In addition to size-specific mating, a process called disruptive selection is also necessary for sympatric speciation to occur, Jones said.

IIT Bombay study reveals how sympatric speciation can occur without geographic barriers, challenging traditional views on speciation.

Under which circumstances is sympatric speciation possible? An answer to this long-standing question of evolutionary biology has turned out to be challenging. In particular, models for the ...

Darwin suggested that the action of natural selection can produce new species, but 150 years after the publication of "On the Origin of Species" debate continues on the mechanisms of speciation ...

How Does Speciation Drive Evolution? The process of speciation allows a single species to diverge into two. Dive into the different versions of this process, including “allopatric speciation” and ...

Darwin suggested that the action of natural selection can produce new species, but 150 years after the publication of "On the Origin of Species" debate continues on the mechanisms of speciation ...

I. Allopatric vs. sympatric speciation II. Sexual selection and speciation III. Islands as "natural laboratories" for exploring speciation IV. Species concepts -- biological vs. phylogenetic V.

Speciation mostly happens as a by-product of the same processes that lead to evolutionary change within populations: natural selection or genetic drift.

In a world without natural selection and no vast mountain ranges dividing populations, one might expect biodiversity to remain forever stagnant. But according to a study published this week in Nature, ...

However, sympatric speciation is often considered to be a very rare, freak event that is unlikely to have made a significant impact on current patterns of biodiversity.

Our results show two scenarios for the A. Citrinellus speciation process, one with and the other without disruptive natural selection.

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.