Studies on the Vegetation of Hershueishi and Chuengushi Watersheds

• Main Authors: Chun-Chung Chen, 陳宗駿
• Other Authors: 陳明義
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/16853285153960220135

碩士 === 國立中興大學 === 生命科學系所 === 94 === There is natural and diverse vegetation in two neighbor watersheds of Hershueishi and Chuengushi in central Taiwan. The vegetation of these areas was investigated, classified and mapped. 59 plots of 400m2 were set up, and all overstory trees (DBH≧1cm), ground vegetation and epiphytes were recorded. 3 alliances and 7 associations were classified based on TWINSPAN and DCA analyses. There are：(I) Michelia compressa ALL.：includes Viburnum arboricolum－Machilus japonica ASS., Meliosma callicarpifolia－Castanopsis cuspidata var. carlesii ASS., and Tricalysia dubia－Cyclobalanopsis longinux ASS.；(II) Pasania hancei var ternaticupula ALL.：includes Alnus formosana－Pasania hancei var ternaticupula ASS., and Pinus taiwanensis－Quercus variabilis ASS.；(III) Turpinia formosana ALL.：includes Lithocarpus castanopsisifolius－Turpinia formosana ASS., and Phoebe formosana－Turpinia formosana ASS. DCA results reveal that elevation is the major environmental factor affecting vegetation variation. Totally 861 species, belonging to 151 families and 439 genera, were recorded in those areas. Among them, 147 species are endemic plants in Taiwan, and 20 species are rare ones that have to be strictly protected. Rare species are Macrothelypteris ornate, Cytomium taiwanianum, Asplenium obscurum, Taxus sumatrana, Cephalotaxus wilsoniana, Podocarpus fasciculus, Camellia sinensis f. formosensis, Dysosma pleiantha, Eustigma oblongifolium, Corylopsis pauciflora, Photinia lasiopetala, Rhododendron ovatum var. ovatum, Prunus taiwaniana, Prunus transarisanensis, Ormosia formosana, Aralia cordata, Lonicera apodantha, Symplocos juiyenensis, Alyxia taiwanensis, and Luisia teres. Families with diverse woody species include Lauraceae, Fagaceae, Theaceae, Rosaceae, and Symplocaceae；those with diverse herb species include Orchidaceae, Dryopteridaceae, Polypodiaceae, Asteraceae, and Rosaceae. Vegetation classification and mapping of this study provide references for conservation and sustainable management of these watersheds. It is suggested to keep there areas in natural state for maintaining biodiversity.