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Dissertations / Theses on the topic 'Nutrient salts'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Nippert, Howard Christian. "Investigation of salinity and nutrient characteristics of two groundwater based flow systems on Virginia's Eastern Shore." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-11242009-020234/.

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2

Kader, Md Abdul. "Salt stress in rice : adaptive mechanisms for cytosolic sodium homeostasis /." Ultuna : Dept. of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200657.pdf.

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3

Khalili, Maria. "Salt, water and nutrient fluxes to Himmerfjärden bay." Thesis, Uppsala University, Department of Earth Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88832.

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<p>Naturvårdsverket rankar övergödningen som det allvarligaste hotet mot Östersjön. Strategin för att bekämpa övergödningen i Östersjön har varit att reducera antropogena utsläpp av fosfor och kväve från punktkällor och diffusa källor. Många forskare anser att primärproduktionen i egentliga Östersjön huvudsakligen är begränsad av kväve varför Sverige har infört ett ambitiöst och kostsamt program för avancerad kväverening på reningsverk. Andra experter hävdar istället att reducerade kväveutsläpp är meningslösa eller rent av skadliga.</p><p>I ljuset av dessa fundamentalt olika åsikter och de hel

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4

Segal, Richard Daniel. "Primary production and nutrient dynamics in solar salt ponds." University of Western Australia. School of Water Research, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0053.

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[Truncated abstract. Formulae and special characters in this field can only be approximated. See PDF version for accurate reproduction.] Solar salt producers use solar energy to evaporate seawater as it flows through a series of ponds. The Shark Bay Salt solar ponds, at Useless Inlet in Western Australia, vary in salinity from that of seawater to four times seawater, over the pond sequence. Water column photosynthesis and biomass decreased markedly with increasing salinity along the pond sequence, while benthic productivity increased as cyanobacterial mats developed. Correspondingly, net pro

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5

Segal, Richard Daniel. "Primary production and nutrient dynamics in solar salt ponds /." Connect to this title, 2005. http://theses.library.uwa.edu.au/adt-WU2006.0053.

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6

Emmerson, Richard Hugh Christian. "Salt marsh restoration by managed retreat : metal and nutrient fluxes." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8454.

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7

Weaver, Timothy Bruce. "Deep Drainage and Leaching of Salts, Nutrients and Organochlorine Pesticides in Irrigated Vertosols." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/367980.

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In the past, it was widely assumed that deep drainage and the resultant movement of salts, nutrients and organochlorine pesticides was negligible in Vertosols (self-mulching grey and brown clays, and black earths) of the Lower Namoi Valley, New South Wales, Australia. Recent research however has shown that in fact deep drainage does occur. The main concern, therefore, is their movement beyond the reach of crop roots. Groundwater systems in the Lower Namoi Valley have been reported to be declining, suggesting that deep drainage is not reaching groundwater. Accumulation of salts, nutrients and

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8

Bosco, Maria RegÃlia de Oliveira. "Efeitos do cloreto de sÃdio sobre o desenvolvimento e absorÃÃo de nutrientes na cultura da berinjela." Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=3334.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>A berinjela (Solanum melongena L.) Ã uma espÃcie herbÃcea, hortÃcula subtropical pertencente Ã famÃlia Solonaceae, muito consumida no mundo inteiro. Em algumas Ãreas seu cultivo Ã limitado pela escassez da Ãgua de irrigaÃÃo, alÃm de apresentarem diferentes graus de salinidade. No entanto sÃo raras as informaÃÃes sobre a tolerÃncia da salinidade pela cultura da berinjela. Visando avaliar a tolerÃncia da cultura Ã salinidade e seus efeitos sobre os teores de nutrientes na planta, foi instalado um experimento em condiÃÃes de hidroponi

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9

Guerra, Cátia Carina de Almeida. "Salt effects on growth, nutrient and secondary compound contents of Diplotaxis tenuifolia." Master's thesis, Universidade de Aveiro, 2008. http://hdl.handle.net/10773/915.

