Low oxygen conditions slow decay rates, resulting in much of the carbon accumulating in the soil. (fs.fed.us)
To his surprise, he found that mutations allowing the bacterium to adapt to low - oxygen conditions in the mucus also decrease its susceptibility to antibiotics. (discovermagazine.com)
The traditional explanation has been that low - oxygen conditions cause the body to build new red blood cells, making it easier to supply oxygen to muscles and vital organs. (sciencemag.org)