Often we forget the impact our political gestures have on wildlife. There have been many examples throughout history. One such example is the rabbit populations that lived predator free within the Berlin Wall. By living between the two sides of the Berlin wall, the rabbit population was protected from outside predators and populations grew exponentially. After the wall was taken down the rabbits had to relearn how to live without being “shielded” by German policy.
Walls and fences can disrupt migratory patterns, access to food resources, breeding diversity, and proper population control. The building of the Great Wall of China has lead to significant genetic differentiation among flora on either side of the wall. In India, a wall meant to protect Indians in the Kashmir Terror from Pakistani Guerillas interrupted migratory patterns of bears and leopards causing them to wander into villages and attack humans.
The rest of the article deals with the potential wildlife impacts of a U.S./Mexico border fence.