WorksheetsEcosystem Changes
Total questions: 10
Worksheet time: 3hrs 30mins
Humans are part of the ecosystem and therefore impact it. Which of the following events in an ecosystem may produce a negative effect?
Preventing deer from depleting food resources.
Restoring a natural habitat.
Wildlife rangers minimizing disturbances.
A lumber company clearing a forest.
Hunting is a environmental management tool that helps control wildlife populations. Hunting is an example of -
the deer population creating change in an ecosystem
the food web creating change in an ecosystem
humans creating change in an ecosystem
a cycle creating change in an ecosystem
A highway is built through a forest. This will most likely have which of the following effects on the organisms in the area?
Increase the number of bird species in the forest
Raise the birth rate of the animals on the forest floor
Eliminate all species of plants found in the forest
Make it difficult for animals to move through the forest
Alligators are the large predators that eat many of the smaller animals in a swamp. How might removing the alligators from a swamp habitat create a decrease in vegetation?
Meat-eating animals would begin eating plants.
The plants in the swamp would get more sunlight.
More plant-eating animals would survive.
Plants would not be able to spread their seeds.
If humans over-hunted a population of insect-eating birds, what immediate change would likely be seen in the area?
Increased seedling germination
Increased populations of insects
Migration of small mammals
Severe loss of vegetation
Raccoons eat aquatic animals. If chemicals entered the lake with rain water and destroyed the plants, how would this impact the raccoon population?
Raccoons would have less aquatic animals to eat.
Raccoons would begin eating land plants.
Raccoons would only drink water.
Raccoons would have more aquatic animals to eat.
A meadow has too many rabbits. What would help balance this ecosystem?
more rain that grass needs
fewer foxes that eat rabbits
more foxes that eat rabbits
more grass for the rabbits to eat
How would beavers building a dam cause an increase in the fish population? The dam -
causes predators to hunt more fish
removes trees from around the river.
forces many birds to leave the ecosystem.
blocks a river and creates a lake.
In a study of the habitat of a population of raccoons, scientists found that the number of raccoons actually increased where people built houses. What might the scientists conclude from this observation?
The people brought many predators to the habitat
Building houses destroyed the raccoons’ habitat
Raccoons found more food living near people
Raccoons lost their natural source of water
If humans cleared a forest and built homes where the forest once was, we would expect which of the following?
More development of soil
Fewer tree-dwelling animals
More frequent thunderstorms
Increased insect population
