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Bibliografias temáticas / Nutrient cycling / Teses / dissertações

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Teses / dissertações sobre o tema "Nutrient cycling"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Ngai, Zoology. "Trophic effects on nutrient cycling." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2851.

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The top-down effects of consumers and bottom-up effects of resource availability are important in determining community structure and ecological processes. I experimentally examined the roles of consumers — both detritivores and predators — and habitat context in affecting nutrient cycling using the detritus-based insect community in bromeliad leaf wells. I also investigated the role of multiple resources in limiting plant productivity using meta analyses. The insect community in bromeliads only increased nitrogen release from leaf detritus in the presence of a predator trophic level. When onl

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2

Barthelemy, Hélène. "Herbivores influence nutrient cycling and plant nutrient uptake : insights from tundra ecosystems." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-120191.

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Reindeer appear to have strong positive effects on plant productivity and nutrient cycling in strongly nutrient-limited ecosystems. While the direct effects of grazing on vegetation composition have been intensively studied, much less is known about the indirect effect of grazing on plant-soil interactions. This thesis investigated the indirect effects of ungulate grazing on arctic plant communities via soil nutrient availability and plant nutrient uptake. At high density, the deposition of dung alone increased plant productivity both in nutrient rich and nutrient poor tundra habitats without

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3

Heggenstaller, Andrew Howard. "Productivity and nutrient cycling in bioenergy cropping systems." [Ames, Iowa : Iowa State University], 2008.

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4

Lammers, Peter J. "Energy and nutrient cycling in pig production systems." [Ames, Iowa : Iowa State University], 2009.

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5

Jabro, Nicholas Berman. "Microcosm studies of nutrient cycling in Bahamian stromatolites." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8594.

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Thesis (M.S.) -- University of Maryland, College Park, 2008.<br>Thesis 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.

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6

Langi, Martina Agustina. "Nutrient cycling in tropical plantations and secondary rainforests /." St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16357.pdf.

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7

McManamay, Ryan A. "The effect of resource stoichiometry on fish and macroinvertebrate nutrient excretion." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/30780.

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Consumer-driven nutrient cycling has been shown to be an important process in supplying inorganic nutrients to autotrophic and heterotrophic organisms in aquatic ecosystems. Theory indicates that consumer nutrient excretion is influenced primarily by an organismâ s nutrient composition; however, an organismâ s diet should also play an important role in nutrient excretion, especially if the consumer is nutrient limited. This study asks the question, how does diet influence nutrient excretion of consumers at different trophic levels? Macroinvertebrates and fish were collected from six strea

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8

Vaillant, Grace C. "Nutrient cycling at cattle feedlots field & laboratory study." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/318.

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9

Oates, Richard Hunter. "Phosphate-mineral interactions and potential consequences for nutrient cycling." Thesis, Online version of original thesis, 2008. http://hdl.handle.net/1912/2395.

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10

Mitchell, 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.

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11

Cottam, Nigel D. "Internal nutrient cycling in evergreen and deciduous tree species." Thesis, University of Aberdeen, 1990. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU027729.

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This thesis compares the cycling of nutrients (N, P, K, Mg and Ca) within twigs and foliage, between the evergreen species Pinus sylvestris L. (Scots pine) and Picea abies (L.) Karst. (Norway spruce), and the deciduous species Quercus petraea (Matt.) Liebl. (oak) and Betula pubescens Ehrh. (birch). In addition, the role of foliage produced in previous seasons as a source of nutrients for current growth, in young stands of Scots pine and lodgepole pine (Pinus contorta Loud.), was investigated by means of defoliation experiments, where various age-classes of foliage were removed. In both evergre

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12

Bush, Timothy. "Response to environmental perturbations in microbial nutrient-cycling ecosystems." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15789.

