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Showing 1 to 20 of 73 for “"percent cover"”.
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Effects of Grazing by Feral Horses on Dune and Salt Marsh Vegetation at Cumberland Island, Georgia
… Species composition, species richness, percent cover, and grazed and ungrazed species across the 24 kilometers of coastline were sampled in 1 X 2m quadrats in two subhabitats: foredune/interdune and high/low marsh. Dune surveys measured and analyzed species richness, total percent cover …
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Effects of Amur Honeysuckle (Lonicera maackii [Rupr.] Herder) Invasion and Removal on Native Vegetation and White-Footed Mice (Peromyscus leucopus) in Mixed-Hardwood Forests of Indiana
… forests we examined the influence of density, percent cover, and duration of Amur honeysuckle (i.e., time since establishment), as well as other environmental factors, on native plant taxa. Overall, study sites with the highest taxonomic diversity (H‘), richness (S), percent covers, and …
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A REVIEW OF THE REMOVAL OF ARUNDO DONAX FROM A RIPARIAN AREA WITHIN SAN TIMOTEO CANYON
… Timoteo Canyon were analyzed in relation to new percent cover of the plant species, other more recent removals, and areas that did no experience removal procedures. The project included the use of data provided by the Inland Empire Resource Conservation District (IERCD) as well as the collection …
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INITIAL IMPACTS OF DIFFERENT FERTILIZERS ON IMPROVED EAST TEXAS EQUINE PASTURES
… pasture requirements.</p> <p>Initial vegetation cover was evaluated using the Daubenmire cover class method in September 2024, followed by a 60-day undisturbed growing period. Final biomass (g/2ft² converted to lbs/ac) and percent cover measurements were collected in November 2024. The data was …
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Sessile Invertebrate Colonization on Rocky Outcrops at Gray's Reef National Marine Sanctuary
… development is important for predicting recovery patterns after disturbance and designing effective marine reserves. In the South Atlantic Bight, invertebrate assemblages can differ significantly from one rocky outcrop to another, but the factors driving these differences are not well …
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Burrowing Owl Distribution and Nest Site Selection in Western South Dakota
… I used logistic regression models to examine how percent cover of grassland, cropland, trees, and prairie dog colonies at 4 spatial scales (buffers with radii of 400 m, 800 m, 1,200 m, and 1,600 m) impacted the probability of burrowing owls being detected in a prairie dog colony. Burrowing owls …
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The Suitability of Native Warm-Season Grasses for Equine
… during the experiment. Grazing reduced standing cover of native grasses in IG and BB treatments by about 30%, and trampled forage constituted 36-68% of groundcover in those plots after each grazing bout. Horses lost weight on all treatments, but tended (P=0.09) greater weight loss on the …
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Using Plant Functional Traits to Estimate Prairie Restoration Species Composition
… species composition by predicting the relative percent cover based on the age of a site Although Maxent’s performance in predicting plant species composition varied among sites, its performance in predicting relative percent cover of species present at sites was good (R2 = 0.62, P < 0.001). In …
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Conserving a charismatic grassland species in Illinois: the barn owl
… that nest outside of nest boxes are rarely discovered, an effective large scale survey method is needed. My goals for this project were to describe barn owl use of nest boxes, learn how they selected their nest sites, determine factors correlated with nest survival, and test playback surveys as …
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Forest vegetation response to the application of municipal sewage sludge in the coastal western hemlock zone
… parameters which were measured included relative percent cover, height, and biomass of individual species on systematic transects, as well as plot-wide Braun-Blanquet cover-abundance estimates. Relative percent cover was measured using the line-intercept method and plant heights were measured …
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Bayesian approach for modeling zero-inflated plant percent covers using spatial left-censored beta regression
… plant species, it is logical to record their percent cover, leading to observations between zero and one. With improving technologies, this kind of data is becoming increasingly popular while the need to model vegetation communities is high. However, zero-inflated models for continuous …
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Winter habitat use by mule deer in Idaho and Montana
… facing slopes with adequate thermal or canopy cover. However, not all mule deer habitats are equivalent in components or weather conditions, which contribute to differences in habitat use patterns and behavior among wintering populations. We examined winter habitat use by mule deer on the East …
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Winter habitat use by mule deer in Idaho and Montana
… facing slopes with adequate thermal or canopy cover. However, not all mule deer habitats are equivalent in components or weather conditions, which contribute to differences in habitat use patterns and behavior among wintering populations. We examined winter habitat use by mule deer on the East …
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Ecological effects of water hyacinth (Eichhornia crassipes) on Lake Chapala, Mexico
… but the magnitude of effects is dependent on the percent cover and potentially the spatial configuration of water hyacinth mats. Water hyacinth's effect on aquatic invertebrates, fish, and waterbirds is less predictable and dependent on conditions prior to invasion. In chapter 2, I tested for …
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The use of computer intensive statistical modeling in estimating the variability of marine fouling communities.
… to resolve ambiguities concerning the mean percent cover of a group of plates while many more are required to quantify the variability of the fouling population.
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Plant Successional Patterns at Sperry Glacier Foreland, Glacier National Park, MT, USA
… influencing alpine ecosystem change and recovery. Understanding these patterns and processes is important for conserving alpine landscapes and flora as glaciers disappear. This study sought to investigate how various biotic and abiotic factors influence plant successional patterns in the …
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Floristic dynamics of Appalachian pine-oak forests over a prescribed fire chronosequence
… seedlings increased in importance as a result. Percent cover and richness of herbaceous species increased, partly due to the post-fire germination and growth of various forbs and graminoids. Fire did not affect the abundance of exotic invasive species, but its effects on Ailanthus altissima were …
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Grassland and breeding bird use of moist-soil wetlands managed for waterfowl
… moist-soil wetland �� = 214.2, SE = 15.9). The percent cover of woody vegetation had a positive relationship with ACS, and the percent cover of forbs had a negative relationship with avian density. Sites that were disconnected from the river had greater avian conservation significance than …
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Modelling mitigation of bird population declines in the UK through landscape-scale environmental management.
… with scrubby vegetation variables, such as the percent cover of vegetation at 2-5 m and height Vertical Distribution Ratio (VDR). Beech woodlands supported the greatest number of declining bird species. Pine was overall poor bird habitat, signified by a negative relationship of the percent cover …
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Ecological Drivers of Plant Community Composition in a Patterned Fen at Seney National Wildlife Refuge, Michigan
… patterned fen at Seney National Wildlife Refuge. Percent cover of plant species and environmental variables were measured at 298 relevé style plots across 6 landform types: triangular swamp forests, featureless water tracks, peripheral water tracks, strings, flarks, and ponded sedge lawns. …
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