台灣北部滿月圓山植群之分析

Abstract

台灣北部滿月圓山植群分析之研究 摘要

本研究主要的目的為調查滿月圓山的植群，且加以分析。滿月圓山位於台灣北部，多為岩石環境，地質特殊，雖海拔僅有872公尺，但因三面均為溪谷包圍，以致山勢陡峭，進而影響植群的組成與結構。 本次研究一共設置了三十四個樣區，分散於滿月圓山區及滿月圓山國家森林遊樂區的柳杉人工林，並調查了八種環境因子。經過雙向指標種分析、降趨對應分析以及矩陣群團分析後，大致可將研究區域內的森林分為四個型及六個亞型，分別為： A、 大明橘－長尾栲型 A1、綠樟－小葉赤楠亞型 A2、長尾栲－青剛櫟亞型 B、 黃杞－樹杞型 B1、奧氏虎皮楠－樹杞亞型 B2、長梗紫麻－樹杞亞型 C、 九芎－樹杞型 C1、赤皮－樹杞亞型 C2、大葉楠－山香圓亞型 D、 柳杉型 本區植物分布的主要受海拔高度影響，其他因子如地形位置、坡度、坡向的交互作用也是導致如此結果之因素。本區天然植物社會的均勻度指數多為0.7以上，顯示研究區域內植物種類豐富。這些結果可作為往後相關研究的參考。

Vegetation analysis of Mt. Man-yueh-yuan, North Taiwan Abstract The aim of this study is to investigate and analyze the vegetations of Mt. Man-yueh-yuan. The mountain is located at northern Taiwan, and surrounded by three small streams. The slopes are rocky and steep. The altitude of the mountain is only 872 meters above sea level, but the composition and structure of the vegetation are different from other areas of northern Taiwan. A total of thirty four plots was set up in the study area, including five plots in the Cryptomeria plantations of Man-yueh-yuan national forest recreation area. All plots were provided with measurements of 8 environmental factors. According to the results of the two-way indicator species analysis (TWINSPAN), detrended correspondence analysis (DCA), and matrix cluster analysis (MCA), the following 4 main vegetation types and 6 subtypes are recognized: A、Myrsine seguinii － Castanopsis cuspidata var. carlesii type A1、Meliosma squamulata － Syzygium buxifolium subtype A2、Castanopsis cuspidata var. carlesii － Cyclobalanopsis glauca subtype B、Engelhardia roxburghiana － Ardisia sieboldii type B1、Daphniphyllum glaucescens var. oldhamii － Ardisia sieboldii subtype B2、Oreocnide pedunculata － Ardisia sieboldii subtype C、Lagerstroemia subcostata － Ardisia sieboldii type C1、Cyclobalanopsis gilva － Ardisia sieboldii subtype C2、Machilus japonica var. kusanoi － Turpinia formosana subtype D、Cryptomeria japonica type The distribution of plant species in the study area is mainly determined by altitude, but other factors including topography, slope, position and aspect are also partially related. The Evenness indices of primary forests are more than 0.7, showing a high diversity of plant species in the study area. The present results may serve as basic information for comparative studies in other areas.