Dissertations / Theses on the topic 'Freshwater plankton'
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Del, Giorgio Paul A. "Heterotrophy in lake plankton." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41362.
Full textSanderson, Rory J. "Ecology of freshwater plankton in contrasting hydraulic environments." Thesis, University of Leicester, 1998. http://hdl.handle.net/2381/29785.
Full textPenczykowski, Rachel M. "Interactions between ecosystems and disease in the plankton of freshwater lakes." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50368.
Full textShe, Nian. "Chaos in aquatic systems /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/6370.
Full textHenshaw, Tracey. "Seasonal microbial dynamics in two ultra-oligotrophic Antarctic freshwater lakes." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368363.
Full textMcKinnon-Newton, Laurie. "Ecology of plankton in a terminal lake Walker Lake, Nevada, USA /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1446303.
Full textThompson, Patrick Lyn. "Regional plankton diversity as a buffer against environmental change in freshwater ecosystems." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/17411.
Full textThompson, Lisa C. "The influence of hydraulic retention time on planktonic biomass in lakes and reservoirs /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56754.
Full textHuang, Hui Doyle Robert D. "Spatial and temporal patterns of planktonic and community metabolism along the riverine-lacustrine gradient in Texas reservoirs." Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/4958.
Full textTewes, Miriam [Verfasser], and Hans-Curt [Akademischer Betreuer] Flemming. "Association of hygienically relevant microorganisms with freshwater plankton / Miriam Tewes ; Betreuer: Hans-Curt Flemming." Duisburg, 2020. http://d-nb.info/1213910552/34.
Full textArenovski, Andrea Lynn. "The distribution, abundance and ecology of mixotrophic algae in marine and freshwater plankton communities." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/33523.
Full textBriland, Ruth. "Evaluating the causes and consequences of ecosystem change in Lake Erie: From plankton to fish." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532076326598788.
Full textKatechakis, Alexis. "Selected interactions between phytoplankton, zooplankton and the microbial food web: Microcosm experiments in marine and limnic habitats." Diss., Connect to this title online, 2006. http://edoc.ub.uni-muenchen.de/archive/00005047/.
Full textTitle from PDF t.p. (viewed on May 14, 2006). Includes reprints of papers co-authored with others. Vita. Includes bibliographical references.
Reaugh, Matthew L. "The effects of freshwater flow and grazing on the plankton community structure of Chesapeake Bay tributaries." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2537.
Full textThesis research directed by: Marine, Estuarine, Environmental Sciences Graduate Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Beckwith, Matthew. "Coupling of autotrophic and heterotrophic plankton food web components in the tidal-freshwater James River, USA." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1706.
Full textAhrens, M. (Martin). "The size distribution of the limnoplankton /." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75985.
Full textTewes, Miriam [Verfasser], Hans-Curt [Akademischer Betreuer] Flemming, and Bernd [Akademischer Betreuer] Sures. "Association of hygienically relevant microorganisms with freshwater plankton / Miriam Tewes. Gutachter: Bernd Sures. Betreuer: Hans-Curt Flemming." Duisburg, 2013. http://d-nb.info/1031879668/34.
Full textKerrison, P. "Effects of low concentrations of heavy metals on plankton community dynamics in a small, fertile, freshwater lake." Thesis, University of East Anglia, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372349.
Full textHarlin, Hugo. "2D Modelling of Phytoplankton Dynamics in Freshwater Lakes." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388868.
Full textCarpenter, Kurt Davis. "Indicators of Nutrient Limited Plankton Growth in Lakes Near Mount Saint Helens, Washington." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4874.
Full textKane, Douglas D. "The development of a planktonic index of biotic integrity for Lake Erie." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1092242571.
Full textTitle from first page of PDF file. Document formatted into pages; contains xxii, 277 p.; also includes graphics. Includes bibliographical references (p. 252-277). Available online via OhioLINK's ETD Center.
Weissbach, Astrid. "The role of allelopathy in microbial food webs." Doctoral thesis, Linnéuniversitetet, Institutionen för naturvetenskap, NV, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-11375.
Full textCescon, Cinzia Tatiana. "The 1996 population dynamics of microcrustacean zooplankton at Prairie Creek Reservoir in Delaware County, Indiana." Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1048368.
Full textDepartment of Biology
Ng, Patti A. "Trends in the nearshore zooplankton community in the Indiana waters of Lake Michigan, 1990-1996." Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1041923.
Full textDepartment of Biology
Menting, Victor Lee. "The Biogeochemistry of Lakes in the Mount St. Helens Blast Zone." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/4927.
Full textScharnberg, Larry Duane. "Zooplankton Community Structure in Lakes Near Mt. St. Helens, WA." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5050.
