Monday, March 7, 2011
A recent CNN article described the plummeting population of big cats in Africa, noting that populations have dropped from 450,000 fifty years ago to as few as 20,000 today. Worldwide tiger populations have experienced similar drastic declines, with an estimated 95% drop in population over the past one hundred years - from 100,000 tigers at the turn of the 20th Century to as few as 3,200 today. Of course, scientists are similarly concerned about the implications of climate change for polar bear populations, not to mention numerous other bear populations around the world. These scenarios raise interesting questions about the significance of "charismatic megafauna" in either spurring environmental protection (cute and cuddly panda bears) or in exacerbating species decline due to the "prize value" of the animal (ivory elephant tusks, tiger meat in Asian markets).
Charismatic megafauna are often described as species that people "really care about," such as pandas, whales, and bald eagles, to name a few. So what does it say about the status of global biodiversity when we continue to witness precipitous declines in populations of charismatic megafauna? Perhaps the problem is jurisdictional: lions and tigers are distributed in developing countries with far less stringent environmental protections and where the animal's economic value is far higher when it is dead rather than alive. The case of mountain lions and wolves in the U.S. lends evidence in this regard, as each (the western mountain lion, at least) is recovering in population size and regaining portions of former habitat presumably due to the (relatively recent) focus on environmental protection throughout their habitat range. But as the polar bear and a variety of other species demonstrate, economic growth and habitat fragmentation also play a key role in the decline of these species. So, if lions, tigers, and bears are charismatic megafauna that people "really care about," what happens to global resources that people hold in far less regard?
- Blake Hudson