Tesis sobre el tema "Coastal wetlands"
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Compte, Ciurana Jordi. "Food webs of Mediterranean coastal wetlands". Doctoral thesis, Universitat de Girona, 2010. http://hdl.handle.net/10803/7879.
Texto completoIn this PhD, direct and indirect effects of key species were studied in the aquatic community of the Empordà wetlands (Mediterranean coastal wetlands with a simple food web). Different field experiments were carried out using microcosms and mesocosms. To analyze the results, three approaches were used: taxonomic, functional and size-based. Results obtained from the experiments confirm that, in situation with absence of predator and dominance of single zooplanktonic specie (in this case Calanipeda aquaedulcis and Daphnia magna), resource partitioning among different developmental stages of same zooplanktonic specie is a strategy to reduce the intraespecific competence when the resource is limiting. On the other hand, the presence of different top-predators in aquatic community (in this case the jellyfish Odessia maeotica and the Iberian toothcarp Aphanius iberus) triggers a trophic cascade in plankton, however they have different top-down effects according to top-predator.
Trobajo, Pujadas Rosa. "Ecological analysis of periphytic diatoms in Mediterranean coastal wetlands (Empordà wetlands, NE Spain)". Doctoral thesis, Universitat de Girona, 2003. http://hdl.handle.net/10803/7661.
Texto completoA nivell d'ecosistema s'observa que els factors que afavoreixen el predomini dels diferents tipus de productors primaris (perífiton, fitoplàncton i macròfits) són la renovació i el grau d'eutròfia de l'aigua. A nivell de comunitat els factors determinants en la composició i distribució de les espècies de diatomees són els gradients confinament-inundació així com la productivitat del sistema. En funció d'aquest factors s'han establert 5 associacions de diatomees. A nivell de població es demostra que tant la salinitat, com la relació N : P a l'aigua com el moviment de l'aigua afecten la morfologia i ultraestructura de la valva de N. frustulum. De forma interessant s'observa que la salinitat, considerada com a factor individual, afecta N. frustulum a nivell poblacional provocant-li modificacions en la morfologia de la valva, per en canvi, no afecta a nivell de comunitat, ja que totes les espècies de diatomees presents en ambients de salinitat fluctuant són eurihalines.
The effects of environmental conditions on periphytic of lentic and fluctuating waters (Empordà wetlands) at the three different levels of organisation were studied: at ecosystem level, considering the role of periphyton among the primary producers; at community level, analysing the periphytic diatom species composition; and at population level studying the phenotypic plasticity of a selected diatom species (Nitzschia frustulum). The factors favouring the predominance of different primary productors (periphyton, phytoplankton and macrophytes) were the turnover and eutrophy of the water. At the community level, we observed that the main factors affecting diatom species composition and distribution are the gradients confinement-flooding and productivity of the system. Based on these factors 5 diatom assemblages have been distinguished. At the population level, the results of the present thesis proved that the morphology and ultrastructure of N. frustulum is affected by salinity, N : P ratio and movement of the water. Interestingly the results showed that salinity, as a single environmental factor, has effect at N. frustulum population level resulting in phenotypic plasticity while there is no effect of salinity at diatom community level since in such environments with fluctuating salinity all the species present are euryhaline.
Pyo, Hee-Dong. "An economic evaluation of coastal wetlands in Korea". Thesis, University of Portsmouth, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343390.
Texto completoOuyang, Xiaoguang. "Exploring Carbon Mineralisation and Burial in Coastal Wetlands". Thesis, Griffith University, 2017. http://hdl.handle.net/10072/370678.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Science, Environment, Engineering and Technology
Full Text
Theriault, Holly Jean. "Stratigraphic Analysis and Transgression Rates of Maine's Coastal Wetlands Due to Rising Sea Level". Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/TheriaultHJ2008.pdf.
Texto completoSeilheimer, Titus Spear Chow-Fraser Patricia. "Development and use of fish-based indicators of wetland quality for Great Lakes coastal wetlands". *McMaster only, 2006.
Buscar texto completoPowell, Paula Angele. "The effects of hydrology and nutrient inputs at South Milton Ley on the ecology of the common reed Phragmites australis (Cav. Trin. ex Steudal)". Thesis, University of Plymouth, 2000. http://hdl.handle.net/10026.1/2061.
