Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/65833
標題: 七家灣溪濱岸植群監測與地景變遷
Riparian Vegetation Monitoring and Landscape Change of Chichiawan Stream
作者: 徐憲生
Shu, Hsien-Sheng
關鍵字: riparian vegetation
濱岸植群
landscape change
Chichiawan stream
vegetation monitoring
land use.
地景變遷
七家灣溪
植群監測
土地利用
出版社: 森林學系所
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摘要: 本研究為瞭解濱岸植群之組成、結構變化與地景變遷,於七家灣溪主河段、桃山西溪、桃山北溪、高山溪及有勝溪濱岸,設立30個植群監測樣區,共記錄維管束植物95科209屬335種,依據矩陣群團分析可區分為7型:高山藤繡球-臺灣赤楊型;蓪草-臺灣紫珠型;屏東木薑子型;臺灣二葉松-大頭茶型;栓皮櫟-臺灣二葉松型;臺灣二葉松-臺灣赤楊型及臺灣赤楊型。在物種豐富度分析顯示,喬木層植物歧異度差異大,推測與季節性洪水之干擾與局部地形差異所造成之空間異質性所致;而地被層植物歧異度與均勻度均頗高,但彼此差異不大,僅以8月濕季略高於2月乾季。 將1995及2006年之兩期各土地利用型整合為6類,運用馬可夫模式探討土地利用變遷,結果顯示土地利用以維持原來土地類型為主,維持率由高至低依序為臺灣二葉松、紅檜-鐵杉、果菜園、臺灣黃杉、臺灣胡桃及臺灣赤楊類型,其各土地利用類型之面積變異小,空間分布卻有明顯變化,主要是受到崩塌、洪水、保護區成立及造林政策影響所致。
In order to realize the change of the composition, structure of the riparian vegetation and landscape change, 30 plots were set, near by the riparian surveying stations in the major segment of Chichiawan stream, Taoshang western stream, Taoshang northern stream, Kaoshang stream and Yosheng stream. The results revealed that 95 families, 209 genera and 335 species of vascular plants recorded. The vegetation in this area could be distinguished into 7 types by the matrix cluster analysis (MCA). They were: Hydrangea aspera - Alnus formosana Type, Tetrapanax papyriferus - Callicarpa formosana Type, Litsea akoensis Type, Pinus taiwanensis - Gordonia axillaris Type, Quercus variabilis - Pinus taiwanensis Type, Pinus taiwanensis - Alnus formosana Type and Alnus formosana Type.In species abundance analysis, the tree and ground strata with the habitat environment were evaluated. It was found that the difference of the divergence of the the tree stratum was greater. That's supposed to be caused by the spatial heterogeneity from the disturbance of the seasonal flood and the difference of local topography. There was little difference in the divergence and the uniformity of the ground stratum, then August (wet season) was higher than February (drought season), and both of them were pretty high. Combining the inventory in 1995 and 2006 into 6 land use types and using the Markov chain to discuss the change in land use, it revealed that most land use types were maintained. The higher to lower in the maintained rate were Pinus taiwanensis Type, Chamaecyparis formosensis -Tsuga chinensis Type, fruit-and-vegetable farm Type, Pseudotsuga wilsoniana Type, Juglans cathayensis Type and Alnus formosana Type in order. The variance among the areas of all land use types is smaller, but it varied obviously in the spatial distribution. This was affected by collapse, flood, setting up the conservation area and the plan of reforestation policy.
URI: http://hdl.handle.net/11455/65833
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0507200613280400
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