Your search for Journal Title Journal of Applied Ecology resulted in 12 record(s).

Title: Effects of spring grazing by greater snow geese on hay production: Journal: Journal of Applied Ecology; Authors: J. Bedard, A. Nadeau, and G. Gauthier; Date: 1986; Summary: Goose exclosures were used to determine the effects of spring grazing by migratory spring greater snow geese (Chen caerulescens atlantica) on June hay harvests in agricultural fields, along the St. Lawrence River near Montmagny, Quebec. A network of 51 sampling stations was established during the first week of April within the 213 ha productive area. At each station two sets of paired plots (ï¿½Aï¿½ and ï¿½Bï¿½) were established with one plot of each pairing grazed and one ungrazed. Vegetation sampling was conducted ...; Agrovoc Control Words: Riparian zones, Hay, Geese; View more details about this article

Title: Biomass and nitrogen responses to grazing of upland steppe on Yellowstone's northern winter range: Journal: Journal of Applied Ecology; Authors: M. B. Coughenour; Date: 1991; Summary: Coughenour examined dormant season elk (Cervus elaphus) impacts on shoot and root standing crop and nitrogen concentration in and outside of 35 year old exclosures in Yellowstone National Park's northern winter range. Grazing did not have any affect on root biomass in either of the two years measured, suggesting perennial grass fitness under conditions of use and rest. Grazing increased shoot nitrogen concentrations in grasses and in sagebrush (Artemisia frigida), which should improve elk nutrition as long as shoot production is not heavily reduced. The net effects of winter grazing appeare ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Management practices in tallgrass prairie: Large- and small-scale experimental effects on species composition: Journal: Journal of Applied Ecology; Authors: D. J. Gibson, T. R. Seastedt, and J. M. Briggs; Date: 1993; Summary: Authors used a multiscale approach by studying the effects of soil type/fertilizer, burning, or mowing on species composition within both large- (10,000 m²) and small-scale (100 m²) experimental plots in the tallgrass prairie of Kansas. On the large-scale plots soil type was shown to be the important discriminator of plant communities with a separation of soil subgroups (Pachic Argiustolls and Udic Argiustolls) at the first classification level. As management treatments, burning and mowing differed in their effect on species richness, especially ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: The effects of grazing by greater snow geese on the vegetation of tidal marshes in the St Lawrence estuary: Journal: Journal of Applied Ecology; Authors: J. F. Giroux, and J. Bedard; Date: 1987; Summary: Distribution and grazing effects of greater snow geese (Chen caerulescens atlantica) on productivity of salt marsh species was studied at Montmagny (47Â° 00' N, 70Â° 35' W) and Cap St. Ignace (47Â° 02' N, 70Â° 28' W), Quebec. Three experiments were conducted to compare net above ground primary production (NAPP) and net below ground primary production (NBPP) between grazed and ungrazed sites, changes in NAPP of all plant species and geese use of sanctuaries and adjacent areas during spring and fall staging. Plants were clipped and s ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Small-scale heterogeneity in a semi-arid North American grassland. I. Tillering, N uptake and retranslocation in simulated urine patches: Journal: Journal of Applied Ecology; Authors: V. J. Jaramillo, and J. K. Detling; Date: 1992; Summary: Authors studied the response of two grass species differing in growth forms and photosynthetic pathway to simulated cattle urine deposition in a native semi-arid grassland of Wyoming. The species were Agropyron smithii, a spreading, rhizomatous C₃ grass, and Bouteloua gracilis, a cespitose C₄ grass. They are codominants in this grassland and A. smithii is the most important forage species in the study site. Simulated urine increased tiller density of both species, with B. g ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Resource partitioning and competition among cervids in the northern Rocky Mountains

Journal: Journal of Applied Ecology

Authors: K. J. Jenkins, and R. G. Wright

Date: 1988

Summary: Resource partitioning patterns for elk, moose and white-tailed deer in Glacier National Park, Montana, were documented during a mild and a harsh winter. Also, the effects of winter on interspecific competition and its role on niche relationships were investigated. Spatial distribution and habitat selection were observed from January to May for two years. Vegetation characteristics were collected in the summers previous to each winter. Snow depths to quantify severity of winter and fecal samples to determine forage preferences were collected. ...