Texto completoWilson, Benjamin J. "Drivers and Mechanisms of Peat Collapse in Coastal Wetlands". FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3718.
Texto completoRegan, Matthew. "Plant community response to wetland enhancement techniques in coastal wetlands of the upper St. Lawrence River". Thesis, State University of New York Col. of Environmental Science & Forestry, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10254553.
Texto completoStabilized water levels of the upper St. Lawrence River have reduced plant diversity and allowed competitively dominant taxa such as Typha x glauca and Typha angustifolia to displace productive sedge meadow habitat. This research studied the effects of two wetland enhancement techniques using habitat heterogeneity and manipulating hydrology. Dredge spoils from pothole excavations in Typha marshes were reconfigured to create habitat mounds. These habitat mounds created from an exposed seed bank had less Typha spp. and were more diverse than the surrounding remnant Typha marshes. Sedge meadow vegetation did not successfully colonize these habitat mounds. Water levels at two wetlands were raised above the water levels of the upper St. Lawrence River. Raising water levels increased floating leaf aquatic vegetation but did not decrease Typha spp. Alternative enhancement methods may be necessary to control Typha spp. while restoring sedge meadows.
Wilton, Kylee Margaret y res cand@acu edu au. "Coastal Wetland Habitat Dynamics in Selected New South Wales Estuaries". Australian Catholic University. School of Arts and Sciences, 2002. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp29.29082005.
Texto completoFruchter, Jesse. "DO LARGE, INFREQUENT DISTURBANCES RELEASE ESTUARINE WETLANDS FROM COASTAL SQUEEZING?" OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/923.
Texto completoBlount, Keyyana. "Land Use Effects on Carbon Cycling in Oregon Coastal Wetlands". Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23152.
Texto completoMatavire, Melisa M. "Impacts of sugarcane farming on coastal wetlands of the north coast of Zululand, Kwadukuza, South Africa". Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97121.
Texto completoENGLISH ABSTRACT: Wetlands are key to providing important ecosystem goods and services yet they are under threat from a number of anthropogenic activities. In particular, in this study area, agriculture in the form of sugarcane farming is a threat to wetlands as sugarcane is reliant on a good water supply. The impacts of sugarcane farming emanates from the fact that sugarcane is a mono crop that requires wetland resources and uses a lot of pesticides and fertilisers. Despite the assumed contribution of sugarcane farming to wetland loss and degradation, few studies have quantitatively assessed the spatio-temporal changes in wetland extent as well as changes in water quality because of this activity. This study assesses the impacts of sugarcane farming on wetland extent and water quality in two coastal wetlands of KwaDukuza, North coast of Zululand, South Africa. Specifically this study sought to (i) assess the impacts of sugarcane farming on the spatial extent of wetlands between 1959 and 2012, (ii) determine if sugarcane farming negatively affect water quality within the wetlands and (iii) evaluate the perceptions of local farmers regarding impacts of sugarcane farming on wetlands. Results of the study indicated an increase in the extent of Zinkwazi sugarcane fields from 62.3% to 67% between 1959 and 1989 and Nonoti sugarcane fields’ extent increased from 50.5 % to 56.4% between 1959 and 2000. The last decade from the year 2000 showed gradual decrease in the area of wetland farmed by sugarcane due to the global sugar price remaining static while the cost of farming inputs increased and due to conversion of some farms to urban developments. Unfortunately, this has not lead to an increase in wetland area as the waterfront type developments, as well as a formal settlement have replace the sugarcane in the wetlands. Water was analysed for nitrogen (N), phosphorus (P) and potassium (K) and results for both Zinkwazi and Nonoti indicated an increasing trend of N and P from upstream to the middle region of the rivers and a decreasing trend of the N and P from the middle region to downstream. Sugarcane farming does not take place below the middle region and so does not provide fresh sources of these nutrients. The downstream area where the N and P decrease also coincides with the area of the river under tidal influence such that the N and P are being diluted by the incoming tidal seawater. K showed an increasing trend from upstream to downstream and its values were higher than N and P. Concentrations of N and P above the South African water quality guidelines for aquatic ecosystem were recorded in the middle region. Furthermore, farmers’ perceived wetlands to have been transformed to agricultural land and related these changes to their sugarcane farming activities. It can thus, be concluded that sugarcane farming has resulted in wetland loss as well as deterioration of water quality within the Zinkwazi and Nonoti wetlands in KwaDukuza. In that regard, there isneed to engage farmers in wetland management programs in order to reduce the negative environmental impacts associated with sugarcane farming in wetlands.
