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Change in Oxygen Levels
Scientists examined samples and measurements collected from 393 lakes in temperate regions of the globe across a period from 1941 to 2017, discovering a general decrease in dissolved oxygen in both shallow and deep water habitats. That change in oxygen levels has a contagion effect, all the way from the water biogeochemistry to the health of human populations who may depend on these lakes.
It could also bring about boosted greenhouse gas emissions from aquatic bacteria that generate methane. Kevin Rose, an environmental biologist from the Rensselaer Polytechnic Institute said: All complex life relies on oxygen, It s the aquatic food web s support system. And when you begin to lose oxygen, you have the possibility of losing species.
气候变暖威胁水生生态：过去40年 全球湖泊的溶解氧平均下降5 5% _ 东方财富网 eastmoney.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eastmoney.com Daily Mail and Mail on Sunday newspapers.
World’s lakes ‘losing oxygen rapidly due to global warming’
Climate change is driving down oxygen levels in lakes around the world (Anna Gowthorpe/PA)
Freshwater lakes around the world are losing oxygen rapidly as a result of global warming, with potentially disastrous consequences for wildlife, researchers have warned.
A study, published in the journal Nature, suggests oxygen levels in lakes have declined 5.5% at the surface and 18.6% in deep waters over the last four decades – up to nine times faster than in oceans.
The scientists said that while lakes make up only a fraction (around 3%) of Earth’s land surface, they house “a disproportionate concentration of the planet’s biodiversity”.