Dissertations / Theses on the topic 'Estuarine and freshwater ecology'
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Akoto, William. "Valuing preferences for freshwater inflows into selected Western and Southern Cape estuaries." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/915.
Full textChege, Jedidah. "Valuing preferences for freshwater inflows into five Eastern Cape and Kwazulu-Natal estuaries." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/932.
Full textSnow, Gavin Charles. "Contributions to the use of microalgae in estuarine freshwater reserve determinations." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/709.
Full textNorris, Alicia Jean DeVries Dennis R. Wright Russell A. "Estuaries as habitat for a freshwater species ecology of largemouth bass (Micropterus salmoides) along a salinity gradient /." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2006%20Fall/Theses/NORRIS_ALICIA_59.pdf.
Full textWildsmith, Michelle Deanne. "Relationships between benthic macroinvertebrate assemblages and habitat types in nearshore marine and estuarine waters along the lower west coast of Australia /." Access via Murdoch University Digital Theses Project, 2007. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20081029.93910.
Full textVan, der Westhuizen Henri. "Valuing preferences for freshwater inflows into the Bira, Bushmans, Kasouga, Keiskamma, Kleinemond East, Nahoon and Tyolomnqa estuaries." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/628.
Full textSale, Michael Charles. "The value of freshwater inflows into the Kowie, Kromme and Nahoon Estuaries." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/599.
Full textJud, Zachary R. "Anthropogenic Disturbances in Estuarine Ecosystems: The Effects of Altered Freshwater Inflow, Introduction of Invasive Species, and Habitat Alteration in the Loxahatchee River, FL." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1197.
Full textGrange, Neil. "The influence of contrasting freshwater inflows on the feeding ecology and food resources of zooplankton in two eastern Cape estuaries, South Africa." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1005400.
Full textRuhl, Nathan A. "The Lotic-Lentic Gradient in Reservoirs and Estuaries." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1339177201.
Full textLuria, Catherine. "Factors influencing the abundance, community composition and activity states of bacterioplankton from the tidal freshwater James River." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/110.
Full textJennings, Michael Evan. "Nutrient dynamics in and offshore of two permanently open South African estuaries with contrasting fresh water inflow." Thesis, Rhodes University, 2006. http://hdl.handle.net/10962/d1005421.
Full textChilds, Amber-Robyn. "Movement patterns of spotted grunter, Pomadasys commersonnii (Haemulidae), in a highly turbid South African estuary." Thesis, Rhodes University, 2006. http://hdl.handle.net/10962/d1005149.
Full textWinget, Danielle Marie. "The ecology and diversity of estuarine virioplankton." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 303 p, 2008. http://proquest.umi.com/pqdweb?did=1617912801&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Full textMoore, Stephanie Kay School of Biological Earth & Environmental Sciences UNSW. "Tracers and indicators of estuarine nutrients." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Sciences, 2005. http://handle.unsw.edu.au/1959.4/21993.
Full textClegg, Mark Robert. "Behavioural ecology of freshwater phytoplanktonic flagellates." Thesis, Lancaster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403729.
Full textWood, Tamara Michelle. "Numerical modeling of estuarine geochemistry /." Full text open access at:, 1993. http://content.ohsu.edu/u?/etd,240.
Full textHelton, Rebekah R. "Ecology of benthic viruses in marine and estuarine environments." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 214 p, 2007. http://proquest.umi.com/pqdweb?did=1362525081&sid=14&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Full textFruchter, Jesse. "DO LARGE, INFREQUENT DISTURBANCES RELEASE ESTUARINE WETLANDS FROM COASTAL SQUEEZING?" OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/923.
Full textÖsterling, Martin. "Ecology of freshwater mussels in disturbed environments." Doctoral thesis, Karlstad University, Faculty of Social and Life Sciences, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-734.
Full textThe number of species extinctions is increasing at an alarming rate. Long-lived freshwater mussels of the order Unionoida, which include a parasitic stage on a host fish, are highly threatened. Habitat degradation by turbidity and sedimentation is thought to be one major reason for their decline. The objective of this thesis was to examine recruitment patterns and identify the causes of the lack of recruitment in the threatened unionoid freshwater pearl mussel (Margaritifera margaritifera). In addition, I investigated the effects of turbidity on non-endangered dreissenid mussels, where turbidity was manipulated through use of bioturbating mayflies.