AFRIKAANSE OPSOMMING: Vleilande is die sleutel tot die verskaffing van ‘n belangrike ekosisteem dienste, maar hulle is onder ‘n bedreiging deur 'n aantal menslike aktiwiteite. In besonder in hierdie studie area, is Argriculture in die vorm van suikerriet boerdery is bedraging vir vleilande, en suikerriet is afhanklik van 'n goeie watervoorraad. Ten spyte van die veronderstelde bydraes van suikerriet boerdery, is die vleiland aan die agteruitgang, 'n Paar studies het kwantitatief die tydruimtelike veranderinge in die vleiland, sowel as veranderinge in die gehalte van water as gevolg van hierdie aktiwiteit waargeneem. Spesifiek is hierdie studie gepoog om (i) te bepaal wat die impak van suikerriet boerdery op die ruimtelike omvang van die vleiland tussen 1959 en 2012 is, (ii) bepaal of suikerriet boerdery negatief beïnvloed is deur die gehalte van water in die vleilande en (iii) die persepsies van plaaslike boere rakende die evalueering en impak van suikerriet boerdery op die vleilande. Resultate van die studie het aangedui 'n toename in die omvang van Zinkwazi suikerriet velde van 62,3% tot 67% tussen 1959 en 1989, en die Nonoti suikerriet velde toegeneem het met 50,5% tot 56,4% tussen 1959 en 2000. Die laaste dekade van die jaar 2000 het geleidelike afname in die area van die vleilande getoon, omdat suikerriet as gevolg van die globale suiker prys die koste van boerdery-insette verhoog het, en dit het gelei tot die omskakeling van 'n paar plase na stedelike ontwikkelings. Ongelukkig het dit nie gelei tot 'n toename in die vleiland gebiede nie, met die gevolg die waterfront tipe ontwikkelings, asook 'n formele nedersetting, vervang die suikerriet in die vleilande. Water is ontleed vir N, P en K en resultate vir beide Zinkwazi en Nonoti, het aangedui 'n toenemende tendens van stikstof en Fosfor. Dit gaan stroomop na die middel-streek van die riviere en 'n dalende neiging van die N en P uit die middel streek stroomaf. Suikerriet boerdery vind nie plaas onder die middel streek nie, en so is daar nie vars bronne, wat van hierdie voedingstowwe verskaf nie. Die stroomaf gebied waar die N en P ‘n afname het, val ook saam met die gebied van die rivier onder die gety , en dit beinvloed sodanig dat die N en P se water verdun word deur die inkomende gety se seewater. K het 'n toenemende neiging van stroomop en stroomaf en sy waardes is hoër as van die N en P. Konsentrasies van N en P bo die Suid-Afrikaanse water standaard riglyne is in die middel streek aangeteken. Verder, beskou boere dat die vleilande behoort te verander om die landbougrond en verwante veranderinge aan hul suikerriet boerdery en aktiwiteite. Ons kan dus aflei dat suikerriet boerdery het gelei tot die vleiland se verlies asook die verandering in die watergehalte in die Zinkwazi en die Nonoti vleilande in KwaDukuza. In dié verband is dit nodig dat die boere in die vleiland by programme betrek word ten einde die negatiewe omgewingsimpakte wat met suikerriet boerdery gepaard gaan in vleilande te verminder.
Anorov, Julie Margaret y n/a. "Integrated Study of Coastal Wetland Characteristics and Geomorphic Processes in a South East Queensland Catchment". Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060223.153104.
Texto completoAnorov, Julie Margaret. "Integrated Study of Coastal Wetland Characteristics and Geomorphic Processes in a South East Queensland Catchment". Thesis, Griffith University, 2004. http://hdl.handle.net/10072/365955.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
Full Text
Ogorek, Jacob. "Sediment methylmercury concentrations and production rates in coastal wetlands of Chequamegon Bay (WI), Lake Superior /". Connect to online version, 2009. http://minds.wisconsin.edu/handle/1793/45132.
Texto completoMcNair, Sheila A. Chow-Fraser Patricia. "The use of primary producers for assessing and monitoring aquatic habitat quality in Great Lakes coastal wetlands". *McMaster only, 2006.
