Biodiversity and Keystone Species

What are ecosystem services?

• Only the water purified by ecosystems

• Services provided by humans to ecosystems

• Benefits people obtain from ecosystems

• Only the food produced by ecosystems

Tags

NGSS.MS-LS2-5

Which of the following is a provisional ecosystem service?

• Recreational activities

• Food production

• Nutrient cycling

• Climate regulation

Tags

NGSS.MS-LS2-5

What percentage of Earth's land surface is occupied by cropland and pastures?

• 60%

• 40%

• 10%

• 25%

What is the main focus of the article?

• The relationship between soil biodiversity and ecosystem services

• The impact of climate change on marine life

• The benefits of urbanization

• The history of agriculture

Tags

NGSS.MS-LS2-5

Which of the following is a cultural ecosystem service?

• Aesthetics

• Soil formation

• Water purification

• Nutrient cycling

What is the estimated annual value of ecosystem services provided by Earth's biodiversity?

• Billions of US dollars

• Trillions of US dollars

• Millions of US dollars

• Hundreds of US dollars

Tags

NGSS.MS-LS2-5

What is bioturbation?

• The cycling of nutrients by biota

• The transfer of carbon between global pools

• The breakdown of complex organic compounds

• The physical rearrangement of soil particles by fauna and plant roots

Tags

NGSS.MS-ESS2-2

Which of the following is a key functional group in soil biota?

• Omnivores

• Carnivores

• Herbivores

• Microsymbionts

Tags

NGSS.MS-LS2-4

What is the role of earthworms in soil ecosystems?

• They fix nitrogen from the air

• They fragment litter and enhance soil structure

• They produce food for humans

• They regulate climate patterns

Tags

NGSS.MS-LS2-3

What is the 'Portfolio-effect' in biodiversity?

• The concept that all species have the same impact on ecosystem functioning

• The belief that only a few species are important for ecosystem stability

• The theory that biodiversity has no effect on ecosystem services

• The idea that more diverse communities are more stable

Tags

NGSS.MS-LS2-5