Speciation like this also requires some kind of ecological differentiation between the diverging species.
Sedum tarokoense H.W. Lin & J.C. Wang is described as a new species and illustrated based on the morphological, seed micromorphology and ecological differentiation.
Ecological differentiation in populations may force diversification and speciation (Schluter 1996) and it has to be determined whether phenotypic variation correlates to genetic and reproductive isolation.
Molecular marker-based analysis has also been used to characterize the population structure of O. rufipogon and relate it to geographic and ecological differentiation (Liu et al. 2007; Londo et al. 2006; Vaughan et al. 2008; Wang et al. 2008).
Secondly, future research is also required to link PD to ecological differentiation.
Studies on the ecological differentiation of other Chironomus species have revealed a range of mechanisms that structure coexistence in sympatry.
These hybrids occur only within the parental habitats, and there is no observable ecological differentiation from the parents other than a shorter flowering period.
Divergent natural selection can cause ecological differentiation and speciation simultaneously when its action on ecological traits affects mate choice as a by-product [31].
Interestingly, these monophyly criteria fail to delimit many lineages previously described as species on the basis of clear and concordant patterns of mtDNA, morphological, and ecological differentiation [28], [37], [56].
Asplenium and Garovaglia DArT data were useful for making biological inferences, for example, phylogeographic structure in plants with a high dispersal capacity, naturally occurring hybridization, exploration of chimeric environmental samples, and the reconstruction of ecological differentiation.
Thus DArT is a demonstrably valuable addition to the set of existing molecular approaches used to infer biological phenomena such as adaptive radiations, population dynamics, hybridization, introgression, ecological differentiation and phylogeography.
