Question

how can humans help when algae blooms?
how can humans help when algae blooms?

1. how can we make technologies like epilimnetic and hypolimnetic circulation work better to stop algal blooms?

a. reduce oxygen levels in lakes during heavy blooms to control algal reproduction
b. add more nutrients to help algae grow so that they can replace aquatic plants lost to the bloom
c. combine epilimnetic and hypolimnetic circulation devices with sustainable practices such as nutrient management strategies
d. build more epilimnetic and hypolimnetic circulation devices as agriculture continues to contribute increasing fertilizer to the ecosystem
lake erie is one of the five great lakes in north... lake erie for recreation, more than 11 million people rely on the lake for drinking water

Explanation:

• Option A: Reducing oxygen levels would harm aquatic life, not help stop algal blooms (algae often thrive in low - oxygen in some cases, but reducing oxygen isn't a solution for stopping blooms).
• Option B: Adding more nutrients would fuel algal growth, worsening the bloom, not stopping it.
• Option C: Combining these circulation devices with sustainable practices like nutrient management (which reduces the nutrient load that causes blooms) makes sense. Using the technology along with practices that address the root cause (excess nutrients) will be more effective.
• Option D: Building more devices while agriculture adds more fertilizer (increasing nutrient input) would be counterproductive as the root cause of more nutrients isn't addressed.

Answer:

C. combine epilimnetic and hypolimnetic circulation devices with sustainable practices such as nutrient management strategies