Question

What effect would there be on the marine environment if there was a significant decrease in the number of blue-green alga in an area?

Answer 1

Cyanobacteria reduce nitrogen and carbon dioxide under cellular respiration. If there is a significant decrease in the cyanobacteria, there would be a decrease in productivity because the algae "fix" nitrogen needed for protein production.

Is this a sufficient answer for this question?

Answer 2

There would be a reduced nitrogen and protein in the marine environment because the algae produce nitrogen needed for protein synthesis.

Answer 3

Thank you, that's the answer I was leaning towards.