Hourly Forecast Detailed. 1  0am:The Santee, SC forecast for Apr 11 is 63 degrees and Clear. There is 74 percentage chance of rain and 4 mph winds from the South-Southeast. 2  3am:The Santee, SC forecast for Apr 11 is 55 degrees and Clear. There is 79 percentage chance of rain and 4 mph winds from the South.
Most Important Organism? Marine plants produce between 70 and 80 percent of the oxygen in the atmosphere.
So about 40% of the annual global oxygen production is due to Algae. Stock of Oxygen in Atmosphere. About 20.9% of the atmosphere is Oxygen. This is the level after about 3,500 million years of Photosynthesis. What is the share of algae in the stock of oxygen ? Is it proportionate to the annual production or is it higher or lower ?