Full textMeilander, Tracey Trzebuckowski. "The Role of Bacterioplankton in Lake Erie Ecosystem Processes: Phosphorus Dynamics and Bacterial Bioenergetics." [Kent, Ohio] : Kent State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1163880480.
Full textTitle from PDF t.p. (viewed Mar. 5, 2009). Advisor: Robert T Heath. Keywords: bacterioplankton, phosphorus dynamics, bacterial bioenergetics, labile dissolved organic carbon, bacterial productivity, bacterial respiration, bacterial growth efficiency, Lake Erie, hypoxia. Includes bibliographical references (p. 357-397).
OCK, Giyoung. "PARTICULATE ORGANIC MATTER DYNAMICS IN THE DOWNSTREAM OF DAM RESERVOIRS: ROLES OF CHANNEL GEOMORPHOLOGY AND RESPONSES OF BENTHOS COMMUNITIES." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120804.
Full textErsoy, Zeynep. "Biotic and environmental factors shaping body size distributions in freshwater planktonic food webs." Doctoral thesis, Universitat de Vic - Universitat Central de Catalunya, 2018. http://hdl.handle.net/10803/665387.
Full textIndividual size-based interactions play a significant role in the community dynamics and ecosystem processes of aquatic ecosystems, because body size is a key trait of organisms that is highly linked to metabolic rates. Climate change and disturbances influence freshwater planktonic food webs, weakening the strength of size-based interactions. In this thesis, we conducted four related but independent studies to obtain a deeper understanding of the size-based trophic interactions. We aimed to demonstrate biotic and environmental factors influencing size-based interactions in planktonic food webs using observational and experimental approaches at different locations in Europe. Overall, our key findings from this thesis suggest that integrating size-based relationships and resilience of communities together with intraspecific variation is important while studying trophic interactions. Understanding these interactions will allow us to better manage and restore aquatic ecosystems in the face of climate change and other human-induced disturbances.
Brittain, Jeffrey Thomas. "The Response of Zooplankton Communities in Montane Lakes of Different Fish Stocking Histories to Atmospheric Nitrogen Deposition Simulations." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2394.
Full textPerriss, Stephen James. "The physiological ecology of photosynthetic ciliated protozoa and their trophic roles in freshwater and brackish planktonic microbial food webs." Thesis, Lancaster University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334069.
Full textReboul, Guillaume. "Metabarcoding and metagenomic approaches to decipher microbial communities in suboxic environments Microbial eukaryotes in the suboxic chemosyn- thetic ecosystem of Movile Cave, Romania Hyper- diverse archaea near life limits at the polyextreme geothermal Dallol area Performance of the melting seawater-ice elution method on the metabarcoding characterization of benthic protist communities Core microbial communities of lacustrine microbialites sampled along an alkalinity gradient Environmental drivers of plankton protist communities along latitudinal and vertical gradients in the oldest and deepest freshwater lake Ancient Adaptive Lateral Gene Transfers in the Symbiotic Opalina-Blastocystis Stramenopile Lineage Marine signature taxa and microbial community stability along latitudinal and vertical gradients in sediments of the deepest freshwater lake." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASL041.
Full textMicrobial ecology is the science of micro-organisms and their biotic and abiotic interactions in a given ecosystem. As technology has advanced, molecular techniques have been widely used to overcome the limitations of classical approaches such as culturing and microscopy. Indeed, the development of Next Generation Sequencing (NGS) technologies in the past twenty years has largely helped to unravel the phylogenetic diversity and functional potential of microbial communities across ecosystems.Nonetheless, most of the environments studied through these techniques concentrated on relatively easily accessible, tractable and host-related ecosystems such as plankton (especially in marine ecosystems), soils and gut microbiomes. This has contributed to the rapid accumulation of a wealth of environmental diversity and metagenomic data along with advances in bioinformatics leading to the development of myriads of tools. Oxygen-depleted environments and especially their microbial eukaryote components are less studied and may lead to future phylogenetic and metabolic discoveries.In order to address this, we conducted analyses on two poorly studied suboxic ecosystems: Movile Cave (Romania) and lake Baikal sediments (Siberia, Russia). In this task, we aimed at unveiling the taxonomic and functional diversity of microorganims in these environments.To do so, I first evaluated the available bioinformatics tools and implemented a bioinformatics pipeline for 16S/18S rRNA gene-based metabarcoding analysis, making reasoned methodological choices. Then, as a case study, I carried out metabarcoding analyses of the water and floating microbial mats found in Movile Cave in order to investigate its protist diversity. Our study showed that Movile Cave, a sealed off chemosynthetic ecosystem, harbored a substantial protist