Human Impacts

What is an effect of eutrophication?

• Nutrient overload leads to algae overgrowth and oxygen levels decrease in the water

• The plants below still get sun through the thick layer of algae, so nothing will happen

• The algae allow the plants underneath to grow better because the sun is not shining on them anymore.

What is NOT a consequence to overfishing?

• Increased biodiversity

• Less biodiversity, making the ocean weaker when it comes to changes or stresses

• Less food throughout the food chain and trophic cascades.

What is NOT true about invasive species?

• They have no natural predators in the new environment

• The reproduce well and take over quickly

• They help the native species become more diverse

• They kill native species and cause trophic cascades.

Which is NOT a way to decrease the effects of global warming?

• Reforest areas that are bare due to human activity

• Create conservation areas to protect the plants there

• Increase unsustainable farming practices that cause desertification

• Increase the use of renewable resources that don't burn fossil fuels.

How would the stress of extinction in one insect affect the rainforest where biodiversity is high?

• One species would not collapse the whole ecosystem

• This loss would destroy the entire thing

Which is NOT an effect of burning fossil fuels for energy?

• Increased CO2 in the atmosphere

• Health issues in humans

• Climate change that could decrease biodiversity

• More animal habitat

What is NOT an effect of deforestation?

• Increased Oxygen

• Less absorbed CO2

• Decrease in Biodiversity

• Habitat loss