Biodiversity Pre/Post

If there were fewer insects to pollinate plants on Earth, what would be the biggest concern for humans?

• Crops might not get pollinated, and there could be a food shortage.

• Honey could become more expensive.

• There could be fewer roses available on Valentine’s Day.

• People who work for pest control companies might lose their jobs.

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Biodiversity

• The proper disposal of used resources so they can be reprocessed into new products

• The number of different species of plants and animals in an area

• Source or supply from which benefit is produced

• Relating to the ocean

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The ecosystem with the greatest biodiversity is the one that has the greatest:

• variety of living things.

• average annual rainfall.

• coverage of land area.

• elevation above sea level.

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Changes to an ecosystem’s biodiversity can have a direct effect on humans because humans –

• inhabit all areas of the Earth’s ecosystems.

• use minerals from the ground to make things

• rely mostly on solar power for energy.

• depend on the Earth’s natural resources.

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If an area has all the wolves that it can support, the wolf population has reached its _______________________.

• limiting factor
• carrying capacity
• emmigration
• immigration

A flood that covers a meadow and drowns animals and a late frost that kills young plants are examples of how ____________ can affect the size of a population.

• space
• food
• weather
• growth

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What is an invasive species?

• A native (naturally found) species which are added to an area. 
• A non-native (not naturally found) species added to an area. 
• A keystone species in an environment
• none of the above

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A drought has hit this grassland biome. How will this effect the rabbit population?

• The rabbits will increase in number.
• The rabbit population will stay the same.
• The rabbit population will decrease.
• The rabbit population will become extinct immediately.

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Competition can occur between organisms for both biotic and abiotic resources.  Competition for biotic resources can be illustrated by organisms fighting for a limited amount of –

• air to breath
• mates for breeding
• water to drink
• space for nesting

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Which organisms in the food web shown to the right are predators that compete for the same prey in this environment?

• Coyotes and rabbits
• White-tailed deer and rabbits
• Leafy weeds and cotton rats
• Bobcats and coyotes

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