11. Highly organic-rich siliceous shales were deposited during this time in anoxic conditions on the sea bottom. 12. Consequently, varves commonly form under anoxic conditions . 13. Many species of bacteria can transform arsenite to arsenate in anoxic conditions by using arsenite as an electron donor. 14. Species sensitive to anoxic conditions are replaced by fewer hardier species, reducing the overall variability of the affected area. 15. The color and acidity of the water is due to the acidic organic anoxic conditions which limits plant growth. 16. A few animals, including some turtles, can survive anoxic conditions by slowing their heart rates, and their metabolism, way down. 17. Plants usually rely on soil primarily for support and water ( in quantitative terms ), but also obtain anoxic conditions . 18. The oil shale is thought to have been the result of slow deposition of planktonic algae . under anoxic conditions . 19. Algal blooms creating anoxic conditions and cannibalism caused by high density stocking of ponds are also challenges to koura farmers. 20. When oxygen concentrations become low, anoxic conditions may develop which can decrease the ability of the water body to support life.
