關刀溪長期生態試驗地之地景格局代表性分析

The Landscape Pattern Representative Analysis of the Gandaushi Long-Term Ecological Research Site

本文以地景生態學的理論、原理和方法，應用於關刀溪長期生態試驗地與惠蓀林場之地景格局及變化研究，將該二地區之1964、1977、1987、1996 及1998 五個年代之坡度、坡向、海拔高、年平均溫度、年降雨量、全天光空域、合成水分指數及溫度指數等8 項之40m x 40m 網格分布資料，以F-test 比較生育地因子及K-S test 檢定結果，與二地區之植生調查結果相符，得知關刀溪長期生態試驗地之土地利用型之自然生態分布狀況在惠蓀林場中具有取樣代表性。惟考慮交通較容易到達問題，建議在惠蓀林場第4、5 林班之濱臨關刀溪河岸地區再設置研究區域。 This study used the concepts, principles and methodology of landscape ecology to examine thelandscape patterns and their changes at the Gandaushi Long-Term Ecological Research (GLTER) site, ascompared to those at the Hui-Sun Forest Experimental Station (HSFES), for the years of 1964, 1977,1987, 1996 and 1998. Eight forest ecological variables were studied: slope, aspect, elevation, meanannual temperature, mean annual rainfall, whole light sky space, temperature index and syntheticmoisture gradient. Four landscape diversity indices were used to study the vegetation communitystructures: the Shannon-Weaver diversity index, maximum diversity index, patch dominance andevenness index. The results of the K-S test and F-test showed that there was no significant difference inthe forest ecological variables and the vegetation community structures between the GLTER site andHSFES. They also suggested that the landscape patterns and their changes were similar between the twosites. Therefore, the GLTER site may be representative of HSFES in landscape utilization in the past 34years. However, due to a few forest ecological variables that were not observed in the GLTER site but inHSFES, and considering the accessibility, it is recommended to establish a new long-term forest researchsite in the 4th and 5th compartments in the vicinity of Gandau Creek.