Environmental Impacts and Ecosystem Changes

The video discusses environmental changes in ecosystems, focusing on natural events and human activities that impact ecosystems. It covers topics like drought, deforestation, overgrazing, soil fertilization, forest fires, overhunting, and the introduction of invasive species. Each cause is explained with its effects on ecosystems, highlighting both positive and negative impacts. The video emphasizes the need for organisms to adapt, migrate, or face extinction due to these changes.

What are some of the causes of environmental changes in ecosystems?

• Only natural events

• Only human activities

• Natural events, organism interactions, and human activities

• None of the above

What is a major consequence of a prolonged drought?

• Increase in plant growth

• Rise in lake levels

• Decrease in water availability for animals

• Improved fish habitats

How does deforestation primarily affect forest animals?

• Increases their food supply

• Improves their oxygen supply

• Provides more shelter

• Destroys their habitat

What is a negative impact of building highways through forests?

• Improves animal habitats

• Destroys animal and plant habitats

• Reduces human transportation

• Increases plant diversity

What is overgrazing and its effect on ecosystems?

• Too many carnivores eating herbivores

• Too many herbivores eating plants, reducing producers

• Too many predators in the ecosystem

• Too many plants growing uncontrollably

How can fertilizing soil negatively impact aquatic life?

• By causing soil erosion into water bodies

• By increasing oxygen levels in water

• By reducing plant growth on land

• By improving water clarity

What is a positive effect of forest fires?

• Destruction of all plant life

• Opening seeds for new plant growth

• Permanent loss of animal habitats

• Increase in air pollution

What is a consequence of overhunting and overfishing?

• Stabilization of food chains

• Increase in biodiversity

• Extinction of certain species

• Improved food supply for all organisms

How do invasive species affect native species?

• By improving their habitats

• By decreasing native species through competition

• By providing more food

• By increasing their population

What happens when a new plant like Kudo spreads over native plants?

• Native plants grow faster

• Native plants thrive

• Native plants receive more sunlight

• Native plants decrease due to lack of resources