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Mestrado em Biologia Marinha<br>A salinidade do solo é considerada, a nível mundial, como o principal factor abiótico de stress agrícola. Este facto levou ao desenvolvimento de diversos projectos em tolerância salina com o intuito de melhorar as culturas tradicionais e descobrir novas plantas passíveis de crescer nesses solos. Este trabalho centra-se nas respostas de crescimento de Diplotaxis tenuifolia Lquando cultivada sob condições de stress salino. O conhecimento do grau de tolerância salino desta planta é de grande interesse para a agricultura, uma vez que existem observações da ocorrênci

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10

Elsey-Quirk, Tracy. "Inter- and intraspecific variation in carbon and nutrient pools of salt marsh plants." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 236 p, 2010. http://proquest.umi.com/pqdweb?did=1993336371&sid=9&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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11

Azotea, Cody Lindell. "The Influence of Media with Different Nutrient Salt Concentrations on the Micropropagation of Hydrangea quercifolia Bartr. and Tagetes erecta L." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/720.

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As an alternative to testing nutrient components separately, four common media formulations were used: Murashige and Skoog (MS), Driver and Kuniyuki (DKW), woody plant medium (WPM) and Anderson's revised medium (AND). Each medium was tested separately. Then high salts formulation (MS and DKW) were mixed with low salts formulation (WPM and AND) at a half and half concentration. In total, eight different media were tested spanning high, intermediate and low nutrient salts concentrations. To test the media two different plant species were chosen, a woody species Hydrangea quercifolia (oaklea

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12

Fernández, Del-Saz Néstor. "In vivo metabolic regulation of plant respiration under salt and nutrient stress. Interaction with mycorrhyza." Doctoral thesis, Universitat de les Illes Balears, 2017. http://hdl.handle.net/10803/462999.

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- Introducció El paper fisiològic i regulació de la oxidasa alternativa (AOX) en plantes sota estressos nutricionals y salins no estan del tot resolts. Ambdós estressos indueixen canvis metabòlics relacionats amb el metabolisme del carboni, estat redox i demanda energètica que poden portar a canvis en l’activitat in vivo de la AOX per conferir tolerància a l’estrès. Mes investigació es necessària para desxifrar el paper de la respiració alternativa conferint flexibilitat metabòlica. Por exemple, l’ús de la simbiosi amb micorrizes arbusculars (AM) reputades per incrementar en plantes la

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13

Gadoni, Lorenzo. "Analysis of the relationships between Spartina maritima and nutrient enrichment in North Adriatic salt marshes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8436/.

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Salt marshes are coastal ecosystem in the upper intertidal zone between internal water and sea and are widely spread throughout Italy, from Friuli Venezia Giulia, in the North, to Sicily, in the South. These delicate environments are threatened by eutrophication, habitat conversion (for land reclaiming or agriculture) and climate change impacts such as sea level rise. The objectives of my thesis were to: 1) analyse the distribution and biomass of the perennial native cordgrass Spartina maritima (one of the most relevant foundation species in the low intertidal saltmarsh vegetation in the stud

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14

Verhulst, Stephanie. "Response of the Epiphytic Algal Communities to Experimentally Elevated Nutrient Levels in Intertidal Salt Marsh Habitats." UNF Digital Commons, 2013. http://digitalcommons.unf.edu/etd/435.

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Epiphytes are organisms attached to plants and are responsible for the majority of primary productivity in many aquatic systems. While epiphytes serve as a valuable food resource to herbivores, they may prove deleterious to the host plant by competing for light and nutrients, as well as increasing sheer stress. This study evaluated the impacts of nutrient additions, nitrogen and phosphorus, on the epiphytic algal community on Spartina alterniflora over the course of two growing seasons. Three nutrient treatments (N, P, and N+P) and one control treatment were placed in a salt marsh in the Tolom

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15

Piva, Guida Michela. "Effects of nutrients and sea-level rise on salt marshes of different soil types." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6294/.

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The present thesis analyses the effects of the enrichment of the soil with fertilizer and sea level rise (SLR) on salt marsh vegetation. We simulated different conditions of the salt marshes under current and projected sea level rise. These habitats are colonised by various types of plants, we focused on species belonging to the genus Spartina. This plant seems to be particularly sensitive to eutrophication due to human activities, as experiments have documented a loss of habitat associated with altered nutrient conditions. We manipulated experimentally the types of sediment, the concent

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16

Faria, Obede Borges. "Utilização de macrófitas aquáticas na produção de adobe: um estudo de caso no reservatório de Salto Grande (Americana - SP)." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-10022003-103821/.

