臺灣中部亞熱帶山地森林地棲脊椎動物的群落結構－－兼論攔截籬掉落桶研究法的應用

Community Structure of Ground-Dwelling Vertebrates Sampled with Drift-Fence Pitfall Traps in a Subtropical Montane Forest in Central Taiwan

本文研究臺灣中部亞熱帶山地森林底層脊椎動物的群落，利用攔截籬掉落桶（drift-fencepitfall traps），自1995年8月至1997年5月於南投縣鹿谷鄉的鳳凰谷鳥園進行調查。調查結果一共有18種脊椎動物，包括4種哺乳類、4種蜥蜴、9種兩棲類和1種鳥類。該群落的相對數量分布模式近似對數常態分布，亦即群落的動物數量由少數幾種為主，其餘的種類數量皆不多。森林內4種微棲地（竹林、人造針葉樹林、天然林、草生地）下動物的種類和數量有顯著的差異，即使一樣是竹林的兩個微棲地的脊椎動物群落也不相同。此外，桶中亦捕得大量的無脊椎動物。我們提出一個使用攔截籬掉落桶研究法進行生物多樣性調查的操作程序和建議，俾使研究工作兼顧動物保護的準則。 We studied the community structure of ground-dwelling vertebrates, using drift-fence pitfalltraps, in a subtropical montane forest in the Fong-Huang-Ku Bird Park, Nantou, in the centralpart of Taiwan, from August 1995 to May 1997. A total 18 species of vertebrates werecaptured, including four species of mammals, four species of lizards, nine species ofamphibians and one species of bird. The relative abundance of the species showed a lognormaldistribution, suggesting that the vertebrate community was dominated by a few species of highabundance.Significant differences in community structure were found among fourmicrohabitats (bamboo grove, conifer plantation, natural forest, and open grass-land). Evenunder the similar physiognomy between two bamboo groves, their species composition andrelative abundance were significantly different. We propose a protocol for using the drift-fencepitfall traps in biodiversity studies to comply with the requirement of animal use ethic codes.