26 Questions
What is the term that describes when one species prevents another from occupying a niche by being superior?
Competitive exclusion
Which term is used to describe the change in behavior of one species due to resource use or allocation by another species?
Character displacement
In the context of species interactions, what does exploitation refer to?
Stealing food from other species
What is the trait that is useful for doing certain things, such as birds eating seeds?
Beak size
What does the K curve represent in the context of animals and their traits?
Expected density of trait sizes in animals
What does the example of beak size distribution in finches illustrate?
How many of a certain trait in a certain population
What term is used to describe an evolutionary change that occurs when two similar species inhabit the same environment?
Character displacement
Where does character displacement usually occur?
In sympatric populations
What is the term used to describe populations, varieties, or species that occur in the same place at the same time?
Sympatry
In which type of population do individuals have overlapping geographic ranges?
Sympatric populations
What does the term 'allopatry' refer to?
Individuals living apart
What can lead to character displacement between two similar species?
Resource scarcity and competition
What is the outcome of character displacement between two similar species?
Divergence in traits and resource use
What ecological phenomenon is observed when two sympatric species evolve to occupy different ecological niches?
Resource partitioning
What is an example of adaptive radiation in the text?
Evolutionary diversification of stickleback fish
What is the purpose of growing fish in the lab and putting them in cages in different areas of the lake?
To study the trade-offs of living together
What is indicated by the separation of gill raker length when both limnetic and benthic species of fish occur together?
Competition between the two species
What is the effect of predation on the first dorsal spine of stickleback fish?
Increases in frequency
What does the variation in beak sizes of finches across different islands illustrate?
Pattern of character displacement at community level
What is indicated by the lack of overlap of canine diameter across different weasel species?
Trait overdispersion due to competition
What is suggested by the change in beak size during and after droughts among different species of finches?
Patterns of character displacement influenced by environmental changes
What is indicated by the direct result of the second drought on beak size evolution?
Decreased bill size in G. magnirostris due to competition with G. fortis with big beaks
What does the lack of overlap of canine diameter across different weasel species suggest?
Trait overdispersion due to competition
What does the variation between limnetic and benthic stickleback fish in response to predation indicate?
Competition and potential character displacement
What is suggested by the change in behavior and traits of stickleback fish in response to different combinations of species?
Trade-offs for living together
What does the pattern of character displacement among different species of finches illustrate?
Competitive interactions leading to trait divergence
Test your knowledge of competition in ecology and the concept of competitive exclusion. Explore how species prevent each other from occupying niches and the mechanisms behind it, including exploitation and behavior displacement.
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