nPeace
Veteran Member
I thought you were here to teach me.Speciation has been observed. Is that what you mean by evolution above species level?
Here is speciation in a virus within one month in a flask.
https://phys.org/news/2016-11-biologists-speciation-laboratory-flask.html
Plant speciation has also been observed in less than a century.
Evolution: Watching Speciation Occur | Observations
For example, there were the two new species of American goatsbeards (or salsifies, genus Tragopogon) that sprung into existence in the past century. In the early 1900s, three species of these wildflowers - the western salsify (T. dubius), the meadow salsify (T. pratensis), and the oyster plant (T. porrifolius) - were introduced to the United States from Europe. As their populations expanded, the species interacted, often producing sterile hybrids. But by the 1950s, scientists realized that there were two new variations of goatsbeard growing. While they looked like hybrids, they weren't sterile. They were perfectly capable of reproducing with their own kind but not with any of the original three species - the classic definition of a new species.
How did this happen? It turns out that the parental plants made mistakes when they created their gametes (analogous to our sperm and eggs). Instead of making gametes with only one copy of each chromosome, they created ones with two or more, a state called polyploidy. Two polyploid gametes from different species, each with double the genetic information they were supposed to have, fused, and created a tetraploid: an creature with 4 sets of chromosomes. Because of the difference in chromosome number, the tetrapoid couldn't mate with either of its parent species, but it wasn't prevented from reproducing with fellow accidents.
In vertebrates as well, a new species of finch has been observed to emerge in Galapagos,
New species evolve in just two generations | Cosmos
A team of researchers led by Leif Andersson from Uppsala University, in Sweden, report the emergence of a new species of finch, dubbed Big Bird, arising from an initial cross breeding between two species, the large cactus finch (Geospiza conirostris) and the medium ground finch (Geospiz fortis). From a first chance encounter, a new lineage which boasts a unique beak shape, unique vocalisations, and the inability to breed with other finch species emerged.
The Big Bird today comprises only about 30 individuals – all fiercely inbred, but meeting the definition of distinct species, nonetheless.
The case study is watertight because the set-up for the foundation mating between the two originator species was observed by a pair of scientists from Princeton University, who were visiting the Galapagos island of Daphne Major at the time.
The Grants, having taken an initial blood sample from the outsider, continued to monitor the little population of Big Birds, taking blood from the subsequent six generations.
Now, Andersson and his colleagues from Uppsala have analysed the DNA collected from each of those generations. They conclude that the Big Birds quickly developed unique structural characteristics with which they were able to forge an entirely new environmental niche that did not put them in competition with the more numerous resident finch species.
“It is very striking that when we compare the size and shape of the Big Bird beaks with the beak morphologies of the other three species inhabiting Daphne Major, the Big Birds occupy their own niche in the beak morphology space,” says co-author Sangeet Lamichhaney.
“Thus, the combination of gene variants contributed from the two interbreeding species in combination with natural selection led to the evolution of a beak morphology that was competitive and unique.”
So speciation happens, and evolution within species (adaptation) has been known to happen for a very long time. And that, concisely, is all that constitutes the theory of evolution.
No, not at the species level, but above the species level.
We already went through speciation in the thread... somewhere.