人類對土地的需求日益增加,長期以來土地轉用的破壞遠超過環境所能容忍的修復力和承載力,當政府在經濟利益與生態環境的抉擇下選擇前者,將使農地的保存相對困難,也容易低估農地在農業生產以外的生態系統服務價值。目前在土地開發的前期評估上,生態價值常被忽略或低估,需要透過相關概念與模擬的方式讓生態效益與實質的經濟效益同時被考量,並納入政策考量。
儘管開發能創造較高的經濟產值,但將生態系統損害價值納入評估後,是否能實際達到預期收益有待檢視。過去研究側重於以空間角度模擬不同情境下可能發生的變化,但以經濟角度進行分析相對缺少。因此,本研究嘗試以麻豆工業區為研究對象,以農地轉用的觀點探討土地轉用對生態系統服務的影響,並將結果轉化為經濟價值做出比較。研究結果顯示,土地使用的改變不僅對農地供給產生負面影響,同時也會連帶降低生態系統的環境效益。四種生態系統指標皆在土地使用改變的情況下隨之下降,證實了土地使用改變必定會對環境造成不可逆的衝擊與影響;此外,若將生態系統服務價值納入計算後,保守估計開發獲利將大幅減少7%,若將其它不確定因素皆納入考量後,未必能達到原有開發之預期效益。因此,未來應將生態系統價值比較結果,納入前期評估成為規劃、決策及管理上的重要目標,也有助於提升人類對於環境價值的認知水平。
The escalating demand for land utilization by humans has resulted in the unprecedented transformation of natural habitats, exceeding the carrying capacity and restorative capabilities of the environment. In the pursuit of economic interests, governments often prioritize land conversion over ecological considerations, making the preservation of agricultural land a challenging task. Furthermore, the intrinsic ecological value of farmland beyond its role in agricultural production is frequently underestimated during the early assessment stages of land development. This study aims to investigate the repercussions of land conversion on ecosystem services from an agricultural land conversion perspective, bridging the knowledge gap between ecological and economic dimensions.
The case study focuses on the Madou Industrial Zone, where the impacts of land use changes on ecosystem services are examined, and the results are subsequently transformed into economic valuations for comparative purposes. The findings reveal that alterations in land use not only adversely affect agricultural land supply but also have cascading effects on the environmental benefits provided by the ecosystem. Four key indicators of ecosystem services exhibit a declining trend under changing land use, affirming the irreversible impact on the environment. Incorporating the economic value of ecosystem services into the assessment indicates a substantial reduction in development profitability based on conservative estimates. When accounting for various uncertain factors, the anticipated benefits of the original development may not materialize as expected. Thus, integrating the comparison of ecosystem values into the early evaluation becomes a critical goal for planning, decision-making, and management processes, while simultaneously raising awareness about the importance of acknowledging the value of the environment in human activities.