臺東蘇鐵保留區植群調查研究

Study on the Flora of Cycas taitungensis Nature Reserve, Taiwan

本研究為臺東紅葉村臺東蘇鐵保留區之植群調查。保留區內之維管束植物約計有96科229屬293種，其中蕨類植物52種，種子植物241種；最多種類的科為豆科、其次為菊科、禾本科、樟科及大戟科等，主要樹種以陽性至中性樹為主，如青剛櫟、臺灣櫸、楓香、九芎、菲律賓樟等，其中以青剛櫟為最重要的組成。歸群分析結果顯示可區分成9植群型，植群狀態處在演替初期至演替中期階段。因植群組成生育地之環境差異、種子傳播方式等因素，臺東蘇鐵在保留區內成散生或略具群落狀態分布。由環境與重要值之相關分析結果顯示，臺東蘇鐵重要值與相對光度呈正相關，反應其生長所需環境之特性。本研究調查結果，可提供對本保留區經營之參考，並建議臺東蘇鐵保留區設置永久樣區進行長期觀察監測。 The vegetation and flora of Cycas taitungensis Natural Reserve were studied. There are 293 species recorded, and the first 5 families in sequence of the numbers of species presented are Fabaceae, Asteraceae, Poaceae, Lauraceae and Euphorbiaceae. The plant communities are classified into 9 types by matrix cluster analysis. The domination compositive species such as Cyclobalanopsis glauca, Fraxinus formosana. Litsea kostermansii, Liquidambar formosana, etc. are intolerant species, that indicate the community succession is in early to media stage. The environment factores and seed dispersal syndrones do affect the presentation of Cycas taitungensis. The relationship between the important value index of Cycas taitungensis and the relative light is positive. The result indicate that the establishment of permanent plotsis in need for later studies, and appropriate conservation management has been suggest.

The vegetation and flora of Cycas taitungensis Natural Reserve were studied. There are 293 species recorded, and the first 5 families in sequence of the numbers of species presented are Fabaceae, Asteraceae, Poaceae, Lauraceae and Euphorbiaceae. The plant communities are classified into 9 types by matrix cluster analysis. The domination compositive species such as Cyclobalanopsis glauca, Fraxinus formosana. Litsea kostermansii, Liquidambar formosana, etc. are intolerant species, that indicate the community succession is in early to media stage. The environment factores and seed dispersal syndrones do affect the presentation of Cycas taitungensis. The relationship between the important value index of Cycas taitungensis and the relative light is positive. The result indicate that the establishment of permanent plotsis in need for later studies, and appropriate conservation management has been suggest.