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Dissertations / Theses on the topic 'Periphyton'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Carr, Genevieve Margaret. "Prediction of periphyton in rivers." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29083.

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Periphyton communities are often the dominant primary producers and an important energy source to higher trophic levels in rivers and streams. Empirical models of periphyton biomass (chlorophyll a) that have high predictive power are generally lacking. The goal of this research was to assess and improve the predictability of periphyton in rivers. A historical river monitoring data set from Alberta showed that, in general, land use in the drainage basin was a good surrogate for instream nutrient concentrations in regression models of periphyton biomass. Land use explained up to 34% of the varia

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2

Filiz, Nur. "Impacts Of Nutrients On Periphyton Growth And Periphyton-macroinvertebrates Interactions In Shallow Lakes: A Mesocosm Experiment." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614911/index.pdf.

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Periphyton biomass on artificial strips was observed monthly to see the impacts of nutrient differences on periphyton and periphyton-macroinvertebrates interaction. The experiment was conducted for four months in a mesocosm which were runned at six countries at the same time and with the same steps. Eight enclosures at two meters depth were used that four of them had high nutrient level and the other four had low nutrient level. Sediment, macrophyte, fish, plankton, benthic invertebrates and water were added at the same time and with the same way in all of the countries. Periphyton growth whic

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3

Hayward, Shirley. "Periphyton growth in the Waipara River, North Canterbury." Thesis, University of Canterbury. Environmental Science, 2003. http://hdl.handle.net/10092/1315.

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Periphyton was monitored monthly at four sites on the Waipara River from July 1999 to January 2002. Interactions with river flows, nutrients and invertebrates were examined to determine how these factors controlled periphyton development. Comparison of the Waipara River to other New Zealand streams indicated that periphyton biomass at the uppermost site (Site 1) was generally low to moderate. Further downstream, moderate to high biomass occurred at sites 2 and 4. Biomass at Site 3 was generally low, although some very high values occurred on occasions. Periphyton biomass at sites 2 and

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4

Stone, Mark Charles. "Natural stream flow fields measurements and implications for periphyton /." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Spring2005/m%5Fstone%5F042705.pdf.

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5

Scott, J. Thad Doyle Robert D. "Periphyton-nutrient dynamics in a gradient-dominated freshwater marsh ecosystem." Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/5036.

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6

Davis, Clinton J. "Periphyton dynamics and environmental associations Truckee River, CA-NV, 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:1447636.

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7

Bessom, Stephanie Marie. "Availability and Toxicity of Nickel to Lotic Periphyton and Macroinvertebrates." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1229483842.

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8

Hollingsworth, Emily K. "The Spatial Heterogeneity of Periphyton in Eight Southeastern Ohio Streams: How Far Can One Sample Take You?" Ohio : Ohio University, 2007. http://www.ohiolink.edu/etd/view.cgi?ohiou1181835600.

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9

Jasrotia, Puja. "Characterization of nitrogenase gene distribution and activity in WCA-2A periphyton." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011864.

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10

Simmons-Ferguson, Heather Elizabeth. "Total and organic mercury in periphyton from a Precambrian shield lake." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq21700.pdf.

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11

Beresford, Angela. "The dynamics of plant-associated invertebrate and periphyton communities in lakes." Thesis, Queen Mary, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407777.

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12

Biggs, Barry J. F. "Hydraulic disturbance as a determinant of periphyton development in stream ecosystems." Thesis, University of Canterbury. Zoology, 1996. http://hdl.handle.net/10092/4891.

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Field ecology has generally focussed on the quantification of patterns in the distribution of biota and attempted to explain these by comparison with variations in habitat conditions. This approach generates hypotheses about causal mechanisms which can be tested experimentally. Such approaches have been used in stream ecology and these have highlighted the role that natural physical disturbance may have in determining patterns in the distribution and abundance of taxa among streams of different regions. In recent years, there has been a great increase in effort to understand factors controlli

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13

Raffel, Ann Eileen. "Methyl Halide Production by Calcareous Periphyton Mats from the Florida Everglades." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1524.

