jonathan180iq
Well-Known Member
Let's dive into the differences between artificial selection and natural selection later, if you don't mind.A subspecies is not a new species any more than the offspring of a poodle and a bull dog is a new species.
In short - there is a big difference.
Read this carefully, please...I did not call them a subspecies. l That ws the classification of those who did the study. The enviroment cannot change a species. It might make the species infertile or cause it to become extinct, but it is not a mechanism that will change the species.
How can you make the above statement after you cited a study that objectively demonstrates how environments change species...? Were it not for the geographic differences and environmental factors weighing on the expanding populations and causing them to change both in genotype and phenotype, then what was it?
I certainly called that response, didn't I? You are right - they are still salamanders... But they are salamanders that have markedly changed due to natural causes. They've changed so much, both physically and socially that the two reconnected populations now can no longer mate with one another. The natural development of a new subspecies is part of speciation. I'm sorry that this fact doesn't mesh well with your arguments. But that does not make it any less true.Not true. That were born salamanders and at the end of the end of the study they were still salmanders.
Starting at the bottom left, and then going clockwise around Central Valley, you'll see drastic color changes among these varying salamanders. Which factor, or force, caused those adaptations to change? You're saying that it wasn't environment - And if you want to stick with that - that's fine. I do expect you, however, to tell me what it was that caused those changes. (Remember, the original population looked like the eschscholtzii)
Also, you've not addressed the crucial question of my last post, which asked what limiting biological factor keeps small changes over time, which you've admitted take place, from continuing indefinitely, eventually creating large changes over longer periods of time. What biological mechanism limits those changes?