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The habitability of Earth is dependent upon the global recycling of elements essential for life, such as nitrogen, sulfur and carbon. Nutrient-cycling by micro-organisms is vital to these biogeochemical cycles because many key steps are mediated primarily, or exclusively, by microbial life. The dynamics of these cycles are highly complex, and environmental perturbations (such as changes in the oceanic oxygen concentration) can have unexpected or catastrophic effects; often causing abrupt switches between chemical states. Despite the importance of these environmental perturbations however, few

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13

Enoki, Tsutomu. "Topographic Variations of Nutrient Cycling in a Pinus Thunbergii Parl.Plantation." Kyoto University, 1997. http://hdl.handle.net/2433/160875.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第6616号<br>農博第907号<br>新制||農||734(附属図書館)<br>学位論文||H9||N2993(農学部図書室)<br>UT51-97-B287<br>京都大学大学院農学研究科林学専攻<br>(主査)教授岩坪五郎, 教授小﨑隆, 教授川那辺三郎<br>学位規則第4条第1項該当

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14

Prior, 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.

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15

Safi, Zikrullah [Verfasser]. "Nutrient cycling and nutrient use efficiency in urban and peri-urban agriculture of Kabul, Afghanistan / Zikrullah Safi." Kassel : Universitätsbibliothek Kassel, 2011. http://d-nb.info/1012867978/34.

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16

Dubeux, Júnior José Carlos B. "Management strategies to improve nutrient cycling in grazed Pensacola bahiagrass pastures." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011202.

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17

Stark, S. (Sari). "Reindeer grazing and soil nutrient cycling in boreal and tundra ecosystems." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:9514266927.

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Abstract In northernmost Fennoscandia, grazing by reindeer (Rangifer tarandus L.) has a substantial impact on the vegetation of boreal forests and arctic-alpine tundra heaths, which are reflected in below-ground processes, such as nutrient mineralization and soil organic matter decomposition. In the present thesis, the effects of reindeer grazing on soil nutrient cycling were studied by comparing grazed situation with an ungrazed control area in ten boreal forests and six arctic-alpine tundra heaths. In boreal forests, reindeer grazing reduced microbial respiration in both the oligotr

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18

Campbell, Jocelyn. "Relationships between cyanolichen communities and nutrient cycling in sub-boreal spruce forests." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/23238.

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Cyanolichens (lichens with cyanobacterial symbionts) form a distinct assemblage of epiphytes strongly associated with humid microclimatic conditions in inland British Columbia. Disparate abundance patterns in sub-boreal forests are examined in relation to the influence of overstorey tree species. A comparison of lichens on conifer saplings beneath five overstorey tree species revealed that saplings beneath Populus support a disproportionately abundant and species-rich community of cyanolichens. Cyanolichens also grew more rapidly and had lower rates of mortality beneath Populus than beneath co

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19

O'Reilly, Andrew M. "Biogeochemical Cycling and Nutrient Control Strategies for Groundwater at Stormwater Infiltration Basins." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5360.

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Elevated concentrations of nutrients, particularly nitrate, in groundwater and springs in Florida are a growing resource management concern. Stormwater infiltration basins, which are a common stormwater management practice in the well-drained karst terrain areas of Florida, are a potentially important source of nutrients to the groundwater system because stormwater exits the basin by only evaporation or infiltration. To better understand the biogeochemical processes integrating stormwater infiltration impacts on groundwater resources in a field-scale setting, a combination of hydrologic, soil

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20

Chuyong, George Bindeh. "Nutrient cycling in ectomycorrhizal legume-dominated forest in Korup National Park, Cameroon." Thesis, University of Stirling, 1994. http://hdl.handle.net/1893/2640.

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Patterns and rates of nutrient input to the forest floor in litterfall, throughfall and stemflow were investigated in plots of low and high abundance of ectomycorrhizal species. The aim of the study was to examine the comparative advantage of the ectomycorrhizal species in nutrient acquisition and cycling on nutrient-poor soils in Korup. Litterfall was similar in both forests with annual estimates of 9.00 and 8.33 t ha-1 yr-1 for LEM and HEM forests respectively. Litterfall distribution followed a mono-modal pattern, with peaks in the dry season in both forests and the HEM forest showing stron

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21

Laruelle, Goulven Gildas. "Quantifying nutrient cycling and retention in coastal waters at the global scale." Doctoral thesis, Utrecht University, Utrecht, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/282551.

