The biodiversity and complexities of natural tropical forests are known as the lives that depend on each other within ecosystems, species and genetics. Thus, the tropical forests provide variety of products and services for human over century and play disproportionally important role in the global carbon cycle and biodiversity conservation. However, forest fragmentation results because the spatial scales of resource extraction do not match the scales of natural disturbance that shaped the evolution of the landscape. This is because until the 1990s many tropical countries had no recent published, or stated, sustainable forest management; and also a stated yield or stock may not correspond to a government’s actual forest management plan, i.e. its true attitude and intentions. Assessment of sustainability however, is often lacking or incomplete at the time a system is adopted.
To manage forests to achieve sustainable productive capacity for future generation have not also enough but Southeast Asian countries cut forests illegally. Therefore, strategic implementation on the uses of forest products should then be carefully considered. Strategic management planning according to available natural potential capacities should also evaluate with caution because natural stand structure will change after disturbances resulting in extend the rotation lengths. Maintenance of productive capacity is one of the most important criteria for sustainable forest management, but very little is known about productive capacity of tropical seasonal forests in mainland Southeast Asia, such as those in Cambodia, but there have been lack of scientific evaluations of them.
This dissertation would be an important report for production forest management of ECE/FAO, which it is not available yet in this country and especially in the tropics of Main Land of Southeast Asia. The results of this study would be successful experimental indicators before they will be approved to go in to effect for harvesting.
In order to ensure sustainable uses of forests for long-term uses as mentioned in the ECE/FAO, there are urgent needs to know the potential capacity and its dynamics of natural tropical forests, which are very important information for managers to make plan and to decide rotation lengths for next harvestings. The below objectives would serve a framework within criteria 2 and indicators of Montréal Process in 2007 presented in Fig. 1 and Fig. 2. This dissertation aims at (1) assessing stand dynamics and structure of natural seasonal tropical forests (2) planning procedures and (3) selecting appropriate methods for estimating annual allowable cut at a suitable rotation length.