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題 名 | Altitudinal Distribution Patterns of Plant Species in Taiwan Are Mainly Determined by the Northeast Monsoon Rather than the Heat Retention Mechanism of Massenerhebung=臺灣植物物種海拔分布模式主要是由東北季風造成,而非山塊蓄熱機制造成 |
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作 者 | 邱祈榮; 宋國彰; 簡睿涵; 謝長富; 王震哲; 陳明義; 劉和義; 葉慶龍; 夏禹九; 陳子英; | 書刊名 | Botanical Studies |
卷 期 | 51:1 2010.01[民99.01] |
頁 次 | 頁89-97 |
分類號 | 371.9 |
關鍵詞 | 海拔分布; 中央山脈; 緯度梯度; 季風; 山塊效應; 臺灣; Altitudinal distribution; Central Mountain Range; Latitude gradient; Monsoon; Massenerhebung; Taiwan; |
語 文 | 英文(English) |
中文摘要 | 本研究的主要目的是重新分析植物物種在台灣中央山脈中段(稜線高於2,000 公尺之處)的分布模式,並找出造成這些分布模式的最重要因子。我們在中央山脈中段從北到南,按一定的間隔,畫出了三個東西向的樣帶。每個樣帶又根據坡向(東向坡及西向坡)再分成兩區。我們利用台灣國家植群調查計畫的資料來分析這六個樣區內物種的分布模式。結果發現在北邊及中間的樣帶東向坡的物種分布明顯地比西向坡的低,但在南邊的樣帶兩個坡向物種海拔分布的差距並不顯著。分析同一個坡向上,物種沿緯度梯度的分布趨勢,其結果顯示在東向坡,物種海拔分布隨緯度的減少而增加; 而在西向坡,這個趨勢並不明顯。這兩個坡向截然不同的分布模式,可用東北季風與中央山脈地形的交互作用來妥善地解釋,但無法用山塊效應(Massenerhebung)中的山塊蓄熱機制來解釋。過去認為植物物種海拔分布在中央山脈的中部最高,越往南北兩端則越低。根據我們的研究,這個說法應該要修正成: 在中央山脈中段的東向坡,物種分布越往南越高; 在西向坡,物種分布並不因緯度改變而有明顯的變化。 |
英文摘要 | The objectives of this study are to revisit altitudinal distribution patterns for plant species in the main sections (where the ridges are higher than 2,000 m above sea level) of the Central Mountain Range (CMR) in Taiwan and identify the most influential environmental factor resulting in these patterns. Three east-west oriented sampling belts at regular latitudinal intervals were laid out in the main sections of the CMR. Each belt was further divided into two regions according to the aspect (the east-facing and west-facing aspects). The data of species altitudinal distribution for the six regions were extracted from a dataset of a national vegetation mapping project. On the north and central sampling belts species altitudinal distribution is markedly lower on the east-facing aspect than on the west-facing aspect, whereas on the south belt species altitudinal distribution between the two aspects does not differ significantly. There is an increasing tendency of species altitudinal distribution with the decrease of latitude on the east-facing aspect of the CMR. In contrast, the tendency is barely noticeable on the west-facing aspect. The distinct distribution patterns between the two aspects can be better explained by climatic heterogeneity created by the interaction between the winter northeast monsoon and the topographic effect of the CMR than by the heat retention mechanism of Massenerhebung. The previously-proposed distribution pattern that claimed that species altitudinal distribution descends gradually towards the north and south ends of Taiwan should be revised. On the east-facing aspect of the main sections of the CMR, species altitudinal distribution rises as latitude decreases. On the west-facing aspect, such tendency is not evident. |
本系統中英文摘要資訊取自各篇刊載內容。