物種入侵問題近年來已成為國內外極重視的研究課題。本研究旨在從「空間格局」的角度，探討物種入侵擴散之過程與機制，並根據入侵擴散之空間格局，判定重要的策略點，進而提出因應措施。研究對象與地區，則以目前國內銀合歡入侵擴散甚為嚴重且地形環境不太相同之澎湖群島和恆春半島為例，除了分析該二地區入侵擴散之過程與機制之外，並評估其差異性、空間格局類型及因應措施。本研究擬以二年時間執行此項計畫，第一年計畫以澎湖地區銀合歡入侵之空間格局研究為主，已獲國科會補助。本年度申請第二年計畫，係以恆春地區銀合歡為主，內容包括二部份，第一部份是「恆春地區銀合歡入侵擴散之空間格局研究」，項目包括銀合歡地理資訊系統建置；銀合歡空間分布分析；銀合歡地景多樣性變遷分析；銀合歡入侵擴散之策略點判定與劃設；第二部份是「恆春與澎湖二地區銀合歡入侵擴散之比較」，項目包括評估澎湖和恆春二地區銀合歡入侵擴散之差異性及其空間格局類型，並提出因應措施。本研究預期效益為驗證應用「空間格局」監測銀合歡入侵擴散之過程與機制，並評估澎湖和恆春二地區銀合歡入侵擴散之差異性及其空間格局類型，進而提出因應措施，提供國內有關單位處理銀合歡入侵擴散之參考。
e issue of species invasion has been growing concern recently. The objective of this study is to investigate the process and mechanism of species invasion from the point of “spatial pattern”, and also to determine the strategic points and provide the alternatives based on the invaded spatial pattern of Leucaena leucocephala. The study sites are located at Penhu and Henchun area where Leucaena leucocephala has caused the serious impact on these two different terrain sites. Therefore, in addition to analyzing the process and mechanism of species invasion, the invasion difference, spatial pattern types, and the proposed alternatives at these two sites are also evaluated. This study is expected to achieve the goal in two years. The first year project (from 2010/8/1 to 2011/7/31) has been sponsored by the National Science Council and the subject aims at Penhu’s Leucaena leucocephala. This application is for the second year project. The subject aims at Henchuan’s Leucaena leucocephala and includes two parts. The first part focuses on interpreting and generating the spatial distribution map of Henchuan’s Leucaena leucocephala; applying landscape indices on the analysis of spatial pattern and landscape change; analyzing the spatial pattern of invasion and dispersal; determining the important strategic points of invasion and dispersal; and proposing alternatives. The second part focuses on assessing Penhu’s and Henchuan’s Leucaena leucocephala on the invasion differences and spatial pattern types, and also the proposed alternatives. The expected results from this study are (1) to identify the feasibility of ‘spatial pattern’ concept on monitoring the invasion and dispersal of Leucaena leucocephala; (2) to assess the invasion difference and spatial pattern types between two research sites; (3) to propose feasible alternatives to the related units which have to deal with the issue of invasion and dispersal of Leucaena leucocephalal.
