2013-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/697505摘要：跨政府氣候變遷小組（Intergovernmental Panel on Climate Change [IPCC]）在第四次評估報告書中明確指出，外來種生物入侵為改變環境最主要的非氣候因子，其對於生態系統最嚴重之衝擊在於改變自然脈動的頻率以及降低生物多樣性。台灣約有超過12000種當地特有生物，因此外來種入侵將會對台灣高度多樣性的生態造成極大的威脅。研究者將從生物地球化學（主要為碳與氮）的角度來瞭解外來種入侵對於生態系統的影響。本研究所針對的物種為自中南美洲引進，蔓延在台灣平地與丘陵區極具侵凌性的多年生闊葉蔓藤類植物–小花蔓澤蘭。本研究的目的是結合多尺度光譜學與生物物理技術、冠層輻射轉換模式、生物化學分析以及生態系統模式來解析小花蔓澤蘭入侵對於台灣低地森林生物地球化學循環的影響。本研究預期將對外來種生物研究有所貢獻，並可做為政府相關部門擬定管理政策時的參考依據。 本計畫擬以三年依序完成下列研究項目： 第一年：建立植株尺度小花蔓澤蘭冠層光譜與其生物地球化學成分之間的關係。 第二年：強化小花蔓澤蘭冠層輻射轉換模式與建立侵凌區冠層光譜與生物地球化學成分之間的關係。 第三年：結合兩年的研究發現、生態系統模式所模擬的結果以及地形空間資料來大尺度評估小花蔓澤蘭侵凌對於低地森林生態系的影響。<br> Abstract: The Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report stated that alien species invasions have been identified as a major non-climatic driver to global change. Their most severe impacts on ecosystems are the alteration of natural patterns and the decline of biodiversity. Biological invasions can bring serious threats to Taiwan’s natural environments, where are resided by more than 12000 endemic species. One of the most troublesome alien species in Taiwan is Mikania micrantha, which is a Central and South American perennial vine species commonly found in low elevation. The main goal of the proposed research is to assess the impact of M. micrantha infestation on the Taiwan’s lowland forests at different scales by investigating the biogeochemical (mainly carbon [C] and nitrogen [N]) dynamics along the invasion gradient. The main approach will be the integration of multi-scale spectroscopic and biophysical measures, canopy radiative transfer, biochemical analysis and ecosystem modeling. The outcomes of this study are expected to advance invasive species science, and should be able to provide useful information for related government agencies managing this notorious species. The main work schedule for this three-year research follows: Year 1: Investigation of the relationship between canopy reflectance and biogeochemistry of M. micrantha at the individual plant scale. Year 2: Refinement of the M. micrantha canopy radiative transfer model for the spectroscopic estimation of C and N contents of M. micrantha infested sites. Year 3: Integration of previous years’ research findings, simulated results from an ecosystem model and spatial layers of topo-edaphic attributes for a large scale assessment of the ramification of M. micrantha proliferation on the lowland forest ecosystems across the invasion gradient.生物地球化學生物入侵碳Carnegie-Ames-Stanford Approach (CASA)Hyperion小花蔓澤蘭氮遙測光譜學biogeochemistrybiological invasioncarbonCarnegie-Ames-Stanford Approach (CASA)HyperionMikania micranthanitrogenremote sensingspectroscopy