diversity with species spanning most of the major eukaryotic super groups. The majority if these protists were related to species of freshwater and marine origins. Most of them were putatively anaerobic, in line with the cave environment, and suggesting that in addition to their predatory role, they might participate in prokaryote-protist symbioses.In a second study, I applied my metabarcoding pipeline to explore unique and relatively unexplored environment of Lake Baikal sediments. I first applied a metabarcoding approach using 16S and 18S rRNA genes to describe prokaryotic as well as protist diversity. Overall, the communities within these ecosystems were very diverse and enriched in ammonia-oxidizing Thaumarchaeota. We also identified several typical marine taxa which are likely planktonic but accumulate in sediments. Finally, our sampling plan allowed us to test whether differences across depth, basin or latitude affected microbial community structure. Our results showed that the composition of sediment microbial communities remained relatively stable across the samples regardless of depth or latitude.In a third study, we applied metagenomics to study the metabolic potential of communities associated to Baikal sediments and to reconstruct metagenome-assembled genomes (MAGs) of dominant organisms. This revealed the considerable ecological importance of Thaumarchaeota lineages in lake Baikal sediments, which were found to be the major autotrophic phyla and also very implicated in the nitrogen cycle. Chloroflexi and Proteobacteria-related species also appeared ecologically important.This PhD thesis reveals the taxonomic diversity of poorly studied suboxic ecosystems and therefore contributes to our knowledge of microbial diversity on Earth. Additionally, the analyses of surface sediment samples in lake Baikal adds new light on freshwater-marine transitions. The metagenomic analyses reported here allowed us to postulate a model of nutrient cycle carried out by microorganismsin these sediments. Overall, this work sheds light on the microbial ecology of oxygen-depleted environments, and most notably lake Baikal surface sediments
Marvalin, Olivier. "ABONDANCEcr, BIOMASSE, ACTIVITE ET RELATIONS TROPHIQUES DES COMMUNAUTES BACTERIENNES HETEROTROPHES DU LAC D'AYDAT (PUY DE DOME) : contribution a l'etude du fonctionnement des systemes aquatiques." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF21086.
Full textMraz, Alexis Layman. "Forecasting in the Unseeable: A Mixed Methods Model of Planktonic and Biofilm-Bound Legionella pneumophila in Building Water Systems." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu154350645678355.
Full textVail, Timothy L. "Morphometric and isozyme analysis of the planktonic cladoceran Holopedium gibberum (zaddach) /." Diss., 2000. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9982859.
Full textLai, Chao-Chen, and 賴昭成. "Temperature effects on plankton community respiration in a subtropical freshwater ecosystem." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/sf6cc5.
Full text國立臺灣大學
海洋研究所
105
With a ten-year weekly to biweekly data set taken from a P-limited subtropical reservoir, this study intends to explore the potential mechanisms in controlling the temporal variation of plankton community respiration rate (CR) and bacterial respiration rate (BR). Summer not only had high CR and BR value, but also high variation. The results showed that CR, BR, specific plankton community respiration (SCR), and specific bacterial respiration (SBR) all correlated with temperature significantly (p < 0.05). Activation energy, Ea, of CR is 0.80±0.04, SCR is 0.34±0.06, BR is 0.93±0.06, and SBR is 0.39±0.06. The results also indicated that temperature might be the major controlling factor for CR and BR. We also found that Ea-BR is high than Ea-CR, which indicate that BR was more sensitive to temperature than CR. Temperature manipulation experiment provide a situation to estimate temperature effect in wilder range. However, the most common characteristic of temperature response, activation energy (Ea), might be more variation. Our result combined two years temperature manipulation, the result proved that BR is more sensitive than CR either short-term temperature change (CR:0.69 and BR: 1.07) or long-term seasonal variation(CR: 0.67 ± 0.05 and BR:0.94 ± 0.08). Temperature change would increase system unstability. Two years result comparison showed that environmental condition would affect result warming.
Rusak, James A. "Variability in the zooplankton of north-temperate lakes its estimation, spatial and temporal extent, synchrony, and the influence of environmental change /." 2000. http://wwwlib.umi.com/cr/yorku/fullcit?pNQ56267.
Full textTypescript. Includes bibliographical references. Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pNQ56267.
Beckwith, Matthew J. "Coupling of autotrophic and heterotrophic plankton food web components in the tidal-freshwater James River, USA: /." 2009. http://hdl.handle.net/10156/2397.
Full textBrepohl, Daniela Christine [Verfasser]. "Fatty acids distribution in marine, brackish and freshwater plankton during mesocosm experiments / vorgelegt von Daniela Christine Brepohl." 2005. http://d-nb.info/975488422/34.
Full textSeaman, M. T. "A zooplankton study of Hartbeespoort Dam." Thesis, 2014. http://hdl.handle.net/10210/11141.
