Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 52 for “"trampling"”.
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The response of dune vegetation to human trampling and grazing
… the present recreational use.<br/><br/>Periodic trampling and wear by motor cycle was applied to previously undamaged vegetation and the effect monitored quantitatively over three seasons. Vegetation is shown by multivariate analysis to be related first to slope and aspect and then to the …
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Harvest Efficiency, Forage Trampling, and Litter Decomposition of Mob Grazing
… density had on harvest efficiency, forage trampling, and litter decomposition. One experimental site was established in eastern South Dakota. Two separate experiments were conducted. The first experiment examined the effect of stocking density on utilization, harvest efficiency, and forage …
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Soil and permafrost distribution, soil characterisation and soil vulnerability to human foot trampling, Wright Valley, Antarctica
Soils and shallow permafrost in Wright Valley, Antarctica were mapped at a scale of 1:50 000 to depict their spatial distribution, and sampled to determine the main drivers for the soil classification. In the cold desert of Wright Valley the Gelisol order of Soil Taxonomy was used to classify the …
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Using benthic microalgae as an indicator of recreational disturbance associated with bait collection and trampling in Langebaan Lagoon, South Africa
… including bait harvesting and associated trampling. Many studies have quantified the impact of these activities on the benthic environment, with few dedicated to understanding microalgal responses. However, this study utilized a rapid, optical tool (BenthoTorch) in Langebaan Lagoon, to …
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Assessing the effects of trampling and bait-collecting on population, morphological and reproductive metrics of a key ecosystem engineer in Langebaan Lagoon
… disturbances such as intense bait collection and trampling, that compromise ecosystem resilience and functionality. Research on how human disturbance impacts keystone species, such as the endobenthic sandprawn Kraussilichirus kraussi, an important ecosystem engineer, has proven to be valuable and …
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Impacts of degradation on critically endangered Oudtshoorn Gannaveld
… communities. It was found that grazing and trampling induced degradation on termitaria results in the loss of perennial plant cover and plant litter and an increase in bare ground while degradation off termitaria results in a loss of species. There are changes in soil chemistry both on and …
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The effect of winter grazing and a nitrification inhibitor on nitrous oxide emissions and denitrification in a stony soil
… understanding of the effects of severe animal trampling on the physical properties of, and denitrifying microbial population in, the soil below forage crops grazed by dairy cows during winter. Three field-based experiments were carried out in 2011, 2012 and 2013, and were complimented by a …
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Human impact on the biodiversity of macroinvertebrates in intertidal rocky shores along the Namibian coast
… anthropogenic disturbance such as harvesting and trampling due to human visitors may reduce biodiversity, modifying species genetic variability and overall ecosystem functioning. This research compares macroinvertebrate assemblage structures, size and diversity between disturbed and less disturbed …
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Impact of lifestock on vegetation and soil nutrients around water points in Highland Savanna rangelands, Namibia
… gradient possibly due to livestock impact of trampling and grazing on vegetation and soil nutrients. This negatively influences vegetation composition, structure, richness and diversity around water points. However, no significant difference (P 0.05) in the quantized impacts of grazing and …
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A comparative study of Corynephorus canescens (L.) P.Beauv. communities of inland sand dunes in England and Poland
… and limited dispersal powers in that region. A trampling investigation suggested that C. canescens may be very sensitive to heavy uncontrolled trampling and to vegetational succession under protection. Stages in succession of the C. canescens community were identified, and suggestions for …
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Movement and Mortality of White-tailed Deer in Southwest Minnesota
… density had on harvest efficiency, forage trampling, and litter decomposition. One experimental site was established in eastern South Dakota. Two separate experiments were conducted. The first experiment examined the effect of stocking density on utilization, harvest efficiency, and forage …
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Aiding conservation of the federally threatened Scutellaria montana (Lamiaceae, large-flowered skullcap) through abundance monitoring and transplantation studies
… transplantation site was fenced to prevent human trampling and apparently discouraged vertebrate grazing, resulting in dramatic flower number increases. The other transplantation site without fencing had mixed results with prescribed burning and canopy thinning treatments. Evidence suggested that …
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The relationship between invasive annual grasses and biological soil crust across Eastern Washington
… time (3 years), and 3) determine the effects of trampling on biocrust composition and species invasion over 3 years. I surveyed biocrust and invasive annual grasses in 168 plots across 21 sites along a precipitation gradient from arid to semiarid. I also resurveyed vascular plant species and …
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Taphonomy of a Lance Formation(Maastrichtian, WY) Dinosaur Bonebed with a Focus on Tooth Traces
… the Rose Quarry bonebed is attributed mainly to trampling. This study highlights the striking variability possible in fluvial bonebeds, including differences in pre-burial history, depositional mechanism, subenvironment, and post-burial history.</p> <p>Although only a few Rose Quarry bones show …
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Small mammal community structure (Rodentia: Muridae) in Punda Maria, Kruger National Park, South Africa : Causes and consequences
… sites and Acacia sites respectively. Trampling by megaherbivore activity impacted vegetation structure and has negatively affected rodent population and ground activity, particularly at the Acacia sites.
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Vegetation and flora of the Southern Drakensberg escarpment and adjacent areas
… whereas at the higher altitudes overgrazing, trampling and invasion by exotic plant species impact negatively on the native vegetation. A brief review of the history and previous botanical exploration of the area, as well as the physical environment are given. Four main plant communities -- …
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Scratching the Surface: A Content Analysis of Gorillas as Zoogeomorphic Agents
… of tool use (8) trunk uprooting, and (9) trampling. Data sets derived from the literature were used to provide a qualitative and quantitative summary of zoogeomorphic activity. Descriptive statistics were used to quantify literature reports and key zoogeomorphology studies were used to …
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Acclimating across healthy and degraded reefs
… areas’ (fragments subjected to fishing and trampling) and ‘protected areas’ (fragments with little human pressure) that occur in close proximity and now have differing community compositions and selective regimes. Theory predicts that the species able to survive in such conditions should …
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The feedback effects of canopy architecture : why are African acacias flat-topped?
… the height of the grass cover by grazing and trampling, and hence save the trees from fire. We suggest an animal - flat-topped tree mutualism where food and shade are exchanged for seed dispersal and fire protection.
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Assessing the effects of cattle exclusion practices on water quality in headwater streams in the Shenandoah Valley, Virginia
… through direct deposition and sediment through trampling. The main objective of this study is to assess the effects of different cattle management strategies on water quality. The project site was located near Keezletown, VA encompassing Cub Run and Mountain Valley Road Tributary streams. During …
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