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 22 for “"filter-feeders"”.
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Evaluating non-point source microplastic pollution and its impact on biota in the Huron River
… pollution to the Huron River, 2) if aquatic filter feeders ingest microplastics, and 3) how the interaction of microplastics and pharmaceuticals affect filter feeders. To address my first goal, I measured the microplastic load of the Huron River at Waterworks Park in Ypsilanti, MI, between …
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Benthic-pelagic coupling : rocky intertidal communities and nearshore oceanographic conditions across multiple scales
… particularly (1) competitive dominance by filter feeders and gardening limpets and (2) habitat facilitation by filter feeders partially account for local differences in functional-group abundances. Nearshore oceanographic conditions were characterized using satellite-measured sea surface …
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Endobenthic Ecosystem Engineering: influence of sandprawns (Callichirus kraussi) on zooplankton assemblages
… phytoplankton is a major trophic resource for filter feeders, any effect of sandprawns in reducing phytoplankton biomass may generate possible indirect effects on filter feeders such as zooplankton assemblages. To date, there has been no known research addressing questions on density of …
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Ecology of acidification and recovery in Welsh upland streams
… 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 stream ecosystems, benthic algal grazing and leaf decomposition. Grazer …
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Development of safe and ready to eat frozen oyster products using microwave steam-venting technology
… for at-risk populations. Oysters are filter feeders. They tend to concentrate microbes present in surrounding waters, some of which can cause severe illness in susceptible humans. Among pathogens that contaminate the gastrointestinal system of oysters, Vibrio spp (especially V. …
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Determining the Trophic Role of Gulf Menhaden (<i>Brevoortia patronus</i>) Using Carbon and Nitrogen Stable Isotopes
… roles in the Gulf of Mexico coastal ecosystem as filter feeders and as an important food source for many recreationally and economically important finfish. Gulf menhaden also support a large commercial fishery, and little is known about the impact of fishing on the role of this species as a filter …
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The ecological energetics of the net-spinning caddisfly, Hydropsyche venularis Banks (Trichoptera: Hydropsychidae)
… The fecal pellets are then available to other filter-feeders and deposit feeders. Higher consumption rates may therefore increase the efficiency of the ecosystem.
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Pathways of Transport of Microcystin-LR from Microcystis aergonisa to the Benthic Environment
… 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 future blooms. The results of this paper indicate remote sensing, water …
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Large-scale forcing of coastal communities
… with the Clyde expected to be dominated by filter feeders with potentially greater larval recruitment, increased density, faster growth and larger maximum sizes.<br/>The study was divided into five sections examining community structure, growth rates, predation and grazing pressures, effects …
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Studies on the meiofauna of rocky shores
… exposed shores, where the biomass of macrofaunal filter feeders was very high. It has previously been argued that differences in meiofaunal communities between plant species are a result of differential surface area, number of habitats and refugia from predation. The possible fate of meiofaunal …
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Alternative approaches for monitoring aquatic ecosystems: a study on the effects of municipal sewage effluent on biota in the South Saskatchewan River
… biomass and areal lipid content of gatherers and filter feeders immediately downstream of the effluent discharge suggests organic enrichment effects, whereas a reduction in scraper and predator biomass and lipid content indicated organic enrichment and toxicological effects. Measurements of …
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Freshwater Mussels as Biofilters
Freshwater mussels (Bivalvia: Unionidae) are filter feeders, removing phytoplankton and other suspended particulate matter from the water. The removal of suspended matter from water is often considered desirable, in order to reduce algal blooms and in the treatment of drinking water. This thesis …
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Potent but forgotten: nitrous oxide contributions by an ascidian on warming reefs
… However, recent studies suggest that marine filter feeders are also important producers of N2O, with only a limited number of taxa investigated for their N2O potential. This thesis uses an interdisciplinary lens to study coastal N2O production in a warming world, linking emerging sources of …
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Quantitative ecology reveals scale-dependent structural processes of the Antarctic benthos through time
… epibenthic community dominated by suspension and filter feeders. Bayesian Network Inference showed that no single group controlled the network structure. Unlike in very shallow Antarctic systems, predators, especially starfish, though present, had little ecological impact, showing that …
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Biogeography and potential factors regulating shallow subtidal reef communities in the western Indian Ocean
… particulate organic matter (POM) support filter-feeder biomass and drive biogeographic patterns. A large-scale biogeographic analysis was conducted using quantitative biomass data derived from 55 shallow subtidal reefs spanning five countries in the western Indian Ocean. Two statistically …
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Effects of burrowing sandprawns (Callichirus kraussi) on urban estuarine water quality
… quality, for example microorganisms, plants and filter feeders have already been shown to mitigate eutrophication. However, burrowing endobenthic organisms have not yet been considered as a NBS, despite their potential to greatly impact water quality. Therefore, the purpose of this study was to …
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Ecological controls on density, diversity and community structure of Polar Megabenthos
… Epibenthic megafauna in the south are dominantly filter feeders and in the north deposit feeders. Megabenthic diversity and density decreased to the northeast of the channel. Lebensspuren number and area increase northwards in the Channel. The increase in bioturbation and deposit feeder abundance …
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Statistical analyses of extinction in the marine fossil record
… in the stage. The results suggest that sessile filter feeders (particularly those groups important in ancient reefs) and pelagic groups suffered the greatest during intervals of mass extinction. Finally, the potential relationship of familial diversity to both sea level and I7Sr/86Sr ratios was …
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Predator-prey dynamics under the influence of exogenous and endogenous regulation : a data-based modeling study on spring plankton with respect to climate change
… were observed in both communities. Interception feeders alternated with filter feeders, and cryptomonads with non-cryptomonads in their relative importance. These dynamics were not captured by classical 1-predator-1-prey models which consistently predict pronounced predator-prey cycles or …
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Fate and transport of Asian carp eggs in spawning rivers
… River Basin. This invasive species are filter feeders that consume phytoplankton and zooplankton thus competing directly with native species as their diets overlap. Asian carp can lay thousands of eggs and have the potential to spawn up to three times per year. Moreover, there is a …
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