Relevant bibliographies by topics / Freshwater systems / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Freshwater systems.

Dissertations / Theses on the topic 'Freshwater systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Freshwater systems.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Klein, Sascha. "Microplastics in Freshwater Systems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200861.

Full text
Abstract:
Synthetic polymers are one of the most significant pollutants in the aquatic environment, because of abilities such as buoyancy and extreme persistency. Serious effects are expected from so-called microplastics (particle size <5 mm) that are reported in rivers, lakes as well as the ocean and that accumulate in sediments worldwide. In this thesis the abundance of microplastics in river shore sediments in the Rhine-Main area of Germany was studied. Therefore, a new method was developed that is based on a sodium chloride density separation with subsequent destruction of natural debris, and ident
APA, Harvard, Vancouver, ISO, and other styles
2

Manolopoulos, Helen. "Metal sulfides in oxidizing freshwater systems /." *McMaster only, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Rodrigues, Mariana Oliveira. "Impacts of microplastics in freshwater systems." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/21469.

Full text
Abstract:
Mestrado em Toxicologia e Ecotoxicologia<br>Plastics, in particular microplastics (particles with dimensions < 5 mm), are a widespread and persistent pollutant constituting an emerging scientific and societal issue. Its characteristics allied to an inadequate management contributes to their accumulation in aquatic systems, reaching high densities. Moreover, they can also interact with environment affecting economy, human health and aesthetics. However, most of scientific studies have been focused in marine environment while scarce knowledge exists regarding freshwater systems, including in Por
APA, Harvard, Vancouver, ISO, and other styles
4

Palmer-Felgate, Elizabeth Jane. "Biogeochemical controls on phosphorus dynamics in freshwater systems." Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536096.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Peters, Michael Steven. "Temporal impacts of volcanic ash in freshwater systems." Thesis, University of Canterbury. Geological Sciences, 2012. http://hdl.handle.net/10092/7639.

Full text
Abstract:
Volcanic ash can cause acidification and metal contamination of freshwater systems. Shmt-te1m chemical and pH fluxes in water have been attributed to dissolution of the ash surface film while dissolution of the glassy matrix has been linked to metal input over longer time periods. The rate at which ash surface film and glassy matrix dissolution occurs and the associated impact of ash to freshwater pH and chemistry over time has not previously been established. The influence of volcanic ash BET surface area on initial pH fluxes and metal dissolution rates in freshwater systems was investigated
APA, Harvard, Vancouver, ISO, and other styles
6

Sanchez, Montelongo Jessica Lynn. "The Adaptive Evolution of Herbivory in Freshwater Systems." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3813.

Full text
Abstract:
Herbivory is thought to be nutritionally inefficient relative to carnivory and omnivory. But, herbivory evolved from carnivory in many lineages, suggesting that there are advantages to eating plants. To understand the adaptive significance of the transition from carnivory to herbivory, I proposed five hypotheses for the adaptive evolution of herbivory and reviewed the current freshwater literature to identify conditions where eating plants might be adaptive over eating animals. I tested three of these ideas (Suboptimal Habitat, Heterotroph Facilitation, and Lipid Allocation) using the herbivor
APA, Harvard, Vancouver, ISO, and other styles
7

She, Nian. "Chaos in aquatic systems /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/6370.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wagner, Sasha. "Black Carbon: Sources, Mobility and Fate in Freshwater Systems." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2213.

Full text
Abstract:
Black carbon (BC) is a complex mixture of polycondensed aromatic compounds produced by the incomplete combustion of biomass during events such as wildfires and the burning of fossil fuels. Black carbon was initially considered to be a refractory form of organic matter. However, recent studies have shown that BC can be quite mobile and reactive in the terrestrial environment. Black carbon can be translocated from soils and sediments in the form of dissolved BC (DBC). A global correlation between DBC and bulk dissolved organic carbon (DOC) has been established for fluvial systems where DBC compr
APA, Harvard, Vancouver, ISO, and other styles
9

Martin, Grant Douglas. "Drivers of macrophyte assemblages in South African freshwater systems." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1004127.

Full text
Abstract:
Potentially damaging submerged invasive freshwater macrophytes have been identified in South African freshwater systems, but have received less attention than their floating counterparts. To ascertain the changes and effects that these species may have on macrophyte ecology, an understanding of the drivers of macrophyte assemblages is essential. The aims of this thesis were to investigate select abiotic and biotic factors driving introduction, establishment and spread of submerged macrophytes in South Africa. Surveys on the status of submerged plant species in South Africa were conducted to fi
APA, Harvard, Vancouver, ISO, and other styles
10

Knights, Deon Hanley. "The Fate of Nutrients in Two Coastal Freshwater Systems." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu159494472722077.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Pattinson, Sarah N. "Denitrification within riverine systems of north-east England." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4558/.

