Talk:Sympatric speciation
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[edit] Strawberry Evolution
According to Garden Strawberry, the modern garden strawberry is a cultivated octaploid species that resulted from the deliberate cross of two wild octaploid species, Fragaria virginiana and Fragaria chiloensis. The Wiki references do not indicate that the three cannot interbreed with each other. The garden strawberry, therefore, does not appear to be an example of a new species which arose by sypatric speciation. I confess, however, that I am no expert in this area. If someone can provide an external verifiable reference to show the Wiki articles are wrong, I will gladly conceed to their superior expertise. --Nowa 21:31, 4 December 2005 (UTC)
- Actually, what I noticed about this article is that it never really gives a clear mention of what sympatric speciation is. But I don't think a hybrid cross becoming a new species counts as sympatric speciation. --M1ss1ontomars2k4 21:51, 6 May 2006 (UTC)
- That is a case of Hybrid speciation. And since it happens with human intervention, the sympatric speciation definition, applicable to natural populations, does not apply. GoEThe (talk) 10:33, 2 March 2008 (UTC)
[edit] Actual description
While the information in the article is interesting, very interesting, there is no description of what Sympatric speciation is. Readers who come across the page after following a link, for instance, probably want to know this. Rintrah 12:55, 10 November 2006 (UTC)
- Yeah, I've read this article multiple times and have no understanding of what sympatric speciation is. —The preceding unsigned comment was added by 69.231.151.178 (talk) 03:39, 29 March 2007 (UTC).
[edit] Sympatric
This redirect should be deleted as the term simply means 'living together'. Speciation is just one noun which the adjective can be placed before. Richard001 (talk) 06:23, 12 April 2008 (UTC)
[edit] examples
The example of the Tennessee cave salamanders is an excellent one of parapatric speciation, or divergence with gene flow, but as the cave and surface salamanders occupy different habitats, it is certainly not sympatric speciation. I will propose to move this very nice example to a more fitting section. — Preceding unsigned comment added by Ockendeni (talk • contribs) 09:47, 9 December 2010 (UTC)
[edit] examples
The example of the Tennessee cave salamanders is an excellent one of parapatric speciation, or divergence with gene flow, but as the cave and surface salamanders occupy different habitats, it is certainly not sympatric speciation. In fact, the authors recognize this as "sympatric speciation" is not in the title, abstract nor keywords. I will propose to move this very nice example to a more fitting section. — Preceding unsigned comment added by Ockendeni (talk • contribs) 09:50, 9 December 2010 (UTC)
[edit] Factor preventing interbreeding?
There seems to be 2 main models explaining the sympatric speciation in a sexual species, which end up beeing similar: advantage of homozygotes, or advantage of extreme forms for a quantitative trait (eg big or small size, not medium), both tending to lead to heteromorphism. But this alone does not allow sympatric speciation: in absence of another, simultaneously appearing, factor preventing interbreeding, slightly differing subpopulation would constantly tend to homogenise back, or at the minimum not split into 2 clear subspecies, wouldn't they? (Just as they have always done in the past, remaining a single species.)
Thus, I guess sympatric speciation requires both heteromorphic and interbreeding barrier factors, so-to-say in the same space-time; which at first sight seems unprobable. (Both can and do well appear independently.) What do you think?
In addition, supposed documented cases of sympatric speciation as listed in the article do not present facts allowing to conclude speciation appeared in sympatry. Instead, they only show cases of child species presently living in the same area. The obvious explanation that populations did live separated (allopatry, parapatry, peripatry) in past times looks simpler and far more probable to me. (Imagine Cristoforo Colombo be born in 1M years ;-) Again, what do you think? --denis "spir" (talk) 08:54, 6 October 2011 (UTC)
