Forest Dynamics and Tree Distribution Patterns in Dry Evergreen Forest, Northeastern, Thailand

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Wongsatorn Phumphuang Dokrak Marod Sarawood Sungkaew Sathid Thinkampaeng


Deforestation based on anthropogenic activities is the main cause of biological diversity loss. This study clarified forest dynamics after intermediate disturbances and detected the tree distribution pattern in a dry evergreen forest (DEF). A 1 hectare (ha) permanent plot was set up in a lowland DEF in 2002 and all trees with a diameter at breast height (DBH) larger than 4.5 cm were tagged, measured and identified. Tree monitoring was done in 2009 and 2016. In addition, the permanent plot was expanded to 3 ha, for studying the tree distribution pattern and all trees with DBH greater than 2 cm were included and their coordinates also recorded during 2016. The forest dynamics during 2002 to 2016 showed the net recruitment rate was higher than the mortality rate (2.58 and 2.35 %/year, respectively); however, it varied among periods. The mortality rate in the second period (2009-2016) was greater than in the first period (2002-2009), with rates of 4.71 and 2.64 %/year, respectively, due to disastrous flooding in 2003. A clumped distribution pattern based on the Morisita index was detected for all selected species, indicating habitat heterogeneity in which the physical environments were patched and induced the clumped distribution.


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Phumphuang, W., Marod, D., Sungkaew, S., & Thinkampaeng, S. (2018). Forest Dynamics and Tree Distribution Patterns in Dry Evergreen Forest, Northeastern, Thailand. Environment and Natural Resources Journal, 16(2), 58-67. Retrieved from
Original Research Articles


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