ES 8.2 8.3 Quiz

What percentage of the world's grasslands are grazed by cattle, sheep, and goats?

• 42%

• 50%

• 60%

• 70%

What is the main consequence of overgrazing on grasslands?

• Increased plant diversity

• Improved soil health

• Reduced grass cover and soil erosion

• Enhanced water retention

Which of the following is NOT a method to prevent overgrazing?

• Rotational grazing

• Increasing the number of grazing animals

• Fencing off certain areas

• Planting domesticated grasses

What happens to rangeland grass when only the upper portion of the blade is eaten?

• It dies completely

• It becomes a non-renewable resource

• It regrows rapidly

• It loses its ability to hold water

What is one method mentioned for preventing overgrazing in rangelands?

• Rotational grazing

• Permanent fencing

• Increasing livestock numbers

• Using pesticides

Why are land trust groups paying ranchers to establish conservation easements?

• To ensure future owners will not develop the land

• To increase the number of livestock

• To promote large-scale development

• To encourage the use of herbicides

What is a cheaper method to discourage unwanted vegetation in rangelands?

• Controlled, short-term trampling by livestock

• Using expensive herbicides

• Building permanent structures

• Increasing the frequency of grazing

What is one of the main challenges faced by the world's national parks according to the passage?

• Invasion of harmful nonnative species

• Lack of visitor interest

• Excessive government funding

• Overpopulation of native species

Which of the following is a reason why parks in less-developed countries struggle to protect biodiversity?

• Lack of financial resources and personnel

• Abundance of natural resources

• Strict enforcement of park regulations

• High levels of tourism

What illegal activities are mentioned as occurring in some national parks?

• Logging, mining, and poaching

• Fishing, farming, and tourism

• Construction, urban development, and pollution

• Scientific research, education, and conservation