Re: Speciation discussion, expectations and reality
I don't know how science can build their models of speciation since humans have directly or indirectly affected the course of natural evolution. Humans have directly changed the entire globe's landscaping to fit their needs and all species had to evolve with it.
There is no doubt that human influence caused all of the large mammals that once existed to become extinct or mutate to look like modern species of today.
We have moved so many species from their natural environment to other parts of the world that would definitely create a chain reaction for speciation to occur in that environment.
What I am saying is to compare what we observe now in nature due to human influence can't give you an accurate interpretation compared to life before us.
DNA that is currently the model we are using to trace today's living organisms back to their ancestors is going to be difficult and very confusing and it is not going to make sense since human influence has changed the normal flow of gene mutation and natural selection is now not natural in many species that we share this planet of today.
Organisms indirectly create the circumstances for other organisms to evolve or die. The big difference between humans and all other organisms is that we know we are directly responsible for many extinctions and because we know this, we already have a list of species that will not be here anymore after 2050.
Just this fact alone, we have to consider if humans have the ability to affect and alter nature, then some other mechanism also had the ability to alter global landscaping and all of the organisms that supported it in the past.