期刊
JOURNAL OF EVOLUTIONARY BIOLOGY
卷 22, 期 11, 页码 2342-2347出版社
WILEY
DOI: 10.1111/j.1420-9101.2009.01833.x
关键词
allopatry; cruising range; deme; ecological speciation; gene flow; migration rate; parapatry; selection; sympatry
资金
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0832858] Funding Source: National Science Foundation
The tradition of classifying cases of speciation into discrete geographic categories (allopatric, parapatric and sympatric) fuelled decades of fruitful research and debate. Not surprisingly, as the science has become more sophisticated, this simplistic taxonomy has become increasingly obsolete. Geographic patterns are now reasonably well understood. Sister species are rarely sympatric, implying that sympatric speciation, it its most general sense, is rare. However, sympatric speciation, even in its most restricted population genetic sense, is possible. Several case studies have demonstrated that divergence has occurred in nature without geographic barriers to gene flow. Obviously, different sets of criteria for sympatric speciation will lead to different numbers of qualifying cases. But changing the rules of nomenclature to make 'sympatric speciation' more or less common does not constitute scientific progress. Advances in the study of speciation have come from studies of the processes that constrain or promote divergence, and how they are affected by geography.
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