Saturday, 3 March 2018
Evolution Into Reverse?
An American study has thrown up an interesting possibility of 'speciation reversal' in which the, well-documented speciation process (driven by geographical isolation) has apparently resulted in two separate lines recombining (https://www.theguardian.com/science/2018/mar/02/two-become-one-two-raven-lineages-merge-in-speciation-reversal). The California and Holarctic ravens were found in different parts of North America (and thought to have separated some 2 million years ago) but wide-spread hybridisation seems to be recombining them into a single species. Although there are not many reports of such a process, it seems eminently possible if geographical isolation is removed. Of course, the possibility exists that the two populations never really merited being classified as separate species.
Columbine ( Aquilegia vulgaris ) blooms in Loughor.
A combination of night rain and day-time sun has resulted in more Bynea blooms. The Southern marsh orchid ( Dactylorhiza praetermissa...
A report has detailed how climate change is altering life in the warming seas around UK shores ( https://www.theguardian.com/environment...
More items from the moth trap in Loughor. A Hebrew character ( Orthosia gothica ); a Small angl...