What causes character displacement?
What causes character displacement?
Evolution and Competition Character displacement results from selection for traits that reduce the overlap in resource use with a similar species. If two or more competing species evolve in response to one another, character displacement can be considered a type of coevolution.
What is individual specialization?
The phrase “individual specialization” can designate either the overall predominance of individual specialists in a population or the degree to which individuals’ diets are restricted relative to their population.
What is ecological compression?
The compression hypothesis states that when one species invades the range of another, both species should decrease the number of habitat types but increase (or hold constant) the number of prey types utilized (MacArthur and Pianka 1966; MacArthur and Wilson 1967).
What is exploitative competition?
Exploitation competition occurs when individuals interact indirectly as they compete for common resources, like territory, prey or food. Simply put, the use of the resource by one individual will decrease the amount available for other individuals.
Under which of the following conditions are you most likely to find character displacement?
We highlight two necessary conditions for character displacement in sympatry: (i) very strong premating isolation between the two populations, and (ii) secondary contact to occur at an evolutionary branching point.
What is character displacement?
Character displacement is the term used to describe an evolutionary change that occurs when two similar species inhabit the same environment. Under such conditions, natural selection favors a divergence in the characters–morphology, ecology, behavior, or physiology–of the organisms.
What is individual foraging?
individual foraging specialists are individuals with. narrower foraging niches than the population’s niche. (Roughgarden 1972, West 1986, Werner and Sherry. 1987, Holbrook and Schmitt 1992, reviewed by. Bolnick et al.
What is an example of specialization in economics?
When an economy can specialize in production, it benefits from international trade. 1 If, for example, a country can produce bananas at a lower cost than oranges, it can choose to specialize and dedicate all its resources to the production of bananas, using some of them to trade for oranges.
What is an example of ecological release?
Another common example of ecological release can occur if a disease or a competitor or a keystone species, such as a top predator, is removed from a community or ecosystem.
What is niche width and overlap?
Drawing on niche theory, we characterize an organization’s position along two dimensions: niche width, a function of the relatedness among the resource spaces an organization inhabits; and niche overlap, a function of the number of competitors occupying the similar spaces.
What are some examples of exploitation?
Types of Exploitation
- Sexual Exploitation. This is when someone is deceived, coerced or forced to take part in sexual activity.
- Labour Exploitation.
- Domestic Servitude.
- Forced Marriage.
- Forced Criminality.
- Organ harvesting.