Vegetation Ecology of Dan-da Region

• Main Authors: Kuo-Ming Fu, 傅國銘
• Other Authors: 歐辰雄
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/23886610157141030814

碩士 === 國立中興大學 === 森林學系 === 90 === Dan-da region, the largest Wildlife Protection Habitat in the central part of Taiwan, covers an area of 42,282.77 ha, with elevations ranging from 521 to 3,106 meters. Its climate belongs to sub-tropic, warm-temperate and cool-temperate zones. The objectives of this study were to inventory plant species, perform vegetation analysis and set up permanent quadrant plots for future monitoring. This study established a total of 76 sample plots, including 8 permanent quadrant plots. The inventory of vascular plant found 154 families, 489 genera, 858 species among which 31 species are rare. According to the matrix cluster analysis (MCA), the vegetation can be classified into the following types：2 montane grass types (Pinus taiwanensis－Pieris taiwanensis－Juniperus formosana var. formosansa－Rhododendron rubropilosum association, Miscanthus transmorrisonensis－Pteridium aquilinumn ssp. Wightianum association) and 16 forest types：(A) Abies kawakamii－Tsuga chinensis type, (A1) Abies kawakamii－Tsuga chinensis subtype, (A2) Tsuga chinensi－Chamaecyparis obtusa var. formosana subtype, (B) Picea morrisonicola－Chamaecyparis obtusa var. formosana type, (C) Cyclobalanopsis stenophylloides－Pasania hancei type, (D) Cunninghamia lanceolata var. konishii－Cinnamomum insularimontanum type, (E) Schefflera octophylla－Acer morrisonense type, (F) Machilus japonic－Chamaecyparis formosensis type, (G) Castanopsis calesii type, (G1) Rhododendron ellipticum subtype, (G2) Castanopsis calesii－Rhododendron ellipticum subtype, (G3) Cyclobalanopsis morri－Neolitsea accuminatissima subtype, (H) Rhododendron formosana type, (I) Machilus thunbergii－Lithocarpus amygdalifolius－Michelia compressa type, (J) Cyclobalanopsis glauca－Pistacia chinensis－Zelkova serrata type, (K) Acacia confusa type, (L) Macaranga tanarius－Trema orientalis type, (M) Pinus taiwanensis－Alnus joponica type, (N) Alnus japonica type, (O) Platycarya strobilacea type, and (P) Quercus variabilis type. In species diversity analysis, the four indices of diversity show apparent difference in forest types of every zone. Most forest types had the evenness indices between 0.6 and 0.8, suggesting this area very suitable for plant growth. The investigation and monitoring of two burned forest types found that the fire-caused mortality of woody plant was low (4.84 % and 14.56 %). Most broad-leaved trees can regenerate by sprouting, while Miscanthus spp. recovered well three months after the fire and returned to its previous coverage in one year. The results also show that each forest type has its specific disturbance factors and regeneration mechanisms to maintain mosaic dynamic balance. The dynamic of the special fire-adapted grassland type in this study depends on the occurrence and cycles of the fires. The grassland type would be replaced by the neighboring forest types, if the fire factor were eliminated.