correct me if I am wrong.
1 microliter ( μL ) per liter = 1 ppm, reference: http://www.engineeringtoolbox.com/ppm-d_1039.html
So, the CO2 compensation points of 16 freshwater algae ranged from 4.8-41.5 microliters per liter (or 4.8-41.5 ppm) at acid pH,
while at alkaline pH they ranged from 0.2 to 7.2 microliters per liter (or 0.2-7.2 ppm).
Obviously algae adapted easily to the alkaline environment. But in the acid environment, I am not sure if algae are doing any better than the aquatic plants? How do we rule out that it is CO2 ALONG that control the algae bloom but not the accompanied acid environment?