Eutrophication

Eutrophication is

• production of excessive organic matter
• the killing of fish
• the killing of plants
• farming in Eurpoe

Eutrophication causes

• production of excessive organic matter
• the killing of fish
• water to get healthier
• farming in Eurpoe

Eutrophication is caused by

• runoff of excessive fertilizer and nutrients
• cleaning up waterways
  
• using nuclear energy
• using solar energy

How does swine farming contribute to eutrophication?

• by hog waste runoff
• by having too many pigs
• because of all of the hog food that needs to be grown
• because of the bacon grease

When excess nutrients make their way into the waterways,

• fish populations increase
• algal blooms increase
• frog population increases
• people get more vitamins in their water

Why do nitrates and phosphates cause algal blooms?

• They are critical plant nutrients.

• They kill off competition.

• Because algae grow faster than decomposers.

• Nitrates and phosphates are density independent limiting factors.

In eutrophication, dissolved oxygen levels decrease because

• decomposers use it in cellular respiration

• algae bloom and use it up

• plant nutrients react with the dissolved oxygen

• fish use it up

How does eutrophication cause the death of aquatic organisms

• the build up of carbon dioxide in the water

• the lack of nitrogen in the water

• the lack of carbon dioxide in the water

• the lack of oxygen in the water

How can an algal bloom (eutrophication) lead to a decrease in dissolved oxygen?

• Algae is a heterotroph and consumes more oxygen than it produces.

• Decreased light penetration limits photosynthesis below the surface.

• Bacteria produce oxygen as they compose dead algae and other organisms.

• Decomposers that would have produced oxygen are outcompeted by algae.

Why does fertilizer pollution stimulate the growth of algae in a pond?

• Algae are producers and use the fertilizer’s nutrients to rapidly multiply.

• Algae are producers and use the fertilizer’s nutrients during decomposition.

• Algae are parasites and absorb energy from the fertilizers in order to grow.

• Algae are herbivores that feed off of the plants, which grow due to the excess fertilizers.