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題 名 | 臺灣東北季風影響下植群生態之研究--以東北部基隆火山群一帶為例=Vegetation Ecology Under the Influence of Northeastern Monsoon Climate--A Case Study of Keelung Volcanic Mountain Group, Northeastern Taiwan |
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作 者 | 陳益明; | 書刊名 | 國立臺灣大學農學院實驗林研究報告 |
卷 期 | 14:3=229 2000.09[民89.09] |
頁 次 | 頁143-157 |
分類號 | 436.12 |
關鍵詞 | 東北季風; 基隆火山群; 植群型; 硬葉林; Northeast monsoon; Keelung volcanic mountain group; Vegetation type; Sclerophyllous forest type; |
語 文 | 中文(Chinese) |
中文摘要 | 基隆火山群屬於東北部臨海型氣候區,冬季受東北季風影響,雨量極多,森林植群呈現與其他氣候區不同之特性。本研究以32個樣區及9個環境因子,利用降趨對應分析及列表比較法,將本區森林分為三個植群型,其下再分出7個亞型:I.大明橘型:(IA)細葉山茶亞型,(IB)白校欑-大明橘亞型;II.水金京-紅楠型:(IIA)鐘萼木-紅楠亞型,(IIB)大葉楠-紅楠亞型,(IIC)野鴉樁-紅楠亞型;III.刺社密-森氏紅淡比型:(IIIA)筆羅子-紅楠亞型,(IIIB)大葉楠-豬母乳亞型。 第I型及第II型分化主要和風力有關,前者位於風上側,形成一特殊常錄硬葉林型;後者涵蓋大部份背風坡,形成一常綠闊葉樹林型。(IIA)亞型為本氣候區特殊演替早期林型;(IIB)亞型屬於本氣候區特有之壓縮型森林,第III型分布於低海拔溪谷地區。本研究另對各植群型重要組成樹種及稀有植物鐘萼木進行直徑級族群構造分析及演替趨勢推測,並提出本區稀有植物保育評估。最後依據比較現有一些植群生態研究報告結果,提出本研究區在東北季風影響下,森林植群所呈現的6項特性: 1. 森林層次分化少,樹高降低,樹木密度增大。 2. 愈靠近海岸地區,殼斗科種數明顯下降,樟科仍維持相當岐異度。 3. 硬葉林及硬葉灌叢為東北季風影響下迎風坡特有之林型。 4. 演替初期階段有所不同。 5. 出現植群帶壓縮、南北分布型植物及中高海拔植物北降現象。 6. 依殼斗科錐果櫟、赤皮及烏來柯內陸型特徵種出現情形,可印證臺灣東北部內陸及臨海型之氣候劃分。 |
英文摘要 | Keelung volcanic mountain group area is within the coastal type of northeast climatic region. Its forest vegetation is distincted from other climatic regions, for it is influenced by plenty winter rainfall brought by the NE monsoon wind. With 32 samples and 9 environmental factors, using detrended correspondence analysis and tabular comparison had recognized 7 subtypes under 3 main vegetation types as follows: I. Myrsine sequinii type: (IA)Camellia tenuifolia subtype, (IB)Castanopsis cuspidate-Myrsine sequinii subtype; II.Wendlandia formosana-Machilus thunbergii type: (IIA)Bretschneidera sinensis-Machilus thunbergii subtype, (IIB)Machilus kusanoi-Machilus thunbergii subtype, (IIC)Euscaphis japonica-Machilus thunbergii subtype; III.Bridelia balansae-Cleyera japonica type, (IIIA)Meliosma rigida-Machilus thunbergii subtype, (IIIB)Machilus kusanoi-Ficus fistulosa subtype. The differentiation of type I and type II was mainly attributed from prevailing wind. The former occupied upper windward slope forming an unique evergreen sclerophyllous forest type, while the latter covered most of the leeward slope forming a evergreen broad-leaved forest type. Of the type II, subtype IIA was a special forest which was not found from other areas; subtype II B is a special forest belonging to the northeast climatic region, as a result of compressed zonation. Type III was located at lower elevation. I also studied with the population structure of the dominant species of these forest types, including the rare species Brtschneidera sinensis. Moreover, general successional changes for vegetation, and rare plants conservation status were provided in this paper. Based on comparing the vegetation of other climatic regions under the influence of NE monsoon climate, the vegetation of studied area was characterized by the following 6 features: 1. The stratification of the forests was poorly differentiated, with decreasing tree height and increasing tree density. 2. n the forest type toward coastal area, diversity of lauraceae species was well maintained, while that of Fagaceae was significantly decreased. 3. Sclerophyllous forests and scrubs were special vegetation types on the windward slope under the influence of NE monsoon. 4. The vegetation types showed somewhat different early successional stages. 5. The appearance of compressed vegetation zones, together with the lowering of altitudinal distribution of plants, and north-south disjunctive distribution of plants were evidenced by this study. 6. A line of demarcation between northeast coastal region and inland region can be confirmed by the distribution of some inland character species, namely, Quercus longinux, Quercus gilva and Limlia uraiana. |
本系統中英文摘要資訊取自各篇刊載內容。