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 273 for “"macroinvertebrate"”.
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Novel approaches in macroinvertebrate biomonitoring
The increasing popularity of benthic macroinvertebrate use for biological monitoring and assessment of lotic systems calls for new applications for regions with a lesser known fauna and an overall better understanding of how community measures are influenced by seasonal variability. Two separate …
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Benthic Macroinvertebrate Susceptibility to Trout Farm Effluents
… effects of a Virginia trout farm on benthic macroinvertebrates were examined using multiple approaches. Static laboratory tests with the amphipod, Hyallela azteca, were conducted with exposures to water taken from a spring, effluent above a sedimentation basin, and effluent below a …
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Macroinvertebrate colonization and production in new experimental ponds
Benthic macroinvertebrate colonization of twelve 0.04-ha experimental ponds was studied for the 1st yr of their existence. The ponds were filled in late January 1988, and artificial substrate samples were retrieved at 4-wk intervals from February 25, 1988 to February 25, 1989. The first organisms …
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Macroinvertebrate communities inhabiting surface mine wetlands of southwestern Virginia
… have formed. This study investigates the macroinvertebrate community associated wetlands of relic surface mining operations. Surveys were conducted to identify what macroinvertebrates utilize these wetlands, to determine how this community was influenced by the physio-chemical …
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Multimetric assessment of freshwater macroinvertebrate communities in Flanders, Belgium
… fauna” (EU, 2000), commonly referred to as macroinvertebrates. For this quality element, the parameters “taxonomic composition and abundance”, “ratio of disturbance sensitive to insensitive taxa” and “diversity” should be taken into account. In Flanders, Belgium, the Belgian Biotic Index …
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River habitat modeling and evaluation for the whole macroinvertebrate community
L'abstract è presente nell'allegato / the abstract is in the attachment
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Macroinvertebrate community of ecology of lowland, subtropical streams in Louisiana
… attention. Therefore, I collected data on the macroinvertebrates of these streams to begin the understanding of the relationships between community structure and environmental characteristics. In contrast to the hypothesized ancestral streams of these macroinvertebrates, coastal plain streams …
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The Effects of Nutrient Concentrations on Macroinvertebrate Distributions in Georgia
… many problems to occur in the stream ecosystem. Macroinvertebrates have been established as good indicators for determining the level of impairment of a stream; however, not much research has been done on how nutrients affect macroinvertebrates in a stream. Approximately 225 reference and …
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A Study of the Macroinvertebrate Drift in the Des Moines River
… one segment of the aquatic fauna, the "drifting" macroinvertebrates. Procedure. Drift samples were taken at two points on the Des Moines River. One sampling station was located above Red Rock Reservoir and one below. Samples were taken every other week at each station, on two consecutive nights, …
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Assessing Macroinvertebrate Community Recovery in Post Restoration Silver Bow Creek, Montana
Since the turn of the twentieth century, mining activities have contaminated the floodplain and streambed of Silver Bow Creek, Montana, resulting in a streambed devoid of life and severely contaminated with heavy metals. In the mid nineteen seventies, up-stream water treatment facilities were …
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Assessing Macroinvertebrate Community Recovery in Post Restoration Silver Bow Creek, Montana
Since the turn of the twentieth century, mining activities have contaminated the floodplain and streambed of Silver Bow Creek, Montana, resulting in a streambed devoid of life and severely contaminated with heavy metals. In the mid nineteen seventies, up-stream water treatment facilities were …
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The effect of resource stoichiometry on fish and macroinvertebrate nutrient excretion
… of consumers at different trophic levels? Macroinvertebrates and fish were collected from six streams and nitrogen (N) and phosphorus (P) excretion were quantified. Epilithon, leaf detritus, and seston (fine particulate organic matter in transport) were collected and analyzed for carbon …
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Toward improved assessment of freshwater salinization as a benthic macroinvertebrate stressor
… been linked to decreased diversity of benthic macroinvertebrates. However, assessments used to reach this conclusion have generally not accounted for temporal variability of salinity, as most studies use "snapshot" SC data collected concurrently with biological data at a single point in time. …
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Spatiotemporal Variation in Dispersal as a Driver of Macroinvertebrate Metacommunity Dynamics
… forces. The mechanisms governing freshwater macroinvertebrates community assemblage have long been studied due these organism's ubiquity, diversity, and sensitivity to environmental stressors. Macroinvertebrates reliance on river networks for their larval stages also makes their dispersal …
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Recovery of Channel Morphology and Benthic Macroinvertebrate Assemblages after Livestock Exclusion
… but do not significantly improve the benthic macroinvertebrate assemblage. Detailed longitudinal and cross-sectional surveys, pebble counts, and rapid geomorphic assessments were conducted on contiguous, paired stream reaches (5 pairs) with and without active livestock access across a range of …
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Effects of Light and Macroinvertebrate Consumers on Detrital Microbial Biofilms in Streams
<p>In lotic freshwater systems, aquatic macroinvertebrates are key processors of biofilms that grow upon organic matter. Although macroinvertebrate effects on biofilms may depend on light availability, the combined effects of consumers and light remain unexplored. Here, I conducted experiments to …
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