Name: ___________________________________________ Per: _________
Review: Populations & Ecosystems Test on Lessons 1-6
Complete Review for Homework - Due on Friday
Test on Thursday November 15th
1. The cold, salty waters of the Puget Sound marine ecosystem are full of life. The following
food chains exist in Puget Sound:
a. Phytoplankton (a plant that grows in the sea) are eaten by zooplankton
b. Zooplankton (tiny microscopic animals) are eaten by many different types of small
fish
c. Small fish are eaten by Salmon
d. Salmon are eaten by Orcas
e. Many types of bacteria live in the cold waters
Directions: In the space below, draw a food web for the organisms in the food chains above.
Then, directly below it, draw an energy pyramid that shows how the energy is transferred through
the ecosystem. Be sure that you include the names of the trophic levels along with the names of
the organisms.
2. In the Puget Sound energy pyramid described on the previous page, identify an organism or
example for each ecological term. Then explain how you knew that the organism or example you
chose is correct.
Ecology Term
and Organism or Example
EXPLAIN or DEFINE why You Chose this as an Example
A Population is
A Community is
The type of Ecosystem is
A Producer is
A Consumer is
An Abiotic factor is
How could this abiotic factor affect the organisms in the small
ecosystem:
3. What is the source of all energy for all ecosystems on Earth? _____________How does this
energy enters the Puget Sound ecosystem and travel up the energy pyramid to the Orcas?
4. Name two biotic limiting factors and two abiotic limiting factors for any ecosystem.
Biotic
Abiotic
1)
1)
2)
2)
5. Name one limiting factor for Puget Sound _____________________________
How does this limiting factor control the population?
6. Why is the energy pyramid a more accurate way to show energy transfers in an ecosystem?
List and describe two ways the pyramid is more accurate.
7. What is biomass?
8. ________ % of the energy is stored as biomass at one trophic level for use by the next trophic
level.
9. The rest of the energy is used __________________________________________________
____________________________________________________________________________.
10. How is biomass recycled through an ecosystem? Explain the two ways and give an example.
11.In Mono Lake, the coyote is a tertiary consumer (3rd level consumer). How many kg of
producers is needed to support 1kg of the coyote? (Coyotes eat birds such as gulls, birds eat
brine shrimp and flies, brine shrimp and flies eat two types of algae)
12.Coyotes actually have a mass of about 27kg. How many kg of producers is needed to support
1 coyote?
13.If you wanted to calculate the reproductive potential of a population, name at least four things
you would need to know about that organism.
1)
3)
2)
4)
14. True or False: As the seasons change, the number of individuals in a population will rise and
fall in a healthy ecosystem.
15.Scientists decide that they want the gull population to increase, so they trap and take the Mono
Lake coyote population to another national park. Describe the benefits AND problems that
might be caused by removing the coyotes.
16.Label which line shows the producer, herbivore, and predator.
Population #
Time (# of years)
17.Explain why you placed the organism where you did in the graph.