What effect do algae blooms have on Ocean ecosystems?

A. increased underwater plant population
B. decrease carbon dioxide in the water
C. increased fish population
D. decreased oxygen in the water

1 answer

D. decreased oxygen in the water

Algal blooms can lead to hypoxia (low oxygen levels) when the algae die and decompose, consuming oxygen in the process. This can create "dead zones" where aquatic life struggles to survive due to low oxygen availability.