和平溪流域植群分類之研究

Vegetation classification of the He-ping river basin

本研究針對和平溪流域進行植群調查，透過調查樣區資料與相關文獻整理提出和平溪流域植群之分類方案，分析以文獻樣區加上新設樣區共275個樣區及1,101種植物來進行降趨對應分析及雙向指標種分析，分析結果共分出26個植群型，再經列表整理與文獻比較後可歸納為20個群團及29個群叢，其中帶狀植群有8個群團及14個群叢，分別為：大葉楠群團（1個群叢）、山紅柿群團（2個群叢）、大葉石櫟－假長葉楠群團（2個群叢）、臺灣水青岡群團（1個群叢）、臺灣扁柏群團（3個群叢）、臺灣鐵杉群團（1個群叢）、臺灣冷杉群團（2個群叢）與香青群團（2個群叢）；非帶狀植群有12個群團及15個群叢，分別為：馬鞍藤群團（1個群叢）、臺灣蘆竹群團（1個群叢）、甜根子草群團（1個群叢）、南湖柳葉菜群團（1個群叢）、草海桐群團（1個群叢）、玉山箭竹群團（2個群叢）、木麻黃群團（1個人工林型）、楓香群團（2個人工林型）、臺灣赤楊群團（2個群叢）、太魯閣櫟群團（1個群叢）、臺灣杜鵑群團（1個群叢）與臺灣二葉松群團（1個群叢）。結果顯示帶狀植群主要的影響因子為海拔、含石率及地形指數；而非帶狀植群則為海拔、地形指數及坡向。

The vegetation surveys were conducted in the He-ping river basin. A total of 275 plots and 1,101 species data were collected. The analysis of this study used Detrended Correspondence Analysis (DCA) and Two-Way Indicator Species Analysis (TWINSPAN). The results of the analysis were then cross referenced with literatures for classification vegetation scheme. There were 8 alliances and 14 associations in the zonal vegetation: Machilus japonica var. kusanoi alliance which including Glycosmis citrifolia - Dendrocnide meyeniana association; Diospyros morrisiana alliance including Turpinia ternata - Castanopsis cuspidata var. carlesii association and Quercus longinux - Dryopteris sparsa association; Lithocarpus kawakamii - Machilus japonica alliance including Symplocos wikstroemiifolia - Machilus thunbergii association and Arachniodes rhomboides - Chamaecyparis formosensis association; Fagus hayatae alliance including Fagus hayatae association; Chamaecyparis obtusa var. formosana alliance including Schefflera taiwaniana - Chamaecyparis formosensis association, Rhododendron formosanum - Chamaecyparis obtusa var. formosana association and Tsuga chinensis var. formosana - Chamaecyparis obtusa var. formosana association; Tsuga chinensis var. formosana alliance including Yushania niitakayamensis - Tsuga chinensis var. formosana association; Abies kawakamii alliance including Tsuga chinensis var. formosana - Abies kawakamii association and Yushania niitakayamensis - Abies kawakamii association; Juniperus squamata alliance including Abies kawakamii - Juniperus squamata association and Geranium hayatanum - Juniperus squamata association. And there were 12 alliances and 15 associations in the azonal vegetation: Ipomoea pescaprae subsp. brasiliensis alliance including Wedelia prostrata - Ipomoea pescaprae subsp. brasiliensis association; Arundo formosana alliance including Eupatorium hualienense - Arundo formosana association; Saccharum spontaneum alliance including Saccharum spontaneum association; Epilobium nankotaizanense alliance including Epilobium nankotaizanense association; Scaevola taccada alliance including Scaevola taccada association; Yushania niitakayamensis alliance including Yushania niitakayamensis association and Veratrum formosanum - Yushania niitakayamensis association; Cocculus orbiculatus alliance including Cocculus orbiculatus plantation forest type; Liquidambar formosana alliance including Zelkova serrata - Liquidambar formosana plantation forest type and Cinnamomum camphora - Liquidambar formosana plantation forest type; Alnus formosana alliance including Melanolepis multiglandulosa - Alnus formosana association and Alnus formosana association; Quercus tarokoensis alliance including Quercus tarokoensis association; Rhododendron formosanum alliance including Rhododendron formosanum association; Pinus taiwanensis alliance including Pinus taiwanensis association. The results of DCA showed that altitude, rate of stone and topographic position were important factors that contributed to the variation of vegetation scheme in He-ping river basin.