Full text
Abstract:
This study was undertaken to investigate denitrification and nitrous oxide production in sediments and the key environmental factors influencing these within selected river systems of the LOIS (Land-Ocean Interaction Study) area in North-East England and southern Scotland. Seasonal and spatial trends were evident in both environmental and denitrification data measured monthly for 1.5 years along the Swale-Ouse system from source to tidal limits. Denitrification, measured in sediment cores using acetylene inhibition and expressed by unit area of sediment, increased with distance from source dow
APA, Harvard, Vancouver, ISO, and other styles
12

Amin, M. K. A. "The ecology and genetics of Pseudomonas bacteriophage in freshwater systems." Thesis, Cardiff University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381224.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Wu, Dayong. "Bioassessing lotic systems using benthic insect communities in southeast Wyoming." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1296087911&sid=2&Fmt=2&clientId=18949&RQT=309&VName=PQD.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Steinsen, Ragnar. "Form Processing Program for the Institute of Freshwater Fisheries in Iceland." Thesis, University of Skövde, Department of Computer Science, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-231.

Full text
Abstract:
<p>Instituten för Färskvatten Fiske på Island administrerar och styr fiske i över 80 av Islands floder. Detta görs genom att för varje fisk som fångas registreras fiskens längd, tyngd, kön plus några andra attribut i en bok, som kallas för “fiskebok”. Dessa böcker skickas sedan till Institutet varje år där informationen ur böckerna manuellt registreras i en databas. Den manuella inmatningen är mycket tidskrävande och dyr för Instituten. Önskemål finns om automatisering av denna process. Lösningen som föreslås här är att skanna in fiskeböckerna, översätta den inskannade bilden till datorhanterb
APA, Harvard, Vancouver, ISO, and other styles
15

Kazanjian, Garabet. "Primary production in shallow freshwater systems amid a rapidly changing world." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20561.

Full text
Abstract:
Kleine, flache Gewässer gelten als sogenannte „hotspots“ der Primärproduktion und Kohlenstoffbindung. Diese Doktorarbeit zielt darauf ab, die Primärproduktion verschiedener kleiner Gewässer zu quantifizieren sowie die Mechanismen, die den Kohlenstoffkreislauf dieser Systeme beeinflussen, zu analysieren. Der Fokus liegt dabei auf dem Einfluss globaler Veränderungen, die diese Mechanismen verändern können Im ersten Abschnitt wurde die Primärproduktion (PP) in kleinen, temporären Söllen untersucht, die sehr anfällig für Störungen sind. Ich konnte zeigen, dass die PP der Sölle im Sommer außergewö
APA, Harvard, Vancouver, ISO, and other styles
16

NAVA, VERONICA. "Microplastics in freshwater systems: characterization, quantification and interaction with aquatic organisms." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/363436.

Full text
Abstract:
Gli ecosistemi acquatici risentono di differenti impatti antropici. Tra questi, la presenza di plastiche e microplastiche rappresenta una problematica ambientale diffusa. La maggior parte delle ricerche svolte fino ad ora si è concentrata specialmente sull’ambiente marino e le informazioni riguardanti la presenza e gli effetti di questi contaminanti nei sistemi di acqua dolce sono limitate. Inoltre, non esiste ancora nella comunità scientifica un’armonizzazione delle procedure di campionamento e dei protocolli analitici per la caratterizzazione e quantificazione delle plastiche in ambiente acq
APA, Harvard, Vancouver, ISO, and other styles
17

Chakona, Albert. "Comparative biogeography and ecology of freshwater fishes in the Breede and associated river systems, South Africa." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1015694.

Full text
Abstract:
Distribution patterns and levels of genetic diversity in extant taxa are a product of complex palaeogeographic processes and climatic oscillations as well as the species’ intrinsic ecological adaptations. The Cape Floristic Region of South Africa presents a unique system for studying the processes that promote species diversification and distribution patterns. This region has a high degree of endemism of both terrestrial and aquatic biota and is clearly isolated from neighbouring areas by the Cape Fold Mountains and the Great Escarpment. The objective of this study was to firstly examine the e
APA, Harvard, Vancouver, ISO, and other styles
18

Witton, K. E. "The degradation of a synthetic 2-stroke lubricating oil in freshwater systems." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383093.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Baudoin, Lucie Madeleine. "Testing the waters: dealing with freshwater systems in organization and management studies." Doctoral thesis, Universitat Ramon Llull, 2020. http://hdl.handle.net/10803/669985.

