AP Environmental Science : Niches
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Example Questions
Example Question #21 : Ecosystem Development And Relationships
Some plant species require their seeds to be "activated" by high temperatures, and only sprout after a forest fire. Given this, where in the succession must these species be placed?
Secondary succession
Primary succession
Pioneer species
Declining community
Climax community
Primary succession
A plant that starts to sprout directly after a disturbance such as a forest fire is a primary successor. These plants are called pioneer species, but their location in the succession is in the primary spot (one example of such a species is the Yosemite Sequoia.)
Example Question #31 : Ecosystem Development And Relationships
A group of species that share common food sources avoid competition by living in different locations. Of which of the following is this an example?
Niche Partitioning
Island Biogeography
Natural Selection
Habitat Fragmentation
Speciation
Niche Partitioning
The competitive exclusion principle states that two species cannot occupy the same niche without one of them driving the other extinct. Thus, species either occupy a slightly different niche, or occupy a different physical location from one another, an evolutionary strategy known as niche partitioning.
Example Question #32 : Ecosystem Development And Relationships
Two similar birds live in the same tree, but consume differently sized insects. What is this an example of?
Speciation
Resource partitioning
Competitive exclusion
Natural selection
Niche partitioning
Resource partitioning
Because two species cannot exist within the same niche, if they are to occupy the same geographic space, they must use different resources, or one of them will be driven to extinction. This practice is known as resource partitioning.
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