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Este trabalho busca otimizar a utilização de biomassa de macrófitas aquáticas na produção de adobe (tijolos de terra crua, secos ao sol), baseado na determinação e estudo de suas características físicas e mecânicas, assim como nas características físicas e químicas destas plantas. A pesquisa foi desenvolvida no reservatório de Salto Grande, no município de Americana - SP. Este lago está localizado em uma área com déficit de habitações de interesse social, apresentando altos índices de urbanização e industrialização, o que acarreta no seu avançado processo de eutrofização artificial, decorrente

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17

Potgieter, Matthys Johannes. "Water, salt and nutrient budgets of the Swartkops and Sundays river estuaries using the loicz biogeochemical budgeting protocol." Thesis, Nelson Mandela Metropolitan University, 2008. http://hdl.handle.net/10948/903.

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The Swartkops River and Sundays River Estuaries are different in terms of morphology and the level of human impact. Budget models of DIP and DIN were constructed for each estuary at different riverine flow rates, using the Land-Ocean Interactions in the Coastal Zone (LOICZ) protocol. Nutrient dynamics in the estuaries were investigated using nutrient data and the results of the models. The Swartkops River Estuary acted as a sink of DIP and DIN, while being net heterotrophic. The Sundays River Estuary acted as a source of DIP and DIN, while being net autotrophic. Both systems were net denitrify

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18

Do, Thi Hai [Verfasser], and Kai [Akademischer Betreuer] Jensen. "Applying Stable Isotope Techniques to Assess Nutrient and Carbon Dynamics in Salt Marshes / Thi Hai Do ; Betreuer: Kai Jensen." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2018. http://d-nb.info/1174306483/34.

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19

Hays, Rebecca Lynn. "Vegetation patterns and nutrient cycling in Delaware Bay salt marshes Great Marsh (Lewes) and Webbs Marsh (South Bowers), Delaware /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 420 p, 2010. http://proquest.umi.com/pqdweb?did=1992440941&sid=10&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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20

Cox, Robert R. Jr. "Postbreeding Ecology of Adult Male Northern Pintails and Cinnamon Teal Near Great Salt Lake, Utah." DigitalCommons@USU, 1993. https://digitalcommons.usu.edu/etd/5281.

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I studied nutrient reserves, digestive organs, molt intensity, diets , and seasonal changes in food resources available to postbreeding adult male Northern Pintails (Anas acuta) and Cinnamon Teal (Anas cyanoptera) in marshes near Great Salt Lake, Utah. Total lipid and protein reserves of Northern Pintails were lower during the flightless period than before or after. For Cinnamon Teal, total protein was lowest during the flightless period, and total lipid showed a similar trend. Total mineral did not differ among plumage classes in either species. Use of nutrient reserves in these species may b

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21

Pattanayak, Soubhagya Kumar. "Role of external carbon and metal salt dosing in membrane bioreactor system to achieve limits of technology nutrient removal from municipal wastewater." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45672.

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Membrane bioreactor (MBR) technology in conjunction with conventional biological nutrient removal has been demonstrated to be successful in recent years. However, the limits of technology (LoT) effluent goal, ≤ 3 mg TN/L (total nitrogen) and ≤ 0.1 mg TP/L (total phosphorus), could potentially push a system to the limits of its capability. The broad objective of the long-term PhD study was to investigate role of external dosing of alum in a membrane biological nutrient removal (MBNR) system targeting LoT effluent nutrient levels. Two parallel MBNR systems, modified Bardenpho configuration, were

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22

Rodrigues, CÃcera Raquel Fernandes. "Efeito do Cloreto de SÃdio sobre o crescimento e acumulaÃÃo de nutrientes da Mamoneira." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12290.

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nÃo hÃ<br>Recentemente, especial Ãnfase tem sido direcionada ao cultivo da mamoneira, contudo, poucos sÃo os resultados disponÃveis na literatura sobre o real potencial desta cultura em se desenvolver e produzir quando cultivada em Ãreas salinizadas. Por tratar-se de uma cultura naturalmente vigorosa, de fÃcil propagaÃÃo e que pode apresentar relevante importÃncia social e econÃmica para o paÃs, especialmente para o nordeste e considerando os escassos estudos relacionados, visou-se neste trabalho, avaliar a tolerÃncia da salinidade e seus efeitos sobre os teores de nutrientes na planta. Foi in

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23

Bergsten, Steven J. "Certain Agave Species Exhibit the Capability to be Moderately Productive Under Conditions of High Salt and Drought Stress." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3818.

