skip navigation
Your search for keyword(s) "canada" resulted in 7 record(s).
Back to Home Page
- Title: Distribution, abundance, and status of the greater sage grouse Centrocercus urophasianus, in Canada
- Journal: Canadian Field Naturalist
- Authors: C. L. Aldridge, and R. M. Brigham
- Date: 2003
- Summary: Aldridge and Brigham looked at the change in sage grouse population numbers in central Canada over the past 50-60 years. They mentioned a number of limiting factors that are having an affect on reducing bird numbers mainly through habitat alteration, and looked at agriculture practices and overgrazing as the two main problems. Grazing reduces the vegetation cover, which can expose the birds to predators or to severe weather as well as decreasing forage for the birds themselves. The authors urged for cooperative management within the area to try and keep in tact the little sage grouse habita ...
- Agrovoc Control Words: Grazing, Rangelands, Wildlife
- View more details about this article
- Title: Where the buffalo roamed-Or did they?
- Journal: Great Plains Research
- Authors: R. H. Hart
- Date: 2001
- Summary: Hart reviews and maps travelers' observations of bison during journeys across the U.S. and Canadian Great Plains in the 1700's to 1870's to examine whether bison "flash grazed", that is, grazed heavily for a short time, moved on, and did not return for months or even years. For example, Lewis and Clark observed bison near their camp at the Great Falls of the Missouri on 19 of 29 days, and traveler Charles Goodnight observed a herd in a dry year in the Texas Panhandle remain in place until thousands died of starvation, despite the availability of forage in an area 30 miles away. Fur ...
- Agrovoc Control Words: Riparian zones, Rangelands, Wildlife
- View more details about this article
- Title: Effects of migratory geese on plant communities of an Alaskan salt marsh
- Journal: Journal of Ecology
- Authors: A. Zacheis, J. W. Hupp, and R. W. Ruess
- Date: 2001
- Summary: The effects of annual browsing by migrating snow (Anser caerulescens caerulescens) and Canadia geese (Branta canadensis) on two salt marsh vegetation communities (herb and sedge meadow ) in Upper Cook Inlet, Alaska (61° 15' N, 150° 30' W) were investigated. Paired plots (grazed and ungrazed) were installed to examine the effects of herbivory on plant species composition and litter accumulation on two salt marsh communities. Standing crop was clipped in August; species composition and fecal counts were also recorded. Additional pa ...
- Agrovoc Control Words: Marshes, Herbivory, Wildlife
- View more details about this article
- Title: An embarrassment of riches: Too many geese
- Journal: Journal of Wildlife Management
- Authors: C. D. Ankney
- Date: 1996
- Summary: This invited paper presents the theory that populations of several goose species in North America have grown to levels where they have become an economic and ecological problem. This is based on studies from Ontario, Quebec, Alaska, Louisiana, Texas, Arkansas, Iowa, Kansas, Nebraska, Oklahoma, and Missouri. ...
- Agrovoc Control Words: Riparian zones, Rangelands, Geese
- View more details about this article
- Title: Plant competition and herbivory in relation to vegetation biomass
- Journal: Ecology
- Authors: S. P. Bonser, and R. J. Reader
- Date: 1995
- Summary: To determine the effects of competition and herbivory on plant growth in plant communities with low, medium or high levels of biomass, target plants were transplanted to plots with and without neighboring plants and grazing pressure. Neighbor removal, grazing exclusion and the combination of these two treatments enhanced the biomass of target plants, indicating that both competition and herbivory limit plant growth in this community. The effects of all treatments increased as plant community biomass increased, indicating that the effects of competition and herbivory are greater in more produ ...
- Agrovoc Control Words: Riparian zones, Rangelands, Wildlife
- View more details about this article
- Title: Herbivory by Canada geese: Diet selection and effect on lawns
- Journal: Ecological Applications
- Authors: M. R. Conover
- Date: 1991
- Summary: Conover examines whether Canada Geese (Branta canadensis) grazing changed the species composition of grass species at 20 sites in Connecticut, where geese are considered a nuisance. Mean goose density was 34 birds/ha of lawn (mean size of sites was 0.8 ha and located near a body of water). The percentage of these lawns in grass, other vegetation, or bare ground did not differ between the heavy-use and light-use areas. Kentucky bluegrass (Poa pratensis) was less prevalent and colonial bentgrass (Agrostis tenuis) more prevalent in heavy-use areas than in light-use areas of the same lawn. At ...
- Agrovoc Control Words: Riparian zones, Rangelands, Wildlife
- View more details about this article
- Title: The influence of deer browsing on the reproductive biology of Canada yew (Taxus canadensis marsh.): I. Direct effect on pollen, ovule, and seed production
- Journal: Oecologia
- Authors: T. D. Allison
- Date: 1990
- Summary: This study described the effects of white-tailed deer (Odocoileus virginianus) browsing on the reproductive efforts of Canada yew (Taxus canadensis marsh.), on four islands off the shores of Wisconsin. Browsed populations showed a decrease in the production of ovules, seeds and male strobili, compared to the unbrowsed plots. In the exclosure experiments, there was no significant difference in strobilus production between fenced and unfenced yews at Cedar Creek, when averaged over the five years of the experiment (P=0.51 for male strobili; P=0.24 for female strobili). Seed production at Bass ...
- Agrovoc Control Words: Riparian zones, Rangelands, Wildlife
- View more details about this article
Back to Homepage