查詢結果分析
來源資料
頁籤選單縮合
題 名 | 應用地理資訊系統監測森林地景變遷之研究=Application of GIS in Monitoring Landscape Change |
---|---|
作 者 | 鄭祈全; 許立達; 賴玉菁; | 書刊名 | 臺灣林業科學 |
卷 期 | 16:1 2001.03[民90.03] |
頁 次 | 頁1-9 |
分類號 | 436.12 |
關鍵詞 | 地景變遷; 地理資訊系統; 監測; 地景指數; Logit模式; Landscape changes; GIS; Monitoring; Landscape indices; Logit models; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以林試所六龜生態系經營區為試區,目的在應用地理資訊系統,結合地景 結構及logit機率模式,探討天然及人為因素對地景結構的影響,以及地景變遷之影響因 子。研究方法係應用數位航測技術製作1988及1996年之各地景類型分布圖,並應用地理資訊 系統計算不同時期之地景結構指數,再以logit機率模式探討不同地點發生地景變遷之機 率。地景結構指數分析結果顯示天然區隔與人為改變對森林地景結構具有明顯之影響。河川 區隔會形成一些形狀較不規則的小區塊。在人為改變方面,闢建道路會使得完整的大區塊被 切割為許多小區塊,而使區塊平均面積大幅變小;人工造林會增加許多異於天然林的區塊, 但由於造林地一般較為規則,因此反而使區塊的平均形狀指數減小。logit機率模式分析結 果顯示影響地景變遷的主要因子包括地形與邊緣效應。一般而言,低海拔、靠近天然林的人 工林,較容易成為天然林。高海拔、坡度較陡及靠近道路的地方則較容易發生裸露、崩塌。 遠離道路、坡度較緩及靠近天然林的裸露崩塌則愈容易恢復為天然林。 |
英文摘要 | This study selected the Liukuei ecosystem management area of the Taiwan Forestry Research Institute as the study area. Geographic information systems (GIS), together with landscape indices and probabilistic logit models, were used to analyze the effects of natural segregation and man-made modifications on the landscape, and also to examine the influential factors of landscape changes. Landscape maps of 1988 and 1996 were derived from aerial photographs using digital photogrammetry. GIS was used to calculate the indices of the landscape structure at different stages. Logit models were then used to examine the probabilities of landscape changes at different locations. The results of landscape analysis indicated that both natural segregation and man-made modifications had significant effects on the landscape structure. Landscape segregated by systems formed several irregularly shaped patches. As to man-made modifications, road building divided large patches into many smaller ones, therefore reducing the average size of patches. Forestation created many heterogeneous patches on the landscape, but because plantations were more regularly shaped, the mean shape index decreased. The results of logit models showed that the major factors affecting landscape changes were topographic effects and edge effects. In general, plantations located at lower elevations and near natural forests were more likely to become natural forests. Bare lands, on the other hand, were more likely to occur at high elevations, on steep slopes, and near roads. Bare lands away from roads, on gentler slopes, and near natural forests were more easily reclaimed by natural forests. |
本系統中英文摘要資訊取自各篇刊載內容。