Water Ecosystems

The video explores how temperature changes affect humans and animals, highlighting adaptations like thicker coats, hibernation, and migration. It discusses the impact of temperature on aquatic ecosystems, where fish seek deeper waters for stable temperatures. The video also covers the negative effects of chemicals like DDT and acid rain on water ecosystems, emphasizing the importance of producers in food webs. The conclusion reviews the challenges faced by aquatic ecosystems, which cover 70% of the Earth.

How do animals typically respond to cold weather conditions?

• By wearing extra layers

• By using sunscreen

• By staying indoors

• By growing thicker coats or migrating

What do fish do when water temperatures rise in the summer?

• They swim to shallower waters

• They migrate to colder regions

• They swim to deeper waters

• They stop moving

Which of the following is a negative effect of DDT on aquatic ecosystems?

• It helps fish grow faster

• It poisons fish and predatory birds

• It cleans the water

• It increases water temperature

What is a major cause of acid rain?

• Excessive fishing

• Overuse of fertilizers

• Air pollution from industries

• Natural water evaporation

How does acid rain affect aquatic ecosystems?

• It increases fish population

• It negatively impacts water plants and the food chain

• It enhances plant growth

• It stabilizes water temperature