Analysis Of The Ecology Of Fear: Wolves Gone, Western Ecosystems Suffer
The near extinction of the Gray wolves in most of the west has created a cascade effect, affecting everything from elk, deer, beavers, fish, birds, etc. and has lead to the collapsing heath of some vegetation and Aspen. Biologist from the University of Oregon published an article in the BioScience and Forest Ecology and management journals and have helped outline the extremely complex relationships wolves have to our ecosystems. This also explains major problems facing many western streams, plants and wildlife. The scientists say, “It would appear that the loss of a keystone predator, the gray wolf, across vast areas of the American West may have set the stage for previously unrecognized and unappreciated ecological changes in riparian and upland plant communities, and the functions they provide.” In their research, they have studied the idea that has been coined, “the ecology of fear.’ Historical significance on the ecosystem is only to preying on other animals, large and small. The scientists have found that it has something to due with the fear larger animals, such as grazing animals, have of wolves and the behavior that comes from that. These grazing animals and some smaller animals change their behavior when they’re under threat of being preyed on by wolves, “They forage or browse less intensively at high-risk sites.” Healthy ecosystems, the researchers say, are places like stream sides filled with lots of vegetation and when healthy will grow large trees supporting beaver and other wildlife. OSU scientists stated that the loss of wolves dated almost exactly to the time with loss of Aspen and cottonwood trees in Yellowstone. This was only reversed with the reintroduction of wolves, when they preyed on the elk that were eating all of the baby trees. They have found the exact same thing with the reintroduction of wolves in Montana. It may not seem like much, the slow recovery of Aspen, but it sets the stage for “an increase in plant biomass, improved streambank stability, better floodplain functioning, reduced soil erosion, and better food web support for everything from beaver to river otter, fish, birds, amphibians, and insects. Biodiversity will increase and rising beaver populations will lead to even more changes, including sediment retention, wetland maintenance and nutrient cycling.” But the researchers say that fear of human sport hunters play a role. Research has shown that elk move away from road sides when heavily preyed on by hunters and Aspen are heavily eaten where hunting isn’t a real threat. Researchers say that the predation by large predators is pivotal in maintaining biodiversity in some ecosystems. More information can be found at this website, http://www.cof.orst.edu/wolves. While large carnivore population continue to collapse in the lower 48, the numbers are starting to increase a little in recent years and growing evidence suggests they are pivotal to ecosystems. “A similar point, they said, was made by the great naturalist Aldo Leopold in 1949, who predicted this crisis. “I have lived to see state after state extirpate its wolves,” Leopold wrote 55 years ago. “I have seen every edible bush and seedling browsed, first to anemic desuetude, and then to death.”
This was very important to my topic in that it gives a name to the issues that have occurred in the last few decades and has been documented scientists who have written articles and journals. It’s been documented in place after place that the extermination of wolves causes a great effect on the wildlife and vegetation in an ecosystem. “The Biology of Fear” is a great example of what could happen if wolves were to be exterminated, and this has happened in more than a few places including here in Idaho. The fear of larger predators, the fear of hunters– it’s all interconnected in a complicated way that not a lot of people understand or care to understand but the fact is, wolves play a pivotal role in our ecosystems, a role that shouldn’t be ignored or altered out of ignorance or greed. This gives me facts that are credible and interesting.