棲蘭山檜木林不同干擾強度下植物多樣性之研究

Different Disturbance Intensity Situation of Plant Diversity of Chamaecyparis Forest in Chilanshan, Northeast of Taiwan

魏瑞廷(Jui-Ting Wei) ； 陳子英(Tze-Ying Chen)

《宜蘭大學生物資源學刊》 8卷2期 (2012/12) Pp. 1-11

https://doi.org/10.6175/job.2012.82.11

摘要

本文係研究棲蘭山檜木林四種不同干擾強度下之植群組成結構、物種多樣性及林分恢復之情形，利用（1）重要值指數比較分析不同干擾強度下各植群組成結構的差異；（2）物種豐富度及物種多樣性指數（Shannon指數）比較分析不同層次物種多樣性之變化；（3）降趨對應分析（DCA）軸長分析比較不同干擾強度之林分恢復情形。結果顯示，（1）在不同干擾強度下各植群組成結構：冠層之優勢樹種係以台灣扁柏、紅檜及台灣鐵杉為主；次冠層則以薯豆、白花八角、早田氏冬青、台灣杜鵑及高山新木薑子等為主；灌木層以深山野牡丹、假柃木及台灣扁柏苗木等為主；草本層以玉山箭竹、瘤足蕨屬及鱗毛蕨科之物種為主，而本研究在人為干擾林分中發現在灌木層有天然下種更新之台灣扁柏小苗，未來將可能取代現有的紅檜人工造林；（2）不同層次物種多樣性之變化：冠層以160林道天然林的物種多樣性指數高於其他林分；在次冠層方面以160林道天然林的物種多樣性指數高於其他林分；在灌木層方面以130林道天然林的物種多樣性指數高於其他林分；在地被層方面以檜木保育更新地的物種多樣性指數高於其他林分；（3）不同干擾強度之林分恢復情形：冠層已恢復至天然林階段；次冠層、灌木層及地被層由於受人為干擾強度影響，目前仍處於恢復階段。

關鍵字

恢復 ； 物種多樣性 ； 物種豐富度 ； 降趨對應分析法

並列摘要

This study analysed the four different disturbance intensity situation of vegetation composition structure, species diversity and forest restoration condition of cypress forest in Chilanshan. The important value index (IVI) was used to analysis under different disturbance intensity in different vegetation compositions. Species richness and species diversity index (Shannon Index) comparative analysis of the changes in species diversity at different levels, Destrend correspondence analysis (DCA) axial length analysis compared the restoration difference between forests in different disturbance intensity. The results showed that 1. disturbance intensity in different layer of vegetation composition: dominant species in canopy layer of the forest were Chamaecyparis obtusa var. formosana, C. formosensis, and Tsuga chinensis, tree layer was dominant by Elaeocarpus japonicus, Illicium anisatum, flex hayataiana, Rhododendron formosanum and Neolistea acuminatissima, the shrub layer was dominant by Barthea barthei, Eurya crenatifolia and seedling of C. obtusa var. formosana, and the herbaceous layer was dominant by Yushania niitakayamensis, Plagiogyria spp. and Dryopteridaceae. We founded that the shrub layer after human interference which have C. obtusa var. formosana seedling regeneration, which might further replace the present plantation. 2. Chang of species diversity at different layers: the canopy and tree layer of natural forests at forest road No. 160 were higher species diversity index than other forests, the shub layer in natural forests at forest road No. 130 were higher species diversity index than other stands, and the ground layer in natural regeneration cypress forest were higher species diversity index than other stands, 3. Forest restoration in different disturbance, of the canopy layer has been restored to natural forest stage. However, the tree layer, shrub layer and ground layer disturbance were still in recovery phase layer.

並列關鍵字

restoration ； species diversity ； species abundance ； Destrend correspondence analysis