台中大坑地區植群調查研究

Vegetation Ecology at Dakeng Area, Taichung

臺灣低海拔地區開發較早，原始植群遭受較嚴重破壞，台中大坑地區是少數臺灣西部低海拔保有較自然森林的地區。研究區總面積約4, 020ha，海拔高介於137-859m之間，主要為低海拔之丘陵地區，屬於熱帶濕潤氣候。研究區範圍內共紀錄125科331屬501種維管束植物，包括61種臺灣特有種，32種稀有植物，歸化種比例超過10%。共計調查97個樣區（25m×10m），經群團分析結果（依優勢種命名），區分為石櫟－柏拉木型、桂竹－麻竹型、小西氏石櫟－山紅柿型、臺灣櫸－月橘型、楓香－燈稱花型、大葉桃花心木－柑橘型、山黃麻－長梗紫苧麻型、血桐－構樹型與相思樹–龍眼型等9個森林植群型及五節芒型之草本植群型；並針對各植群型之主要組成樹種進行族群結構之分析。 Dakeng area preserves more natural forest in low-land of Taiwan, although, original vegetation of low-altitude areas are almost destroyed. The study area is about 4,020 ha at 139-859 m elevation. In order to investigate the compositions of plants and vegetations, 97 sampling plots (25 m × 10 m) had been set up. Total of 501 species belonging to 331 genera and 125 families were recorded, with 61 endemic species, 32 rare species and more than 10% of naturalized plants. According the result of cluster analysis, the plant communities could be classified into 10 vegetation types with the name of their dominate species respectively as following: Pasania glabra-Blastus cochinchinensis type; Phyllostachys makinoi-Dendrocalamus latiflorus type; Pasania konishii-Diospyros morrisiana type; Zelkova serrata-Murraya paniculata type; Liquidambar formosana-Ilex asprell type; Swietenia macrophylla-Citrus ponki type; Trema orientalis-Oreocnide pedunculata type; Macaranga tanarius-Broussonetia papyrifera type; Acacia confusa-Euphoria longana type and Miscanthus floridulus type. Population structure analysis of dominate tree for each vegetation type was also carried out.

Dakeng area preserves more natural forest in low-land of Taiwan, although, original vegetation of low-altitude areas are almost destroyed. The study area is about 4,020 ha at 139-859 m elevation. In order to investigate the compositions of plants and vegetations, 97 sampling plots (25 m × 10 m) had been set up. Total of 501 species belonging to 331 genera and 125 families were recorded, with 61 endemic species, 32 rare species and more than 10% of naturalized plants. According the result of cluster analysis, the plant communities could be classified into 10 vegetation types with the name of their dominate species respectively as following: Pasania glabra-Blastus cochinchinensis type; Phyllostachys makinoi-Dendrocalamus latiflorus type; Pasania konishii-Diospyros morrisiana type; Zelkova serrata-Murraya paniculata type; Liquidambar formosana-Ilex asprell type; Swietenia macrophylla-Citrus ponki type; Trema orientalis-Oreocnide pedunculata type; Macaranga tanarius-Broussonetia papyrifera type; Acacia confusa-Euphoria longana type and Miscanthus floridulus type. Population structure analysis of dominate tree for each vegetation type was also carried out.