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22

Tavakol, M. Hossien. "Production and nutrient cycling in three Scottish oak woods on contrasting soils." Thesis, University of Stirling, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317316.

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23

Brockett, Beth. "Patterns in forest soil microbial community composition across a range of regional climates in Western Canada." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/486.

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Soil microbial communities can be characterized by community structure and function (community composition) across a spectrum of spatial scales, and variation in soil microbial composition has been associated with a number of environmental gradients. This study investigates the structure and function of soil microbial communities under mature, undisturbed forested sites across a range of regional climates in British Columbia and Alberta, and also examines the variation in community composition within sites. Phospholipid fatty acid analysis was used to investigate the structure of soil microb

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24

Sharma, Ghanashyam. "Productivity and Nutrient Cycling in and age series of Alnus-Cardamom agroforestry in the Sikkim Himalaya." Thesis, University of North Bengal, 2001. http://hdl.handle.net/123456789/1070.

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25

Galli, Corina Verónica Sidagis. "Análise da função de uma várzea na ciclagem de nitrogênio." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-17022016-130159/.

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Para identificar a influência de uma área de várzea do ribeirão do Feijão (São Carlos-SP) sobre a ciclagem de nitrogênio e sobre a qualidade da água superficial e subsuperficial, foram analisadas as características físicas e químicas da água e determinadas as taxas de nitrificação e desnitrificação dos sedimentos da várzea. A maior concentração dos compostos nitrogenados foi observada na água de interface subsuperficial da várzea, região mais ativa em termos de fluxos de água e materiais. As taxas de nitrificação variaram de 0,145 a 0,068 &#956mol N-NO3-.g-1.dia-1 e a rota metabólica predomina

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26

Pimentel, Tania Pena. "Dinâmica do carbono em uma microbacia no extremo leste da Amazônia." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-01082016-175320/.

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O presente estudo objetiva avaliar os mecanismos de transferência de carbono entre os compartimentos atmosfera, vegetação, solo e igarapé em uma microbacia da Amazônia Ocidental. Dois igarapés drenandos, respectivamente, 2927 e 66,73 ha de floresta de terra firme, foram monitorados durante um ano. A área de estudo se encontra na zona de amortecimento de uma Unidade de Conservação de Uso Sustentável denominada Floresta Estadual do Amapá (FLOTA/AP), na região central do estado de mesmo nome. Foram coletadas as águas da chuva, da precipitação interna da floresta, do escoamento de água pelo tronco

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27

Mettam, Colin. "Nutrient cycling and oxygen availability in ancient oceans : extinction events and evolutionary opportunities." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/16334.

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28

Bilal, Ruba Candiga. "Soil Carbon and Nutrient Cycling Across Cover Types in Southern Appalachian Hardwood Forests." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/85625.

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Appalachian mixed hardwood stands along south facing slopes of the Ridge and Valley physiographic province were used to determine fine scale soil respiration (Rs ) and nutrient dynamics among four distinct cover types, white oak (WO, Quercus alba L.), scarlet oak (SO, Quercus coccinea Muech.), chestnut oak (CO, Quercus montana Wild.) and a pine-oak co-dominant cover (PO, Pinus spp. and Quercus spp. (primarily Pinus pungens Lamb. and Q. montana)). Null hypotheses were that: (1) Rs and its relationship to environmental drivers would not differ among the cover types, (2) water and nutrient use ef

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29

Altinalmazis, kondylis Andreas. "Tree diversity effects on root production, decomposition and nutrient cycling under global change." Thesis, Bordeaux, 2021. http://www.theses.fr/2021BORD0067.