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Methyl halides are trace gases with both natural and anthropogenic origins. Once generated, these gases transport chlorine and bromine into the stratosphere, where they play an important role in ozone depleting catalytic cycles. The Florida Everglades is one location where methyl halide emissions have been proposed to be elevated due to high primary production and ionic halogens. This region also provides a unique study environment due to salt water intrusions, which occur during storm or low marsh water level-high tide events. The purpose of this research was twofold. First, quantification of

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14

Serra, Gasa Alexandra. "Fate and effects of copper in fluvial ecosystems: the role of periphyton." Doctoral thesis, Universitat de Girona, 2009. http://hdl.handle.net/10803/7876.

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L'activitat humana és una de les majors causes d'elevades concentracions de nutrients i substàncies tòxiques en els ecosistemes fluvials. Entre la gran varietat de factors que alteren aquests ecosistemes, l'eutrofització i la contaminació per metalls pesants són dos dels principals problemes ambientals en països desenvolupats. Els biofilms fluvials (també anomenats comunitats perifítiques) representen una eina valuosa per avaluar els efectes dels contaminants (ex. nutrients i metalls) en els ecosistemes aquàtics. Aquest treball pretén investigar el destí i els efectes del Cu en els ecosisteme

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15

Harris, Craig S. "Bioaccumulation of zinc in periphyton and invertebrates, lotic field and microcosm studies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ51353.pdf.

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16

Fuelling, Lauren J. "Interactive Effects of AMD and Grazing on Periphyton Productivity, Biomass, andDiatom Diversity." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1366712152.

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17

Arnegard, Matthew E. "Toxicant-releasing substrates : a new method for delivering copper to microbial communities in SITU /." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12162009-020200/.

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18

Jöbgen, Angelika. "Gewässerrestaurierung durch Periphyton auf künstlichen Substraten : Modellversuch zur Eliminierung von Phosphor aus Oberflächengewässern /." Göttingen : Cuvillier, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015657066&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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19

Sans-Piché, Frédéric. "Metabolomics to assess the effect of toxicants on microalgae populations and periphyton communities." Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1815/.

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Le but de cette thèse a consisté à utiliser la technologie métabolomique pour répondre à des questions d'écotoxicologie ainsi qu'à des problèmes environnementaux. Une approche basée sur l'utilisation de la chromatographie en phase gazeuse couplée à la spectrométrie de masse développée précédemment a été utilisée sur des algues unicellulaires ainsi que sur du périphyton pour révéler l'effet de substances chimiques<br>The aim of this PhD project was to use a GC-MS based metabolomics approach to investigate the changes induced by toxicants on freshwater autotrophic organisms at different levels o

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20

Drerup, Samuel A. "Effects Of Conductivity And Fish Grazing On Alkaline Phosphatase Activity Of Littoral Periphyton." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1334757078.

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21

Klaus, Jaclyn Elizabeth. "In situ measurement of mercury ecotoxicological effects on stream periphyton in southwest Ohio." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1409918494.

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22

Geddes, Pamela. "Omnivory and periphyton mats: uncoupling and quantifying consumer effects in the Florida Everglades." FIU Digital Commons, 1999. https://digitalcommons.fiu.edu/etd/3585.

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The role of omnivores in structuring communities is poorly understood. I studied the effect of two abundant omnivores, grass shrimp (Palaemonetes paludosas) and eastern mosquitofish (Gambusia holbrooki), on periphyton biomass of the Florida Everglades. I performed field experiments to test for consumer top-down and “complex” top-down effects on periphyton biomass. My experiments suggested that shrimp and mosquitofish had consumptive effects on periphyton but in many instances, periphyton wet weight, AFDM, and chlorophyll a increased significantly with shrimp or fish density, suggesting compens

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23

Mewes, Daniela [Verfasser], Carola [Akademischer Betreuer] Winkelmann, and Carola [Gutachter] Winkelmann. "Periphyton-grazer interactions in headwater streams / Daniela Mewes ; Gutachter: Carola Winkelmann ; Betreuer: Carola Winkelmann." Koblenz, 2019. http://d-nb.info/1177800411/34.

