How could an abundance of algae have a positive impact on an ecosystem? 1Algae grow very quickly. An abundance of algae would cover the surface of the water and provide shade for aquatic organisms.
2Algae provide carbon dioxide for many aquatic organisms. An abundance of algae would result in more available carbon dioxide.
3Algae is the food source for many aquatic organisms. An abundance of algae would mean more available food.
4Algae is a primary consumer. More algae would result in a more balanced ecosystem.

Algae is the food source for many aquatic organisms. An abundance of algae would mean more available food.

Explanation:

just cause

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.