Those two problems are out of context to eachother. That is, they are not the same.



RES have shown the ability to replace or impact native turtles, all over the world.



That is, they can outcompeted other turtle species using the same habitat, normally a very general habitat.



Turtle species that are highly adapted, like for bogs, or fast moving water, are not effected.



About habitat change. It was the habitat that selected for(phenotypic pressures) yellow bellied sliders. Once is changed, then its no longer specific for yellow bellied sliders.



Lastly, in nature its not adaption and habitat pressures that determine what exsists.



In captivity, you the keeper are selecting what exsists. You pick what genes are expressed. So if one hybrid event occurs, and is followed nothing but normal events, those genes will be watered down, like a drop of oil in a lake. In nature thats what occurs, Hybrids occur regularly, but are so so outnumbered, they normally disappear.



Unless the phenotypic pressures change(habitat change) and it favors an envasive species or a hybrid, which both do occur.



In your case, you are seeking conformation with your examples, like its A or B. When in reality, there are many many many different directions that can occur. You must pick and use the right ones. Not just any one.(comparisons)

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