tag:blogger.com,1999:blog-2495252248554858744.post8088098049227375419..comments2024-02-21T21:14:26.819-08:00Comments on Experimental Evolution, Ecology and Behaviour (EXEB): Last week’s paper “What, if anything, is sympatric speciation?” and a critical evaluation of the 4 criteria proposed by Coyne and Orr (2004)Anonymoushttp://www.blogger.com/profile/03175724495725111574noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-2495252248554858744.post-17026220421016059492009-03-23T00:37:00.000-07:002009-03-23T00:37:00.000-07:00Magne probably refers to the article by Kerstin Jo...Magne probably refers to the article by Kerstin Johannesson in the recent "Evolutionary Ecology" theme issue, that I edited together with some others. I think you read that article quite carefully Maren :)?Anonymoushttps://www.blogger.com/profile/03175724495725111574noreply@blogger.comtag:blogger.com,1999:blog-2495252248554858744.post-155099151618616862009-03-22T15:09:00.000-07:002009-03-22T15:09:00.000-07:00he problems described in this article reminds me a...he problems described in this article reminds me a lot about Kerstin Johannessons research at Gothenburg University. Working with marine snails, she and her group have shown parallell, ecological speciation going on on several islands in the GBG archipelago, and if I have understood it correctly they have shown that individuals of a certain ecotype on a certain island is more closely related to the population of the other ecotype on the same island than to there own ecotype on the island nearby. However, as the gene flow within ecotypes between islands is likely to soon be greater than that gene flow between different ecotypes on the same island, they predict that in the future this will look like a typically allopatric speciation with secondary contact zones between the two species on each island. Hence, what appears to be a case of "true", sympatric speciation will, in retrospect, look like a typical allopatric speciation.<BR/><BR/>Cool? I think so!<BR/><BR/>MAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2495252248554858744.post-61501086478509166992009-03-22T08:24:00.000-07:002009-03-22T08:24:00.000-07:00I have obviously not thought so much about this as...I have obviously not thought so much about this as Maren, but it seems to me that criterion 1 and 4 are problematic, perhaps even untestable. I certainly agree that current biogeographic distribution patterns might have no relationship at all to past ones (criterion 1). Two formerly sympatric species could now be allopatric, or vice versa. Criterion 1 thus seems logically questionable.<BR/><BR/>I have to think deeper about criterion 4, although superficially, it appears to suffer from the same problem as criterion 1. If so, it leads us to the uncomfortable conclusion that we cannot use neither current or past geography to infer geographic modes of speciation, which seems perhaps a bit unfortunate. Here perhaps Shawn could fill in with some thoughts?Anonymoushttps://www.blogger.com/profile/03175724495725111574noreply@blogger.com