Producers, Consumers, Decomposers
Food Webs & Energy Pyramids
Symbiosis
Limiting Factors & Carrying Capacity
100
This type of organism that gets energy from eating another organism
Heterotroph/Consumer
100
The amount of energy given to each trophic level from the level below is
10%
100
When ants protect a tree and the tree provides them with shelter
Mutualism
100
What are three limiting factors for plant growth?
sunlight, water, soil nutrients, space
200
One food chain in an ecosystem might be grass, a mouse, a snake and a hawk. Which one is the producer?
Grass
200
A food web is a cycle because it transfers _____ from one organism to another.
A. A chain
B. A web
C. Energy
D. Nothing
C. Energy
200
What is a close and/or long time relationship between two species?
Symbiosis
200
In an ecosystem, what is the carrying capacity?
the maximum number of individuals of a population that the environment can support
300
Which of these organisms would most likely be found at the top of an energy pyramid?
A. clams
B. sardines
C. sharks
D. kelp
sharks- a secondary consumer
300
What happens to food web when the tertiary consumer is removed/goes extinct?
The ecosystem becomes unbalanced, primary and secondary consumers compete for limited resources.
300
When a barnacle attaches itself to a whale's fin and does not affect the whale
commensalism
300
In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?
a. the robin (bird) population
b. amount of grass/flowers available
c. the amount of sunlight
d. rabbits have no limiting factors
b. amount of grass/flowers available
400
Another name for producers
Autotrophic
400
Within this food chain, grass→ grasshopper → frog → snake, which organism would we expect to have the lowest population?
Snake
400
When one species benefits (+) and the other species is harmed (-)
parasitism
400
What is the carrying capacity in this graph?
about 250
500
What is the role of decomposers in an ecosystem?
to break down and recycle energy back into the environment/food web
500
According to this food web, what organisms would be affected if the Great blue heron were to go extinct?
American alligator and Grass carp
500
Nitrogen fixing bacteria living on the roots of a legume, the bacteria get a shelter and the plants get nitrogen.
mutalism
500
Based on this graph, what is the limiting factor for the hare population?
the lynx population
(just like what we saw with the ecological pyramids, there are more primary consumers like the hare than there are top predators like the lynx)