大甲溪中上游植群之分類與製圖

Vegetation classification and mapping of the middle and upper Tachia watershed

本研究之範圍為大甲溪中上游之集水區，共設置287個樣區（每個400m2），共記錄35, 566筆樣木資料。區內共記錄維管束植物956種，分屬142科468屬，其中147種為稀有植物。樣區資料採階層式的群集分析，配合降趨對應分析（DCA）進行整理，就228個森林樣區上木進行群集分析，分出22個群團；就59個無上木樣區地被物種進行群集分析，分出6個群團。大甲溪中上游植群所分出之28個群團，分別為：台灣二葉松群團、黃杞群團、長葉木薑子群團、狹葉櫟群團、豬腳楠群團、台灣鐵杉群團、台灣冷杉群團、赤柯群團、阿里山千金榆群團、台灣赤楊群團、台灣雲杉群團、香青群團、高山櫟群團、台灣杜鵑群團、長尾尖葉櫧群團、木荷群團、杏葉石櫟群團、台灣華山松群團、栓皮櫟群團、台灣黃杉群團、假長葉楠群團、野核桃群團、玉山箭竹群團、刺柏群團、香青—玉山杜鵑群團、芒群團、台灣高山杜鵑群團、五節芒群團。降趨對應分析顯示海拔高為影響植群分布的主要環境因子。本研究依據「國家植群多樣性調查及製圖計畫」所建構之「台灣植群群系之分類架構」繪製植群圖，供保育與經營之參考。 Vegetation classification and mapping were conducted in the middle and upper Tachia watershed. 287 study plots (400m2 each) were established. Totally 956 taxa of vascular plants, belonging to 142 families and 468 genera, were recorded. There are 147 rare species in this region. Based on hierarchical cluster analysis and detrended correspondence analysis (DCA), 22 alliances of forest vegetation and 6 alliances of grassland vegetation were classified. There are Pinus taiwanensis ALL., Engelhardia roxburghiana ALL., Litsea acuminata ALL., Cyclobalanopsis stenophylloides ALL., Machilus thunbergii ALL., Tsuga chinensis var. formosana ALL., Abies kawakamii ALL., Cyclobalanopsis morii ALL., Carpinus kawakamii ALL., Alnus formosana ALL., Picea morrisonicola ALL., Juniperus squamata ALL., Quercus spinosa ALL., Rhododendron formosanum ALL., Castanopsis cuspidata var. carlesii ALL., Schima superba ALL., Lithocarpus amygdalifolius ALL., Pinus armandii var. masteriana ALL., Quercus variabilis ALL., Pseudotsuga wilsoniana ALL., Machilus japonica ALL., Juglans cathayensis ALL., Yushania niitakayamensis ALL., Juniperus formosana ALL., Juniperus squamata-Rhododendron pseudochrysanthum ALL., Miscanthus sinensis ALL., Rhododendron rubropilosum var. taiwanalpinum ALL., and Miscanthus floridulus ALL. According to DCA, the most important environmental factor which influences vegetation distribution is altitude. Vegetation mapping of the middle and upper Tachia watershed was made following vegetation classification system for Taiwan.

Vegetation classification and mapping were conducted in the middle and upper Tachia watershed. 287 study plots (400m2 each) were established. Totally 956 taxa of vascular plants, belonging to 142 families and 468 genera, were recorded. There are 147 rare species in this region. Based on hierarchical cluster analysis and detrended correspondence analysis (DCA), 22 alliances of forest vegetation and 6 alliances of grassland vegetation were classified. There are Pinus taiwanensis ALL., Engelhardia roxburghiana ALL., Litsea acuminata ALL., Cyclobalanopsis stenophylloides ALL., Machilus thunbergii ALL., Tsuga chinensis var. formosana ALL., Abies kawakamii ALL., Cyclobalanopsis morii ALL., Carpinus kawakamii ALL., Alnus formosana ALL., Picea morrisonicola ALL., Juniperus squamata ALL., Quercus spinosa ALL., Rhododendron formosanum ALL., Castanopsis cuspidata var. carlesii ALL., Schima superba ALL., Lithocarpus amygdalifolius ALL., Pinus armandii var. masteriana ALL., Quercus variabilis ALL., Pseudotsuga wilsoniana ALL., Machilus japonica ALL., Juglans cathayensis ALL., Yushania niitakayamensis ALL., Juniperus formosana ALL., Juniperus squamata-Rhododendron pseudochrysanthum ALL., Miscanthus sinensis ALL., Rhododendron rubropilosum var. taiwanalpinum ALL., and Miscanthus floridulus ALL. According to DCA, the most important environmental factor which influences vegetation distribution is altitude. Vegetation mapping of the middle and upper Tachia watershed was made following vegetation classification system for Taiwan.