人工?為森?生態係之一部分，所佔面積達42 萬公頃。鳥?與哺乳動物在森?生態系佔有顯著的角色，且對於棲地環境之變化非常敏感，極適合作為指標生物及保護傘生物?探討環境變動對生物多樣性所造成之影響。因此?解人工?經由疏伐過後森?結構改變對於鳥?與哺乳動物於棲地選擇上的變化的影響，作為人工森?經營管?重要的?考。本計劃並將藉由分析比較物種組成、族群?及棲地關係，探討人工??同疏伐程?，對鳥?與哺乳動物多樣性的影響。本計劃於南投縣信義鄉人??道三個?同疏伐程?（0﹪、25﹪和 50﹪）的?杉人工?棲地中，且在96?九月已完成疏伐作業，進?鳥?與哺乳動物多樣性的監測調查及棲地選擇的研究。本計劃乃承續上一期的計畫所得結果之鳥?與哺乳動物多樣性為基準線，將從97?8月到100?7月，每個月或每季有系統地採集與調查鳥?與哺乳動物。本計畫目的主要將探討?同疏伐處?後的樣區對鳥?與哺乳動物物種多樣性的改變，將分析物種豐富?與物種歧??，並?用多變?分析探討各樣區之棲地結構與物種組成及??變動之關係。預期得到的基本資?將提供台灣中低海拔人工森?棲地物種多樣性資?庫的建?，所得結果並可以作為發展永續長期經營人工?策?的?考。 Man-made forest ecosystem occupied about 420,000 ha in Taiwan. Terrestrial birds and mammals account for the dominant of animal diversity in the forest ecosystem. Moreover, birds and mammals are very sensitive to the conditions of habitats, and therefore they are suitable ecological indicators and as an umbrella species to assess the effects of environmental impacts on biodiversity. Understanding the effects of various strategies for forest restoration on birds and mammals plays a central role in long-term management of man–made forests in Taiwan. The long-term effects of thinning of Taiwan’s plantation forests on the structure of these forests and how changes in this structure affect Taiwan’s birds are not well known. In the Luanda Business Zone 74, Nantou County, we are documenting the effects of two thinning treatments (25% and 50%) of Cryptomeria japonica forest on bird and mammal species richness, density, and diversity. We has conducted the experiments from August 2006 to July 2008, and once each month we didsystematically survey and collected birds and mammals. Changing in bird and mammal diversity during the course of study and among habitat types has been estimated by calculating the species richness and index of diversity (e.g., Shannon-Wiener function). Multivariate analyses also are used to examine the relationships between habitat structures and species diversities. Now, we propose continuing this study for 2008-2011, augmented with analysis of the habitat structure at bird and mammal survey plots and autocamera sites in the two thinning treatments and one controls (non-thinned plantation forest). This study will help us identify how thinning affects different bird and mammal species based on preferred foraging locations. The findings will provide basic information useful for both biodiversity databases of lowland forests in Taiwan, and might be more useful for long-term and sustaining man-made forest management
