Your search for keyword(s) "ungulate herbivory" resulted in 5 record(s).

Title: Do ungulates accelerate or decelerate nitrogen cycling?: Journal: Forest Ecology and Management; Authors: F. J. Singer, and F. A. Schoenecker; Date: 2003; Summary: Singer et al. present in this paper an evaluation of the abundance of elk (Cervus elaphus) and bison (Bison bison) and their grazing on ungulate winter ranges in two national parks (Yellowstone National Park and Rocky Mountain National Park), by documenting grazer effects on the size of N pools, plant production biomass, N yields in plants, soil fertility, and sustainability of an ecosystem. Grazer effects on the grasslands of Yellowstone National Park (YNP) classically fit all the criteria of the accelerating nutrient scenario. In response to grazin ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Populus forest characterization in Elk Island National Park relative to herbivory, prescribed fire, and topography: Journal: Canadian Journal of Botany; Authors: E. W. Bork, R. J. Hudson, and A. W. Bailey; Date: 1997; Summary: The objective of this study was to quantify various overstory and understory plant community characteristics in the Populus forests on Elk Island National Park, Alberta, under different disturbance regimes. Vegetation from 36 sites, stratified by four topographic positions and three historical treatment combinations, of fire and native ungulate herbivory, were sampled. Results showed that the structure and production of vegetation within Elk Island National Park have been altered by intensive ungulate grazing and prescribed burning, although the effect of both disturbances is strongly influe ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Upland plant community classification in Elk Island National Park, Alberta, Canada, using disturbance history and physical site factors: Journal: Plant ecology; Authors: E. W. Bork, R. J. Hudson, and A. W. Bailey; Date: 1997; Summary: The objective of this study was to classify upland sites sampled from an area in and around Elk Island National Park, Alberta, Canada, into community types, and interpret the effects of fire and wild ungulate herbivory. The results using TWINSPAN support the hypothesis that topography, herbivory, and fire have combined to produce six community types. Despite a high degree of species overlap among sites, specific indicator species varied enough to differentiate among the six community types. Based on a forward regression, topography, ungulate use, and prescribed burning related closely to th ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Ungulate herbivory of willows on Yellowstone's northern winter range: Journal: Journal of Range Management; Authors: F. J. Singer, L. C. Mark, and R. C. Cates; Date: 1994; Summary: Singer et al. looked at the major factors that have caused willow (Salix spp.) suppression in the northern Yellowstone range over the past few decades. The most proximate factor found in the study was herbivory by large ungulates, such elk (Cervus elaphus) and moose (Alces alces). Elk and moose used mainly willows that have been suppressed in the past, and did not use tall or intermediate sized willows within the study site. Singer et al. propose willow numbers are being suppressed due to fire suppression and water stress. Fire ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Graminoid responses to grazing by large herbivores: Adaptations, exaptations and interacting processes: Journal: Annals of the Missouri Botanical Garden; Authors: M. B. Coughenour; Date: 1985; Summary: Coughenour examines the problem of ascribing adaptive significance to traits that enable graminoids to tolerate or evade ungulate herbivory. Some of these traits may have originally evolved in response to non-grazing selection pressures, thus constituting grazing exaptations rather than true adaptations. The fossil record indicates that semiarid habitats, extensive grasslands, and grazers appeared, interacted, and evolved together. Traits, such as developmental plasticity, enhance competitive ability in certain environments, but also increase grazing tolerance or resistance. Experiments an ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article