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題名 | 以生態觀點探討小型島嶼之最高道路密度--以金門為例=A Study of Ecologically Highest Road Density for Small Islands--A Case of Kinmen |
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作者 | 林世強; | 書刊名 | 國家公園學報 |
卷期 | 15:2 民94.12 |
頁次 | 頁17-30 |
分類號 | 367 |
關鍵詞 | 生態; 小型島嶼; 道路密度; 金門; Ecology; Small island; Road density; Kinmen; |
語文 | 中文(Chinese) |
中文摘要 | 小型島嶼之建設對生態產生最重大影響者首推道路之開發,道路網絡造成生物棲息地之破碎與惡化,最終可能使得部份島上物種滅絕,因此探討與檢討小型島嶼之道路密度對島上之生態保育與開發至關重要。本文以生態之觀點探討金門可容忍之最高道路密度,主要以大型掠食性動物可存活繁殖之容許道路密度為主要依據,推算出如金門之小型島嶼相對應之道路密度,其結果可有三選項1.大型掠食動物之容許道路密度為理想值,2.以模範島嶼(日本沖繩)之道路密度為標準配合等量之物種生存空間而推算之理想道路密度,3.以聯合國定義之最大的小型島嶼為虛擬模範島嶼,推算金門理想之道路密度。由本研究所得,模式二(第二選項)所得之道路密度最為保守,以生態保育的角度而言,應是較佳之選擇。 金門現有之道路密度已遠超過完整生態所能負荷,金門應檢討道路之開發模式及考慮封閉部份不當使用之道路,以復育?樣之生態環境。本文主要以小型島嶼之道路與動物互存關係為主要研究標的,雖僅對金門進行探討,但此研究方法相信亦可應用於其他小型島嶼及大陸型地區之棲地島嶼或生態獨立型區域之道路政策檢討上,其結果可作為該地區道路規劃之重要指標。 |
英文摘要 | Road construction is one of the most destructive developments on small islands. Road networks can lead to fragmentation of habitats, and subsequent local extinctions of native species, hence it is important to study the influence of road systems on a small island’s ecosystem. Using the Kinmen Islands as an example, this research intends to obtain the acceptable road density for small islands, from an ecological point of view. Three methods of deriving the acceptable road densities for small islands are developed in this research. The first method incorporates the allowable density of roads for sustaining viable populations of wolves in continental areas. However, the allowable road density for wolves was obtained in continental areas and it is not clear that if it has valid, direct application, on small islands. The second method modifies the road density from model islands to fit the conditions of the desired islands. We take Okinawa (Japan0 as the model island and derive a suitable density of roads for Kinmen. Finally, in the third method, we select the largest small island as the model island and apply the same derivation procedure of the second method to find another ideal road density for Kinmen. The results show that the current road density of Kinmen has exceeded the result obtained by the three models. Therefore, road construction policies must be rigorously reviewed for the sake of Kinmen’s ecosystem. Although this research is focused on Kinment, the same approaches can be applied to other small islands or habitat islands or ecologically independent area in large islands or continents for reviewing their road developing policies. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。