In a survey of 107 Swedish streams, mussel population size and trout density were both positively correlated to recruitment probability of M. margaritifera. A more in-depth study of the age-structure of nine populations revealed that four of these populations showed no signs of recruitment over the last ten years. Within-stream variation in recruitment was high as both mussels and trout had patchy distribution, and may be important for population regulation. Moreover, examination of different life stages revealed no differences in the gravid mussel stage or the stage when mussels infect salmonid fish. Instead, differences were observed for the juvenile, benthic stage, presumably related to differences in turbidity and sedimentation. High turbidity may affect filter-feeding efficiency of mussels and high sedimentation may reduce survival by clogging sediments, thereby altering, for example, oxygen and food conditions. In the study of the effects of turbidity, bioturbating mayflies increased turbidity and filter-feeding dreissenid mussels reduced turbidity. Mussel growth both decreased and increased with increasing turbidity, depending on sediment type.
Turbidity and sedimentation often impact entire stream systems, and a holistic, catchment-based management strategy may be needed to reduce the effects of sedimentation on freshwater pearl mussels. The effects of restoration take a long time and must start soon if recruitment of mussels is to be re-established. Restoration may also be more urgent in some streams than in others, as the maximum age of M. margaritifera populations in my study differed by as much as 60 years. As mussel and trout densities seem to be important for recruitment success, one conservation method may be to concentrate mussels into sites where trout density is high.
Chadderton, W. L. "The ecology of Stewart Island freshwater communities." Thesis, University of Canterbury. Zoology, 1990. http://hdl.handle.net/10092/6568.
Full textSivichai, Somsak. "Tropical freshwater fungi : their taxonomy and ecology." Thesis, University of Portsmouth, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302240.
Full textJamal, Al-Lail S. S. "Ecophysiological studies on freshwater gammarid crustaceans." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373334.
Full textThatcher, Lisa A. "Carbon remineralization and storage in estuarine wetland sediments /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/thatcherl/lisathatcher.pdf.
Full textRoznere, Ieva. "Health assessment of freshwater mussels using metabolomics." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461065547.
Full textChilds, Amber-Robyn. "Movement patterns of spotted grunter, Pomadasys commersonnii (Haemulidae), in a highly turbid South African estuary." Connect to this title online, 2005. http://eprints.ru.ac.za/311/.
Full textFritz, Alyce T. "Trophodynamics of estuarine (salt marsh) heterotrophic nanoplankton (microbial ecology, salt marsh ecology, choanoflagellates, Virginia)." W&M ScholarWorks, 1986. https://scholarworks.wm.edu/etd/1539616651.
Full textJelbart, Jane E., University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "The influence of seascape spatial features on the fish and macroinvertebrates in seagrass beds." THESIS_CSTE_EAG_Jelbert_J.xml, 2004. http://handle.uws.edu.au:8081/1959.7/492.
Full textDoctor of Philosophy (PhD)
Sanderson, Rory J. "Ecology of freshwater plankton in contrasting hydraulic environments." Thesis, University of Leicester, 1998. http://hdl.handle.net/2381/29785.
Full textArshad, Aziz. "Temporal and spatial responses of benthic communities and populations across upper estuarine environmental gradients." Thesis, University of Plymouth, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284365.
Full textZhu, Bin. "Direct and indirect ecological effects of Dreissenid mussels (the zebra mussel Dreissena polymorpha and the quagga mussel D. bugensis) on submerged macrophytes in North American lakes." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.
Full textHuddleston, Amara Lynn. "The Influence of Ice Cover on the Coupling between Lake Erie Larval Walleye and their Prey." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532082401065932.
Full textMazik, 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.
Full textEverett, Jason D. School of Biological Earth & Environmental Science UNSW. "Biogeochemical dynamics of an intermittently open estuary: a field and modelling study." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Science, 2007. http://handle.unsw.edu.au/1959.4/30555.
Full textBatten, Sonia Dawn. "Correlative studies of the ecophysiology and community structure of benthic macrofauna." Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241219.
Full textLee, Jacqueline S. "The distribution and ecology of the freshwater molluscs of northern British Columbia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0033/MQ62481.pdf.
Full textDeVaul, Sarah Bess. "Mixotrophy in Freshwater Foodwebs." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/380959.
Full textPh.D.
