Browsing Rangeland Ecology & Management / Journal of Range Management by Authors
Comment: Ungulate herbivory of willows on Yellowstone's northern winter range: Response to Singer et al. (1994)Wagner, F. H.; Keigley, R. B.; Wambolt, C. L. (Society for Range Management, 1995-09-01)In a recent JRM article, Singer et al. (1994) report results of a willow (Salix spp.) study on the northern (ungulate winter) range of Yellowstone National Park (YNP) and immediate vicinity. The authors measured production, forage quality, moisture stress, and tannin content of growth shoots, all in relation to ungulate browsing, browsing-induced architectural variation, and altitude. In our view, the evidence presented does not support a number of the major inferences drawn, and in fact points to what in our judgement are more probable ones.
The Predator-Control Scene as of 1974Wagner, F. H. (Society for Range Management, 1975-01-01)Mounting public pressures against predator control, especially with toxicants, plus the information compiled by the Cain Committee led to the Executive Order banning the use of toxicants on federal land and by federal control agents. Reaction of the livestock industry has been to ask that control be moved into the state governments and to seek release of M-44 cyanide guns through an experiment clause in the Environmental Protection Agency order withdrawing toxicant registration. An accelerated research program under the aegis of a number of agencies is providing a great deal of information, but needed programs are falling between the cracks because of the lack of integrated analysis and attack on the overall predator problem. A multidisciplinary, federal predator commission is proposed which would have responsibility for analyzing the problem in concert, providing critical advice on proposed programs and available information, communicating with all interested parties, and advocating policy.
Use of a Crested Wheatgrass Seeding by Black-tailed JackrabbitsWestoby, M.; Wagner, F. H. (Society for Range Management, 1973-09-01)Black-tailed jackrabbit grazing pressure on a seeding of crested wheatgrass surrounded by native shrub vegetation has been estimated by the use of pellet counts. Grazing pressure falls off rapidly away from the edge of the field, 70% of the total being concentrated in a 300-m band around the edge of the field. By calibrating the pellet counts against others taken in an area of known jackrabbit density, and by using values available in the literature for forage consumption of jackrabbits, an estimate has been made of the absolute grazing pressure on the field in the 300-m band which is predominantly used. The forage removed by jackrabbits in this zone is estimated to be in the order of 60 kg/ha/yr. This is less than 10% of nearly all the yield values found, including those in poor years, in comparable seedings in this area. Apparently jackrabbits do not cause serious damage to established seedings of wheatgrass even when jackrabbit densities are high, as they were at the time of this study.