Question

much of the nitrogen that humans add to the soil ends up in our streams, rivers, and the ocean. an increase of nitrogen in the waters can change the ph of the water, it can cause lower levels of oxygen in the water, and it can affect which organisms live there. one consequence of increased aquatic nitrogen is toxic algal blooms. what is an algal bloom?

Explanation:

An algal bloom is a rapid increase or accumulation in the population of algae in aquatic systems. It is often caused by an excess of nutrients (such as nitrogen) in the water, which allows the algae to grow and reproduce quickly. This can have significant impacts on the aquatic ecosystem, including changes to water quality and the availability of oxygen for other organisms.

Answer:

An algal bloom is a rapid increase in the population of algae in an aquatic system, often due to an excess of nutrients like nitrogen.