Dissertationen: „Wetland“

1

Lin, Wai-tung. „Created wetlands in Shing Mun River, Sha Tin“. Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25950861.

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2

Johnson, Patricia Ann. „The status of freshwater compensatory wetland migration in Washington State“. Online pdf file accessible through the World Wide Web, 2004. http://archives.evergreen.edu/masterstheses/Accession86-10MES/Johnson_PAMESThesis2004.pdf.

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3

Balcombe, Collins K. „An evaluation of vegetation and wildlife communities in mitigation and natural wetlands of West Virginia“. Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2857.

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Thesis (M.S.)--West Virginia University, 2003.
Title from document title page. Document formatted into pages; contains xx, 417 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references.

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4

Krzys, Bethaney L. „Remote identification of wetlands in Mahoning and Trumbull County, Ohio“. [Kent, Ohio] : Kent State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1227650462.

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Thesis (M.A.)--Kent State University, 2008.
Title from PDF t.p. (viewed Dec. 22, 2009). Advisor: Mandy Munro-Stasiuk. Keywords: remote sensing, wetland, wetland identification, GIS. Includes bibliographical references (p. 158-161).

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5

Holt, Courtney R. Folkerts Debbie R. „A floristic study of Weaver Creek Wetland, Santa Rosa County, Florida“. Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Biological_Sciences/Thesis/Holt_Courtney_38.pdf.

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6

Ryan, Christopher R. „Geotechnical investigation of Montrose wetland site“. Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3723.

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Thesis (M.S.)--West Virginia University, 2004.
Title from document title page. Document formatted into pages; contains xii, 191 p. : ill. (some col.), maps (some col.). Vita. Includes abstract. Includes bibliographical references (p. 117-119).

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7

Sherrill, Ursula Rose. „The restoration of wetland functions at the Rio Bosque Wetlands Park in El Paso, Texas, USA“. To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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8

Alsfeld, Amy J. „The effects of amendments and landscape position on the biotic community of constructed depressional wetlands“. Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 118 p, 2007. http://proquest.umi.com/pqdlink?did=1251902791&Fmt=7&clientId=79356&RQT=309&VName=PQD.

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9

Chan, Chung-san. „The future of the Deep Bay Wetlands, Hong Kong /“. Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18735927.

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10

Clouston, Elizabeth M. „Linking the ecological and economic values of wetlands a case study of the wetlands of Moreton Bay /“. Connect to this title online, 2002. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030828.140330/.

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11

Ari, Yilmaz. „Visions of a wetland : linking culture and conservation at Lake Manyas, Turkey /“. Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3025135.

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12

Bernal, Blanca. „CARBON SEQUESTRATION IN NATURAL AND CREATED WETLANDS“. The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1337616491.

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13

Sommer, Beate. „Drying and re-wetting of organic wetland sediments biogeochemistry and implications for wetland management /“. Connect to thesis, 2006. http://portal.ecu.edu.au/adt-public/adt-ECU2007.0025.html.

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14

Southall, Emily Jane. „The ecology of poor fen & willow carr on Goss Moor NNR, Cornwall“. Thesis, University of Plymouth, 2001. http://hdl.handle.net/10026.1/2017.

