Scientists warn of declining oxygen levels in oceans and rivers
科學家警告海洋與河流中的氧氣含量正在下降
更新於: 2026年7月21日 上午01:45
A quiet crisis is unfolding beneath the surface of our waters.
一場靜悄悄的危機正在我們的水域下蔓延。
Known as aquatic deoxygenation, the decline of dissolved oxygen levels in oceans, rivers, and lakes has become a critical environmental threat.
這被稱為水體脫氧作用，海洋、河流和湖泊中溶氧量的下降已成為嚴重的環境威脅。
Since 1960, oceans have lost roughly 2% of their oxygen, while some lakes have seen declines as high as 18%.
自1960年以來，海洋已損失約2%的氧氣，而一些湖泊的降幅則高達18%。
This loss creates 'dead zones' where aquatic life cannot survive.
這種流失創造了水生生物無法生存的「死亡區」。
Two main factors drive this disaster: global warming and nutrient pollution.
兩個主要因素導致了這場災難：全球暖化與營養鹽污染。
Rising temperatures cause water to hold less oxygen and prevent natural mixing, while agricultural runoff triggers massive algal blooms that consume oxygen as they decompose.
氣溫上升導致水體滯氧能力下降，並阻礙了自然的垂直混合，而農業徑流則引發了大量藻類水華，這些藻類在分解時會消耗氧氣。
As oxygen levels drop, biodiversity suffers.
隨著氧氣水平下降，生物多樣性受到衝擊。
Addressing this requires urgent action, including reducing greenhouse gas emissions and controlling nutrient runoff.
解決此問題需要採取緊急行動，包括減少溫室氣體排放與控制營養鹽徑流。
