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 19 of 19 for “"aquatic macroinvertebrate"”.
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Aquatic Macroinvertebrate Production in Predominant Habitats of a Warmwater Stream: The James River, South Dakota
… was conducted to gather information regarding aquatic macroinvertebrate habitat in the middle James River. Macroinvertebrate abundance, standing stock biomass, and production were quantified and compared among major instream habitats at two widely separated river sites. Three habitats that …
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Temporal Patterns of Aquatic Macroinvertebrate Communities and Organic Matter Standing Stock Availability in a Coastal Floodplain (Altamaha River, Georgia)
… of the US. This study aims to investigate how aquatic macroinvertebrate communities changed over the course of the annual flood pulse. I predicted that the communities would be different and that the differences would be driven by hydrology at the main stem and organic matter standing stock …
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Post-implementation re-assessment of agricultural best management practices on watersheds of Conesus Lake: Effects on stream water chemistry and aquatic macroinvertebrate communities
… monitoring periods. In addition, we performed an aquatic invertebrate diversity and biotic index study to determine if BMP streams have healthier populations of aquatic macroinvertebrates than non-BMP streams. We observed higher nutrient concentrations and loss of nutrients in the agricultural …
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The role of farm dams as refugia for aquatic invertebrates in a salinised landscape, south Western Australia
… undertaken at this wetland. Farm dams act as aquatic refugia if they convey resistance and/or resilience to the biotic communities of a disturbed habitat. This study proposed to investigate farm dams as potential refuge habitats from which aquatic macroinvertebrate species could recolonise …
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Spontaneous succession of riparian vegetation and aquatic macroinvertebrates along the Silvermine River, South Africa, after fire and clearing of exotic plant species
… of the physical habitats (biotopes) available to aquatic organisms, changes in the community composition of riparian vegetation, and changes to aquatic macroinvertebrate assemblages present in the river. Data were collected during two successive summer-sampling periods (200 I and 2002) at three …
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Assemblage characteristics and sampling considerations for aquatic macroinvertebrates inhabiting a lower Mississippi River stone dike
… of implanted substrates in sampling aquatic macroinvertebrate assemblages associated with stone dikes on the Lower Mississippi River and to obtain basic information on assemblage composition, structure, and patterns of distribution over a dike. For study purposes, stone-filled baskets …
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Community Compostition and Microhabitats of Macroinvertebrates on Sandbars within the Lower Missouri River as a Food Source for Foraging Migratory Shorebirds
… and determine the abundance and distribution of macroinvertebrates and fish using these microhabitats as a source of food for migratory shorebirds. Nearly 40 species of shorebirds migrate between breeding and wintering grounds through interior North America every year. There are documented cases …
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Evaluation of the Relationship Between Land Use and Water Quality in Kittitas County, WA
… An analysis of EPT percentage and HBI scores for aquatic benthic macroinvertebrates were used to infer biological condition. I found that land use had a significant effect on depth, discharge, temperature, specific conductivity, nitrate, phosphate, EPT, and HBI. Agricultural and urban land uses …
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Relationships Between Streamside Management Zone Width and Biotic Communities of Headwater Streams in West Virginia
… and total dissolved solids) as well as aquatic macroinvertebrate communities were monitored from June 2003 through March 2005. Average nitrate concentration in streams harvested with a 4.5 m SMZ was more than 4 times as high as that of control streams. Average summer and fall stream …
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The influences of hydrology and vegetation on emergent insect and benthic macroinvertebrate communities across space and time in seasonally inundated, geographically isolated wetlands
… However, they support a diverse community of aquatic macroinvertebrates, including insects that serve as energy in upland food webs when they emerge as adults. How aquatic macroinvertebrate communities, particularly emergent aquatic insects, respond to vegetation and differences in long-term …
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Community responses of aquatic macroinvertebrates to heavy metals in laboratory and outdoor experimental streams
This research describes aquatic macroinvertebrate community responses to heavy metals (copper, zinc) in experimental streams and at metal-impacted sites in the field. Experiments employed substrate-filled trays which were colonized in the field and then transferred to laboratory or outdoor streams. …
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Estrutura e função de comunidades de insetos aquáticos em um sistema fluvial de Mata Atlântica no sudeste brasileiro, com especial referência à avaliação do conceito de continuidade de rios (CCR)
… about the composition and structure of the aquatic insects communities along the longitudinal gradient of the Macaé river basin are exhibited. The spatial distribution of these communities, from a ritral section about 11 0üm high to a potamal area at about 20m high, were ali analysed by …
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Surface Water Quality and Aquatic Ecological Health in Central Appalachian Streams
… industries, a host of globally unique aquatic wildlife species, and region-wide poverty. These overlapping circumstances make solving environmental issues in the region challenging. Of particular focus is the coal mining industry, both because of its prevalence and because of …
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Streams in a changing landscape : identifying candidate reference reaches to assess the physical and biotic integrity of Missouri's wadeable streams
… with many present-day stream fish and aquatic invertebrate communities representing only a fraction of their historic constituents. Consequently, resource managers need the ability to predict areas of high and low biological integrity to inform management decisions and meet conservation …
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Effects of land-use change on benthic macroinvertebrates in the upper reaches of the Apies-Pienaar catchment
… these impacts on freshwater ecosystems. Benthic macroinvertebrates are extensively used as indicators of ecosystem health and have been an instrumental tool in ecosystem monitoring and management. The effects of changing land use on macroinvertebrates at a fine scale however, have not been …
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Conservation of an endangered amphibian: the case of the Natterjack toad (Epidalea calamita) in Ireland
… not be underestimated as they had 43% higher aquatic macroinvertebrate species richness and 33% higher macroinvertebrate abundance than natural ponds. Mark-recapture using photo ID and genetic fingerprinting suggested that extrapolation of total population estimates from egg strings alone may …
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The role of dispersal networks in structuring biotic communities: A tale of streams and metacommunity theory
… materials. Additionally, I demonstrated that macroinvertebrate communities in headwater streams respond more strongly to manipulations of local environment than do mainstem streams, both in terms of community composition as determined taxonomically and as functional traits. These results …
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Relationships Among Aquatic Macroinvertebrates, Endangered Waterbirds, and Macrophytes in Taro Lo'I At Hanalei National Wildlife Refuge, Kauai, Hawaii
… habitat conditions across the taro growth cycle, aquatic macroinvertebrate community characteristics, and the feeding ecology of koloa and moorhen during pre-breeding, nesting, brood-rearing, and molting when these waterbirds require increased protein, lipids, and minerals. Taro is grown at HNWR …