sympatric speciation


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sympatric speciation

the occurrence of species formation without geographical isolation, genetic isolation occurring through other mechanisms.
References in periodicals archive ?
If we can figure out how sympatric speciation can happen in a tiny crater lake, then we have to ask ourselves whether we think the same thing can happen on continents and in oceans, where most species live,' he says.
Even so, these morphs (species) may also have arisen through sympatric speciation by stochastic changes in the apparently labile reprodu ctive systems and may have become niche differentiated only after speciation.
harrasonii appear to be distinct and often have overlapping ranges, this suggests that these three taxa may have evolved via a classic sympatric speciation scenario.
1994), mechanisms of true sympatric speciation have been suggested as well (reviewed in Martens 1997).
As far as we are aware, Shoemaker and Ross are the first to demonstrate that social behavior influences sympatric speciation," assert Ross H.
Because mechanisms of sympatric speciation typically require resource or habitat specialization at species formation, sympatric speciation tied to such specialization in theory provides an automatic mechanism of coexistence.
Futuyma cautions that the evidence for sympatric speciation is not always compelling, but he acknowledges that several cases discussed in the preceding chapters do make it likely that sympatric speciation has occurred in some phytophagous insects, as well as in some non-insect groups.