Full text
Abstract:
Els sistemes d’aigua dolça, com ara rius, llacs o zones humides, proporcionen una infinitat de béns i serveis ecosistèmics a les societats humanes. Tot i això, la gestió d’aquests sistemes és complexa, interorganitzativa i sovint insostenible des d’una perspectiva ecològica. La investigació en estudis d’organització i gestió, tot i que pot ser fructífera, no pot contribuir a resoldre aquest problema, si no inclou aspectes conceptualment ecològics dels sistemes d’aigua dolça o no té una perspectiva del sistema. Aquestes recomanacions conceptuals i metodològiques són més fàcils a dir que a fer.
APA, Harvard, Vancouver, ISO, and other styles
20

Conway, Carol Leza, and n/a. "Oxic and anoxic transformations of leaf derived organic matter in freshwater systems." University of Canberra. Resource, Environmental & Heritage Sciences, 2005. http://erl.canberra.edu.au./public/adt-AUC20060519.105559.

Full text
Abstract:
In Australia, significant effort goes into reducing the amount of nitrogen and phosphorus entering inland waters from point sources. However, little is known of the extent to which riparian organic matter may act as a source of these nutrients. Also, whilst the relationships between the nitrogen, phosphorus and carbon cycles are broadly known, there is little quantitative data regarding the release of these elements from Australian riparian organic matter and their subsequent microbial mineralisation within aquatic environments. In particular, comparatively little is known of their comparative
APA, Harvard, Vancouver, ISO, and other styles
21

Droppo, Ian Gerald. "Characteristics of suspended and bottom sediment in natural and engineered freshwater systems." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302556.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Motitsoe, Samuel Nkopane. "Mapping Nitrogen Loading in Freshwater Systems: Using Aquatic Biota to Trace Nutrients." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/d1020819.

Full text
Abstract:
The majority of river systems in developing countries like South Africa, are found in catchments areas that are densely human populated, therefore are subjected to intense land-use and developmental pressures. Anthropogenic nutrient pollution or the excessive addition of nutrients is one important type of stressors that river systems often experience through intense land-use, which includes poor waste management and agricultural practices. Such events are referred to as the “urban syndrome”, were human populations and developmental demands outpace ecosystem services. Traditional measurements o
APA, Harvard, Vancouver, ISO, and other styles
23

Yamane, Hideyuki. "Reproductive strategies and interspecific interactions in nest-association systems of freshwater fishes." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142416.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

AMALFITANO, STEFANO. "Structure and function of benthic microbial community in highly variable freshwater systems." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/576.

Full text
Abstract:
In the semi-arid Mediterranean regions, extended reaches of rivers and streams show a recurrent dry phases of varying duration and spatial extent. It is important to study the effects of water stress on riverine ecological processes since freshwater systems are crucial in linking terrestrial and marine environments, My Doctorate thesis research, supported by the European TempQsim project (EVK1-CT2002-00112), was aimed to investigate the dynamics of microbial communities associated to sediments in temporary rivers. In particular, I have been investigating the effects of water stress on the stru
APA, Harvard, Vancouver, ISO, and other styles
25

Ferronato, Chiara <1984&gt. "Water, sediment and soil physicochemical interactions in freshwater, brackish and saline systems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6881/1/Ferronato_PHD.pdf.

Full text
Abstract:
The physicochemical interactions between water, sediment and soil deeply influence the formation and development of the ecosystem. In this research, different freshwater, brackish and saline subaqueous environments of Northern Italy were chosen as study area to investigate the physicochemical processes which occur at the interface between water and sediments, as well as the effects of soil submergence on ecosystem development. In the freshwater system of the Reno river basin, the main purpose was to define the heavy metals hazard in water and sediments of natural and artificial water courses
APA, Harvard, Vancouver, ISO, and other styles
26

Ferronato, Chiara <1984&gt. "Water, sediment and soil physicochemical interactions in freshwater, brackish and saline systems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6881/.

