I'm not very surprised at the finding, but what if they are only interacting due to shrinking natural habitats, rather than by choice? i.e. wildlife did not hav

I'm not very surprised at the finding, but what if they are only interacting due to shrinking natural habitats, rather than by choice? i.e. wildlife did not have to co-exist as much before they were restricted to National Parks? I think everyone realizes the significant of resources like food and water, but what about just "space" itself as a resource?