Cyanobacteria and Eutrophication Effects

The video discusses eutrophication, a process where water bodies become nutrient-rich, leading to algae blooms and reduced oxygen levels. It explains different types of trophic lakes, the process of eutrophication, and its effects like hypoxia and dead zones. The video also covers mitigation strategies, including dredging and the Clean Water Act, and concludes with a practice question.

What is the primary characteristic of an oligotrophic lake?

• High nutrient levels

• Low dissolved oxygen

• High turbidity

• High dissolved oxygen

Which type of lake is known for having a lot of nutrients and biodiversity?

• Mesotrophic

• Eutrophic

• Hypotrophic

• Oligotrophic

What is a common source of nutrients that contribute to eutrophication?

• Desert runoff

• Urban runoff

• Agricultural runoff

• Industrial runoff

What happens to fish populations during eutrophication?

• They migrate to other areas

• They remain stable

• They decrease due to lack of oxygen

• They increase due to more food

Which area is known for having hypoxia hot spots?

• Pacific Ocean

• Indian Ocean

• Atlantic Ocean

• Gulf of Mexico

What is a potential risk of cyanobacteria blooms?

• Decreased nutrient levels

• Improved water clarity

• Toxic water harmful to humans and animals

• Increased fish populations

In which region are toxic algal blooms more likely to occur?

• Western states

• Northern states

• Southern states

• Eastern states

What is one method of mitigating eutrophication?

• Increasing nutrient runoff

• Dredging the water body

• Reducing water flow

• Introducing more fish

What does the Clean Water Act regulate in relation to wetlands?

• Expansion of wetlands

• Filling of wetlands

• Destruction of wetlands

• Draining of wetlands

What is the purpose of restoring a wetland under the Clean Water Act?

• To increase urban development

• To maintain the overall area of wetlands

• To reduce biodiversity

• To create more agricultural land