Dissertations / Theses on the topic 'Nitrogen cycling'
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Xu, Zhihong, and n/a. "Nitrogen Cycling in Leucaena Alley Cropping." Griffith University. Division of Australian Environmental Studies, 1991. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050906.155955.
Full textXu, Zhihong. "Nitrogen Cycling in Leucaena Alley Cropping." Thesis, Griffith University, 1991. http://hdl.handle.net/10072/365424.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Division of Australian Environmental Studies
Full Text
Roberts, J. Murray. "Nitrogen cycling in the Anemonia viridis symbiosis." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360160.
Full textBhogal, Anne. "Effect of long-term nitrogen applications on nitrogen cycling under continuous wheat." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294731.
Full textNgai, Zoology. "Trophic effects on nutrient cycling." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2851.
Full textKlawonn, Isabell. "Marine nitrogen fixation : Cyanobacterial nitrogen fixation and the fate of new nitrogen in the Baltic Sea." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-122080.
Full textAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 2: Manuscript.
Grantley-Smith, M. P. "Nitrogen cycling in growing cattle fed maize silage." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370353.
Full textMalone, Edward Thomas. "Development of nitrogen cycling in recently deglaciated watersheds." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5338/.
Full textHall, Cynthia Adia. "Insights into marine nitrogen cycling in coastal sediments." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28228.
Full textCommittee Chair: Ellery Ingall; Committee Member: Andrew Stack; Committee Member: Greg Huey; Committee Member: Joseph Montoya; Committee Member: Judith Curry.
Cody, Michael Jonathan. "Cycling nitrogen for productivity in agroforestry, nitrogen, lignin and polyphenol controls on mineralization." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40039.pdf.
Full textLorentz, Laura J. "Hyperspectral Reflectance and Stable Isotopic Nitrogen: Tools to Assess Forest Ecosystem Nitrogen Cycling." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51214.
Full textMaster of Science
Nave, Lucas Emil. "Nitrogen cycling in the northern hardwood forest soil, plant, and atmospheric processes /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1196187071.
Full textRosales, Villa Alida. "Insight into the nitrogen cycling in the North Sea." Thesis, University of East Anglia, 2016. https://ueaeprints.uea.ac.uk/61021/.
Full textClark, Benjamin Richard. "Plant control of nitrogen cycling : ecological and evolutionary consequences." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420981.
Full textPrior, Hannah. "Total nitrogen and total phosphorus cycling in riparian ecosystems." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285963.
Full textKemmitt, Sarah Jane. "Effects of pH on nitrogen cycling in agricultural soils." Thesis, Bangor University, 2002. https://research.bangor.ac.uk/portal/en/theses/effects-of-ph-on-nitrogen-cycling-in-agricultural-soils(4d4c1c3d-6650-4eb6-bcac-7aadbda17631).html.
Full textLi, Renssheng. "Nitrogen cycling in young mine soils in Southwest Virginia." Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39924.
Full textPh. D.
Li, Jinling. "Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/49585.
Full textPh. D.
Yamashita, Tamon. "Nitrogen cycling in soil ecosystems of temperate coniferous plantations." Kyoto University, 2005. http://hdl.handle.net/2433/145441.
Full text0048
新制・論文博士
博士(農学)
乙第11586号
論農博第2546号
新制||農||902(附属図書館)
学位論文||H17||N3990(農学部図書室)
22885
UT51-2004-U483
京都大学大学院農学研究科熱帯農学専攻
(主査)教授 武田 博清, 教授 東 順一, 教授 谷 誠
学位規則第4条第2項該当
Waddill, Dan W. "Nitrogen cycling in tall fescue turf with added clippings." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07212009-040500/.
Full textNoppe, Philip Alan 1959. "Nitrogen cycling at Emerald Lake watershed, Sequoia National Park." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/192018.
Full textSoomro, Zaheer Ahmed. "Cycling of dissolved organic nitrogen in plant-soil systems." Thesis, Bangor University, 2014. https://research.bangor.ac.uk/portal/en/theses/cycling-of-dissolved-organic-nitrogen-in-plantsoil-systems(698c6c22-9cac-4493-8c5b-43f8a5d482ec).html.
Full textWarren, Melissa. "Interactions between nitrogen fixation and methane cycling in boreal peat bogs." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53620.
Full textCrook, Hannah D. "Carbon and nitrogen cycling in upland wetlands : impacts of changing climate and atmospheric nitrogen deposition." Thesis, University of Reading, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412169.
Full textNewton, Jennifer Denise. "Evidence for manganese-catalyzed nitrogen cycling in salt marsh sediments." Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-04072006-133610/.
Full textTaillefert, Martial, Committee Chair ; Ingall, Ellery, Committee Member ; DiChristina, Thomas, Committee Member.
