Impacts of Human Activity on Ecosystems

What are the four categories of services that ecosystems provide for us?

• Support, Provisioning, Regulating, Cultural

• Recycling, Provisioning, Moderating, Cultural

• Support, Provisioning, Moderating, Awesome

• Recycling, Provisioning, Regulating, Awesome

What is the estimated cost of the ecosystem services provided for humanity?

• $66 billion/year

• $46 trillion/year

• $66 trillion/year

• $46 billion/year

Why is biodiversity important for ecosystems?

• It increases the number of rocks and weather in the ecosystem

• It has no impact on the ecosystem

• It makes ecosystems more resilient to change

• It reduces the services provided by ecosystems

What is the impact of deforestation on neighboring ecosystems?

• Increased erosion and desertification

• Improved water quality and desertification

• Increased flooding and erosion

• Decreased flooding and improved water quality

What is the primary driver of global warming?

• Overgrazing

• Deforestation

• Burning fossil fuels

• Desertification

What is the term for the spread of dry, unproductive landscapes due to overgrazing and over-irrigation?

• Pollution

• Erosion

• Desertification

• Deforestation

What is the impact of introducing nonnative species to an ecosystem?

• It increases biodiversity

• It improves the resilience of the ecosystem

• It out-competes or eats native species

• It has no impact on the ecosystem

What is the most direct impact of human activity on biodiversity?

• Overfishing

• Pollution

• Introducing nonnative species

• Deforestation

What is the main cause of desertification in China?

• Overgrazing and the cities' unquenchable thirst for water

• Deforestation and over-irrigation

• Burning fossil fuels and overgrazing

• Introducing nonnative species and overfishing

What is the term for putting the wrong amounts of certain stuff in the wrong place at the wrong time?

• Deforestation

• Desertification

• Erosion

• Pollution