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Thematische Bibliographien / Estuarine pollution / Dissertationen

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Dissertationen zum Thema „Estuarine pollution“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 2. März 2023

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1

Quinnell, Susan Elizabeth. "Estuarine Canaries: Macrobenthos Measures Pollution when Chemical Tests Cannot." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/366573.

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Bramble Bay, an estuary with a long history of contamination, appears to have crossed multiple tipping points into a state of unstable biomass dominated by opportunistic species. In early 1996 mass mortality events began to affect the bay’s macrobenthic community within a few days of modest rainfall (30 mm) over the catchments. The numbers of wading birds and fish using the beach at such times greatly declined. Between mortality events the macrobenthos staged partial recoveries. However, 10 years later the beach had not attained the diversity of species it supported prior to 1996. Also, the ri

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2

Liu, Yang Ping. "Modelling estuarine chemical dynamics of trace metals." Thesis, University of Plymouth, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360359.

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3

Cantwell, Mark G. "Mobility and fate of contaminants in estuarine environments /." View online ; access limited to URI, 2006. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3248226.

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4

Knock, Clare. "Finite element modelling of estuarine hydrodynamics." Thesis, University of the West of England, Bristol, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258716.

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5

O'Shea, Francis Timothy. "Assessment of diffuse pollution originating from estuarine historical landfills." Thesis, Queen Mary, University of London, 2016. http://qmro.qmul.ac.uk/xmlui/handle/123456789/12995.

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The UK contains 5000 unlined historical landfills in the coastal zone currently at risk of erosion within the next 50 years. These rely on natural attenuation in surrounding sediment to reduce the contaminant load to the environment. This thesis investigates the extent and magnitude of sediment metal contamination from historical estuarine landfills. An intensive investigation of Newlands historical landfill, Essex, indicated elevated metal concentrations in surface and sub-surface sediments. Surface sediment concentrations were similar to other industrially impacted estuaries, whilst peak met

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6

Raymundo, Cristina Coelho. "Linear alklbenzenes in marine and estuarine sediments." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317231.

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7

Yang, Meng. "Historical changes in heavy metals in the Yangtze Estuary." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61961.pdf.

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8

Jiang, Dongxiang. "The application of Kriging technique to mathematical modelling of estuarine water quality." Thesis, University of Newcastle Upon Tyne, 1989. http://hdl.handle.net/10443/530.

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It is essential that estuarine modelling and surveying are carried out simultaneously because not only does the latter provide data required by the former but also the former is verified with data from the latter. This study integrates both research subjects from the panoramic point of view, aiming at improving modelling accuracy and reliability and increasing survey efficiency. Partially stratified estuaries are the most difficult types of estuaries to be modelled, in particular, the velocity field in such an estuary. A review of two commonly used methods to determine the velocity field, i. e

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9

Watts, Sarah E. J. "The impact of urban runoff on estuarine pollution, the River Lagan, Belfast." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263580.

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10

Mazik, Krystina. "The influence of a petrochemical discharge on the bioturbation and erosion potential of an intertidal estuarine mudflat (Humber estuary, UK)." Thesis, University of Hull, 2004. http://hydra.hull.ac.uk/resources/hull:7047.

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The influence of sedimentary variables on the structure and function of infaunal estuarine and marine communities is well studied but less is known of the influence of biota on sediment properties. Feeding and burrowing activity, locomotion, the production of faecal pellets and biological secretions (bioturbation) have important implications for sediment structure, chemistry, transport characteristics and the flux of nutrients and contaminants. Although spatial and temporal patterns in bioturbation have been studied to some extent, little attention has been given to the effects of pollution. T

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11

Laranjeiro, Filipe Miguel Grave. "Integrative approach for the assessment of TBT pollution in estuarine areas." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/8768.

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Mestrado em Toxicologia e Ecotoxicologia<br>As áreas estuarinas são geralmente focos de poluição por estarem sujeitas a uma intensa actividade antropogénica. Um exemplo disso é a poluição por tributilestanho (TBT) - um agente biocida presente nas tintas anti-incrustantes aplicadas nos cascos de embarcações. Como os estuários albergam frequentemente portos comerciais, marinas e estaleiros navais, existe aqui um intenso tráfego naval e uma elevada libertação de TBT para a água, contaminando assim todo o ambiente estuarino. Apesar da utilização do TBT em tintas anti-incrustantes de embarcaç

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Ramachandran, Shahunthala Devi. "Toxicity associated with sediments from Malaysian estuarine environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23170.pdf.

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13

Sutherland, John David Wightman. "'Hidden' arsenic in estuarine systems." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326789.

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14

Althaus, Martin. "Dissolved trace metals in the estuarine plumes of the Humber, Thames and Rhine rivers." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316029.

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15

Park, J.-K. "Modelling of pollutant dispersion." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353447.

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16

Mills, David John Labbett. "The impact of hydrocarbon pollution on meiobenthic production within an estuarine mud-flat." Thesis, Heriot-Watt University, 1988. http://hdl.handle.net/10399/997.

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17

Suwanrut, Jintana. "A study of the use of complexing agents to assess the availability of metals in estuarine sediments." Thesis, University of East Anglia, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297490.

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18

Jemmett, Alan William Lancaster. "An investigation into the heavy metals, sediment and vegetation of a Mersey Estuary salt marsh." Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333688.

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19

Zoozi, Suha. "An evaluation of particulate phosphorus storage in an agricultural estuary." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/2774.

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Knowledge of fine sediment delivery (both timing and loading) is fundamental to the assessment of non-point source pollution in estuarine environments. This study comprised three key components that led to the development of a fine sediment and particulate associated phosphorus budget in a typical agricultural estuary. Firstly, to explore catchment inputs, turbidity and flow were monitored continuously upstream of the freshwater/saline interface on the main stem channel of the south Devon River Avon, which drains a medium sized agricultural catchment (area 340 km2), in southwest UK. Thirty-fiv

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Grundy, Sarah R. "Investigations on the use of fucus germlings in the study of estuarine and coastal pollution." Thesis, Heriot-Watt University, 1996. http://hdl.handle.net/10399/700.

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21

Njue, Cyprian. "Metal migration from coastal and estuarine landfills : an integrated geological study from southern England." Thesis, University of Brighton, 2010. https://research.brighton.ac.uk/en/studentTheses/d4b5da60-337f-4cb8-9933-28c8e9f7022e.

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Uncontrolled landfills can cause the release of significant contamination. In South England and in other parts of the UK, historical landfills are spread along the coastal and estuarine marshes and mudflats, where waste was dumped without regard to the environment. Much of the pollution from these landfills may have been dispersed and diluted into coastal waters with little impact. However, fine-grained sediments within these environments may have trapped or sequestered metals. The aim of this study is to investigate the degree to which heavy metals from these historical sites may have contami

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22

Bauman, Stephanie. "ACUTE CHROMIUM (CHROMIUM(+VI)) TOXICITY IN THE ESTUARINE SHRIMP, MYSIDOPSIS BAHIA (CRUSTACEA: MYSIDACEA)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/291245.

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23

Kaambo, Eveline. "Investigation of South African estuarine microbial species and genome diversity." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8171_1186398717.

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<p>A study of the microbial diversity in sediments of the Great Berg River estuary is carried out using modern molecular phylogenetic methods. The aim of this study was to determine the effect of (pollution by) the effluents of the fish industry on the composition of the microbial community in the sediments. The diversity in microbial groups of sediment samples that received wastewater from the local fishing industry was investigated by a PCR-DGGE (polymerase chain reaction-denaturing gradient gel electrophoresis) approach and compared to an unaffected site.</p>

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CORDEIRO, LIVIA GEBARA MURARO SERRATE. "STEROLS AS MOLECULAR MARKERS OF FECAL POLLUTION IN IGUAÇU-SARAPUÍ ESTUARINE SYSTEM, GUANABARA BAY NORTHEAST (RJ)." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8904@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O presente trabalho tem como objetivo investigar a contaminação por esgotos domésticos do sistema estuarino formado pelo rio Iguaçu e canal de Sarapuí, localizados na porção noroeste da Baía de Guanabara, através da determinação de esteróis e composição elementar (C e N) da matéria orgânica em amostras de material particulado em suspensão e sedimentos, e da caracterização físico-química e química da água e sedimento. As amostragens foram realizadas em março/2004 e setembro/2004, em 7 estações de água e 10 de sedimento, dis

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Rainey, Michael Patrick. "Airborne remote sensing of estuarine intertidal radionuclide concentrations." Thesis, University of Stirling, 1999. http://hdl.handle.net/1893/2275.

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The ability to map industrial discharges through remote sensing provides a powerful tool in environmental monitoring. Radionuclide effluents have been discharged, under authorization, into the Irish Sea from BNFL (British Nuclear Fuels Plc.) sites at Sellafield and Springfields since 1952. The quantitative mapping of this anthropogenic radioactivity in estuarine intertidal zones is crucial for absolute interpretations of radionuclide transport. The spatial resolutions of traditional approaches e.g. point sampling and airborne gamma surveys are insufficient to support geomorphic interpretations

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Crabb, Rebecca. "A dynamic game for managing a conservative pollutant in an estuary /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6768.

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27

Dove, Michael Colin Geography Program UNSW. "Effects of estuarine acidification on survival and growth of the Sydney rock oyster Saccostrea glomerata." Awarded by:University of New South Wales. Geography Program, 2003. http://handle.unsw.edu.au/1959.4/20485.

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Estuarine acidification, caused by disturbance of acid sulfate soils (ASS), is a recurrent problem in eastern Australia. Affected waters are characterised by low pH and elevated concentrations of metals, principally aluminium and iron. The effects of acid and elevated metal concentrations associated with ASS, on adult Sydney rock oysters, have not been previously investigated. This study tested links between ASS-affected drainage, subsequent estuarine acidification and Sydney rock oyster production problems on the Hastings and Manning Rivers, mid north coast New South Wales. The primary object

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Rodrigues, Ann Maria de Jesus. "Environmental status of a multiple use estuary, through the analysis of bethnic communities : the Sado estuary, Portugal." Thesis, University of Stirling, 1992. http://hdl.handle.net/1893/2597.

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Ihis work on the Sado outer estuary (western coast of Portugal) considers its bio-sedimentary characterization, and evaluates the prevailing hydrophysical and sedimentary environmental conditions. The quality status of the estuary is discussed. The thesis is based on the analysis of superficial sediments and benthic macrofauna collected from 133 sites, and on hydrodynamical data obtained from a mathematical model. The environmental variables considered were the superficial sediment temperature, granulometry and organic matter content, together with the water current velocities, flow and shear

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Kampire, Edwige. "Characterization of polychlorinated biphenyl residues in the North End lake and Port Elizabeth harbour, South Africa." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/7903.

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Persistent organic pollutants (POPs), including polychlorinated biphenyls (PCBs) are widespread in aquatic systems, they can bioaccumulate in the tissues of aquatic organisms, especially fish as they occupy a position near the top of the aquatic food web. PCBs are among the most toxic substances and have been shown to cause many adverse effects to humans and wildlife. High health risks are associated with populations that follow a diet high in fat content such as fish and shellfish in which PCBs bioaccumulate. Given the importance of industries and the potential health concerns of exposure to

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Stringer, Tristan James. "Development of bioassay approaches to evaluate the impacts of pollution on New Zealand estuaries using the marine copepod Quinquelaophonte sp." Thesis, University of Canterbury. Biological Sciences, 2012. http://hdl.handle.net/10092/7438.

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Worldwide, estuaries are under increasing pressure from numerous contaminants. There is a need to develop reliable bioassay methodologies to assess the effects of these stressors on estuary health. This thesis aimed to develop and validate toxicity tests in a New Zealand marine harpacticoid copepod species for use in monitoring and evaluating the effects of estuarine pollution. A survey and toxicological assessment of a range of native copepod species resulted in the selection of Quinquelaophonte sp. as the ideal bioassay species. This selection was based on a broad regional distribution, ease

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Fernandes, Teresa Faria. "An experimental field study of the effects of oil pollution on the structure and functioning of estuarine intertidal communities." Thesis, University of Aberdeen, 1992. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU052837.

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The main objective of this thesis was to study the effects of crude oil extracts on intertidal sediment communities. The approach was to focus on community structure and investigate the impact of a specific perturbation, crude oil extracts, relating to hypothetical oil spill situations. Both the impact of different disturbances on the same benthic community (i.e. with uniform structure) and the impact of the same disturbance on differently structured benthic communities were investigated. The effects on number of species, distribution of individuals between species and diversity were analysed,

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Pratt, Catherine, and n/a. "Investigations into Faecal Sterols and E.Coli as Indicators of Sewage and Non-Sewage Inputs into a Subtropical Estuarine Embayment System in South Eastern QLD, Australia." Griffith University. School of Environmental and Applied Science, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070124.111827.

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Sewage pollution from humans, animal and domestic sources (land and agricultural run-off) are recognized as a major cause of deteriorating water quality along Australia's coastline. Management of water quality has primarily relied on the use of bacterial indicator methods. However the validity and source-specificity of these methods have been met with increasing reservations for several years now. A relatively recent methodology uses a different chemical biomarker approach using 'sterols', a group of compounds related to the common bio-membrane lipid cholesterol and its derivatives. Sterols c

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Pratt, Catherine. "Investigations into Faecal Sterols and E.Coli as Indicators of Sewage and Non-Sewage Inputs into a Subtropical Estuarine Embayment System in South Eastern QLD, Australia." Thesis, Griffith University, 2006. http://hdl.handle.net/10072/366621.

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Sewage pollution from humans, animal and domestic sources (land and agricultural run-off) are recognized as a major cause of deteriorating water quality along Australia's coastline. Management of water quality has primarily relied on the use of bacterial indicator methods. However the validity and source-specificity of these methods have been met with increasing reservations for several years now. A relatively recent methodology uses a different chemical biomarker approach using 'sterols', a group of compounds related to the common bio-membrane lipid cholesterol and its derivatives. Sterols c

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Johnson, Kaitlin Marie. "EVALUATION OF THE ESTROGENIC AND OSMOREGULATORY IMPACTS OF EXPOSURE TO 4-NONYLPHENOL POLLUTION IN THE ESTUARINE ARROW GOBY, CLEVELANDIA IOS." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1636.

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Recent evidence indicates that some of California’s coastal estuaries are contaminated with the chemical 4-nonylphenol (4-NP). Tissue burdens of 4-NP detected in the intertidal arrow goby (Clevelandia ios) in California are among the highest recorded worldwide, however, it remains unknown whether these fish are impacted by this 4-NP contamination. 4-NP is an established endocrine disrupting compound with estrogenic properties that can alter reproductive function. Furthermore, evidence that estrogens can modulate iono- and osmo-regulatory function in fishes implies that estuarine fishes exposed

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Chariton, Anthony A., and n/a. "Responses in estuarine macrobenthic invertebrate assemblages to trace metal contaminated sediments." University of Canberra. Resource, Environmental & Heritage Sciences, 2005. http://erl.canberra.edu.au./public/adt-AUC20060509.115744.

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Three approaches were employed to examine the effects of elevated sediment trace metal concentrations on estuarine/marine macrobenthic invertebrate assemblages. The initial study examined macroinvertebrate communities along a known polymetallic gradient, Lake Macquarie, NSW (gradient study). The second study experimentally tested if sediments sourced from different locations within Lake Macquarie differentially influenced the recolonisation of benthic invertebrates. The third study investigated the different recolonisation patterns of benthic invertebrates into sediments spiked with increasing

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Claus, Sonia Carmel, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Heavy metals in biota from temperate Australian estuaries." THESIS_CSTE_SFH_Claus_S.xml, 2003. http://handle.uws.edu.au:8081/1959.7/503.

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The detection of anthropogenic impacts in our estuaries has become a critical social, political and scientific concern in recent years. Work has focussed on the effects of these impacts on the spatial and temporal patterns of biotic assemblages and searched for bioindicators and biomarkers of pollutants that may act as early warning signs. The estuaries in temperate Southeastern Australia have a diversity of biotic assemblages living in the soft sediment. One of the most abundant macroinvertebrates is the little studies mussel, Xenostrobus securi that is found living with an assemblage of bent

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Pospelova, Vera. "Dinoflagellate cyst assemblages and environmental factors controlling their distribution in New England (USA) estuaries." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19559.

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Extensive data sets of water quality and sediment chemistry as well as detailed historical records were used to analyze environmental factors controlling dinoflagellate cyst distribution in shallow estuaries (lagoons and embayments) of southern New England. Cyst abundance, species richness, the proportion of cysts produced by heterotrophic and autotrophic dinoflagellates, and the composition of cyst assemblages reflect spatial and temporal variation in environmental conditions. The cyst record in sediment cores from two embayments, New Bedford Harbor and Apponagansett Bay, Massachusetts demons

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Dove, Michael Colin. "Effects of estuarine acidification on survival and growth of the Sydney rock oyster Saccostrea glomerata." Connect to this title online, 2003. http://www.library.unsw.edu.au/~thesis/adt-NUN/public/adt-NUN20050125.110005/index.html.

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Peters, Joseph Richard. "Pharmaceutical Contaminants as Stressors on Rocky Intertidal and Estuarine Organisms: a Case Study of Fluoxetine." PDXScholar, 2016. https://pdxscholar.library.pdx.edu/open_access_etds/2729.

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Contaminants such as pharmaceuticals are of increasing concern due to their ubiquitous use and persistence in surface waters worldwide. Limited attention has been paid to the effects of pharmaceuticals on marine life, despite widespread detection of these contaminants in the marine environment. Of the existing studies, the majority assess the negative effects of pharmaceuticals over an exposure period of 30 days or less and focus on cellular and subcellular biomarkers. Longer studies are required to determine if chronic contaminant exposure poses risks to marine life at environmentally relevan

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Claus, Sonia Carmel. "Heavy metals in biota from temperate Australian estuaries /." View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20051013.092820/index.html.

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Thesis (Ph.D.) -- University of Western Sydney, 2003.<br>"Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy at the University of Western Sydney Hawlesbury" Bibliography : leaves 245-278.

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Lee, Wen-Hsiung. "The effect of salinity on nutrient release from riverine and tributary estuarine sediments to the Chesapeake Bay under oxidizing and reducing conditions." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80053.

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The primary objective of this study was to determine the salinity effect on nutrient release and the denitrification rate in a sediment-water system. To accomplish this objective, bench-scale microcosm studies of York River sediments and Occoquan Reservoir sediments were conducted. Seawater and freshwater were mixed in various ratios to simulate seasonal, salinity-varying environments in the Chesapeake Bay and its tributary estuaries. Experiments were conducted under aerobic, anaerobic, and anoxic conditions. The results showed that high salinity can cause flocculation of particles and res

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Wyness, Adam James. "The influence of sediment characteristics on the abundance and distribution of E. coli in estuarine sediments." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/10158.

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Microbiological water quality monitoring of bathing waters does not account for faecal bacteria in sediments. Intertidal deposits are a significant reservoir of faecal bacteria and this indicates there is a risk to human health through direct contact with the sediment, or through the resuspension of bacteria to the water column. This project investigated factors influencing the relative abundance of faecal indicator organisms (FIOs) in intertidal estuarine sediments. The effects of physical, biogeochemical and biological sediment characteristics, environmental variables and native microbial co

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Astill, Helen Lee. "The role of benthic macroalgae in sediment-water nutrient cycling in the Swan-Canning estuarine system, Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2000. https://ro.ecu.edu.au/theses/1344.

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This study documented the macroalgal assemblages of the Swan-Canning Estuarine System (SCES) over a two year period, and the influences of several environmental parameters on the assemblages. In addition, the Impacts of unattached macroalgal accumulations on benthic nutrient fluxes and microbial communities were investigated. Benthic macroalgal assemblages and physico-chemical regimes were monitored in the SCES, to determine temporal and spatial changes in macroalgal communities and the influence of environmental factors in these changes. Physico-chemical regimes demonstrated strong seasonal c

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Gaulier, Camille. "Trace metals in estuarine and coastal waters : dynamics, speciation and bioavailability under various environmental conditions." Thesis, Lille 1, 2020. http://www.theses.fr/2020LIL1R013.

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Les écosystèmes estuariens et côtiers assurent de multiples services écologiques, sociaux et économiques. Ils constituent une source de nourriture, de revenus et sont au cœur du commerce et du transport maritime. Ils jouent donc un rôle clé dans notre monde moderne et leur préservation d'un point de vue environnemental est aujourd'hui crucial. Malgré tous les efforts réalisés en matière de gestion de l'environnement, la pollution associée au développement économique rapide du littoral et à une industrialisation intensive était finalement inévitable et demeure encore aujourd'hui l'une des princ

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Spasojević, Zorana. "Biogenic silica and diatom centricpennate ratios as indicators of historical coastal pollution." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29476.

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Historical environmental changes in two shallow, unstratified, estuaries in Buzzards Bay, Massachusetts are compared, using three diatom paleo-production indicators: sedimentary biogenic silica (BSi), BSi flux and ratio of Centric to Penate diatoms. Both estuaries were exposed to pollution. New Bedford Harbor (NBH) has a history of intensive nutrient loading and industrial pollution, while the control site, Apponagansett Bay, has lower levels of nutrient loading. Consideration of local precipitation history and diatom parameters suggests that salinity-driven changes in diatom production are ne

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Taylor, Anne, and n/a. "Zinc, copper and cadmium accumulation, detoxification and storage in the gastropod molluscs Austrocochlea constricta and Bembicium auratum and an assessment of their potential as biomonitors of trace metal pollution in estuarine environments." University of Canberra. Applied Science, 1998. http://erl.canberra.edu.au./public/adt-AUC20061109.124205.

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Zinc, copper and cadmium accumulation was measured in two herbivorous gastropod molluscs Austrocochlea constricta and Bembicium auratum from Lake Macquarie NSW an area with a history of trace metal pollution. The investigation consisted of three main parts. The first part examined the influence of organism mass and location within the Lake on whole body tissue metal concentrations. This part of the study also compared the distributions of tissue metal concentrations of populations from Lake Macquarie, a known polluted environment, with those of populations from Jervis Bay NSW, an unpolluted en

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Cunha, Paulo Eduardo Vieira. "Aplicação da metodologia para estimativa do fator de emissão - nutrientes e metais pesados - para avaliar a contribuição dos efluentes de carcinicultura no estuário do rio Potengi, Natal (RN)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-02062010-093706/.

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A criação de camarões marinhos em cativeiro tem sido acusada de causar sérios impactos ambientais, sobretudo em função do lançamento de grandes quantidades de nutrientes e metais pesados nas águas estuarinas. Diversos estudos realizados nos principais estados produtores de camarão no Brasil, através do uso de fatores de emissão, estimaram as cargas destes poluentes para seus principais estuários. Neles ficou caracterizada a importância desta atividade como fonte de nutrientes, uma vez que a carcinicultura dominou as emissões de nitrogênio para os estuários dos rios Açu (RN) e Jaguaribe (CE). O

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Morton, Michael Gerard 1957. "Comparison of Risk Assessment-Predicted Ecologically Safe Concentrations of Azinphos-Methyl and Fenvalerate to Observed Effects on Estuarine Organisms in a South Carolina Tidal Stream Receiving Agricultural Runoff." Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc277745/.

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A prospective ecological risk assessment method was developed evaluating the cumulative probabilistic impact of chemical stressors to aquatic organisms. This method was developed in response to the need to evaluate the magnitude, duration and episodic nature of chemical stressors on aquatic communities under environmental exposure scenarios. The method generates a probabilistic expression of the percent of an ecosystem's species at risk from a designated chemical exposure scenario.

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Juza, Holly Kay. "Water Quality Model for South Slough, Coos Bay, Oregon." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5046.

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The South Slough Estuary is located off Coos Bay along the southern coast of Oregon. It is divided into two channels that meet and continue to Coos Bay at the Charleston Harbor. There are six major contributing streams to South Slough. After rainfall events, the level of coliform bacteria in the slough increases because of stream bacteria loading. This is due to cattle grazing in the drainage areas, failed septic systems from private homes, and sewage sludge applied to the County landfill, which drains into the slough. The Oregon Health Division has enforced a Sanitation Management Plan for Co

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Orr, Kyla Kathleen. "Spatial and temporal variations in metals in the sediment and water of selected Eastern Cape Estuaries, South Africa." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005457.

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The spatio-temporal patterns in concentrations of selected metals within the sediment (Cd, Co, Cu, Fe, Pb, Ni and Zn) and water (Cd and Pb) of three permanently open estuaries (Kariega, Kowie, Great Fish) and six temporary open-closed estuaries (Mpekweni, East Kleinemonde, West Kleinemonde, Riet, Kasouga, Boknes) were investigated. The concentrations of metals were influenced by size composition and total organic content of the sediments. Enrichment factors (EFs), using Fe as a reference element, and baseline linear regression models for metals vs. Fe were calculated to assess the extent of me

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