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Goss Moor NNR is a unique, rare and nationally-important wetland habitat in Mid- Cornwall. The majority of the habitats were created as a result of a long history of tin-stream mining, which ceased in the early 1900s. Phytosociological surveys of poor-fen and willow carr communities provide the first formal descriptions of the vegetation at this site. The poor-fen survey revealed twelve poor-fen vegetation types, which were distributed along a primary environmental gradient of organic matter depth, surface water height and bare substrate. Separation of the poor-fen communities by a moisture gradient was considered as spatial evidence for hydroseral succession, which begins with the colonisation of open-water pools created by tin excavations. The Salix cinerea ssp. oleifolia willow carr was divided by eight understorey communities, according to age, defined by reference to five sets of aerial photographs of Goss Moor taken over the last six decades. The average number of poor-fen species per unit area in the understorey generally decreased with age. This relationship was related to the increase in canopy cover and, therefore, shade. Willow was found to invade areas with the greatest amounts of accumulated organic material and a low water table. In the oldest and driest willow, oak saplings were found, indicating the beginning of secondary woodland. An architectural analysis of willow showed that useful age descriptors were the height of the first fork, the number of live secondary shoots, tree height and dbh, all of which generally increased with age. Spatial successional patterns were characterised using the lattice-wombling technique in three large rectangles or 'tranomes'. Plant communities were associated with either abrupt or diffuse boundary types. Abrupt boundaries or ecotones were found between heath communities and densely vegetated tall-herb fen and species-poor willow carr wetland vegetation. Diffuse or ecocline transitions occurred between communities with subtle differences in their composition. Spatial relationships between swamp and poor-fen communities were taken as evidence for space-for- time successions, these patterns varied according to location and microtopography. Investigations into the water regime showed water depth was governed by substrate heterogeneity. Homogeneous microtopography was associated with deep inundations and greatest amplitude in water depth, and most closely resembled rainfall fluctuations. The most complex microtopography resulted from the most intense tin-streaming activity. Therefore the anthropogenic history of Goss Moor plays an important role in governing the contemporary water regime and vegetation distribution. Of the wetland communities, rush pasture was the driest and poor-fen the wettest. The communities of open habitats were wetter than the willow communities. The youngest willow community was drier in the summer than the other five vegetation types studied, which was indicative of the conditions necessary for willow scrub colonisation to take place. The N:P ratio revealed that nitrogen was the limiting nutrient in all of the wetland vegetation types suggesting an early stage of successional development. High water levels were thought to be responsible for the prevalence of N-limitation on Goss Moor, creating deoxygenated substrates and leading to the demise of nitrifying bacteria and thus a reduction in the rate of soil N mineralisation. Plant strategies were used to classify the species from a number of wetland communities ranging from open-water pools to willow carr, in order to apply them to Grime's triangular model. The ten communities were ordered into a logical successional sequence. However, the model needs to be modified to account for succession in the aquatic environment. Based on the findings of this thesis, a number of suggestions were made for the effective management of the wetland habitats on Goss Moor. These include: evaluation of willow scrub before removal so those areas of vegetation subsequently opened-up can be monitored; and the creation of new ponds to encourage the growth of certain poor-fen communities, which are species-rich, but only account for a small area of the whole resource.

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15

Bevington, Azure E. „Environmental Factors and Typha spp Dominance in Created Wetlands“. W&M ScholarWorks, 2007. http://www.vims.edu/library/Theses/Bevington07.pdf.

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16

Yung, Sonja Burns. „Measurement of sediment oxygen demand in a created urban wetland“. Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08222009-040211/.

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17

Soule, Ann Catherine. „Deficiencies in wetland project planning, review and implementation“. Thesis, The University of Arizona, 1990. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1990_637_sip1_w.pdf&type=application/pdf.

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18

Conran, Leigh Garde. „Establishment vegetation patterns in an artificial urban wetland as a basis for management“. Title page, contents and abstract only, 1991. http://web4.library.adelaide.edu.au/theses/09ENV/09envc754.pdf.

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19

Grundling, Althea Theresa. „Evaluation of remote sensing sensors for monitoring of rehabilitated wetlands“. Diss., Prtoria: [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-05132005-145705/.

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20

Misiti, Teresa Marie. „Groundwater nitrate reduction in a simulated free water surface wetland system“. Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31847.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2010.
Committee Member: Pavlostathis, Spyros; Committee Member: Spain, Jim; Committee Member: Tezel, Ulas. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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21

Hunter, Sally Ann. „Habitat classification with reference to flooding and salinity, to assist with the vegetation of a saline artificial wetland /“. Title page, table of contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09ENV/09envh947.pdf.

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22

Begum, Fatema. „Mangrove wetlands in Bangladesh /“. Title page, table of contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09ENV/09envb418.pdf.

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23

Steinman, Alexis. „Assessment of Wetland Water Quality and Plant Species Composition across the Rural, Peri-Urban, and Urban Gradient“. Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28381.

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The Prairie Pothole Region, specifically eastern North Dakota, has experienced intense disturbance from agricultural demands and urban sprawl. This study assessed wetlands across the rural, peri-urban, and urban gradient to determine the impacts of urbanization on water quality and vegetation composition. Thirty wetlands were randomly selected and compared based on land use type and the impervious to pervious surface ratio within one mile of each wetland. Water quality samples were taken in 2015 and 2016, and a vegetation assessment was completed at all wetlands. Results indicate disturbance from urbanization impacts wetland water quality and vegetation composition. Rural wetland water quality and vegetation significantly differ from both peri-urban and urban wetlands, whereas peri-urban and urban wetland water quality and vegetation do not differ. Information from this study is useful to wetland professionals across the globe as urban development and sprawl continue to impact wetlands.

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24

Newton, Rachel E. „A floristic inventory of selected Bureau of Land Management wetlands in Wyoming“. Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1663116391&sid=2&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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25

Shidisky, Joseph G. „Diversity among plant species in an emergent wetland an initial survey of the Landingville Marsh /“. Instructions for remote access. Click here to access this electronic resource. Access available to Kutztown University faculty, staff, and students only, 1997. http://www.kutztown.edu/library/services/remote_access.asp.

