Although, historically, actinyl VI) and (V) ions have been the subject of the most in depth research, the study of actinide ions in the +IV oxidation state (principally for U, Np and Pu) is inherently important in governing speciation in all aspects of the nuclear fuel cycle.
The intricate physical and neural mechanisms by which the songs are perceived, produced and learned are an important substrate for sexual and natural selection, and song is therefore an important aspect driving speciation in birds [ 6, 7].
To assess the representativeness of a CRM for analytical mercury speciation, a number of aspects must be considered in regard to the routine samples analyzed: the origin of the matrix, the type of mercury species and the level of concentration.
Our review aims to examine both extrinsic and intrinsic aspects of speciation.
Below, I focus on the geographic aspects of speciation, which is correctly viewed as an extended process through time, rather than an instantaneous event.
This study demonstrated three important aspects of speciation in a developmentally complex eukaryotic microbe.
Axel Meyer is an evolutionary geneticist interested in the ecological, developmental and genomic aspects of speciation and organismal diversification.
Numerous studies on different aspects of speciation and the evolution of adaptive traits are based on East African cichlids, e.g. [ 3- 6].
Among animals, moths and butterflies (insect order Lepidoptera) represent an ideal model group for the study of various aspects of speciation.
Still less is known about the relationship between genetic divergence, reproductive isolation and ecological divergence, and the relative importance of all these aspects for speciation.
