yeah, but I don't think particularly likely to cause new species radiation. I've seen trees and grass poking through concrete as long as I've been alive, it's just an obstacle.
I'm doubtful. Also, it is not massive all in the same place. Pollen from trees on both sides of the road will be able to reach each other, so speciation is unlikely as there will not be an interruption in gene flow.
yeah, but I don't think particularly likely to cause new species radiation. I've seen trees and grass poking through concrete as long as I've been alive, it's just an obstacle.
any significantly massive novel substrate will absolutely lead to speciation
I'm doubtful. Also, it is not massive all in the same place. Pollen from trees on both sides of the road will be able to reach each other, so speciation is unlikely as there will not be an interruption in gene flow.