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 47 for “"bioindicators"”.
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Organophosphorous insecticide contamination in streams: Insects as bioindicators
1 PDF file (xii, 171 pages)
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Comparing Reef Bioindicators on Benthic Environments off Southeast Florida
A goal of the U.S. Environmental Protection Agency is to develop protocols applicable to coral reefs to distinguish between the effects of local water quality and those associated with regional to global environmental change. One test case is the current-dominated southeast coast of Florida where …
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Assessing biofilm and epiphytes on seagrass leaves as bioindicators of environmental change
… are frequently studied and are considered good bioindicators of light limitation, however, faunal epiphytes have rarely been considered. The objective of this research was to determine the effect of two different environmental pressures on seagrass biofilm and epiphytes within temperate seagrass …
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Biodiversity assessment of groundwater-dependent ecosystems in Malta : evaluating copepods as bioindicators of groundwater health
… (GDEs) in Malta, focusing on copepods as bioindicators of groundwater health. Groundwater is essential in sustaining GDEs, yet these ecosystems remain underexplored, particularly in terms of local biodiversity. The aim of this research is to assess the biodiversity of groundwater …
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Assessing the use of periphyton as bioindicators of water quality, for use in Namibian inshore waters
Submitted in partial fulfilment for the degree of Master of Science (Environmental Science)
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Mammalian carnivores as bioindicators to evaluate the exposure and bioaccumulation of organic contaminants in terrestrial ecosystems
To address my first objective, I opportunistically collected road-killed bobcats (n=44) throughout Illinois during 2013-2014, and analyzed their liver tissue for the presence of PCBs, PBDEs, and various other alternative halogenated flame retardants. Concentrations of ∑PCBs ranged from 76.4 ng/g lw …
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Lacustrine Arcellinida (Testate Lobose Amoebae) as Bioindicators of Arsenic Contamination: A new tool for Environmental Risk Assessment
Gold mining in northern Canada, while profitable, has left a legacy of arsenic (As) contamination, especially in lakes. Arcellinida, lacustrine benthic protozoans, have great As-biomonitoring potential that has yet to be exploited by lake restoration initiatives. This research aims to further …
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Using state-space time series analysis on wetland bird species to formulate effective bioindicators in the Barberspan wetland
… each other, and individual waterbird species as bioindicators for various wetland traits, the end user is presented with a broad overview of the state of the Barberspan wetland. The implication of this research is beneficial to various wetland conservation organisations globally (AEWA, Aichi, …
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Relations among biochemical, individual, and community indicators of stress in fish: stream degradation in the Clinch River drainage
Bioindicators were used to assess degradation to fish resident to the Clinch River drainage. Species studied were rock bass (<i>Ambloplites rupestris</i>), northern hogsucker (<i>Hypentelium nigricans</i>) and striped shiner (<i>Luxilus chrysocephalus</i>). The data were collected in parallel with …
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Bioindicators of Reductive Dechlorination in a Dehalococcoides ethenogenes-Containing Mixed Culture: Transcriptional Trends With Respect to Substrate Type, Substrate Concentration, and Culture Operation
… enzymes were selected for study as potential bioindicators of reductive dechlorination in DET. Quantitative reverse-transcriptase PCR (qRT-PCR) data on selected gene transcripts in batch PCE-fed microcosms indicated that a subset of targets, including RDases TceA, PceA, DET1559 and DET1545, …
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An Integrative Approach to Evaluating Radiocesium Contamination in Fukushima Prefecture
… in vermiculite, 2) using plants as bioindicators to elucidate long-term radiation exposure and testing the bioindicators as possible sources of phytoremediation, and 3) experimenting with a Cs<sup>+</sup>-capturing ligand to develop a chemical extraction method that can be used to …
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Effects of heavy metals on the physical activity and survival of freshwater clams
… clams (Musculium spp.) could be appropriate bioindicators for monitoring water quality in the CDA drainage. In a field-caging assay along the polymetallic gradient in the drainage, clam survival was significantly higher in the unpolluted portion of the drainage (P < 0.001). Laboratory assays …
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Pathways of Transport of Microcystin-LR from Microcystis aergonisa to the Benthic Environment
… </em>blooms. Bivalves are known to be bioindicators of contaminants, since they are sessile organisms that are filter feeders and deposit feed from sediment bottoms. To current knowledge, there is no mandated CHAB monitoring in California, which is important to predict or mitigate …
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Benthic metrics as indicators of human disturbance in a marine-dominated lagoon
… to mankind, it is important to identify key bioindicators that can detect disturbance-induced ecosystem change. Benthic metrics are an excellent example of disturbance indicators in soft sediment based aquatic systems, and are directly applicable to one of South Africa’s most economically and …
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Host associations and pollution responses of ciliate epibionts of macroinvertebrates in the six rivers in the Western Cape Province of South Africa
… River was examined to assess their potential as bioindicators of water pollution.
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Insects as Bio-Indicators
… Academy) that highlights the use of insects as bioindicators and bio-monitors for environmental and climate change. This project includes the creation of a road map for the development of a docent facilitated Multi-User Simulation with Handheld Integration (MUSHI) interactive for the exhibition. …
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Biomonitoring of Stream Water Quality: Comparative Sensitivities of Macroinvertebrate Indices and Leaf Decomposition Rates
… chemistry. Hoever, even these commonly used bioindicators did not show consistency in their designation of the water quality at each site. The data from this study suggest that the use of decomposition rates as a stand-alone indicator of water quality may not be possible, but it is still a …
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Lizdavietėse-gaudyklėse apsigyvenančių klosčiavapsvių (Hymenoptera: Vespidae: Eumeninae) vystymasis ir rūpinimosi palikuonimis elgsena /
Since Hymenoptera Aculeate are known to be bioindicators, which are sensitive to environment change, fragmentation of habitats and antropogenous impact, these insects may have an importance in environment conservation. The purpose of our study was to establish impact of nesting cavity parameters …
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Seafloor Sediment Bacterial Community Profiling for Baselines and Environmental Effects Monitoring at a Deep-Sea Oil Production Site Offshore Nova Scotia, Canada
… Slope sediment identified potential bacterial bioindicators of pristine and contaminated conditions, relative to baseline, underpinning an environmental monitoring approach that is proposed. This study shows that bacterial rRNA gene amplicon sequencing offers a novel parameter for baselines and …
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