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.
Results
Showing 1 to 20 of 34 for “"Macroinvertebrate assemblages."”.
-
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 …
-
Biodiversity patterns of wetland macroinvertebrate assemblages in the South-Western Cape, South Africa
… patterns of wetland macro invertebrates assemblages in the south-western Cape, South Africa. 140 wetlands were sampled in four geographic clusters, the Cape Flats, the West Coast, the Cederberg and the Agulhas Plain. Open-water, submerged vegetation and emergent vegetation habitats were …
-
Impacts of Land-Use on Leaf Breakdown and Macroinvertebrate Assemblages in Southern Appalachian Streams
… role to a lesser extent. Impacts of land-use on macroinvertebrate assemblages are examined in Chapter 2. Shannon diversity, %EPT, and NCBI were significantly related to land-use regime. There were significant negative relationships between macroinvertebrate diversity and conductivity and …
-
Influence of nature preserves on macroinvertebrate assemblages, water quality, and habitat quality along two urban streams
… of nature preserves in urban areas on stream assemblages can lead to more effective stream restoration. Benthic macroinvertebrates and water quality in two streams, Poplar Creek and Spring Creek in the Fox River watershed of northeastern Illinois, were monitored along an urban stream continuum …
-
Effects of Stream Crossings on Macroinvertebrate Assemblages of the Upper Current River, Ozark National Scenic Riverways, Missouri
… examined the impact of road crossings on benthic macroinvertebrate communities in a wadeable Ozark river. I collected macroinvertebrates during winter and summer from four riffle locations (upstream, at crossing, downstream, and farther downstream) at each of five sites in the upper Current River …
-
Effects of watershed land use on the benthic macroinvertebrate assemblages in ridge and valley streams in Chattanooga, Tennessee
… June 18, 1998 using quantitative and qualitative macroinvertebrate sampling techniques. All streams sampled were part of the Tennessee River drainage system and eventually contribute to Nickajack Reservoir. The 20 sites were second to fourth order streams with drainage areas of 3.8 to 46.9 (km2) …
-
Assessment Of The Macroinvertebrate Assemblages From The Mesohabitats Of A Headwater Stream-Wetland Hydrologic Restoration In Eastern Kentucky
… The goal of this study was to quantify macroinvertebrate assemblages from Slabcamp Creek and compare the assemblages to a site representing Kentucky Division of Water's headwater reference conditions and a pre-restoration condition control site. Specific objectives included: 1) compare …
-
Quantifying the environmental factors that determine benthic macroinvertebrate assemblages in streams by analyzing stressors associated with a gradient of cattle grazing
Relationships between macroinvertebrate assemblages and environmental stressors were assessed from fall 2002 through spring 2004 in five small streams that represented a study design that involved a gradient of increasing stress (increased cattle density). Macroinvertebrate assemblages were related …
-
Biological assessment of tropical riverine systems using aquatic macroinvertebrates in Tanzania, East Africa
… This thesis describes the development of a macroinvertebrate-based bioassessment method for assessing the degree of anthropogenic disturbance in Tanzanian rivers. The hypotheses that, 'macroinvertebrate assemblages reflect disturbance in river systems'; 'rivers with similar abiotic features …
-
Studies of Benthic Macroinvertebrate Use for Biomonitoring of Mid-Atlantic Highland Streams
… does not appear to be causing impairment to the macroinvertebrate assemblages. Streams in the SNP were found to recover quickly from disturbance. The Macroinvertebrate Aggregated Index for Streams (MAIS) was found to have an overall classification efficiency (CE) of 86% in the Ridge and Valley …
-
Ecological aspects of the macroinvertebrates associated with two submersed macrophytes in Lake Kariba
… than Vallisneria. This study considered the macroinvertebrate assemblages associated with the two plant species with respect to (i) differences in structural complexity, (ii) predator-prey interactions and (iii) water physicochemical conditions.
-
Evaluating the Potential Impacts of Municipal Wastewater Effluent on Benthic Macroinvertebrates in the Upper Bow River
… through characterizations of the benthic macroinvertebrate assemblages in the mainstem and experimental stream systems associated with Calgary’s Pine Creek wastewater treatment plant. Changes to benthic macroinvertebrate assemblages on a longitudinal gradient and cumulative exposure to …
-
Ecologically relevant low flows for riverine benthic macroinvertebrates: characterization and application
… degrees of physical disturbance to benthic macroinvertebrate assemblages of perennial rivers.
-
On the development of flow-ecology relationships for streams in coastal watersheds of southern California
… flow-ecology relationships between benthic macroinvertebrates and the hydrologic and hydraulic regimes of 32 biomonitoring sites spanning a gradient of watershed urbanization. Associations between landscape, streamflow, and biotic metrics indicate that flow permanence and urbanization are …
-
Nutrient enrichment modulates the structure and temporal assembly of riverine benthic algal and macroinvertebrate assemblage.
… communities. By studying benthic algal and macroinvertebrate assemblages from 35 streams over two years that spanned a wide gradient of nutrient enrichment, I found that the temporal assembly patterns of both assemblages were heavily influenced by novel nutrient concentrations. …
-
Ecology of acidification and recovery in Welsh upland streams
… revealed sustained effects of acid stress on macroinvertebrate assemblages. Acid streams supported fewer grazers and filter-feeders than circumneutral waters but other functional groups were less affected by low pH. Field experiments tested the effects of acidification on two key processes in …
-
Investigating Historical and Contemporary Land Cover Effects on Macroinvertebrate Communities and Water Quality of Virginia Piedmont Streams
… historical and contemporary land cover and macroinvertebrate communities, water quality, and nutrient levels in 10 streams in a historically agricultural region of the Virginia Piedmont. Historical (1963) and contemporary (2011) impervious surface, open area, and forested cover were …
Page 1 of 2