瑞岩溪自然保護區植群之研究

Abstract

為保護臺灣中高海拔區域代表性之生態系以及珍稀之生物種，林務局擬設 立瑞岩溪自然保護區。本保護區位於南投縣仁愛鄉，包含南投林區管理處 埔里事業區第 132至 135林班，總面積約1450公頃，海拔高度自1210公尺 至 3416公尺，植物資源相當豐富。在本區調查到的維管束植物有 142科 412屬 718種，經歸群分析，可分為五大群團，分別是：Ⅰ、冷杉林帶； Ⅱ、臺灣赤楊林；Ⅲ、鐵杉林帶；Ⅳ、櫟林帶；Ⅴ、高山灌叢與草生地。 其中，櫟林帶又可分為五個林型：A.香楠－山肉桂林型；B.鬼櫟－臺灣山 香圓林型；C.卡氏櫧－森氏櫟－木荷林型；D.臺灣紅豆杉－狹葉高山櫟－ 雲葉林型；E.紅檜－鐵杉林型。區內發現多種稀有植物，如能高灰木、 白八角金盤、柳氏懸鉤子等。臺灣紅豆杉與威氏粗榧為櫟林帶中珍稀特徵 種，其族群年齡結構呈不連續現象，族群的建立與棲地微環境有關。野火 為針葉林中之重要干擾因子，對針葉林之族群動態與更新具重大影響。本 文最後列舉保護區目前所面臨的問題，並提出對策與建議，以供保育之參 考。

For preserving the representative ecosystem and the rare species in central Taiwan, the Taiwan Forest Bureaus plans to set up Zueyenshi Nature Reserve. It locates at Nan-Tou Hsein and includes the 132 to 135 compartments of Puli Forest District. Elevation ranges from 1210m to 3416m and total area is about 1450 hectares. There is rich plant resource in this reserve. Totally 718 taxa, belonging to 142 families and 412 genera were found. Based on cluster analysis, 5 zone could be identified, including fir forest zone, alder forest, hemlock forest zone, oak forest zone, and alpine scrub and grassland. Oak forest zone could be subdivided into 5 forest types, namely Machilus zuihoensis- Cinnamomum insularimontamum type , Lithocarpus lepidocarpus- Turpinia formosana type, Castanopsis carlesii- Cyclobalanopsis morii-Schima superba type , Taxus mairei-Cyclobalanopsis stenophylla-Trochodendron aralioides type, and Chamaecyparis formosensis-Tsuga chinensis type. Several rare species were found in thisreserve, such as Symplocos nokoensis, Sinopanax formosana and Rubus liui. Taxus mairei and Cephalotaxus wilsoniana are two precious and characteristic tree species. The age structures of these two populations are not continuous. The establishments of those two populations were closely related to the microenvironment of the habitat. Wildfires played important role in the population dynamics and regeneration of the coniferous forests. For protecting this reserve, some strategies have to be conducted.