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Water availability and arable lands are increasingly limiting resources in many parts of the U.S., particularly in semi-arid and arid regions. As a means of addressing food and fuel demands associated with burgeoning population growth, highly productive and water-use efficient crops need to be identified. One potential crop, Agave, merits consideration and evaluation due to its putative capability to provide sustenance and energy despite growing in water-limited regions and on marginal soils. However, little is known regarding the productivity these succulent plants will have under growing con

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24

Badosa, i. Salvador Anna. "Limnological characteristics and zooplankton community structure of Mediterranean coastal lagoons undergoing restoration." Doctoral thesis, Universitat de Girona, 2007. http://hdl.handle.net/10803/7869.

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Entre 1999 i 2003 es va desenvolupar un projecte Life de restauració a la maresma de La Pletera, afectada per un pla urbanització, i a la llacuna del Ter Vell, amb un elevat grau d'eutròfia (aiguamolls del Baix Ter, NE Península Ibèrica). L'objectiu d'aquesta tesi és establir el funcionament d'ambdós ecosistemes, analitzar-ne la problemàtica ambiental i avaluar els efectes de la restauració. <br/>A la maresma de la Pletera, es va analitzar el paper de la hidrologia en la composició i dinàmica dels nutrients i del zooplàncton en cinc llacunes, tres de les quals havien estat creades dins el proj

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25

Henderson, Kelsey. "Reverse Osmosis as a Chemical-Free Technology for the Removal of Nutrients from Cure Meat Processing Wastewater." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563470474960378.

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26

Maloney, Caitlin E. "The effects of micronutrient additions on soil invertebrate activity and community structure along a successional gradient." Bowling Green State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1498074605780196.

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27

Sarno, Flavio. "Estimativas do consumo de sódio no Brasil, revisão dos benefícios relacionados à limitação do consumo deste nutriente na Síndrome Metabólica e avaliação de impacto de intervenção no local de trabalho." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/6/6138/tde-09102010-183930/.

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Introdução: O consumo excessivo de sódio tem se associado com vários efeitos prejudiciais à saúde, como aumento da pressão arterial (PA) e doença cardiovascular. Objetivos: Os objetivos da tese foram avaliar a disponibilidade de sódio no Brasil, analisar os efeitos de dietas com teores reduzidos de sódio em indivíduos com Síndrome Metabólica (SM) ou resistência à insulina (RI) e avaliar o impacto de uma intervenção que promoveu a redução da adição de sal aos alimentos. Sujeitos e métodos: A tese está composta de três artigos. O primeiro deles avaliou as aquisições de alimentos e bebidas realiz

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28

Neves, AntÃnia Leila Rocha. "Irrigation of cowpea with saline water at different growth stages and their effects on the plant and soil." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5227.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>A sensibilidade Ã salinidade varia com o estÃdio de desenvolvimento da cultura. O feijÃo-de-corda [Vigna unguiculata (L.) Walp.] constitui uma das principais culturas, em diversas regiÃes semi-Ãridas do mundo. Avaliou-se o efeito da irrigaÃÃo com Ãgua salina, aplicada em diferentes estÃdios de desenvolvimento de plantas de feijÃo-de-corda. O experimento foi conduzido no campo, e obedeceu ao delineamento em blocos ao acaso, com cinco tratamentos (T1, T2, T3, T4 e T5) e cinco repetiÃÃes. O feijÃo-de-corda foi cultivado no espaÃamen

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29

Tchuisseu, Tchakounte Gylaine Vanissa. "Assessing the role of native plant growth-promoting rhizobacteria (PGPR) isolated from Cameroon soil as bio-inoculant in improving plant growth." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22323.

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Der Mangel an Nährstoffen im Boden, hauptsächlich an Phosphor (P) und Stickstoff (N), verbunden mit einem hohen Salzgehalt und der generellen Verarmung landwirtschaftlicher Böden , sind ein ernstes Problem für die landwirtschaftliche Produktion weltweit. Daher besteht ein dringender Bedarf an Forschung und Entwicklung geeigneter landwirtschaftlicher Praktiken, um ungünstige Bodenbedingungen zu verringern und wenn möglich die Fruchtbarkeit von Kulturland wiederherzustellen. Die Verwendung von Rhizobakterien, die das Pflanzenwachstum (PGPR) fördern, kann sich bei der Entwicklung von Strategien z

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Neves, Antônia Leila Rocha. "Irrigação do feijão-de-corda com água salina em diferentes estádios de desenvolvimento e seus efeitos na planta e no solo." reponame:Repositório Institucional da UFC, 2008. http://www.repositorio.ufc.br/handle/riufc/17628.

