Sympatric speciation: why the controversy?
Two recent studies provide convincing evidence that speciation without geographic isolation--sympatric speciation--has occurred within isolated island habitats, but we remain ignorant of how frequent the process really is.
Jiggins
Chris D
CD
Institute of Evolutionary Biology, School of Biology, University of Edinburgh, Edinburgh EH9 3JT, Scotland, UK. chris.jiggins@ed.ac.uk