What is the geographic mosaic theory?

What does the geographic mosaic theory predict about coevolutionary outcomes?

The geographic mosaic theory of coevolution predicts that hot and cold spots, selection mosaics and trait remixing should result in the three major patterns of coevolution described above.

Who came up with the geographic mosaic theory of coevolution?

John N. . xii + 443 pp.

What is a selection mosaic?

Geographic selection mosaics occur when a fitness function of coevolutionary selection (dependence of fitness on G x G) differs among environments (E) (i.e., there is a genotype by genotype by environment interaction [G x G x E] for fitness of at least one of the two species).

Why is reciprocal selection important?

Coevolution, or reciprocal selection, is when each of two interacting species affects the fitnesses of phenotypes in the other species. Mutualistic coevolution is when both species receive a benefit from the coevolutionary relationship. This can become an obligate (required) trait.

What is the theory of mosaic coevolution?

Geographic mosaic theory of coevolution, in ecology, the theory postulating that the long-term dynamics of coevolution may occur over large geographic ranges rather than within local populations. … In still other populations the two species may continue to coexist but coevolve in different ways.

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What does geographic variation mean in biology?

Geographical variation refers to differences among populations in genetically based traits across the natural geographic range of a species. Understanding the factors that give rise to and maintain geographical variation helps elucidate the causes and consequences of evolution.

How does coevolution happen?

The term coevolution is used to describe cases where two (or more) species reciprocally affect each other’s evolution. … Coevolution is likely to happen when different species have close ecological interactions with one another. These ecological relationships include: Predator/prey and parasite/host.

What is coevolution and why is it important?

Abstract. Coevolution plays a key role in shaping the biodiversity on Earth. Coevolution is commonly defined as reciprocal evolutionary changes brought about by interactions between species, implying that interacting species impose selection on each other.

Is Directional a selection?

Directional selection occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. … Directional selection does the “heavy lifting” of evolution by tending to move the trait mean toward the optimum for the environment.

What is an example of intersexual selection?

Intersexual selection occurs as a result of interactions between males and females of a species. One sex, typically males, will develop and display traits or behavior patterns to attract the opposite sex. Examples of such traits include plumage on birds, the mating calls of frogs, and courtship displays in fish.