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24

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.

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25

La, Hee Josette M. "The Influence of Phosphorus on Periphyton Mats from the Everglades and Three Tropical Karstic Wetlands." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/251.

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The distinctive karstic, freshwater wetlands of the northern Caribbean and Central American region support the prolific growth of calcite-rich periphyton mats. Aside from the Everglades, very little research has been conducted in these karstic wetlands, which are increasingly threatened by eutrophication. This study sought to (i) test the hypothesis that water depth and periphyton total phosphorus (TP) content are both drivers of periphyton biomass in karstic wetland habitats in Belize, Mexico and Jamaica, (ii) provide a taxonomic inventory of the periphytic diatom species in these wetlands an

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26

Veliz, Mari Aurora. "Relationship of nutrients, and mayfly (Ephemeroptera) abundance and diet to periphyton biomass in boreal streams." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ47109.pdf.

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27

Lang, David A. King Ryan Steven. "Effects of nutrient enrichment on alkaline phosphatase activity and nitrogen fixation potential in stream periphyton." Waco, Tex. : Baylor University, 2007. http://hdl.handle.net/2104/5071.

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28

Iannino, Alessandra [Verfasser], and Patrick [Gutachter] Fink. "Effects of phosphorus enrichment on the control of stream periphyton / Alessandra Iannino ; Gutachter: Patrick Fink." Köln : Universitäts- und Stadtbibliothek Köln, 2020. http://d-nb.info/1225478480/34.

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29

Bray, Jonathan Peter. "The ecology of algal assemblages across a gradient of acid mine drainage stress on the West Coast, South Island, New Zealand." Thesis, University of Canterbury. Biological Sciences, 2007. http://hdl.handle.net/10092/1492.

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Physicochemical factors, algal diversity, taxonomic composition and standing crop were investigated across a broad gradient of AMD stress in streams and rivers. 52 sites were surveyed in the vicinity of Greymouth, Reefton, Westport and Blackball, on the West Coast, South Island. Seven sites in the Reefton area were sampled from April 2006 - February 2007 to establish changes over time in benthic algal communities of AMD and reference streams. Longitudinal change and ecosystem recovery were also investigated by sampling eight sites down Devils Creek, Reefton, and two of its tributaries. AMD has

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30

Wagner, Matthew Earl. "Spatial patterns of phytoplankton and periphyton growth as indicators of estuarine condition in Escambia Bay, Florida." [Pensacola, Fla.] : University of West Florida, 2006. http://purl.fcla.edu/fcla/etd/WFE0000010.

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31

Jansson, Emma. "Lokala skillnader i konsumtion av påväxtalger och terrestra löv hos en differentierad population av Asellus aquaticus." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96962.

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That ecological and evolutionary processes can take place on the same time scale is a recent insight. Today we also know that they are directly linked to each other. In the lake Tåkern, in year 2000, there was a structural change when phytoplankton declined and submerged vegetation, mainly stoneworts began to spread. This led to evolutionary changes in the aquatic sowbug, Asellus aquaticus which had previously been limited to the reed, most likely feeding on detritus. But then, sowbugs could exploit the new habitat in stoneworts and a new food resource in terms of periphyton. The aim of this s

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32

Fagernäs, Zandra. "How will climate change affect benthic primary producers and consumers? : An experimental study on periphyton and aquatic snails." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-94525.

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The global climate is predicted to go through great changes in the 21st century, which will have impacts on ecosystems all over the world. Aquatic ecosystems will be affected by higher annual temperatures and increased runoff from surrounding terrestrial areas. The increased runoff will cause more terrestrial organic matter (TOM) to reach the waters, which will elevate levels of dissolved organic carbon and nutrients. The higher temperature, changed water color and increased nutrient concentration are together bound to affect aquatic systems, but exactly how the systems will respond is yet unc

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33

Mölzner, Jana [Verfasser], Eric von [Akademischer Betreuer] Elert, and Michael [Akademischer Betreuer] Bonkowski. "Role of volatile infochemicals in snail-periphyton interactions / Jana Mölzner. Gutachter: Eric von Elert ; Michael Bonkowski." Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1069374210/34.