Buscar texto completoTeasdale, Phillip Angus. "The late holocene evolution of coastal wetlands in Argyll, Western Scotland". Thesis, Brunel University, 2005. http://bura.brunel.ac.uk/handle/2438/5574.
Texto completoCummings, Angela R. "An Analysis of Palustrine Mitigation Wetlands in the Virginia Coastal Plain". Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/78141.
Texto completoMaster of Science
Grieger, Rebekah. "Resilience of Coastal Freshwater Wetland Vegetation to Climate Change". Thesis, Griffith University, 2021. http://hdl.handle.net/10072/410470.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
Charles, Sean Patrick. "Saltwater Intrusion and Vegetation Shifts Drive Changes in Carbon Storage in Coastal Wetlands". FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3791.
Texto completoChaun, Melissa Claire. "A Comparison of Three Wetland Evaluation Methods in their Assessment of Nontidal Wetlands in the Coastal Plain of Virginia". W&M ScholarWorks, 1995. https://scholarworks.wm.edu/etd/1539617683.
Texto completoShirley, Laura J. "Land-cover change in coastal wetlands along the northern Gulf of Mexico /". Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1251832991&sid=6&Fmt=2&clientId=1509&RQT=309&VName=PQD.
Texto completoZOBRIST, KURT DANIEL. "COASTAL HARMONY: BETWEEN MARINE ECOSYSTEMS AND COASTAL DEVELOPMENT". University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1082747560.
Texto completoDowns, Christine Marie. "Imaging Wetland Hydrogeophysics: Applications of Critical Zone Hydrogeophysics to Better Understand Hydrogeologic Conditions in Coastal and Inland Wetlands and Waters". Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7397.
Texto completoMacÃdo, JoemÃlia ConceiÃÃo AraÃjo. "Distribution of functional groups of aquatic plants in coastal wetlands of northeastern Brazil". Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14346.
Texto completoAs plantas aquÃticas situadas em lagoas costeiras apresentam traÃos funcionais selecionados por condiÃÃes abiÃticas e relacionados à histÃria de vida, que lhes permitiram a colonizaÃÃo e estabelecimento nesses ambientes. O presente trabalho testou as seguintes hipÃteses: (1) que as espÃcies possuem um padrÃo homogÃneo de traÃos funcionais, resultando na formaÃÃo de poucos grupos; (2) que as variÃveis limnolÃgicas e pedolÃgicas atuam como filtro que selecionam esses traÃos e interferem na distribuiÃÃo das populaÃÃes na lagoa. Desta forma os traÃos funcionais das espÃcies presentes numa lagoa costeira do nordeste brasileiro foram analisados por meio de uma amostragem por transectos. Amostras de sedimento foram retiradas e analisadas em laboratÃrio. Os parÃmetros limnolÃgicos foram aferidos em campo, assim como a profundidade da lÃmina dâÃgua e a distÃncia de ocorrÃncia das espÃcies em relaÃÃo à margem. Os dados biolÃgicos evidenciaram a formaÃÃo de dois grupos funcionais, corroborando a primeira hipÃtese. PorÃm, as variÃveis abiÃticas foram associadas à distribuiÃÃo de poucas populaÃÃes, refutando a segunda hipÃtese. Com isso concluÃmos que a comunidade de plantas aquÃticas analisada à formada por traÃos semelhantes e os efeitos abiÃticos nÃo sÃo determinantes para formaÃÃo destes grupos.
Aquatic plants located in coastal lagoons have functional traits selected by abiotic conditions and related to the history of life, which allowed them to colonization and establishment in these environments. The present study tested the following hypotheses: (1) that the species have a homogeneous pattern of functional traits, resulting in the formation of a few groups; (2) that the limnological variables and soil act as a filter to select those traits and interfere in the distribution of populations in the pond. Thus the functional traits of the species present in a coastal lagoon in northeastern Brazil were analyzed using a sampling transects. Sediment samples were taken and analyzed in the laboratory. The limnology parameters were measured in the field, as well as the depth of the water depth and the occurrence of species away from the margin. Biological data showed formation of two functional groups, supporting the first hypothesis. But the abiotic variables were associated with the distribution of a few people, refuting the latter. Thus we conclude that the community of aquatic plants analyzed is formed by similar traits and abiotic effects are not decisive for the formation of these groups.