Full text
Abstract:
The physicochemical interactions between water, sediment and soil deeply influence the formation and development of the ecosystem. In this research, different freshwater, brackish and saline subaqueous environments of Northern Italy were chosen as study area to investigate the physicochemical processes which occur at the interface between water and sediments, as well as the effects of soil submergence on ecosystem development. In the freshwater system of the Reno river basin, the main purpose was to define the heavy metals hazard in water and sediments of natural and artificial water courses
APA, Harvard, Vancouver, ISO, and other styles
27

Decker, Emilia. "Ecoacoustics as a sustainable tool to characterize, investigate and monitor freshwater streams." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/405193.

Full text
Abstract:
Freshwater systems are dramatically transformed by human activities and are in need of effective monitoring to halt the decline of ecosystem health. Ecoacoustics presents a new cost effective way to monitor changes in ecosystems by investigating sounds and their relationships with the environment. However, while ecoacoustics has been explored as a monitoring tool in terrestrial and marine realms, it only gained traction in recent years in freshwater systems. In this thesis, I investigate ecoacoustics as a monitoring tool for freshwater systems. By investigating spatial-temporal variation in so
APA, Harvard, Vancouver, ISO, and other styles
28

Storer, Timothy. "Ethology and production of freshwater crayfish in aquatic polysystems in Western Australia." Thesis, Curtin University, 2005. http://hdl.handle.net/20.500.11937/2442.

Full text
Abstract:
Aquatic polyculture has been recognised as a potential way of increasing the costeffectiveness of farming marron (Cherax tenuimanus), as it can lower average costs of production, increase system yields, and reduce economic risks associated with monoculture operations. Polyculture also increases ecological stability and assists recycling processes, which can result in synergistic benefits to participating species. In aquaculture, this synergism can result in increased profitability through advanced growth rates and/or reduced feed input. However, many of the inherent advantages of aquatic polyc
APA, Harvard, Vancouver, ISO, and other styles
29

Harford, Andrew James, and andrew harford@rmit edu au. "The characterisation of Australian freshwater fish immune systems and their response to immunomodulators." RMIT University. School of Medical Science, 2005. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20060307.171411.

Full text
Abstract:
The Murray-Darling basin is the largest river system in Australia with significant economic, social, recreational and cultural value. It supplies water for drinking and agriculture to a large inland area of the eastern and southern states of Australia. It is also the ultimate sink for many environmental contaminants that result from human activities within the catchment. Aquatic organisms live intimately with their environment and may be continuously exposed to these contaminants through the water column or the food chain. Some chemicals are bioaccumulated and biomagnified in tissue
APA, Harvard, Vancouver, ISO, and other styles
30

Yates, Christopher Alan. "Characterising dissolved organic matter flux in UK freshwater systems : sources, transport and delivery." Thesis, University of Reading, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.631698.

Full text
Abstract:
Dissolved organic matter (DOM) is a significant component of carbon (C), nitrogen (N) and phosphorus (P) flux from source to sea. This thesis presents the results of an investigation into the seasonal and spatial variability of DOM character, and flux of DOM relative to inorganic N and P, in two contrasting lowland UK catchments: the chalk-dominated River Wylye and peat-dominated Millersford Brook. Each catchment was sampled weekly at a total of 14 sampling locations, with daily sampling at three sites in each catchment. Dissolved organic carbon (DOC), all N species, P fractions, and both chro
APA, Harvard, Vancouver, ISO, and other styles
31

Filizadeh, Yousef. "The management ecology of aquatic weeds which cause problems in Iranian freshwater systems." Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318119.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Cabello, Yeves Pedro José. "Novel microbial lineages from freshwater systems revealed by genomics and genome-resolved metagenomics." Doctoral thesis, Universidad de Alicante, 2018. http://hdl.handle.net/10045/87431.

Full text
Abstract:
Few genomic and metagenomic studies have focused on freshwater systems in the last years. Most of the studies carried out on these particular environments so far rely on microscopy, physiology, phenotypic observations, individual genes and 16S rRNA sequencing. Here, we shed light on microbial communities from oligotrophic and mesotrophic freshwater systems using high-throughput deep sequencing metagenomics and genome-resolved metagenomics. We have focused on the study of ubiquitous and cosmopolitan microbial groups from two temperate Spanish reservoirs (Tous, Amadorio). Among these, we studied
APA, Harvard, Vancouver, ISO, and other styles
33

Wilkes, Austin. "Phosphorus Mobility and Speciation Under Dynamic Redox Conditions in Shallow Eutrophic Freshwater Systems." ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1145.

