- Carl Zimmer, "A Looming Oxygen Crisis and Its Impact on World's Oceans".Carbon dioxide emissions from human activities are destabilising the climate under which human civilisation has developed. That is well known and widely discussed. They are also acidifying the oceans ten times faster than during a mass marine extinct event 55 million years ago. That is less well-known, but possibly just as serious. But there is yet another global threat from rising carbon dioxide levels: a decline in oceanic oxygen levels. Not simply the local devastation caused in an increasing number of sites from fertiliser run-off creating marine "dead zones" starved of oxygen, but a global issue. Warmer water can hold less oxygen and warmer water is more stratified, making the mixing of surface oxygen with deeper water slower. Although the absolute drop in oxygen may seem slight (single digit percentages over many decades), this could have severe effects on many marine creatures for whom oxygen intake represents a primary limiting factor. The winners? Jellyfish and certain bacteria that thrive in oxygen-depleted conditions. The former are presently experiencing a population explosion (largely due to overfishing removing competition, amongst other causes). The latter are a source of yet more potent greenhouse gases.
Take a deep breath and read the full article.
"And God said, 'Let the waters bring forth swarms of living creatures, and let birds fly above the earth across the dome of the sky.' So God created the great sea monsters and every living creature that moves, of every kind, with which the waters swarm, and every winged bird of every kind. And God saw that it was good. God blessed them, saying, 'Be fruitful and multiply and fill the waters in the seas, and let birds multiply on the earth.'"
- Genesis 1.20-21.Are we undoing creation and denying the blessing of God?