嘉義縣石夢谷地區植群之研究

Studies on the Vegetation of Shih Meng Ku Area, Chiayi County

龔冠寧(Kuan-Ning Kung) ； 林彥佑(Yen-Yu Lin) ； 呂福原(Fu-Yuan Lu) ； 張坤城(Kun-Cheng Chang) ； 謝名彥(Ming-Yen Hsieh)

《嘉大農林學報》 18卷1期 (2021/02) Pp. 59-82

摘要

嘉義縣阿里山地區的植物資源豐富，有許多針對植物資源調查及多樣性分析的研究報導，惟石夢谷地區植群相關研究甚少。本研究設置43個10×25m^2樣區進行植物資源調查，分析植物組成、結構與分布差異。研究區域共紀錄維管束植物148科418屬747種，其中特有種為148種，受脅物種計有牛樟等17種，占全體物種百分比為2.28%。植群社會經雙向指標種分析（TWINSPAN）與降趨對應分析（DCA），可分為2個群團，6個群叢如下，A.卡氏櫧群團：A1.森氏杜鵑－臺灣扁柏群叢、A2.披針葉木犀－日本楨楠群叢、A3.香桂－卡氏櫧群叢、A4.霧社木薑子－豬腳楠群叢；B.長梗紫苧麻群團：B1.臺灣山龍眼－木荷群叢、B2.長梗紫苧麻群叢。經調查統計，A1.森氏杜鵑－臺灣扁柏群叢與A3.香桂－卡氏櫧群叢有較高的物種多樣性和均勻度，又所有植物群叢類型的均勻度皆介於0.78-0.88之間，顯示研究地植群日漸趨於穩定狀態並向演替後期的極盛相發展，且經降趨對應分析結果，顯示植群型的分布受到海拔梯度、坡度及全天光空域的影響。蕨類商數（Ptph-Q）為6.6，顯示該處溫潤潮濕多雨。石夢谷具豐富植物資源，本研究之生態研究與基本植群資料建立，期能提供日後森林生態保育與經營之用。

關鍵字

降趨對應分析 ； 植物資源 ； 石夢谷 ； 雙向指標種分析 ； 植群

並列摘要

In recent years, Shih Meng Ku area has not had a complete floristic study of its vegetation. This study aims to investigate plant resources, composition and structure of the forest in Shih Meng Ku area in Chiayi County. 43 plots (25×10m2) of vegetation were set up to analyze the structure of vegetation types and evaluate the conservation of rare plants. 747 species, 418 genera, 148 families of vascular plants were recorded, including 148 endemic species and 17 species of threatened species such as Cinnamomum micranthum. The percentage of all species in the area classified as threatened species is 2.28%. There were two alliances and six associations classified by the Two-Way Indicator Species Analysis and Detrended Correspondence Analysis: A. Castanopsis carlesii alliance : A1. Rhododendron pseudochrysanthum - Chamaecyparis obtusa var. formosana association, A2. Osmanthus lanceolatus - Machilus japonica association, A3. Cinnamomum subavenium - Castanopsis carlesii association and A4. Litsea elongata var. mushaensis - Machilus thunbergii association; B.Oreocnide pedunculata alliance: B1. Helicia formosana - Schimasuperba var. Superb association, B2. Oreocnide pedunculata association. Among them, the A1. Rhododendron pseudochrysanthum - Chamaecyparis obtusa var. formosana association and A3. Cinnamomum subavenium - Castanopsis carlesii association had higher diversity and evenness, but had lower richness. In addition, the evenness of all types were between 0.78-0.88. This evidence shows that the vegetation of Shih Meng Ku was stably developed to climax gradually. The altitude, slope and whole light sky were revealed as major factors affecting vegetation. The Ptph-Q was 6.6, revealed the warm and humid environment. The vegetation classification of this study would provide the basic references for conservation and sustainable management of Shih Meng Ku area.

並列關鍵字

Detrended Correspondence Analysis (DCA) ； Plant resource ； Shih Meng Ku ； Two-Way Indicator Species Analysis (TWINSPAN) ； Vegetation