Ecosystem Interactions

What would likely be the result if a pesticide is used to reduce the # of harvester ants?

• an increase in snakes & a decrease in hawks
• a decrease in snakes & an increase in hawks
• a decrease in mesquite bushes & an icnrease in horned lizards
• an increase in mesquite bushes & a decrease in horned lizards

A decrease in the frog population would MOST likely lead to an increase in the population of which organisms?

• owl
• grass
• snake
• grasshopper

How would a drought in the Southern Plains most likely affect the quail population?

• an increase in the quail population due to a decrease in the rabbit population
• a decrease in the quail population due to a decrease in nesting cover
• an increse in the quail population due to a decrese in the mouse population
• all of these

What is INTERDEPENDENCE?

• The way plants don't need animals

• The way animals can survive alone

• The mutual dependence between living things.

• The way everything lives by itself

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How would a sudden severe drop in temperature be likely to affect a population of rabbits?

• They would all die

• The population would decrease

• The population would increase

• The population would increase very, very quickly

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Humans cut down a forest how would this affect bird populations that lived in the forest?

• They would all die

• The populations would decrease

• The populations would increase

• Some would increase and some would decrease

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The diagram above represents relationships in an

ecosystem. What is the primary source of energy in

this environment?

• cellular respiration in the plants

• energy from minerals in the soil

• fossil fuels

• solar energy

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Which organisms compete for the same food?

• Rabbits and mice
• Rabbits and foxes
• Mice and grasshoppers
• Grasshoppers and owls

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Which organism do the owl and the weasel compete for in the food web?

• Hawk
• Spider
• Grasshopper
• Shrew

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What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.
• The number of primary consumers would increase.
• The number of plants would increase.
• The number of secondary consumers would increase.

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