Sentences with phrase «sympatric speciation»

«I think it's probably one of the best, and only, examples of sympatric speciation in birds,» says Robert Zink of the University of Minnesota, Twin Cities.

Evolutionary biologists have long argued about whether it's possible for a new species to arise in a population that isn't separated by geographic barriers, such as an ocean or a mountain range — a process called sympatric speciation.

But evidence for sympatric speciation is growing, from mole rats in Israel to palms on Lord Howe Island, Australia, and apple maggots evolved from hawthorn maggots in North America, leading some evolutionary biologists to think it could be surprisingly common.»

Because neither allopatric nor sympatric speciation require the extinction of the parent species.

Scientists call the research a convincing example of how species can develop within overlapping ranges — a process known as sympatric speciation.

Sympatric speciation occurs when new species emerge without separation, such as the 13 species of Galapagos finch or Africa's cichlid fish.

But a number of recent theoretical studies have suggested that so - called sympatric speciation can occur, in which different populations originate in one geographical area, but do not interbreed.

Or they can evolve to mate in different places, for example on two different types of fruit, as in the example given above for sympatric speciation.

1 Word - just what is it about allopatric or sympatric speciation that necessitates the extinction of the stem species?

The species of wheat that we in the West use for bread only developed in the last few thousand years as a result of two episodes of sympatric speciation (different to selective breeding, but an agent of evolution none the less) and the various Shiraz, Char.donnay and Pinot Noir gra.pes we enjoy today, in the form of wine, were all developed and perfected in the last 100 years or so.

There are three main ideas concerning the emergence of new species (Modes of Speciation), each based on the degree to which populations undergoing this process are geographically isolated from one another (allopatric speciation, sympatric speciation, parapatric speciation).

This phenomenon, called sympatric speciation, is very rare in animals.

Additionally, assortative mating has been proposed as a mechanism for hybrid and sympatric speciation.

Especially in marine environments, sympatric speciation might be common; our results raise questions about how genetic divergence can be established.

«Exploitation of the same habitat, but key differences at important times of the year, suggests that competition between a single species works to preserve the different phenotypes we observed - whilst simultaneously creating the potential for so - called sympatric speciation, i.e. the potential for a new species to form without geographic isolation,» says Hawley.

In the case of sympatric speciation, members of a species continue to live side by side, but still separate into different species.