藤枝森林遊樂區植群生態研究

Study on the Vegetation Ecology of Tenchih Forest Recreation

楊勝任(Sheng-Zehn Yang) ； 林坤益(Kun-Yi Lin)

《中華林學季刊》 39卷1期 (2006/03) Pp. 43-55

https://doi.org/10.30064/QJCF.200603.0004

摘要

高雄縣藤枝森林遊樂區屬於林務局第70-72林班，本文於海拔1,300-1,820m之間設置31個500平方公尺樣區並評估7項可能的環境變數，探究植群型與重要的影響變數。植群分類使用雙向指標種分析，物種分布序列以降趨對應分析找出主要環境梯度軸，並以多元逐步回歸粹取出主要變數，藉由Monte Carlo顯著性測驗測試主要環境梯度軸之環境因子特徵值是否顯著。結果顯示遊樂區調查範圍內計有維管束植物284種，其中蕨類植物有44種，裸子植物有6種，雙子葉植物有210種，單子葉植物有24種，其中瀕臨絕滅種3種、易受害種6種、低危險種1種。分布序列第一梯度軸具顯著性因子為海拔高與方位，影響本區的植物分布。本區天然植群可分為山香圓－假長葉楠型；枇杷葉灰木－長葉木薑子型；錐果櫟－長尾柯型3種植群型。人工林則為柳杉林；臺灣杉林；雲杉林；紅檜林；日本扁柏林。

關鍵字

降趨對應分析 ； 高雄縣 ； 重複分析 ； 藤枝 ； 雙向指標種分析

並列摘要

Tenchih forest recreation area, located in Kaohsiung county, belongs to 70-72th compartments of Taiwan Forestry Bureau. Our study contains 31 plots with 500m^2 area each from 1,300 to 1,820m in elevation. Seven environmental variables were measured and estimated for each plot. The aim of this study was to classify the major vegetation types and the variables influencing their distribution. Plant communities were classified using TWINSPAN and ordination of species was examined to find the major gradient axis using DCA. The major environmental variables were tested by multiple stepwise regressions. The significance of eigenvalues about major gradient axis and environment variables were tested using Monte Carlo permutation. Results showed that 284 vascular plants, including 44 pteridophytes, 6 gymnosperms, 210 dicotyledon, and 24 monocotyledon were found. Among them, three species were endangered, six species were vulnerable, one species was with low risk. The first gradient axis of ordination was significant and altitude, aspect were important variables explaining the floristic variation and community types. The natural vegetation communities were classified into three major types, namely Turpinia formosana-Machilus japonica type, Symplocos stellaris-Litsea acuminata type, Cyclobalanopsis longinux-Castanopsis sessilis var. carlesii type. The man-made forest types include Cryptomeria japonica type, Taiwania cryptomerioides type, Picea morrisonicola type, Chamaecyparis formosensis type, Chamaecyparis obtusa type.

並列關鍵字

Detrended correspondence analysis ； Kaohsiung county ； Redundancy analysis ； Tenchih ； Two-way indicator species analysis