Kapusinski, Douglas John. "Factors Affecting Invertebrate and Fish Communities in Coastal Wetlands of the Great Lakes". Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1353202400.
Texto completoFu, Jing. "Environmental Impacts of Aquaculture Ponds on Coastal Wetlands in the Yellow River Estuary". Kyoto University, 2017. http://hdl.handle.net/2433/225949.
Texto completoKemp, Annabeth S. "Freshwater cyanoprokaryota blooms in the Swan Coastal Plain wetlands: ecology, taxonomy and toxicology". Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/1477.
Texto completoKemp, Annabeth S. "Freshwater cyanoprokaryota blooms in the Swan Coastal Plain wetlands: ecology, taxonomy and toxicology". Curtin University of Technology, Division of Science and Engineering, Department of Environmental Biology, 2009. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=129384.
Texto completoA total of 24 species were identified and described, of which nine species had not been previously documented in the area. This included the potentially toxic species Cylindrospermopsis raciborskii, Aphanizomenon ovalisporum and Anabaena bergii var. limnetica. An illustrated guide to the common bloom-forming species was generated using conventional taxonomic criteria.
Microcystis flos-aquae and Microcystis aeruginosa were the dominant bloom-forming cyanoprokaryotes, widespread in their distribution. Anabaena circinalis, A. bergii var. limnetica and Anabaenopsis elenkinii were the common filamentous species. Anabaena circinalis was common to certain freshwater sites, while A. bergii var. limnetica and A. elenkinii occurred in salinity ranging from fresh (< 1ppt) to hyposaline (3-10 ppt). Sites with similar species assemblages were identified using two-way indicator species analysis and clustering analysis. From this, a distinct distribution pattern emerged, which was defined by the main genera observed in the lakes – Microcystis, Anabaena, Aphanizomenon and Anabaenopsis.
The spatial and temporal distribution of the common bloom-forming cyanoprokaryote species was examined in conjunction with spring-summer physico-chemical data using principal component analysis. It was found that pH, water temperature and electrical conductivity/salinity accounted for variations among the lakes, with electrical conductivity the variable explaining the greatest variation. Lakes located on the coast, or further inland at the base of the Darling Scarp, were more hyposaline to saline, and the remaining lakes were fresh. Although the SCP lakes form consanguineous groups based on geochemistry and hydrology, no similarities among them were found in terms of water quality.
The relationship between nitrogen (N) and phosphorus (P) concentrations (total and dissolved inorganic) and cyanoprokaryote community structure (N-fixing versus non-N-fixing species) was investigated in five selected lakes; Yangebup Lake, Bibra Lake, Blue Gum Lake, Tomato Lake and Emu Lake. The lakes ranged from mesotrophic to eutrophic and supported spring-summer blooms containing multiple species. Overall an inverse relationship between cyanoprokaryote abundance and total ambient nutrient concentrations at the time of the blooms was evident. No transition in dominance in the community was observed in Yangebup Lake, Emu Lake and Bibra Lake, as they were dominated by non-heterocytic species (M. aeruginosa and M. flos-aquae) throughout spring and summer. For Yangebup Lake and Bibra Lake, the abundance of non-heterocytic species decreased concomitantly with decreasing dissolved inorganic N. In contrast, heterocytic species (A. circinalis) dominated the spring community in Tomato Lake, and summer community in Blue Gum Lake, when N and P concentrations were at their highest.
The presence of microcystins in Microcystis dominated blooms was examined using high performance chromatography. A total of 32 natural bloom samples, representing 13 lakes, were analysed for microcystin variants; -LR, -RR and -YR. Twenty-eight samples proved to be toxic with the highest total microcystin concentration from 1645 to 8428.6 µg L[superscript]-1, the lowest concentrations were less than 10 µg L[superscript]-1 with some below the detection limit. Microcystis aeruginosa and M. flos-aquae were associated with these microcystin-containing blooms, although M. flos-aquae appear to be less toxic. The presence of Nodularia spumigena in the Lake Yangebup was associated with high concentrations of nodularin (1664 µg L[superscript]-1).