Full text
Abstract:
Internal loading of phosphorus (P) from lake sediments can delay the recovery of lakes from eutrophication for years to decades following decreases in external nutrient inputs. While internal P loading is a pervasive problem in freshwater systems, molecular speciation of P in benthic sediments of these systems remains poorly characterized. As different P species will exhibit different responses to changing sediment-water interface (SWI) geochemistry, quantifying P speciation in sediments is a critical step in understanding P dynamics in sediment-water systems. Here, various synchrotron-based t
APA, Harvard, Vancouver, ISO, and other styles
34

Scott, Lucy Elizabeth Powell. "The development of a geographic information systems based atlas of southern African freshwater fish, and its application to biogeographic analysis." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1005099.

Full text
Abstract:
A Geographic Information Systems (GIS) atlas of southern African freshwater fish was developed for the SADC countries from natural history collection specimens, hydrological, topographical and climatological data. The primary purpose of the development of the atlas of freshwater fish was the construction of a practical framework to transform vast amounts of existing biological data for use in research and management of aquatic resources. The database of freshwater fish collection specimens that was incorporated into the atlas, was developed in association with ALCOM (Aquatic Resources Manageme
APA, Harvard, Vancouver, ISO, and other styles
35

Thrush, Mariah A. "Analyzing Algal Diversity in Aquatic Systems Using Next Generation Sequencing." Ohio University Honors Tutorial College / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors1366807717.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Storer, Timothy. "Ethology and production of freshwater crayfish in aquatic polysystems in Western Australia." Curtin University of Technology, Department of Applied Biosciences, 2005. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=16749.

Full text
Abstract:
Aquatic polyculture has been recognised as a potential way of increasing the costeffectiveness of farming marron (Cherax tenuimanus), as it can lower average costs of production, increase system yields, and reduce economic risks associated with monoculture operations. Polyculture also increases ecological stability and assists recycling processes, which can result in synergistic benefits to participating species. In aquaculture, this synergism can result in increased profitability through advanced growth rates and/or reduced feed input. However, many of the inherent advantages of aquatic polyc
APA, Harvard, Vancouver, ISO, and other styles
37

Jones, Susan Elizabeth. "Extracellular enzyme activity in aquatic systems with particular emphasis on attached freshwater microbial communities." Thesis, Bangor University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278143.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Holding, Kathleen Louise Marie. "Epithilic periphyton as a potential biomonitor of trace metals contamination in freshwater aquatic systems." Thesis, University of Derby, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416563.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Albanese, Katie. "Photochemistry and Toxicity of Triclosan, Triclocarban, and their Photoproducts and Mixtures in Freshwater Systems." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1468967416.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Berggren, Martin. "Bacterial use of allochthonous organic carbon for respiration and growth in boreal freshwater systems." Doctoral thesis, Umeå : Department of Ecology and Environmental Science, Umeå University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-30051.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Clarke, Neil. "Seasonal effects of treated sewage effluents upon the reproduction and development of European freshwater molluscs." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/4458.

Full text
Abstract:
The most widespread evidence of environmental endocrine disruption in aquatic wildlife is from the feminising effects of oestrogenic endocrine disrupting compounds. However, very little is known of the effects of these chemicals (and others) upon freshwater molluscs found in our river and lakes. This thesis aimed at evaluating the effects of treated sewage effluent upon the reproductive and developmental cycle of a range of commonly found European freshwater gastropod molluscs. Initial mesocosm experiments were undertaken to test a range of mollusc species for their the suitability to the expe
APA, Harvard, Vancouver, ISO, and other styles
42

Joyner, Jennifer Jendro Alperin Marc J. "Molecular identity and nutrient limitation of Lyngbya wollei mat communities in north Florida freshwater systems." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1121.

Full text
Abstract:
Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.<br>Title from electronic title page (viewed Mar. 27, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Marine Sciences." Discipline: Marine Sciences; Department/School: Marine Sciences.
APA, Harvard, Vancouver, ISO, and other styles
43

Eaton, Philip. "The biochemical ecology of freshwater modular systems : the role of amino acids and humic substances." Thesis, University of Sussex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295954.

