二十年来,全球海洋已经缩小了超过7 500万平方公里,威胁着海洋生态系统。 Global oceans have darkened over 75 million square kilometers in two decades, threatening marine ecosystems.

来自普利茅斯大学的研究人员发现,在过去二十年中,全球海洋的五分之一以上已经变暗,影响到约7 500万平方公里,相当于欧洲、非洲、中国和北美的总陆地面积。 Researchers from the University of Plymouth found that over the past two decades, more than a fifth of the global ocean has darkened, affecting about 75 million square kilometers, equivalent to the combined land area of Europe, Africa, China, and North America. 这种变暗现象影响到上水层,90%的海洋物种生活在上水层,有可能扰乱海洋生态系统、全球渔业以及碳和养分周转。 This darkening impacts the upper water layer where 90% of marine species live, potentially disrupting marine ecosystems, global fisheries, and carbon and nutrient turnover. 原因包括沿海养分负荷和藻华变化以及开阔水域海面温度变化。 The causes include coastal nutrient loading and changes in algal blooms and sea surface temperatures in open waters.