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34

Kingsley, Marianne. "The effects of nutrients and hydrology on periphyton and phytoplankton in Fraser River tributaries, British Columbia." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26678.

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Physical and chemical variables were measured in riffle zones of 20 Fraser River tributaries, British Columbia, to examine which factors explain variation in algal biomass and taxonomic composition. July epilithic periphyton chlorophyll a was weakly correlated with TN, while October periphyton was significantly related to DP and conductivity. The phytoplankton biomass in July was best predicted by TP (r2 = 0.70, p ≤ 0.001, n = 19), while October phytoplankton was best predicted by a multiple regression with conductivity, current velocity and TN. In terms of taxonomic composition in October,

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35

Hughes, M. Joseph. "Determining biogeochemical assemblages on the Stony River, Grant County, WV, using fuzzy c-means and k-nearest neighbors clustering." Huntington, WV : [Marshall University Libraries], 2006. http://www.marshall.edu/etd/descript.asp?ref=723.

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36

Bray, Jonathan Peter. "The invasion ecology of Didymosphenia geminata." Thesis, University of Canterbury. Biological Sciences, 2014. http://hdl.handle.net/10092/10017.

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Didymosphenia geminata (Didymo) is a nuisance, bloom forming, invasive freshwater algae. Through an ecological survey I examined habitat associations and effects, identifying bloom preferences for stable, low nutrient rivers, often downstream of still waterbodies; with major observed changes to algal and invertebrate communities. Experimental examination of the functional significance of blooms, provided strong support for the hypothesis that blooms are an adaptive, plastic ecophysiological response to nutrient limitation, maximising internal mat cycling and phosphatase based uptake. Further

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37

Love, Danielle M. Matthews Robin A. "Effects of salmon-derived nutrients on an artificial stream system /." Online version, 2009. http://content.wwu.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=321&CISOBOX=1&REC=9.

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38

Adler, Maren. "Primärproduktion von Phytoplankton und Periphyton sowie Nährstofflimitation und -konkurrenz mit aquatischen Makrophyten im Pantanal, Mato Grosso (Brasilien)." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965212629.

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39

Gray, Heather Joy. "Aquatic macrophytes and periphyton communities as bioindicators of lake trophic status in Riding Mountain National Park, Manitoba." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/53907.

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Aquatic conservation practitioners at Riding Mountain National Park of Canada (RMNP) are concerned with maintaining and restoring the ecological integrity of lakes within the park; thus, there is a need to identify lakes potentially at risk of eutrophication. The ability to identify at-risk lakes would allow lake managers to alleviate stressors, such as excess nutrients, before irreversible changes occur in the ecosystems. Aquatic macrophytes and periphyton have potential as bioindicators of lake trophic status. Both have a widespread distribution, their growth is tightly coupled with water

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40

Ewart-Smith, Justine L. "The relationship between periphyton, flow and nutrients in foothill rivers of the south-western Cape, South Africa." Doctoral thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/10490.

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Includes bibliographical references.<br>This thesis examines spatial and temporal patterns in periphyton community composition and biomass and the environmental factors responsible for shaping these communities in south-western Cape rivers. The study focused on two prennial foothill rivers in the south-western Cape: the Berg River, which is oligotrophic but has a large dam (The Berg Dam) situated in its upper reaches; and the Molenaars River, which has a natural flow regime but is moderately enriched by trout farm effluent. Two site on the Berg River (one upstream and one downstream of the Ber

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41

França, Alline Alves. "Biodiversidade de diatomáceas (bacillariophyta) em córregos conservados do cerrado." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6214.

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Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-09-15T13:15:36Z No. of bitstreams: 2 Dissertação - Alline Alves França - 2016.pdf: 2005555 bytes, checksum: 84feb7f2b775249a2495d3a742b1ec05 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-09-15T14:42:25Z (GMT) No. of bitstreams: 2 Dissertação - Alline Alves França - 2016.pdf: 2005555 bytes, checksum: 84feb7f2b775249a2495d3a742b1ec05 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made ava

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42

Saraoglu, Ece. "Impact Of Water Level Fluctuations And Fish On Macroinvertebrate Community And Periphyton Growth In Shallow Lakes - A Mesocosm Approach." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614220/index.pdf.

