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結合航測資訊與地景指數探討南仁山生態保護區之干擾因子

Using Areial Photos Data and Shannon Diversity Index to Study on the Disturbed Factors of the Nanjenshan Ecological Rreserve

摘要


生態體系真有動態變化之特性,因此了解其變遷過程以制定適當的保育政策,為維持整個生態系統生物多樣性的基礎;然森林生態系係由林中之動物、植物及其生存之環境所共同組成,故其發展自必有干擾因子存在,而探討此等干擾因子之作用程度與影響範圍,又當為研究森林生態系變遷及經營管理所不容忽視之重要課題。本研究首先整理前人研究結果與現場調查資料以研判影響南仁山生態保護區植群社會發展之機制;次將南仁山區域1976、1989、1997三年度航空照片判釋、分類、數化、建檔後,以Shannon多樣性指數探究各影響機制干擾區與非干擾區之地景生態系統變化,並藉由t測驗檢定其間差異;最後由檢測結果探討該保護區經營管理之相關課題。研究結果顯示,水份因子、東北季風等自然因素,以及道路開發、人工造林、邊緣效應等人為因素,均確實為影響南仁山生態保護區植群社會發展之機制,而由地景變遷之t檢定結果顯示,保護區之成立對於不同干擾因子之效用並不相同。就經營管理面而言,影響其生態體系發展的天然因素長久以來便已存在,當可視為一恆定之常態因素,故其因應之道僅需避免對脆弱地帶造成破壞即可;而人為干擾則需視干擾程度與影響範圍之不同分別研擬經營策略。

並列摘要


A dynamic ecosystem is compose of animal, plant, and environment. In order to keep the biodiversity and make the strategy of management, it is essential for understanding vegetation succession. In a dynamic ecosystem, there are many disturbed factors, so to know where and how they work is the most important thing for understanding vegetation succession.In this study, disturbed factors of vegetation society are decided by references and survey data, land cover types at Nanjenshan ecological reserve were interpreted from aerial photos of 1976, 1989, and 1997. Those classified digital data were used to derive Shannon diversity index for mining the dynamics change of landscape ecosystem in different disturbed factor. T-test was applied to detect the landscape differentiability between every two periods.Results of this study show that the moisture, northeaster monsoon, road establishment, afforestation, and human exploitation are actually the disturbed factors of vegetation society. The Nanjenshan ecological reserve is effective in tending to a stable high-density forest vegetation society, but the administrative department should make proper starages for the distubed factors individually.

被引用紀錄


陳芷儀(2011)。以數位航測探討南仁山地區森林孔隙動態變化〔碩士論文,國立屏東科技大學〕。華藝線上圖書館。https://doi.org/10.6346%2fNPUST.2011.00210
阮筱雯(2005)。航遙測技術於棲蘭山檜木老林分類之研究〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342%2fNTU.2005.02448
薛怡珍(2005)。地景動態變遷預測模式之研究-以台大實驗林和社地區為例〔博士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342%2fNTU.2005.00538
吳治達(2004)。民墾地之地景變遷監測研究〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342%2fNTU.2004.00502

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