Sentence examples for demonstration of speciation from inspiring English sources

The great evolutionary biologist Ernst Mayr called such situations the 'perfect demonstration of speciation' [ 2] since they allow one to use geographic variation to infer how evolutionary change in time led to the differences between species.

In the mid 20th century, Ernst Mayr and Theodosius Dobzhansky championed the significance of circular overlaps or ring species as the perfect demonstration of speciation, yet in the over 50 years since, only a handful of such taxa are known.

This large number was quite unexpected because traditionally cichlids have been thought to be guided primarily by vision (Fryer and Iies 1972) with respect to behaviors including predator avoidance, feeding, and social interactions, as illustrated by the recent demonstration of sensory-driven speciation (Seehausen et al. 2008).

"It's a nice demonstration of how the initial speciation of one organism opens up an opportunity for another species," Dr. Feder said in a statement.

Our speciation rate analyses also demonstrated more rapid speciation amongst vector species than non-vectors, and rates of speciation in Anophelinae twice as fast as those in Culicinae (Supplementary Table 2).

Ecological causes of speciation.

Evidence for this kind of speciation has been incomplete, however.

Rates of speciation in the fossil record.

Mechanisms of speciation — a population genetic approach.

But unexpectedly, evolution of chemical defences also increases extinction rates -- even above the rate of speciation.

How much genetic differentiation accompanies the process of speciation.