Full textGrünwald, Herbert M. [Verfasser]. "Effects of a pesticide mixture on plankton in freshwater mesocosms - from single substance studies to combination impacts / Herbert M. Grünwald." 2004. http://d-nb.info/970274114/34.
Full textMnisi, Peral. "A taxonomic study of the planktonic freshwater free-living copepods in Turfloop Dam, Limpopo Province." Thesis, 2021. http://hdl.handle.net/10386/3489.
Full textRepresentatives of the subclass Copepoda are the most abundant aquatic crustaceans found in most water bodies including fresh, estuarine and marine waters. Planktonic copepods contribute a major portion to the aquatic productivity and biomass in these ecosystems. Most are generally omnivorous which make them important in the energy transfer of aquatic environments. Copepods also serve as a food source for aquatic organisms including fish. Currently there are 11 137 species worldwide belonging to 10 orders. Most free-living species reported from freshwater bodies of South Africa belong to the orders Calanoida (Family Diaptomidae) and Cyclopoida (Family Cyclopidae). The copepod life cycle starts with the hatching of the eggs into nauplii (6 stages) which then molt into copepodids (5 stages), followed by the molting into the adult male and female. These copepods have high morphological diversity and as a result identification is mostly done using the morphological characteristics of the adult stage, specifically the length and shape of the antennules, the structure of the fifth legs and the relative size of the metasoma and urosome. However, identification based on morphological analyses is a cumbersome process and requires specific skills, thus molecular techniques are applied in order to expedite the identification of these numerous organisms. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) is one of the molecular-based identification approaches with a high capacity for fast and accurate identification of species without the need for a highly-skilled expert in taxonomy. Zooplankton were collected from Turfloop Dam using a plankton net and fixed and preserved in 70% ethanol. Copepods were then isolated and studied under stereo- and light microscopes, using the wooden slide technique. A total of 17 633 calanoids and 2 577 cyclopoids were collected during the sampling period of one year. Selected specimens were dissected and morphological features drawn, using drawing tubes, for identification. The examined specimens were identified as species of Lovenula, Metadiaptomus, Paradiaptomus, Mesocyclops, Thermocyclops and Microcyclops. Full descriptions and illustrations were done of the eight collected species, i.e. Lovenula falcifera, Metadiaptomus colonialis, Paradiaptomus schultzei, Mesocyclops major, Thermocyclops inopinus, Thermocyclops crassus, Thermocyclops oblongatus and Microcyclops raynerae (male). Full descriptions and illustrations were also done for the three copepodid stages (CoIII, CoIV and CoV) of ii Lovenula falcifera, Metadiaptomus colonialis and Mesocyclops major as well as copepodid stages three and five (CoIII and CoV) of Thermocyclops oblongatus. The identification of different stages are mostly based on the development of the antennules, the number of segments of the first to the fourth pairs of legs and the development stage of the fifth pair of legs. The descriptions of these copepodids are compared with those of the described copepodids of other species from the families Diaptomidae and Cyclopidae. One hundred fifty specimens of each collected species were individually prepared for protein extraction using alpha-cyano-4-hydroxycinnamic acid (CHCA) matrix solution and loaded for matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF). Protein mass spectra peaks were successfully generated for L. falcifera (6 females, 4 males and 5 female CoV), M. colonialis (24 females and 17 males), P. schultzei (8 females), M. major (15 females) and T. inopinus (19 females and 7 males). The generated data set was analysed using the Mass-Up software in an attempt to identify potential biomarkers for species identification and to perform a cluster analysis of protein peak values. From the total of 603 protein peak values generated for calanoid samples, only 164 peaks can possibly be used as potential biomarkers because they have a q-value of less than 0.05. Of the total of 585 peak values generated for all cyclopoid samples only 46 peak values can be used as potential biomarkers. The clustering analyses, based on the presence or absence of the peak values and visualized as dendrograms, displayed no clear clustering of calanoids and cyclopoids species studied. This study constitutes the second report of freshwater free-living copepods from the Limpopo Province. Full descriptions and illustrations are provided of all the adults of the collected species which improve the current knowledge regarding their morphology. Included is the first description of the male M. raynerae. Additionally, this is also the first description of the copepodid stages of some of the collected species. Thus, the study contributes towards increasing the limited knowledge of freshwater free-living copepods occurring in water bodies of the Limpopo province, but also the biodiversity of these organisms in South Africa.
National Research Foundation (NRF)
GRUJČIĆ, Vesna. "Differential freshwater flagellate community response to bacterial prey with a focus on planktonic \kur{Betaproteobacteria}." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-375267.
Full textGilpin, Cheryl. "Diel Temperature and Dissolved Oxygen Patterns in Sites with and without Planktonic Life Stage of Thompsodinium intermedium in Comal Springs, TX." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11222.
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