Yellow Butterfly Valley has been designated as part of the area to be flooded by the planned Meinung Reservoir, and it has also suffered continuous encroachment from inappropriate land clearance for agriculture, causing the number of butterfly species, and their populations, to decline. These events have prompted conservationists both inside and outside Taiwan to call on the government to pay heed to changes in the local ecology.
黃蝶翠谷在被規畫為美濃水庫淹沒區後，人為開墾又不斷侵入當地，蝶類逐日減少，就引來國、內外保育人士群起呼籲政府關注當地的變化。