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L'hypothèse de l'assurance prévoit que les forêts composées de mélanges d'espèces d'arbres pourraient mieux résister aux conditions environnementales stressantes que les forêts composées d'une seule espèce d'arbre. La majorité des travaux antérieurs ont testé cette hypothèse en se focalisant sur la productivité et les variables de réponse associées sans prendre en compte les processus souterrains. L’objectif principal de ma thèse était d’étudier l’effet de la diversité des espèces d’arbres sur les processus souterrains impliqués dans la décomposition des racines à travers des gradients climati

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30

West, Elizabeth Jane. "The Influence of Zooxanthellate and Non-zooxanthellate Jellyfish on Nutrient Cycling and Trophodynamics." Thesis, Griffith University, 2009. http://hdl.handle.net/10072/366387.

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The appearance and disappearance of large numbers of medusae is a common characteristic of jellyfish populations. Blooms of jellyfish can attain very large biomasses that cover wide areas and can be short-lived, after which time the population may crash rapidly. The sheer biomass of jellyfish during bloom periods and the ‘boom and bust’ population dynamics are likely to have considerable impacts on the surrounding ecosystem. Some species of jellyfish contain symbiotic dinoflagellates called zooxanthellae. Zooxanthellae are able to assimilate nutrients from the surrounding water and transfer ph

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31

Andersson, Sara. "Nutrient cycling by the herbivorous insect Chrysomela tremulae : Nutrient content in leaves and frass and measurements of ingestion, egestion and exuviation rates." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-125632.

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Insect herbivory on forest canopies strongly affects ecosystem nutrient cycling and availability in a variety of ways, e.g. by changing the quantity, quality and timing of nutrient input to forest soils. A qualitative method for measurements of ingestion, egestion and exuviation rates of the insect Chrysomela tremulae on leaves of the hybrid Populus tremula x tremuloides were tested in this study with the aim to detect differences in relative nutrient cycling efficiencies. The assimilation efficiency (AD), efficiency of conversion of digested food (ECD) and efficiency of conversion of ingested

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32

Meyers, Emily. "Phosphate Cycling in the Presence of Biogenic Iron Oxides and Iron-Reducing Bacteria." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37306.

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Nutrient pollution from industrial activity is an environmental problem that persists in water bodies near urban settings, and has been a primary contributor to eutrophication, bacterial contamination, and harmful algal blooms. Biogenic iron oxides offer a potential solution to the treatment of lakes and rivers containing high concentrations of phosphate, the limiting nutrient in aquatic systems. Soluble ferrous iron can act as an electron donor for iron-oxidizing bacteria, which thrive in low-oxygen environments. This results in the formation of insoluble ferric iron minerals, ideal ads

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33

Wilks, Melissa Kimberly. "Predation Mediated Carbon Turnover in Nutrient-Limited Cave Environments." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1384803278.

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34

Falconi, Claus Francois. "Complex water column nutrient dynamics in the Gulf of Trieste; freshwater nutrient discharge Vs biologicallly mediated cycling of dissolved organic matter." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3172.

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2007/2008<br>Il Golfo di Trieste, localizzato nella parte più settentrionale ed orientale del bacino Adriatico, rappresenta un’area peculiare per le sue caratteristiche geomorfologiche, oceanografiche e biologiche. In quest’area, in particolare, insistono diverse attività economiche che vanno dalla maricoltura al turismo e pertanto i problemi legati alla qualità ambientale sono oltremodo diversificati: da un lato è importante che la trofia del sistema supporti lo sviluppo e la crescita dei molluschi allevati e dall’altro la fruizione delle acque per la balneazione richiede requisiti di qualità

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35

NASCIMENTO, Sandra Maria do. "Distribuição, exportação e ciclagem de nutrientes minerais em Cupiúva (Tapirira guianensis Aubl.), em um fragmento manejado de mata atlântica no município de Goiana - PE." Universidade Federal Rural de Pernambuco, 2006. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5114.

