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Showing 1 to 20 of 73 for “"Reference Sites"”.
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Using GIS and Land Use Data to Select Candidate Reference Sites for Stream Bioassessment
<p>GIS was used to select candidate reference sites in Georgia to characterize the reference condition by sub-ecoregion for a rapid bioassessment of streams statewide. Instead of relying on best professional judgment or previous knowledge of a limited number of sites, we performed an objective …
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Effects of acid mine drainage on limnological conditions and fish assemblages in the Cumberland Plateau region of the North Chickamauga Creek System, Tennessee
… mines. I assessed stream characteristics at 19 sites in the Cumberland Plateau region of the NCC system; these data were used to create a GIS database. Limnological conditions and fish assemblage attributes were compared between AMD-impacted and reference sites. Relationships were examined among …
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Exploring the relationship between restored ecosystem function and species composition: a meta-analysis
… function and species composition in restored sites to test whether such a relationship exists. Bray-Curtis similarity measures were used to compare species composition for each site compared to multiple reference sites. Indicators of ecosystem function were also compared to reference sites, …
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Himalayan Blackberry (Rubus armeniacus) Effects on Fish Habitat: Impacts from Riparian Zones Inundated with Himalayan Blackberry
… (Rubus armeniacus) plants (test conditions) (3 sites) and reaches with a riparian zone consisting primarily of native vegetation (reference conditions) (5 sites). This thesis studied streams in the lower mainland of British Columbia near Coquitlam, Maple Ridge, and Mission to assess fish habitat …
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The effects of forest disturbance on stream stability
… intermediate successional forests compared to reference sites. The abundance of large wood declined within 10 years of forest disturbance and continued to decline for at least 30-40 years through the intermediate stages of forest succession. Comparisons of inputs with standing stocks of organic …
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Bicycle and Pedestrian Traffic Monitoring and AADT Estimation in a Small Rural College Town
… count programs) derived from the continuous reference sites to estimate long-term averages (i.e., AADT) for short-duration count sites. I collected ~40,000 hours of bicycle and pedestrian counts from early September 2014 to January 2016. The count campaign included 4 continuous reference …
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The potential of restored landfill sites for biodiversity conservation in the UK
… Newly created grasslands on restored landfill sites are semi-natural habitats that could support a number of species. However, it is unknown whether these re-created habitats represent a significant resource in terms of biodiversity conservation though poor quality soil was being used for …
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Macroinvertebrate composition of the upper Georges River with reference to urban, industrial and agricultural impacts
… from two habitats, pool and edge at each of nine sites, for six surveys. The macroinvertebrates were sampled using standard kick net sampling. Samples were preserved, picked and identified to species level where possible. Physical measurements and water samples, were taken at each site for every …
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The effects of invasive European Buckthorn (Rhamnus cathartica) on soil microbial community composition
… from 97 pairs of buckthorn-invaded and uninvaded reference sites across 15 remnant woodlands in an approximately 5,500-km2 region of the Chicago area. The severity of the buckthorn-invaded sites was scored based on information about the age, basal area, canopy coverage, and sapling density of …
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Impacts of hypoxia on largemouth bass (Micropterus salmoides) behavior, physiology, and acclimation potential
… largemouth bass within the study site and three reference sites through field sampling, low oxygen shock trials, and Pcrit analyses (defined as the point at which an animal ceases aerobic respiration and begins anaerobic respiration). Results from this study indicate 1) largemouth bass did not …
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Seed mix design and application to overcome seed limitation in floodplain forest restorations
… compositional differences between restored and reference forest understories are apparent. To enhance the compositional similarity of restored understories with those of reference sites, I used the species pool model and indicator species analysis to identify 36 indicator species of reference …
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The Potential for Eutrophication Mitigation from Aquaculture of the Native Oyster, Crassostrea virginica, in Chesapeake Bay: Quantitative Assessment of an Ecosystem Service
… (anammox) pathways, at two oyster aquaculture sites and two reference sites (no aquaculture), we found that oyster biodeposition did not accelerate sediment N removal. We estimate sediment N removal rates via N2 production at an oyster cultivation site producing 5 x 105 oysters (1750 m2) to …
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Metal and Metalloid Contaminants in Atmospheric Aerosols from Mining Operations
… campaign, ambient particulates from five mining sites and four reference sites were examined utilizing micro-orifice deposit impactors (MOUDI), total suspended particulate (TSP) collectors, a scanning mobility particle sizer (SMPS), and Dusttrak optical particle counters for an understanding of …
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Studies of Benthic Macroinvertebrates in Western Virginia Streams as Related to the Implementation of Rapid Bioassessment Techniques
… ecoregion classification scheme, I classified my reference sites in biotic groups and then assessed the effect of several environmental variables on discriminating between the groups. There was a 69.8% correct classification rate using 14 environmental variables. Stepwise multiple discriminant …
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Biotic Integrity in the Northwestern Great Plains and Mechanisms Regulating Stream Condition in South Dakota
… and second identifying regional candidate reference sites by applying statistical distributions defined from field data and multivariate discriminant analysis and ATtILA to validate those candidate reference sites. For the development of the IBI, 65 sites were sampled in the NWGP ecoregion …
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Examination of Direct and Indirect Effects of Legacy Industrial Pollution On Organ Growth in Wild Yellow Perch (Perca flavescens)
… in wild yellow perch from impacted and reference sites across the Detroit River and Lake St. Clair. Overall, sites with higher levels of contaminants exhibited increased cyp1a1 expression, food web disruption, lower relative brain size, and higher relative liver size. However, the …
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Local marine wastewater discharges : characterisation and impacts
… the vicinity of the two major sewage outfall sites in the Maltese Islands, and from selected reference sites, were also sampled in November 2005 so as to identify level of heavy metals (namely cadmium, copper, lead and zinc), and relate these to the loads of the same metals being released by …
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Aquatic microbial community responses to stress: comparison of nontaxonomic and taxonomic indices
… d, and species richness relative to upstream reference communities. Nontaxonomic responses were consistent in four separate field tests. Significant differences in responses were discernible in 3 d when communities were transferred from reference to polluted sites. Chla/Pheo decreased more …
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Remediation and restoration of ocean exposed cliff-top, in the context of Dounreay (Scotland) nuclear power plant decommissioning
… biodiversity losses. Post-industrial restoration sites pose a number of additional challenges, including balancing ecological need with logistical and financial constraints. In the North of Scotland, one such site is the Dounreay Nuclear Power Plant, now undergoing decommissioning. The intention …
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The changing landscape of energy generation in Virginia: How construction of utility-scale solar sites impacts soil physical and hydraulic properties
… a stabilized utility-scale solar site and seven reference sites that represent common land uses in the area, such as forest, cropland, grassy areas, and pine plantation. Permeability was measured at the soil surface using single ring infiltrometers and in the subsurface using borehole …
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