Final answer:
Other factors that can limit the population growth of algae include light penetration, oxygen depletion, space, predation, diseases, and temperature, even if nutrients are abundant.
Step-by-step explanation:
If the algae in an algal bloom never run out of nutrients, other factors that might limit their population growth include light penetration, oxygen depletion, space, predation, disease, and water temperature.
Algal blooms can reduce light penetration, making it difficult for photosynthetic plants to survive. This leads to a chain reaction where the lack of plants causes oxygen depletion in the water as the algae die and decompose.
Over time, the lack of space can also hinder further growth. Additionally, predation by other organisms, diseases, and unsuitable temperatures can limit the size of algal populations.