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Submitted by Mario BC (mario@bc.ufrpe.br) on 2016-07-28T16:39:44Z No. of bitstreams: 1 Sandra Maria do Nascimento.pdf: 553060 bytes, checksum: af162526240a5bf78aa1ac5c4f3cbba7 (MD5)<br>Made available in DSpace on 2016-07-28T16:39:44Z (GMT). No. of bitstreams: 1 Sandra Maria do Nascimento.pdf: 553060 bytes, checksum: af162526240a5bf78aa1ac5c4f3cbba7 (MD5) Previous issue date: 2006-05-31<br>The Atlantic rainforest is one of the richest biomasses of the planet in terms of biodiversity, but has been compromised by considerable anthropogenic action. The present study investigated a managed fr

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Arnaudin, Mary Elin. "Benefits of Dung Beetles (Coleoptera: Scarabaeidae) on Nutrient Cycling and Forage Growth in Alpaca Pastures." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31419.

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Alpacas have been gaining prominence in the U.S. since the early 1980s. In pastures, dung beetle activity has been shown to enhance the degradation and incorporation of dung into the soil. The benefits of this activity have been quantified for cattle, but not for alpacas. The objectives of this study were to document the dung beetle species present in alpaca pastures, and to evaluate the impact of dung beetle activity on the growth of a common summer annual grass. In 2010 and 2011, dung beetle species present in alpaca pastures located at Virginia State University (VSU), were evaluated

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37

Bazza, Zineb. "Soil amendments from urban residuals and their effect on crop productivity and nutrient cycling." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63222.

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Urban residuals have been used in agriculture to decrease disposal costs, recycle nutrients, and prevent or counteract the degradation of soils linked to the intensification of agriculture. Technological advancements continue to produce novel residuals that can be used as soil amendments, with the potential to reduce or eliminate waste. This thesis entails two studies that examine the potential to utilize new urban residuals for food production. The objectives of the first study were to look at the potential benefits and impacts, on crop productivity and nutrient cycling, of using monopotassiu

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38

Spears, Bryan Millar. "Benthic-pelagic nutrient cycling in shallow lakes : investigating the functional role of benthic microalgae /." St Andrews, 2007. http://hdl.handle.net/10023/371.

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Moore, Patrick T. "Forest Recovery, Nutrient Cycling and Carbon Sequestration in a Southern Appalachian Spruce-Fir Forest." DigitalCommons@USU, 2013. http://digitalcommons.usu.edu/etd/1519.

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In order to fully understand the magnitude of the benefits that forests provide, it is crucial to understand the full suite of ecosystem services that they offer. A southern Appalachian red spruce-Fraser fir forest was intensively analyzed using a variety of methodologies to determine the nature and quantity of some of these services. Many hypotheses exist regarding the future of these spruce-fir forests, which were heavily disturbed by the non-native balsam wooly adelgid during the 1980s. Direct measurements over the course of a decade assessed these hypotheses and indicate that this forest i

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40

Spears, Bryan M. "Benthic-pelagic nutrient cycling in shallow lakes : investigating the functional role of benthic microalgae." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/371.

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Microbes, living on the boundary between the sediment and the water-column in lakes, can play a pivotal role in governing the magnitude and frequency of nutrient cycling. The purpose of this research was to focus on the role of benthic microalgae in regulating such processes and to identify spatial and temporal characteristics in their function. Approaches included the quantification of sediment nutrient concentrations (particularly P fractionation), estimates of equilibrium phosphate concentrations (EPC0) (resuspended and undisturbed sediment estimates), and assessment of the benthic microalg

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41

Wilson, Deirdre Barnetson. "Effect of nitrogen enrichment on the ecology and nutrient cycling of a lowland heath." Thesis, Manchester Metropolitan University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289616.

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This study was part of an ongoing investigation into the long-term effects of nitrogen enrichment and environmental stress on lowland heath ecology and nutrient cycling. The original experimental site, 4 replicate blocks of 2m x 1m plots, was established on pioneer-phase Calluna vulgaris - Deschampsia flexuosa heathland in 1996 (Cawley, 2000). Nitrogen treatments (0, 20, 60 & 120 kg N ha" yr") have been applied on a fortnightly basis, against a background deposition of -20 kg N ha'! yr" (NOx & NHy). During 1997 the plots were split and a six-month drought versus non-drought treatment introduce

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42

Villela, Dora Maria. "Nutrient cycling in a monodominant and other rain forest types on Maraca Island, Brazil." Thesis, University of Stirling, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296770.

