Evaluation the Reasons of Inattention and I Evaluation ofTecomellaundulata R. stands structure in Bushehr province

Forest structure is one the main environmental factor that produce unique characteristic in forest. Therefore, knowledge of the structure stand can help us to have better and more comprehensive plan for conservation and development of valuable forest resources. In this study, Tecomella undulata stand structure in Bushehr province were investigated.
For this purpose, T. undulata stand in Aliabad area (10 hectares) and Shahinal (2 hectares) was inventory.
Findings: Our result indicated that two studied sites have one layered canopy which resulted from natural and manmade disturbances and also lack of regeneration. Moreover, correlation between collar diameter and tree high reveled that T. undulata stand in Shahnia has wider range compare to Aliabad and contained thicker trees. Also, Mode diameter at breast height, collar diameter, Crown area, spread ratio, width, depth, size and light crown length in Shahnia were more than Aliabad. While the average of height, crown coverage, area, Crown length, thickness index, ratio percentage and Bole ratio, Shahnia had the lowest value compare to Aliabad. Which is exploitation branches and leaves by villager for charcoal, medicinal and animal feed uses.
Discussion & In conclusion, the present study showed that T. undulata stands are one layered pure stands that resulted by thropogenic anthropogenic disturbances. Such disturbances caused elimination of regeneration and formed one layered canopy stands.