0023-6152

AA00697606

7169362

This research surveyed a continuation of “Forest Management Planning” and provided ecological data for forest thinning area establishment of the plantation (Taiwan Forest Bureau, 1995 and 2016). About 30 ha area from the total 241.1 ha of Alishan Forest Working Circle Compartment No. 141 was selected as a coverage of Forest Management Planning to conduct stand survey and record ecological data about fauna and flora before and after forest thinning. It was a state-owned forest owned and provided the Forestry and Nature Conservation Agency (FANCA) in Taiwan. The forest thinning planning area was 3.0 ha sample region. Regression calculation was conducted based on varieties of trees, diameter at breast height (DBH), tree height, timber volume, crown the projection area, and other stand performance parameters from ground survey (gcpa) and air sample region data (acpa). Regression results indicated that a smaller sampling error was a better representative of the sampling population. The estimation of the timber volume of the stand showed a similar trend. Based on the flora sources, there were 2 types of bryophytes. A total of 349 species of vascular plants belonged to 252 genera and 102 families, among which there were 281 natives, 47 naturalized, and 21 cultivated species. According to the fauna survey, at least 18 wild mammal species belonged to 6 orders and 11 families, and at least 7 chiropteran animal species belong to 3 families. Forest thinning positively affected the number of birds and insect species in the forest’s canopy layer. Birds foraging in the lower layer of the forest might be attracted to forage in the canopy layer due to an increase in the insect number in the ground layer after the thinning. It increased the birds’ variety and the variety of insect changes was due to new habitat types formed after thinning and changes in ethnic structure among species.