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43

Hardison, Amber Kay. "Interactions between macroalgae and the sediment microbial community : nutrient cycling within shallow coastal bays /." W&M ScholarWorks, 2009. http://web.vims.edu/library/Theses/Hardison09.pdf.

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Tutua, Shane Sarere. "Residue Management and Carbon and Nutrient Cycling in Exotic Pine Plantations of Southeast Queensland." Thesis, Griffith University, 2009. http://hdl.handle.net/10072/366298.

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In Southeast Queensland, Australia, future wood production from exotic pines will rely heavily on second-rotation plantations. This increases the importance of sustaining soil fertility through logging or harvest residue retention for soil organic matter (SOM) maintenance in forest plantations. However, a greater understanding of harvest residues and their impact is essential to fully realise the potential of harvest residue management as an integral component of sustainable production forestry. Therefore, this study examined the nature of harvest residues, their decomposition and nutrient re

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Cole, Andrew. "The response of grassland carbon cycling to drought events and changes in nutrient availability." Thesis, Lancaster University, 2016. http://eprints.lancs.ac.uk/86756/.

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In grasslands, climate change has the potential to disrupt a range of ecosystem services, including agricultural production, carbon (C) storage and nutrient cycling. In particular, climate change is likely to increase the frequency and severity of extreme climate events, such as drought and the subsequent rewetting event. Yet the effect of drought events will not be consistent across grassland communities, instead likely varying with grassland properties. One such property may be the level of nutrient availability, which brings about changes in plant productivity, plant community composition,

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Aikio, S. (Sami). "Plant adaptive strategies in relation to variable resource availability, soil microbial processes and ecosystem development." Doctoral thesis, Oulun yliopisto, 2000. http://urn.fi/urn:isbn:9514256824.

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Abstract Plants have evolved various adaptive strategies for balancing the benefits and costs of having a high affinity for resources, plasticity of growth allocation and mycorrhizal symbiosis. The relative growth rates of mycorrhizal and non-mycorrhizal plants were modelled for stable and variable nutrient availability. Mycorrhizal plants had higher growth rates at low and non-mycorrhizal plants at high nutrient availability. Variation in nutrient availability reduced the growth rate of mycorrhizal plants due to a high affinity for nutrients. However, mycorrhizal plants may be able to buffer

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Torres, Lisette E. "Variation Among Fish Species in the Stoichiometry of Nutrient Excretion." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1123178303.

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Kulesza, Stephanie Brooke. "Effects of Manure Injection on Transport and Transformation of Nutrient and Antibiotics." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56895.

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Overapplication of manure in sensitive watersheds is an issue of increasing environmental concern due to increased nutrient loading and antibiotic release into aquatic environments. Manure is typically surface applied, leaving nutrients and antibiotics vulnerable to loss at the soil surface. Elevated nutrient and antibiotic loading into water bodies can increase the rate of eutrophication and occurrence of antibiotic resistance genes in areas of high animal agriculture production, such as the Chesapeake Bay watershed. Manure injection is a new technology that incorporates manure into the soil

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Smolders, Kate Elizabeth. "Forestry and Stream Ecology: A Multi-Catchment Experiment on the Effects of Selective Harvesting." Thesis, Griffith University, 2010. http://hdl.handle.net/10072/366199.

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In forested headwater streams, ecological processes such as carbon and nutrient cycling, the stream hydrological regime, and the structure of biological assemblages are tightly linked to the surrounding catchment. As such, headwater streams are vulnerable to disturbances within their catchments at various spatial (e.g. reach and catchment) and temporal (e.g. months to decades) scales. Forest harvesting is an example of a disturbance that has been widely linked to changes in the structure and function of biological communities, and changes in stream processes, such as leaf breakdown. This thesi

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Haron, Khalid. "Nutrient cycling in an oil palm (Elaeis guineensis Jacq.) plantation : residues decomposition and implications for management." Thesis, University of Exeter, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361325.

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