[Taxacom] Test Questions (was: Panbiogeography)

[Curtis Clark]

On 2014-04-06 10:12 AM, Richard Pyle wrote:
> 4) Is anyone willing to step up to the plate to discuss cases where
> speciation seems to have occurred in the absence of geographic isolation
> (i.e., no dispersal or vicariant events required)?

The most convincing type of sympatric speciation is alloploidy, which is 
not uncommon in flowering plants, but less so elsewhere. It happens in a 
single generation, normally results in a barrier to gene flow, and the 
new species, being the result of hybridization, often has little niche 
overlap with either the parents or other species.

-- 
Curtis Clark        http://www.csupomona.edu/~jcclark
Biological Sciences                   +1 909 869 4140
Cal Poly Pomona, Pomona CA 91768