Environmental heterogeneity in both space and time has significant repercussions for community structure and ecosystem processes. Dimictic lakes provide examples of vertically structured ecosystems that oscillate between stable and mixed thermal layers on a seasonal basis. Vertical patterns in abiotic conditions vary during both states, but with differing degrees of variation. For example, during summer thermal stratification there is high spatial heterogeneity in temperature, nutrients, dissolved oxygen and photosynthetically active radiation. The breakdown of stratification and subsequent mixing of the water column in fall greatly reduces the stability of the water column to a vertical gradient in light. Nutrients and biomass that were otherwise constrained to the depths are also suspended, leading to a boom in productivity. Freshwater lakes are teeming with microbial diversity that responds to the dynamic environment in a seemingly predictable manner. Although such patterns have been well studied for nanoplanktonic phototrophic and heterotrophic populations, less work has been done to integrate the influence of mixotrophic nutrition to the protistan assemblage. Phagotrophy by phytoplankton increases the complexity of nutrient and energy flow due to their dual functioning as producers and consumers. The role of mixotrophs in freshwater planktonic communities also varies depending on the relative balance between taxon-specific utilization of carbon and energy sources that ranges widely between phototrophy and heterotrophy. Therefore, the role of mixotrophy in the microbial food web is difficult to predict because functional types of mixotrophs along a gradient of nutritional strategies contribute differently to nutrient cycling and carbon sequestration. The overall objective of this work was to advance existing knowledge of the abundance and activity of phagotrophy phytoplankton in lacustrine systems. The incorporation of mixotrophy into the microbial food web requires the complement of physiological studies in culture (as described in chapter 2) and quantification of activity (including abundance and bacterivory) in relation to strict phototrophs and heterotrophs in situ (as described in chapter 3 and 4). Information on the physiological ecology of mixotrophic protists is crucial to understanding their role in planktonic food webs and influence on the dynamic microbial community structure in lake ecosystems. An understanding of the ecological functioning of lakes has ultimate consequences for management of water resources, particularly in the face of global climate change.
Temple University--Theses
Barretto, de Menezes Alexandre. "Molecular ecology of cellulose-degrading microorganisms in freshwater lakes." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511074.
Full textCai, Ji. "Ecology and diversity of freshwater picocyanobacteria in Japanese lakes." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263502.
Full textGilmour, Fiona Louise. "The effect of salinity and ammonia on nitirifier function and distribution in estuarine sediments." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=59375.
Full textStrydom, Nadine Amelia. "Dynamics of early stage fishes associated with selected warm temperate estuaries in South Africa." Thesis, Connect to this title online, 2002. http://eprints.ru.ac.za/25/.
Full textQin, Peibing. "Effects of light, nutrients and Dreissena (Dreissena polymorpha and Dreissena bugensis) on benthic ecosystems in lakes." Related electronic resource:, 2007. http://proquest.umi.com/pqdweb?did=1407689711&sid=1&Fmt=2&clientId=3739&RQT=309&VName=PQD.
Full textLindsey, Jacqueline Kimberly. "Estuarine habitat use by the California sea otter (Enhydra lutris nereis)." Thesis, San Jose State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10255129.
Full textAs the southern sea otter (Enhydra lutris nereis) range expands into northern and southern California, it will encounter estuaries that have been historically occupied by sea otters. Understanding how otters use re-colonized estuarine environments will inform how estuaries might be managed to encourage future sea otter range expansion. This project addressed the question: how do southern sea otters use space in the unique estuarine habitats of Elkhorn Slough? I compared the locations and behaviors of 25 individual sea otters of different status (male, female, and female with pup) among eelgrass, saltmud, saltmarsh, tidal creek, and main channel habitats in Elkhorn Slough. From these data I created a synoptic model to predict space use for resident otters of Elkhorn Slough based on sex, behavior, home range, and habitat distribution. Ninety percent home ranges calculated from the model indicated that females used larger home ranges than males in the slough, but both sexes had smaller home range areas than otters using the rocky outer-coast habitats of the Monterey Peninsula. In Elkhorn Slough, important habitats associated with resting included tidal creeks (for females only) and eelgrass, whereas the main channel was important for foraging behaviors of both sexes. Although using land habitats, sea otters were most likely to be found within 50 m of water. Protection of similar resting and foraging habitats in prey-rich estuaries colonized in the future will promote southern sea otters recovery by allowing them to re-colonize historically important estuarine habitats.
Schmidt, Brian A. "Determining the Habitat Limitations of Maumee River Walleye Production to Western Lake Erie Fish Stocks." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1463067261.
Full textFear, Lesley Anne. "Microbial ecology of the gut of Gammarus pulex." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250026.
Full textNeubauer, Scott C. "Carbon dynamics in a tidal freshwater marsh." W&M ScholarWorks, 2000. https://scholarworks.wm.edu/etd/1539616793.
Full textMedeiros, Elvio S. F. "Trophic ecology and energy sources for fish on the floodplain of a regulated dryland river Macintyre River, Australia /." Connect to this title online, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20051115.174552/.
Full textCooper, Margaret Anne. "Population biology of Spartina maritima and Spartina anglica monocultures in estuarine salt marshes." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336180.
Full textSchuwerack, Petra-Manuela. "Environmental pollution and disease : multiple stress responses in freshwater hosts." Thesis, Royal Holloway, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272253.
Full textBabiker, Ismail Elsheikh. "Evaluation of various biomanipulations aimed at controlling freshwater pulmonate snails." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332587.
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