Full text
Abstract:
1. Free amino acid (faa) and humic substance (HS) concentrations were measured seasonally using high performance liquid chromatography (HPLC) in two contrasting freshwater ecosystems. FAA concentrations were generally higher in the eutrophic Lewes Brooks than in the oligotrophic Isle of Thorns lake, whereas the converse was the case with HS concentration. 2 Faa and HS accumulation patterns were measured in media conditioned by Ceratophyllum demersum alone, Biompha/aria g/abrata alone, and media conditioned by the snail and plant together. It was hypothesised that nutrient exchange may benefit
APA, Harvard, Vancouver, ISO, and other styles
44

Enwright, Nicholas. "Using Geographic Information Systems for the Functional Assessment of Texas Coastal Prairie Freshwater Wetlands Around Galveston Bay." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28416/.

Full text
Abstract:
The objective of this study was to deploy a conceptual framework developed by M. Forbes using a geographic information system (GIS) approach to assess the functionality of wetlands in the Galveston Bay Area of Texas. This study utilized geospatial datasets which included National Wetland Inventory maps (NWI), LiDAR data, National Agriculture Imagery Program (NAIP) imagery and USGS National Land Cover data to assess the capacity of wetlands to store surface water and remove pollutants, including nitrogen, phosphorus, heavy metals, and organic compounds. The use of LiDAR to characterize the hydr
APA, Harvard, Vancouver, ISO, and other styles
45

Mpherwane, Salome Kedibone. "An investigation into the allozyme genetic variation patterns among populations of freshwater fish from different river systems of Southern Africa." Thesis, University of Limpopo (Turfloop Campus), 2011. http://hdl.handle.net/10386/910.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Caulkett, Andrew Paul. "Studies of dissolved species and suspended particulate matter in the freshwater systems of Signy Island, maritime Antarctic." Thesis, Open University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311860.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Stoyanovich, Sawyer. "The Fate and Behaviour of Diluted Bitumen and Its Chemical Constituents In Freshwater Systems Following Simulated Spills." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42576.

Full text
Abstract:
As conventional oil reserves deplete and more efficient refining technologies emerge, the use and transportation of heavy fuel oils such as dilbit is rising. Despite the risk of accidental dilbit spills, the fate and behaviour in aquatic systems is largely unknown. The objective of this thesis was to develop new approaches and insights to directly address knowledge gaps surrounding the fate and behaviour of diluted bitumen (dilbit) in freshwater systems. During the summers of 2017 and 2018, a large-scale collaborative field study was conducted at the International Institute for sustainable D
APA, Harvard, Vancouver, ISO, and other styles
48

West, Rae Ann. "Trialling small-scale passive systems for treatment of acidmine drainage: A case study from Bellvue Mine, WestCoast, New Zealand." Thesis, University of Canterbury. School of Geological Sciences, 2014. http://hdl.handle.net/10092/10907.

Full text
Abstract:
Bellvue Mine is an abandoned coal mine on the West Coast of the South Island which discharges severe acid mine drainage (AMD) into the nearby Cannel Creek. This site is unique in that iron is in a ferrous or reduced form at the mouth of the mine, but due to the slope of the site, the AMD becomes aerated and subsequently the iron oxidises into ferric form as it moves downstream. Research was conducted to examine the geochemistry of the AMD at the site and investigate the performance of selected passive treatment systems at this site, with a view to informing decisions for passive treatment at o
APA, Harvard, Vancouver, ISO, and other styles
49

Stewart-Koster, Ben Donald. "Modelling Multiscale Relationships in Riverine Landscapes: Putting the "Riverscape" into Statistical Models for River Ecology and Management." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/367114.

Full text
Abstract:
Many questions in ecology involve exploring the environmental processes that influence species’ distributions and abundances in both space and time. Such environmental processes are rarely independent, and generally operate across many scales. This is particularly relevant to riverine systems, where the nested hierarchical structure of the riverscape means fine-scale processes are strongly influenced by processes operating across larger scales. Recent research has identified some key advantages in applying Bayesian hierarchical models to hierarchical ecological problems such as identifying rel
APA, Harvard, Vancouver, ISO, and other styles
50

Bergström, Ulf. "Spatial heterogeneity and biotic interactions : scaling from experiments to natural systems." Doctoral thesis, Umeå University, Ecology and Environmental Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-249.

Full text
Abstract:
<p>Much of current ecological theory stems from experimental studies. These studies have often been conducted in closed systems, at spatial scales that are much smaller than the systems of interest. It is known that the outcome of these experiments may be seriously affected by artefacts associated with the caging procedures, as well as by the actual difference in spatial scale between experimental and target system. Yet, quantitative methods for estimating and removing artefacts of enclosure and for extrapolating experimental results to the scales of natural systems are largely lacking.</p><p>
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Freshwater systems' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography