Applying Maximum Entropy Model in the Spatial Distribution Factors of Invading Mikania

• Main Authors: Ya-Chun Mai, 麥雅鈞
• Other Authors: Shyang-Woei Lin
• Format: Others
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/98598473774325749849

碩士 === 國立東華大學 === 自然資源與環境學系 === 102 === Mikania micrantha H.B.K- an invasive alien plant - is a vine plant of Asteraceae family. It has been introduced by the Forestry Bureau since 1970 for the purpose of enhancing soil and water conservation in Taiwan, and resulted in serious ecological crisis, too. It not only influenced the growth of native plants, but also changed ecological environment. Therefore, in recent years, the government has tried actively to implement the vine-removing policy for Mikania micrantha, although the effect is limited. In this study, using maximum threshold of species distribution pattern, we investigated the spatial distribution of Mikania micrantha, ranging from the north of northeastern end of Three-stack Creek to the southern tip of Gian Creek, and environmental influential factors, slope, slope direction, rainfall, population, land coverage, non-urban usage to establish diagrams of natural and artificial environmental factors. The result suggested that the spatial distribution of the specie resulted not just from single environmental condition. According to our study, the spatial-distributing ratio of Mikania micrantha can be divided into high-potential areas, mid-potential areas, and low-potential areas. Among all of the environmental factors, land coverage plays a crucial role for Mikania micrantha’s spatial distribution.