| temporal variability in winter travel patterns of yellowstone bison: the effects of road grooming. | the influence of winter recreation on wildlife in yellowstone national park (ynp), wyoming and montana, usa, is a controversial issue. in particular, the effects of road grooming, done to facilitate snowmobile and snowcoach travel, on bison (bison bison) ecology are under debate. we collected data during winters, from 1997 to 2005, on bison road use, off-road travel, and activity budgets to quantify temporal trends in the amount of bison road and off-road travel and to identify the ecological fa ... | 2006 | 16937817 |