Employing enzyme-linked immunosorbent assay for microcystins and the brine shrimp (Artemia) bioassays allowed a greater number of lake samples to be analysed and provided a rapid assessment of toxicity. The three methods for cyanotoxin detection verified Yangebup Lake, Herdsman Lake, Hyde Park, Jackadder Lake and Emu Lake as highly toxic sites. Low toxicity was demonstrated in samples from Lake Goollelal, Lake Joondalup, Lake Claremont, Blue Gum Lake and North Lake. These results provided the first evidence of cyanotoxin producing blooms in urban lakes of the SCP.
A comparative study on cyanoprokaryota blooms in Swan River estuary, upper Canning River and upper Serpentine River found that these sites, although hyposaline to saline, contained species that were common in the freshwater lakes. Sampling the river systems showed M. aeruginosa, M. flos-aquae, A. circinalis, A. elenkinii and Planktothrix planctonica to be cosmopolitan in distribution, present in SCP wetlands of varied salinity. Similarities between the upper Canning River and lakes in environmental conditions and species assemblage were demonstrated using multivariate analyses.
Toxin analysis of bloom samples from the Swan River and upper Canning River revealed microcystin concentrations were less than that of the surrounding lakes (1.05-124.16 µg L[superscript]-1). Similarly, nodularin concentrations were higher in Yangebup Lake than the upper Serpentine River. However, the dominance of Anabaena in Canning River samples, and the highly toxic result from the Artemia bioassay suggests microcystin is not the predominant cyanotoxin in this wetland.
This study has produced an overview of the distribution and morphology of cyanotoxin-producing cyanoprokaryotes in the SCP wetlands. The data presented provide the basis for further cyanoprokaryote research in Western Australia, in particular the molecular characterisation of bloom-forming toxic species.
Mazzei, Viviana. "Diatoms as tools for inferring changing environmental gradients in coastal, freshwater wetlands threatened by saltwater intrusion". FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3716.
Texto completoSchmidt, John Michael. "Litter Decomposition in Created and Adjacent Forested Wetlands of the Coastal Plain of Virginia". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/43580.
Texto completoMaster of Science
Johnson, David Edward. "Conserving inter-tidal wetlands : a regional ecosystem-based approach to rehabilitation and recreation". Thesis, Southampton Solent University, 1998. http://ssudl.solent.ac.uk/1274/.
Texto completoJohnson, Jaimie L. "The Aquatic Community Associated with Native and Invasive Macrophytes in Lake Erie Coastal Wetlands". Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1535382268156399.
Texto completoServais, Shelby M. "Changes in Soil Microbial Functioning in Coastal Wetlands Exposed to Environmental Stressors and Subsidies". FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3821.
Texto completoLoder, Nicholas Mason. "An evaluation of the potential of coastal wetlands for hurricane surge and wave energy reduction". [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3139.
Texto completoEgnotovich, Michael Steven. "Eutrophication and coastal wetlands linking nutrient enrichment to tidal freshwater marsh ecosystem structure and function /". College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3823.
Texto completoThesis research directed by: Marine-Estuarine-Environmental Sciences. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Brien, Lynn Ferrara. "Modeling eutrophication vulnerability in coastal Louisiana wetlands impacted by freshwater diversion: a remote sensing approach". Diss., Kansas State University, 2015. http://hdl.handle.net/2097/18999.
Texto completoDepartment of Geography
Kevin P. Price
A major strategy in response to rapid degradation and loss of Louisiana’s coastal wetlands has been the construction of siphon diversion projects. The diversions are designed to reintroduce nutrient enriched freshwater from the Mississippi River into wetland ecosystems to combat saltwater intrusion and stimulate marsh growth. The lack of consensus regarding the effects of river diversions on nutrient enrichment of wetland ecosystems is coupled with major concerns about eutrophication. Locating, assessing, and monitoring eutrophic marsh vegetation represent major challenges to understanding the impacts of freshwater diversions. As a result, this study was undertaken to investigate the feasibility of modeling eutrophication vulnerability of a coastal Louisiana marsh receiving turbid Mississippi River water. The major objective was to integrate remotely sensed data with field measurements of vegetation biophysical characteristics and historical ecosystem survey data to delineate landscape patterns suggestive of vulnerability to eutrophication. The initial step in accomplishing this goal was to model the spatial distribution of freshwater impacts using satellite image-based turbidity frequency data associated with siphon diversion operation. Secondly, satellite and spectroradiometer band combinations and vegetation indices optimal for modeling marsh biophysical characteristics related to nutrient enrichment were identified. Finally, satellite image data were successfully integrated with measures of historical and concurrent marsh biophysical characteristics to model the spatial distribution of eutrophication vulnerability and to elucidate the impacts of freshwater diversions.
