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1. Ho Chi Minh City University of Natural Resources and Environment, Ho Chi Minh City 700000, Vietnam
2. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi 100000, Vietnam
3. Nong Lam University, Ho Chi Minh City 700000, Vietnam
4. Southern Institute of Ecology, Vietnam Academy of Science and Technology, Ha Noi 100000, Vietnam


Vietnam is one of the countries with high biological diversity in the world but also greatly influenced by climate change. Therefore, it is necessary to have a solution for sustainable forest management through field surveys in permanent plots to study forest ecology, combining advanced GIS (Geographic Information System) technologies such as Google Earth, Global Mapper, etc. to monitor changes in forest structure and dynamics. The paper is based on the inheritance of the first measurement data in 2012 and directly measures in the second time after 5 years in 2017 at a 10-ha plot with ten 1-ha subplots. The results show that the number of trees is the highest at the diameter class of 10-20 cm (< 20 cm), accounting for about 60% of the total number of trees of each 1-ha sub-plot and the study site and at the height of < 20 m, respectively 8,402 out of 10,261 in 2012 and 8,189 out of 10,013 in 2017 were measured. In addition, the result of this paper indicates that Google Earth software is one of the most effective GIS tools in planning biodiversity conservation strategies and natural resource management.


Forest structure, GIS, permanent plot, Bidoup-Nui Ba.

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