Show:
Effects on a Food Web
Energy Transfer
Changes in a Population
Vocabulary
Interactions in an Ecosystem
100
What will happen to the Grass Population if the Deer Population increases?
If the Deer Population increases, the Grass Population will decrease because there are more Deer eating the Grass.
100
How much energy is transferred from one trophic level to another trophic level?
10% of the energy in one trophic level gets transferred to the next trophic level.
100
How do you find the Birth Rate of a population?
Births divided by Population multiplied by 100. Birth Rate = (Births/Population) X 100
100
What is the Definition of a Species?
A group of living things that share genetic and physical characteristics and can mate with one another to produce young.
100
What is one way Producers and Consumers Interact?
Consumers interact with Producers when the Consumers eat the Producers. OR Consumers interact with Producers when they breathe the Oxygen that Producers create. OR Consumers interact with Producers when they give off Carbon Dioxide (CO2) that Producers breathe.
200
What will happen to the Fox Population and the Grass Population if the Rabbit Population decreases.
If the Rabbit Population decreases, the Fox Population will decrease because they have less Prey. If the Rabbit Population decreases, the Grass Population will increase because there are more Rabbits eating the Grass.
200
What is one of the two ways to figure the amount of energy transferred from one trophic level to another trophic level?
Multiply by 0.1 OR Divide by 10
200
How do you find the Death Rate of a Population?
Deaths divided by Population multiplied by 100. Death Rate = (Deaths/Population) X 100
200
What is a Producer?
A Producer is a living thing that can use sunlight and Nutrients from soil and water to produce its own food. Plants are Producers.
200
What is one way that Consumers interact with Decomposers?
Consumers interact with Decomposers when they create waste (poopy) for the Decomposers to break down (eat). OR Consumers interact with Decomposers when they die and are broken down into Nutrients by the Decomposers.
300
What are two populations that would be affected if the Elk Population decreases? Why would these populations be affected?
If the Elk Population decreases, then the Grass Population will increase because there are less animals eating it. If the Elk Population decreases, then the Aspen Tree Population will increase because there are less animals eating it. If the Elk Population decreases, then the Wolf Population will decrease because there are fewer sources of Prey.
300
Why doesn't all of the energy get transferred from one trophic level to another trophic level?
Most of the energy (90%) gets used by the organism.
300
What is the Birth Rate if there are 24 Births in a Population of 100? Show your work.
Birth Rate = (24/100) X 100 Birth Rate = (0.24) X 100 Birth Rate = 24%
300
What is a Primary Consumer? What is another name for a Primary Consumer?
A Primary Consumer is an animal that feeds on Producers (plants). Primary Consumers are also known as Herbivores.
300
What are two ways that Decomposers and Producers interact?
One way that Decomposers interact with Producers is by breaking down Consumers to create nutrients for Producers to use. AND Another way that Decomposers interact with Producers is by creating Carbon Dioxide (CO2) for Producers breathe.
400
What would happen to the Food Web if the Grass Population was removed from the Ecosystem?
The Rabbit Population, Deer Population, and Elk Population would decrease because there are fewer Producers for them to eat. The Fox Population and Wolf Population would decrease because there are smaller populations of their Prey (Rabbits, Deer, Elk).
400
How much energy would get transferred to the Primary Consumer level if there is 250 Calories at the Producer level?
There would be 25 Calories transferred to the Primary Consumer Level.
400
What will happen to a Population if the Birth Rate is larger than the Death Rate? What will happen to a Population if the Death Rate is larger than the Birth Rate?
If the Birth Rate is larger than the Death Rate a Population will increase. If the Death Rate is larger than the Birth Rate a Population will decrease.
400
What is a Secondary Consumer? What is another name for a Secondary Consumer?
A secondary consumer is an animal that feeds on Primary Consumers. A Secondary Consumer is also called a Carnivore.
400
How does Matter cycle in an Ecosystem?
Matter goes from Producers to Consumers when they eat the Producer. Matter then travels from Consumers to Decomposers when they die. The Matter goes from Decomposers to Plants when the Decomposers break down Consumers into Nutrients. The cycle repeats when the Producers use the Nutrients and sunlight to grow.
500
What would happen to the Food Web if Mountain Lions were introduced (added) to the Ecosystem.
The Rabbit Population, Deer Population, and Elk Populations would all decrease because the Mountain Lions would be another Predator eating them. The Fox Population and the Wolf Population will also decrease because there is less Prey for them to eat. The Grass Population and the Aspen Tree Population will increase because there are less animals (Rabbits, Deer, Elk) eating the Grass.
500
How much energy would get transferred to the Tertiary Consumer Level if there is 67,000 Calories at the Producer Level?
There would be 67 Calories transferred to the Tertiary Consumer Level.
500
What will happen to a Population if there are 7 Births and 9 Deaths in a Population 50? Show your work.
Birth Rate = (7/50) X 100 Death Rate = (9/50) X 100 Birth Rate = (0.14) X 100 Death Rate = (0.18) X 100 Birth Rate = 14% Death Rate = 18% The Population will decrease.
500
What are Decomposers?
Decomposers are worms, bacteria, and other creatures that break down the bodies of dead plants and animals to create nutrients in soil and water.
500
Why is the Sea Otter a Keystone Species in the Kelp Forest Ecosystem?
The Sea Otter is a Keystone Species in the Kelp Forest Ecosystem because they keep the Ecosystem from falling apart. The Sea Otter eats the Sea Urchins and keeps them from overpopulating. If the Sea Urchins overpopulate they would eat all of the Kelp and there would not be a habitat for all of the other organisms.