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NEVES, Antônia Leila Rocha. Irrigation of cowpea with saline water at different growth stages and their effects on the plant and soil. 2008. 119 f. : Dissertação (mestrado) - Universidade Federal do Ceará, Centro de Ciências Agrárias, Departamento de Engenharia Agrícola. 2008<br>Submitted by demia Maia (demiamlm@gmail.com) on 2016-06-13T14:53:10Z No. of bitstreams: 1 2008_dis_alrneves.pdf: 903212 bytes, checksum: 4298d42aacb4a0815d2c06c72d764de8 (MD5)<br>Approved for entry into archive by demia Maia (demiamlm@gmail.com) on 2016-06-13T14:57:22Z (GMT) No. of bitstreams: 1 2008_dis_alrneves.pdf:

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Elgharably, Ahmed Galal. "Nutrient availability and wheat growth as affected by plant residues and inorganic fertilizers in saline soils." Thesis, 2008. http://hdl.handle.net/2440/48494.

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Over 10% of the world’s land is salt affected. Salt accumulation is a major soil constraint for agricultural sustainability in arable or newly cultivated soils. As a result of salinity, soil chemical, physical and biological properties deteriorate, plant uptake of water and nutrients, particularly P, decreases and plant growth declines. Application of plant residues can enhance the activity of soil microorganisms, the availability of nutrients, including P and the plant uptake of P and growth. Such a practice can also be economically viable as it can reduce the use of P from inorganic sources,

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Elgharably, Ahmed Galal. "Nutrient availability and wheat growth as affected by plant residues and inorganic fertilizers in saline soils." 2008. http://hdl.handle.net/2440/48494.

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Over 10% of the world’s land is salt affected. Salt accumulation is a major soil constraint for agricultural sustainability in arable or newly cultivated soils. As a result of salinity, soil chemical, physical and biological properties deteriorate, plant uptake of water and nutrients, particularly P, decreases and plant growth declines. Application of plant residues can enhance the activity of soil microorganisms, the availability of nutrients, including P and the plant uptake of P and growth. Such a practice can also be economically viable as it can reduce the use of P from inorganic sources,

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Wen-Hao, Chan, and 詹文豪. "Nutrient removal from wastewater in an attached biofilm-OMBR system using monovalent and multivalent salts as draw solute." Thesis, 2015. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22103TIT05087104%22.&searchmode=basic.

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碩士<br>國立臺北科技大學<br>環境工程與管理研究所<br>103<br>Recently, an integration of forward osmosis (FO) and MBR, known as osmosis membrane bioreactor (OMBR), has been increasing interest in wastewater treatment and has achieved promising results. However, the membrane fouling in current actived sludge-OMBR is a big challenge for long-term operation. Hence, in this study, an attached biofilm-OMBR system was designed to simultaneously reduce membrane fouling and enhanced organic and nutrient removal. The whole experiment of this work can be divided into two parts. In the first part, multivalent salt (EDTA-2Na)

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34

Wilson, Carolyn E. "Factors Affecting Carbohydrate Production and Loss in Salt Marsh Sediments of Galveston Bay." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-7146.

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Benthic microalgae (BMA) living within the surface sediment of salt marshes are highly productive organisms that provide a significant proportion of organic carbon inputs into estuarine systems. BMA secrete extracellular carbohydrates in the form of low molecular weight carbohydrates and extracellular polymeric substances (EPS) as they migrate within the sediment. EPS plays an important role in the structure and function of BMA biofilms in shallow-water systems as EPS affects habitat structure, stabilizes the sediment, reduces sediment erosion, and is a carbon source for organisms. This study

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35

Hargreaves, Sarah K. "Nutrient limitation and plant and soil microbial growth in an Arctic coastal salt marsh." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=362507&T=F.

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36

Wang, Zhongwei. "Aerobic Granular Sludge: Effect of Salt and Insights into Microbial Ecology." Diss., 2017. http://hdl.handle.net/10754/626336.

