The disappearance of the wolves had many unexpected results. Deer and elk populations — major food sources (来源) for the wolf – grew rapidly. These animals consumed large amounts of vegetation (植被), which reduced plant diversity in the park. In the absence of wolves, coyote populations a...
US Fish and Wildlife Service, Northern Rocky Mountain Wolf Recovery Coordinator, 585 Shepard Way, Helena, MT 59601, USAJohn Wiley & Sons, LtdSmith, D.W., Bangs, E.E., 2009. Reintroduction of wolves to Yellowstone National Park: History, values and ecosystem restoration. In: Hayward, M.W...
Many people believe that the wolf reintroduction didn’t do anything to restore the Yellowstone ecosystem; others believe that the wolf was the sole factor causing the recovery. The truth, as with most things, probably lies somewhere in the middle: wolves were responsible forsome,but not all, ...
. Yellowstone’s wolf reintroduction program was a mistake. . The government should be responsible for reintroducing wolves. . Yellowstone’s wolf program has benefited the wolves and the park. 相关知识点: 试题来源: 解析 1. C 2. B 3. D 4. D 【导语】本文是一篇说明文。文章介绍了美国...
Opponents of the wolf reintroduction claim that wolves chase and weaken elk and other prey animals in the park by running them, and kill just for the fun of it. The video here shows what really happens and that wolves are unsuccessful more than they are successful, and generally go days or...
The gray wolf was listed as endangered under the Endangered Species Act in 1973. Reintroduction efforts placed 66 wolves in Yellowstone National Park and part of Idaho in 1995-96. As many as 1,500 wolves now live in Idaho, Montana and Wyoming. “The federal government is giving the states ...
After years of heated debate, gray wolves were rein-troduced to Yellowstone National Park. Fourteen wolveswere caught in Canada and transported to the park. By lastyear,the Yellowstone wolf population had grown to morethan 170 wolves.Gray wolves once were seen here and there in theYellowstone ...
The reintroduction of wolves to Yellowstone Park. 2【题目】例1(全国卷Ⅲ)After years of heated debate, gray wolves were reintroduced toYellowstone National Park. Fourteen wolves were caught in Canada and transportedto the park. By last year, the Yellowstone wolf population had grown to more than...
When the grey wolf wasreintroduced into the Greater Yellowstone Ecosystem in 1995, there was only one beaver colony in the park, said Doug Smith, a wildlife biologist in charge of the Yellowstone Wolf Project. Today, the park is home to nine beaver colonies, with the promise of more to co...
After years of heated debate,gray wolves were reintroduced toYellowstone National Park.Fourteen wolves were caught inCanada and transported to thepark. By last year, theYellowstone wolf population hadgrown to more than 170 wolves.Gray wolves once were seenhere and there in the Yellowstonearea and...