Agrovoc Control Words: Ungulates, Rangelands, Competition

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Title: Destruction of wetland habitats by lesser snow geese: A keystone species on the west coast of Hudson Bay

Journal: Journal of Applied Ecology

Authors: R. H. Kerbes, P. M. Kotanen, and R. L. Jefferies

Date: 1990

Summary: To estimate lesser snow geese populations and determine the effects of geese herbivory along the Hudson Bay in the Northwest Territories, nesting and population surveys were conducted along with plant species frequency and fecal counts. Aerial photographs were taken in June 1985 to count nesting birds, while population surveys were done from an airplane in 1977, 1980, 1981, and 1985. The geese population survey in 1978 was done with aerial photographs. Plant frequency and nest and fecal counts were conducted on seven non-degraded sites and five degraded sites in 1985. ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Spread of introduced Lehmann lovegrass along a grazing intensity gradient

Journal: Journal of Applied Ecology

Authors: M. P. McClaren, and M. E. Anable

Date: 1992

Summary: McClaren and Anable measured the changes in density of Lehmann lovegrass (Eragrostis lehmanniana) and native grasses, and the proportion of lovegrass present along a livestock grazing intensity gradient, six occasions in permanent plots during 1972-1990 on the Santa Rita Experimental Range, Arizona. The gradient included grazing exclosures and plots radiating away from a cattle watering point. The density of Lehman lovegrass increased with time but was not affected by different grazing intensities. As grazing intensity increased, native grass density decreased and loveg ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Soluble carbohydrates, concurrent photosynthesis and efficiency in regrowth following defoliation: A field study with Agropyron species

Journal: Journal of Applied Ecology

Authors: J. H. Richards, and M. M. Caldwell

Date: 1985

Summary: Richards and Caldwell compare etiolated growth, carbohydrate pools and regrowth efficiency of Agropyron desertorum and Agropyron spicatum. A. desertorum consistently produced more regrowth in the absence of photosynthesis than A. spicatum, but a severe preclipping treatment did not significantly reduce etiolated regrowth in either species. Differences in regrowth between and within species were not correlated with crown non-structural carbohydrate concentrations, total pools, or amounts of utilized during regro ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Effects of herbivory on twig dynamics of a Sonoran desert shrub Simmondsia chinensis (Link) Schn

Journal: Journal of Applied Ecology

Authors: B. A. Roundy, and G. B. Ruyle

Date: 1989

Summary: The authors of this study compared the vegetative and reproductive growth of moderately and heavily grazed jojoba (Simmondsia chinensis) plants to jojoba plants that had been rested from grazing for 7 years inside livestock exclosures. The density of jojoba plants was similar inside and outside of exclosures, however, grazed plants were shorter, had less canopy cover, and produced less flowers than ungrazed plants. Moderate grazing enhanced twig growth and heavy grazing decreased twig growth, however, plants exposed to both grazing levels were able to compensate for vege ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Survival of perennial grass seedlings under intensive management in semi-arid rangelands

Journal: Journal of Applied Ecology

Authors: D. O. Salihi, and B. E. Norton

Date: 1987

Summary: In this study, short duration grazing practices significantly reduced the survival of crested wheatgrass (Agropyron desertorum) seedlings in Utah pastures. Seedlings survival was similar in grazed and ungrazed treatments prior to grazing events and seedling survival in grazed treatments declined after both three-day grazing events, however, the decline was more pronounced after the second grazing event later in the growing season. Survival of plants in grazed treatments was still lower ten months after the last grazing event, suggesting that livestock grazing has lasting ...

Agrovoc Control Words: Riparian zones, Rangelands, Wildlife

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Title: Predicting plant species' responses to grazing

Journal: Journal of Applied Ecology

Authors: P. A. Vesk, and M. Westoby

Date: 2001

Summary: The consistency of plant species response to livestock grazing for the purpose of predicting vegetation dynamics and identifying plant functional types and traits was examined. Research and conclusions were formed by analyzing the results from 35 published studies from across Australia that examined data on species composition changes from grazing using a data set of 1,554 grazing responses from 829 species. This study examined two basic questions 1) what shared responses do species exhibit from grazing disturbance and 2) what are the central ranges of among-species variation to grazing distur ...

Agrovoc Control Words: Australia, Rangelands, Grazing intensity

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