Quick, Lynne. "Late Quaternary palaeoenvironments of the southern Cape, South Africa palynological evidence from three coastal wetlands". Doctoral thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/4798.
Texto completoIncludes bibliographical references.
Despite significant advances in palaeoenvironmental research in southern Africa, the late Quaternary palaeoenvironmental history of the region remains incomplete as palaeoclimatic proxy records are temporally and spatially discontinuous. The southern Cape is a key focus area within this region as it encompasses the Fynbos Biome, a global biodiversity hotspot, as well as rare Afrotemperate forest patches and is therefore of great botanical importance. As this area includes the transition from southern Africa’s winter rainfall zone to the year-round rainfall zone, it is also important from a climatic perspective.
Ward, Raymond. "Landscape and ecological modelling : development of a plant community prediction tool for Estonian coastal wetlands". Thesis, University of Brighton, 2012. https://research.brighton.ac.uk/en/studentTheses/37b928df-19dc-48f5-aad8-08398383fb95.
Texto completoPantaleoni, Eva. "Assessing Coastal Plain Wetland Composition using Advanced Spaceborne Thermal Emission and Reflection Radiometer Imagery". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28419.
Texto completoPh. D.
Leung, Wai-hung y 梁偉雄. "The conservation of coastal wetlands, especially the Mai Po marshes, in Hong Kong: problems and prospects". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31253441.
Texto completoCope, Jeff A. "Coastal squeeze of vegetation zones in the Los Cerritos Wetlands| The effect of sea level rise". Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1583669.
Texto completoThis project assesses the elevation of several vegetation zones of the Los Cerritos Wetlands in Southern California to determine the possible effects of sea level rise on the salt marsh vegetation, the foundation of coastal salt marsh ecology. Steamshovel Sough in the Los Cerritos Wetland contains ideal habitat for the project. This coastal salt marsh is unique in that it abuts artificial elevation gradients of urban development on all sides. The confined nature of the wetland restricts its ability to adjust to future sea levels, a process known as coastal squeeze, which calls the sustainability of this scarce ecosystem into question. In-situ surveying of indicator species Parrish's Glasswort and Pacific Cordgrass (Arthrocnemum subterminale and Spartina foliosa) revealed the habitat elevations above sea level. Modelling various sea level rise scenarios using the habitat ranges determined through in-site surveying reveal expected future habitat zones. Los Cerritos Wetland has a notable susceptibility to sea level rise because of topographic convolutions created by local urban development. One and two foot sea level rise scenarios project substantial zone shifts resulting in pronounced winners and losers. The results here highlight the delicacy of the marsh and its intimate relationship to sea level, and hold a powerful utility to restoration project managers seeking to create a salt marsh that reflects the natural distribution of various habitats and which possesses longevity in the face of the changing environment.
Ott, Emily Thomas. "Soil Genesis and Vegetation Response to Amendments and Microtopography in Two Virginia Coastal Plain Created Wetlands". Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83529.
Texto completoPh. D.
Spangler, Jonathan Travis. "An Assessment of Floating Treatment Wetlands for Reducing Nutrient Loads from Agricultural Runoff in Coastal Virginia". Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/86656.
Texto completoMaster of Science
Leung, Wai-hung. "The conservation of coastal wetlands, especially the Mai Po marshes, in Hong Kong : problems and prospects /". Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17457403.
Texto completoAnderson, Bert D. "The Distribution and Biogeochemistry of Subtropical Intertidal Microbial Mats". Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7730.
Texto completoEnwright, Nicholas. "Using Geographic Information Systems for the Functional Assessment of Texas Coastal Prairie Freshwater Wetlands Around Galveston Bay". Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28416/.
Texto completoWei, Anhua Chow-Fraser Patricia. "Forecasting the response of coastal wetlands to declining water levels and environmental disturbances in the Great Lakes". *McMaster only, 2007.
Buscar texto completoMargo, Michael Ray. "Restoration of resaca wetlands and associated wet prairie habitats at Palo Alto Battlefield National Historic Site". Texas A&M University, 2003. http://hdl.handle.net/1969.1/3918.
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