These are mostly linked to elevated nutrient fluxes in coastal areas, and global warming is likely to cause these zones to expand dramatically in the future. (sciencedaily.com)
Photosynthetic activity can vary with both cloudiness and turbidity, as well as nutrient flux. (planet3.org)
«Similar to what happened during the Permian period, the Earth's modern oceans are facing rapid climate warming and enhanced nutrient fluxes.» (sciencedaily.com)