Shelford, Emma Joyce. "Influence of bacterial viruses on nitrogen cycling in the ocean." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/48494.
Full textScience, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
Southwell, Melissa W. Martens Christopher S. "Sponges impacts on coral reef nitrogen cycling, Key Largo, Florida." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,756.
Full textTitle from electronic title page (viewed Dec. 18, 2007). "... in partial fulfillment of the requirements for the degree Doctor of Philosophy in the Department of Marine Sciences." Discipline: Marine Sciences; Department/School: Marine Sciences.
Bosch, Jennifer Anne. "Polychaetes, Hypoxia, and Nitrogen Cycling in the Mesohaline Chesapeake Bay." Thesis, University of Maryland, College Park, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3644071.
Full textBenthic macrofauna can play an important role in facilitating some of the microbial mediated processes of nitrogen cycling in estuarine sediments. Declines in benthic macrofauna, like polychaete worms, have been attributed to long-term increases in bottom water hypoxia in Chesapeake Bay. Utilizing a large monitoring dataset including benthic macrofaunal abundance, biomass, and concurrent measures of environmental parameters, I examined how environmental conditions regulate the densities of opportunistic polychaetes in a mesohaline estuarine system. This analysis points to a benthic community dominated by euryhaline, opportunistic polychaete worms (M. viridis, S. benedicti, H. filiformis, A. succinea) which have well adapted but varying responses to hypoxia and other stressful conditions. Results of two laboratory experiments with the opportunistic polychaete Alitta (Neanthes) succinea were used to quantify the short-term influence of density and size of surface-feeding polychaetes on sediment-water fluxes of inorganic nitrogen under varying oxygen conditions. Polychaete enhancements of O2 and nitrogen fluxes were strongly correlated with total animal biomass. Solute fluxes were stimulated by presence of both larger and smaller worms, but per capita effects were greater for the deep-burrowing larger polychaetes. Utilizing a unique large-scale monitoring dataset collected in the Chesapeake Bay, I employed Classification and Regression Tree (CART) and multiple linear regression (MLR) analyses to assess the relationship between benthic biomass and NH4 + efflux within different regions of the estuary by season. In addition to labile organic matter, oligohaline and mesohaline tributary temperature and salinity control the rate of nitrogen cycling and benthic macrofaunal biomass. In deeper regions of mesohaline tributaries and the mainstem Bay, dissolved oxygen was found to be the dominating parameter regulating sediment nitrogen pathways as well as the structure of the benthic macrofaunal community. With increased macrofaunal biomass, spring regressions indicated an enhancement of NH4+ efflux. In contrast, fall regressions indicated the enhancement of fixed nitrogen removal from sediments. Summer data lacked a significant relationship, but high NH4 + effluxes under hypoxic/anoxic conditions suggested dissolved oxygen is the primary driver of summer nitrogen cycling. This study, using field and laboratory data, concludes that a complex balance between seasonal and regional dissolved oxygen, temperature and salinity conditions shape not only the benthic community but also the relationship between macrofaunal biomass and sediment nitrogen flux in this eutrophic estuarine system.
Nilsson, Lino. "Nitrogen Cycling at Cold Climate Mine Sites in Northen Sweden." Licentiate thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59661.
Full textZILIUS, Mindaugas. "THE ROLE OF COMMON MACROFAUNA HOLOBIONTS IN BENTHIC NITROGEN CYCLING." Doctoral thesis, Università degli studi di Ferrara, 2021. http://hdl.handle.net/11392/2487836.
Full textIn estuarine systems, interactions between microbes and macrofauna are likely widespread and may establish through multiple mechanisms. Macrofauna, besides grazing, bioturbating sediments and ventilating burrows, can host or inoculate microbes from ambient environment. Macrofauna hosts and their associated microbes form holobionts, which are biological and functional units capable of performing multiple processes. However, they are largely understudied due to methodological limitations or oversimplification of experimental approaches. Therefore, the cumulative effects of holobionts are rarely accounted for in biogeochemical studies and their actual magnitude may be underestimated when assessing ecosystem-wide processes. In this thesis, we investigated the contribution of common macrofauna in shallow estuarine benthic sediments with emphasis on the role of ecological interactions between microbes and their invertebrate hosts on regulation of nitrogen (N) cycling processes. We used a combination of ecological, biogeochemical, and molecular approaches to partitioning the direct and indirect role of macrofauna including bioturbation, physiological and holobionts activities in benthic habitats. The results show that all macrofauna holobionts hosted active and complex microbiomes, capable of different N transformations, such as denitrification, dissimulative nitrate reduction to ammonium, and dinitrogen fixation. The detection of N transformations in common macrofauna holobionts highlights hidden and interactive effects among microbes and animals. In tropical estuarine system, abundant fiddler crab holobionts are a net dinitrogen (N2) sink, with N2 fixation exceeding N losses, and as a significant source of ammonium and dissolved organic N to the surrounding environment. On the contrary, the role of the holobionts in the temperate and boreal estuarine systems were of minor importance as compared to the activity of sediment-associated microbial communities. There, distinct macrofauna taxa in community altered benthic metabolism and N cycling directly by impacting respiration and excretion rates and indirectly by reworking sediment. The findings in this thesis further support that main biogeochemical processes in sediment are predominantly the result of the collective effects of different functional groups and their mutual interactions with associated microbes. Although the role of holobionts in colder systems was relatively low to this found in tropics, however this might be different along seasons or habitats. In the future, more studies should address environmental or biological factors that regulate holobionts activity across different taxa of macrofauna and habitats.
