The oceans are very quickly losing oxygen. Why is it dangerous?
Source:
the Reduction of oxygen in the oceans — it is a real disaster.
The World ocean is a crucial element for sustaining life on the planet. And changes in «aquatic environment» certainly backfire not just inhabitants of seas and oceans, but also those who live on land. As reported, citing data from the International Union for conservation of nature (IUCN), all the world's oceans have lost about 2 percent oxygen in the last half century. And this raises a strong concern in the scientific community, but if this trend continues, the consequences could be disastrous.
Why the oxygen level in the ocean falls?
The International Union for conservation of nature includes 67 scientists from 17 countries. All these experts have done extensive research on the saturation of the ocean with oxygen. They found that since the beginning of 1960 to the end of the year 2019, the level of oxygen in the oceans has decreased and continues to fall. This phenomenon, which they also call «deoxygenating», is largely due to climate change, and due to the effects of global warming and human activities. About the effects of global warming, we often write on our site, so we recommend to stay in the loop.
If we talk about global climate change, the impact is quite obvious. Change «curve» influence water temperature. Large currents to change their temperature, which negatively affects the plants, producing oxygen in the aquatic environment (first of all, it's algae). Less plants — less oxygen. But with everything a little more interesting.
More on reducing the level of oxygen is affected by the… agriculture. The fact that the runoff of fertilizers and other components that people use to plow fields, sooner or later gets into groundwater and then into rivers and later into the oceans. There are these substances not only negatively affect local flora and fauna, but also bind some of the active forms of oxygen, greatly reducing its concentration in the aquatic environment.
Yes, we found that oxygen levels in the oceans have fallen by an average 2 percent. This decline may seem insignificant, however, even this level of losses will affect the life of all animals and plants. notes Dan Laffoley, one of the authors of the report. If you think that 2% is a small loss, then try to climb Everest, and on the way such a loss, believe me, is going to have a very strong influence. This is one trend that is not presented to the public, but greatly affects the environment. And we can already see the consequences of these changes. For example, the reduction of oxygen is the cause of the mass extinction of fishes on the coast of the ocean in several parts of the United States.
But in addition to «oceanic effects» the decline in the concentration of oxygen , as the researchers note, may significantly affect the cycles of other elements, namely — nitrogen and phosphorus, which are "necessary for life on Earth." First and foremost, it is the basis of many nutrients and structural elements of cells. And this in turn will have implications for all organic life forms, including you and me.
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