Question

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

1. what is the consequence of aquatic plants (such as seaweed) being shaded under algal blooms?

a. the increase in oxygen production from algal blooms is toxic to most plants.
b. a decrease in nutrient availability will eventually kill all of the algae at the surface.
c. there is decreased carbon dioxide production and increased oxygen consumption.
d. there is reduced oxygen availability for aquatic organisms in deeper parts of the lake.
lake erie is one of the five great lakes in north scroll down to see more lake erie for recreation, more than 11
million people rely on the lake for drinking water

Explanation:

To solve this, we analyze each option:

• Option A: Algal blooms' oxygen production isn't toxic to most plants in this context. Eliminate A.
• Option B: Shading aquatic plants doesn't directly relate to nutrient availability killing surface algae. Eliminate B.
• Option C: Shading would reduce photosynthesis in aquatic plants, leading to decreased oxygen production (not carbon dioxide production decrease) and increased oxygen consumption is incorrect as plants consume CO₂. Eliminate C.
• Option D: When aquatic plants are shaded, their photosynthesis (which produces O₂) decreases. Also, when algae die, decomposition uses oxygen, reducing O₂ in deeper parts for organisms. This makes D correct.

Answer:

D. There is reduced oxygen availability for aquatic organisms in deeper parts of the lake.