Masse, Jacynthe. "Nitrogen cycling processes and microbial communities in reconstructed oil-sands soils." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58378.
Full textForestry, Faculty of
Graduate
Schoenholtz, Stephen Hanley. "Restoration of nitrogen and carbon cycling in an Appalachian mine spoil /." This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135352/.
Full textWalne, A. W. "A modelling study of nitrogen cycling in the Firth of Clyde." Thesis, Bangor University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358856.
Full textNeubacher, Elke. "Oxygen and nitrogen cycling in sediments of the southern North sea." Thesis, Queen Mary, University of London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509603.
Full textSzeinbaum, Nadia Heliana. "Role of microbial manganese respiration in the anaerobic cycling of nitrogen." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53407.
Full textNaqasima-Sobey, Milika. "The role bottom sediments in nitrogen cycling in a tropical lagoon." Thesis, University of Essex, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402709.
Full textKritzler, Ully H. "Biological and environmental drivers of carbon and nitrogen cycling in peatland." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=192155.
Full textHeise, Julia [Verfasser], and Rainer [Akademischer Betreuer] Meckenstock. "Nitrogen cycling in technical water systems / Julia Heise ; Betreuer: Rainer Meckenstock." Duisburg, 2021. http://d-nb.info/1232175986/34.
Full textWischer, Daniela. "Methylated amine-utilising bacteria and microbial nitrogen cycling in Movile Cave." Thesis, University of East Anglia, 2014. https://ueaeprints.uea.ac.uk/56877/.
Full textSchoenholtz, Stephen H. "Restoration of nitrogen and carbon cycling in an Appalachian mine spoil." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/28437.
Full textPh. D.
Kim, Dong Yeob. "Municipal wastewater effects on nitrogen cycling in a mature hardwood forest." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40072.
Full textPh. D.
Bamber, Kevin William. "Nitrogen Cycling from Fall Applications of Biosolids to Winter Small Grains." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/71870.
Full textMaster of Science
McCallum, Roisin. "Organic matter and nitrogen cycling in a heavily modified coastal lagoon." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2552.
Full textLiang, Baochang. "A study of corn production and nitrogen cycling in the soil-plant system." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39426.
Full textWalecka-Hutchison, Claudia Walworth James L. "Nitrogen dynamics in diesel biodegradation effects of water potential, soil C:N ratios, and nitrogen cycling on biodegradation efficacy /." FIND on the Web, 2005.
Find full textAppendix A - Hydrocarbon biodegradation rates and water potential in nitrogen augmented desert soils, by Claudia Walecka-Hutchison and James L. Walworth ; Appendix B - Assessment of C:N ratios and water potential for nitrogen optimization in diesel bioremediation, by Claudia Walecka-Hutchison and James L. Walworth ; Appendix C - Evaluating the effects of gross nitrogen mineralization, immobilization and nitrification on nitrogen fertilizer availability during diesel biodegradation, by Claudia Walecka-Hutchison and James L. Walworth. Includes bibliographical references (leaves 71-82) and appendices.
Walecka-Hutchison, Claudia. "Nitrogen dynamics in diesel biodegradation : effects of water potential, soil C:N ratios, and nitrogen cycling on biodegradation efficacy." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/191274.
Full textWebster, Alison Mary. "An investigation of the microbial ecology of biofilms from a model gravel bed hydroponic system." Thesis, University of Portsmouth, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327015.
Full textCampbell, Graeme Roy. "Community analysis of β-subgroup ammonia in sewage sludge amended soil." Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602053.
Full textHall, Jennifer M. "Manipulation of N mineralisation/immobilisation dynamics to investigate poor fertiliser recovery in improved grass pasture on ombrotrophic peat." Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU068793.
Full textMitchell, Mark E. "Nutrient Cycling Dynamics and Succession in Green Roof Ecosystems." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin150487303109878.
Full text