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A mesocosm experiment was conducted in Lake Eymir between June &ndash<br>September 2009 in order to elucidate the effects of water level changes and fish predation on periphyton growth and macroinvertebrates in semi-arid shallow lakes. Twenty four cylindrical enclosures, each with 1.2 m diameter, open to lake bottom and atmosphere, were placed at three different depths, i.e. 0.8 m (low water level, LW), 1.6 m (high water level, HW) and 2.3 m (however, data regarding the enclosures at 2.3 m were excluded in this study due to complications after fifth sampling) to simulate water level fluctuati

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43

Taniwaki, Ricardo Hideo [UNESP]. "A comunidade perifítica e suas relações com a qualidade da água no reservatório de Itupararanga (SP, Brasil)." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/98291.

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Made available in DSpace on 2014-06-11T19:29:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-05-15Bitstream added on 2014-06-13T20:59:39Z : No. of bitstreams: 1 taniwaki_rh_me_bauru.pdf: 1064252 bytes, checksum: 1b3f9a15ac1bed4d1169edc54c9557ce (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O reservatório de Itupararanga representa grande importância na bacia hidrográfica do rio Sorocaba devido aos usos múltiplos que este ecossistema propicia à população. Dentre as diversas atividades que usufruem dos serviços ambientais desse reservatório, podemos

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44

Comeaux, Jay Louis. "Effects of copper on benthic communities in artificial microcosms." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/40317.

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45

Mahdy, Aldoushy Abdelkarim Ahmed [Verfasser]. "Top-down and bottom-up effects in shallow lake food webs with special emphasis on periphyton / Aldoushy Abdelkarim Ahmed Mahdy." Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1047796716/34.

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46

Liess, Antonia. "Nutrient Stoichiometry in Benthic Food Webs – Interactions Between Algae, Herbivores and Fish." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6933.

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47

Amaning, Kwarteng. "Streamwater and sediment chemistry of Ohio's Western Allegheny Plateau ecoregion and their relation to aquatic life." Ohio : Ohio University, 2006. http://www.ohiolink.edu/etd/view.cgi?ohiou1153757100.

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48

Rittle, Alex M. "Ecohydraulic Investigation of Diatoms in a Bedrock-Controlled Stream." UKnowledge, 2015. http://uknowledge.uky.edu/geography_etds/30.

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Recent studies within the past decade or so have shown the importance of algae in geomorphic and hydrologic processes of lotic systems. However, the ecohydraulic role of algae in bedrock systems has largely been ignored. In addition, the utility of algae as indicators of channel dynamics have often been assumed by geomorphologists, but relatively few studies have examined this relationship. The purpose of this study was to determine whether algae, specifically diatoms, are useful indicators of channel geomorphological dynamics, and to examine if distinct habitats or biotopes typical in fluviok

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49

Ozkan, Korhan. "Role Of Nitrogen In Submerged Plant Development In Mediterranean Climatic Zone - A Mesocosm Experiment." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610083/index.pdf.

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The effects of increasing nitrogen and phosphorus loading on submerged macrophyte development was tested in a mesocosm experiment for three months. Experiment consisted of three NO3-N loadings with factorial of two PO4-P loadings in a fourfold replicated design. Twenty four enclosures placed at one meter depth were isolated from the lake but kept open to sediment and atmosphere. Each enclosure stocked with ten Myriophyllum spicatum shoots with underyearling fish to reduce zooplankton grazers. Biweekly sampling and weekly nutrient additions were performed for three months. Mean total nitrogen

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戸田, 祐嗣, Yuji TODA, 明. 西村, Akira NISHIMURA, 駿介池田 та Syunsuke IKEDA. "付着藻類の一次生産および種間競争に関する数値解析". 土木学会, 2005. http://hdl.handle.net/2237/8590.

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