objec...
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| Format: | Final Year Project Report |
| Language: | English |
| Published: |
unimas
2016
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/20842/8/Tree%20diameter%20distribution%20fulltext.pdf http://ir.unimas.my/id/eprint/20842/ |
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| Summary: | Tree diameter distribution provides information for forest assessment. Community forest is the forest that were established for the importance of the local community and have research value. However, there are lack of forestry data of community forest at Kumpang Langgir, Sri Aman, Sarawak. The objective of this study was to determine the diameter distribution of the community forest. Twenty-five plots of 20m x 20m were laid on four different transects over 20 ha study area. Tree diameter at breast height (DBH) of 5 cm and above were measured and identified up to species level. DBH recorded were grouped into classes with interval of 5 cm. Number of family, genus, species and trees for each DBH classes were analysed. Basal area, Importance Value index (IVi) and Morisita’s index were also determined. There were 15 DBH classes recorded. Graph of relationship between number of family, genus, species and stems according to each DBH class shows reverse J-shaped. Indicates that the forest regeneration is healthy. In term of genus, Dipterocarpaceae and Myrtaceae ranked top in 5 different DBH classes each. Graph of total basal area for each DBH class shows skewed to the left bell-shaped pattern. For IVi value, Syzygium antisepticum (Myrtaceae) is the most dominance species in 7 out of 10 DBH class. Myrtaceae species dominated the forest compared with Dipterocarpaceae species. Morisita’s index shows smaller DBH classes (5<10 cm and 10<15 cm) were dispersed randomly and larger DBH classes (15<20 cm and above) were dispersed uniformly |
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