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Aerobic granular sludge (AGS) technology is a next-generation technology for the biological treatment of wastewater. The advantages of AGS in terms of small footprint, low operation and capital cost and high effluent quality makes it a strong candidate for replacing conventional biological wastewater treatment based on activated sludge (CAS) process, and potentially become the standard for biological wastewater treatment in the future. Saline wastewater is generated from many industrial processes as well as from the use of sea water as a secondary quality water for non-potable use such as toi

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37

Rulon, Leslie. "Effects of Nutrient Additions on Three Coastal Salt Marsh Plants Found in Sunset Cove, Texas." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8798.

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Eutrophication, particularly due to nitrogen (N) and phosphorus (P) input, has been massively altered by anthropogenic activities. Thus it is important to understand the impact on salt marsh plants; however studies on salt marsh plants within Galveston Bay, Texas are limited. In this study, the effects of repeated nutrient additions in monospecific plots of Spartina alterniflora, Batis maritima¸ and Salicornia virginica as well as mixed plots of B. maritima and S. virginica were studied over 15 months. Results showed that nutrient loading led to an increase in height, biomass, growth rate and

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38

Batista, Ana Isabel Lillebo. "The effect of salt marshes plants on the nutrient dynamics in the Mondego estuary (Portugal)." Doctoral thesis, 2001. http://hdl.handle.net/10316/2147.

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Tese de doutoramento em Biologia (Ecologia) apresentada à Fac. de Ciências e Tecnologia de Coimbra<br>O estuário do Mondego tem uma importância regional considerável, acrescida do facto de se encontrar sob forte pressão ambiental o que se traduz no processo de eutrofização no seu braço sul. Tendo em conta que perturbações no ciclo de nutrientes podem induzir alterações na produtividade e composição específica do sistema, o alvo deste estudo foram as áreas mais representativas e menos estudadas do braço sul do estuário do Mondego: os sapais de Spartina maritima e de Scirpus maritimus, considera

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"El Niño Southern Oscillation Influences on Precipitation, Discharge, and Nutrient Concentrations in the Upper Salt River Watershed in Arizona." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15113.

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abstract: Many studies over the past two decades examined the link between climate patterns and discharge, but few have attempted to study the effects of the El Niño Southern Oscillation (ENSO) on localized and watershed specific processes such as nutrient loading in the Southwestern United States. The Multivariate ENSO Index (MEI) is used to describe the state of the ENSO, with positive (negative) values referring to an El Niño condition (La Niña condition). This study examined the connection between the MEI and precipitation, discharge, and total nitrogen (TN) and total phosphorus (TP) conce

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Μυλωνή, Δήμητρα. "Διερεύνηση της επίδρασης γεωργικών δραστηριοτήτων στην κατανομή θρεπτικών αλάτων σε παράκτιο θαλάσσιο περιβάλλον". Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/3790.

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Η έννοια του περιβάλλοντος στις μέρες μας αποτελεί ίσως ένα από τα πλέον καυτά θέματα συζήτησης όχι μόνο στους κόλπους της επιστημονικής κοινότητας αλλά και στην καθημερινότητα των σύγχρονων ανθρώπων. Η παρουσία του ανθρώπου σε ένα οικοσύστημα, το οποίο έχει προσαρμοστεί στις ανάγκες του και τροποποιηθεί ανάλογα, με στόχο να καλύπτει τις απαιτήσεις του έχει ως αποτέλεσμα να δέχεται εισροές από το εξωτερικό περιβάλλον και να παράγει εισροές με την σειρά του για άλλα συστήματα. Σήµερα η απειλή από ένα πλήθος περιβαλλοντικών πιέσεων καθιστά αναγκαία τη γνώση εκείνων των παραγόντων που οδηγούν σ

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Schmidt, Allison Louise. "The role of marine macrophytes in providing essential ecosystem services: Their relative contribution and how services are impacted by eutrophication." 2012. http://hdl.handle.net/10222/15840.

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Most coastal ecosystems are dominated by marine macrophytes that deliver a range of ecologically and economically important services such as carbon and nitrogen cycling and storage, and habitat provision to a range of associated species. The relative contribution of these services among different vegetated habitats, however, and their alteration due to anthropogenic stressors is little known. In this thesis, I first examined the within and between ecosystem structure and services of eelgrass (Zostera marina) and rockweed (Ascophyllum nodosum) beds in Atlantic Canada. Both habitats significantl

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Martin, Katherine Clare. "Interactive effects of salinity and nutrients on mangrove physiology : implications for mangrove forest structure and function." Phd thesis, 2007. http://hdl.handle.net/1885/149911.

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