Bears and humans have been in conflict in Texas since, well, pretty much as long as we’ve kept track. By the time the U.S. Department of Agriculture conducted the first organized survey of Texas mammals in the 1890s, black bears were in decline after having been persecuted for more than half a century. They were trapped, poisoned, hunted, and pushed out of their habitat by development and agriculture. By the mid-20th century, they were nearly extirpated throughout West Texas. [...]
By militarizing the border—building walls and fences, Border Patrol outposts, spotlights and service roads and clearing vegetation—we sever the connections that wildlife relies on. We cut animals off from habitats, resources, and breeding partners and block migration routes, just as climate change and habitat loss makes every bit of land ever more important. We know how bad this kind of fragmentation is ecologically—scientists have seen the consequences of constructed barriers on farms, ranches, and national parks, as well as across international borders in Europe and Central Asia. They also know that once the barriers are built, it becomes even harder for conservationists to work to protect animals just when they need it the most. [...]
In order to get a better sense of the problem, we can look to Europe, where there are roughly 18,000 miles of border fences and walls, many hundreds of which have gone up just since the start of the refugee crisis last year. In Slovenia, for example, new security fences erected late last year cut through range of one of Europe’s largest populations of gray wolves, isolating packs on either side of the Slovenia-Croatia border. The same fence goes through the habitat of a small, threatened population of Eurasian lynx, and a recent study led by ecologist John Linnell argues it may be “last push for the population to spiral down the extinction vortex.”
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