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Thesis (M. Ed.)--Kutztown University of Pennsylvania, 1997.
Source: Masters Abstracts International, Volume: 45-06, page: 3071. Typescript. Abstract precedes thesis as preliminary leaves [1-2]. Includes bibliographical references (leaves 76-79).

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26

Ludwig, Raymond Francis. „Variability and Drivers of Forest Communities at the Great Dismal Swamp“. Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84343.

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The Great Dismal Swamp (GDS) is a forested peatland located in the Atlantic Coastal Plain. Once a mosaic of wetland communities, disturbances (e.g., timber harvesting and ditching) have resulted in altered hydrologic regime, homogenized forest communities, and increased peat subsidence. In response, hydrologic restoration and forest management aim to enhance community composition and function. To help inform these efforts, we investigated variability and drivers of forest communities by surveying vegetation composition and structure, hydrologic indicators, and soil properties at 79 monitoring plots across GDS. Data were augmented with modeled water levels and peat depths. Our results demonstrate red maple (Acer rubrum) dominance across GDS, which decreases tree density, richness, and diversity. However, hierarchical cluster analysis identified four community types: Gum (G), Maple-Gum (M-G), Sweetgum-Maple (SG-M), and Maple (M). These communities differed in tree composition and structure; differences in other growth forms (shrubs, herbaceous, and regeneration) were limited. Modeled water levels failed to explain vegetation differences, but community associations with soil properties suggest that communities exist along a hydrologic gradient. Specifically, the G community likely exists on wetter sites whereas SG-M communities occur at drier locations. Maple-dominated communities (M and M-G; 78% of plots) likely occur across broader hydrologic gradients, explaining their dominance. However, more characterization of hydrology (i.e., time-varying water levels and soil moisture) and other drivers (e.g., site history and soil hydraulics) is needed to further explain community variation. As such, we propose future strategies for long-term monitoring to inform ongoing hydrologic restoration and forest management efforts.
Master of Science

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27

Porej, Deni. „Faunal aspects of wetland creation and restoration“. Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1078327758.

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Thesis (Ph. D)--Ohio State University, 2004.
Title from first page of PDF file. Document formatted into pages; contains xii, 120 p.; also includes graphics. Available online via OhioLINK's ETD Center.

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Whelchel, Adam W. „Hydrogeomorphic wetland assessment model for slope wetlands in the Mid-Atlantic Piedmont“. Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 461 p, 2006. http://proquest.umi.com/pqdweb?did=1068254131&sid=4&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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29

Wennerholm, Malin. „The role of wetland advisors in the implementation of wetlands in Sweden“. Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445372.

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Wetlands are commonly known for providing a number of key functions. In the context of Swedish agricultural landscapes, the ability of wetlands to enhance nutrient retention and provide habitats for biodiversity has long been recognized. Nevertheless, many wetlands in Sweden have been lost or damaged due to drainage activities, and there is a need for scaling up the implementation of wetlands. The possibilities to reach wetland implementation goals in Sweden highly depend on voluntary participation by farmers and landowners. In order to enable and encourage landowners and managers to create and manage wetlands, the access to information, support and advice is considered to be vital. One way to provide support is through farm advisory services, such as the project ‘Greppa Näringen’ (GN) in Sweden, in which advice on, among other things, wetland creation and maintenance is offered. However, to date there is relatively little research on how such advisory systems work in practice and what potential barriers there are to their success. This thesis aims at investigating how wetland advisors perceive their role in enabling and encouraging landowners in wetland implementation. It also aims at revealing what barriers the advisors experience and what potential improvements they believe are necessary in order to aid them in their mission and, in turn, promote wetland implementation. This is achieved by conducting semi-structured interviews with 14 wetland advisors within GN. The findings are then analyzed in relation to ideas on knowledge, motivation, dialogue, mutual learning and trust, which previous scholars have identified as key components in the interaction between advisors and farmers. The results show that the wetland advisors draw and refine their knowledge from an array of sources, such as written articles and reports, interaction with other stakeholders, and personal experience of wetland creation and maintenance. Moreover, in their mission to enable and encourage landowners and managers in wetland creation and management, the wetland advisors are required to consider a number of aspects, including landowners’ interests, opportunities for financial support, and environmental conditions. The establishment of relationships between advisors and landowners is of utmost importance, in which dialogue, respect, mutual learning and trust are key components. Furthermore, the study reveals a number of barriers and potential improvements. These regard the need for a longer support-chain, less complex and more reliable systems for financial support, more coherent administrative processing of notifications and permits, and more knowledge and experience on handling opposing interests. It is also vital to further acknowledge wetland functions beyond the current focus on nutrient retention in both financial support systems, research and focus areas within the advisory system of GN, and, finally, to further communicate the opportunity to receive wetland advice both within and beyond GN. This could aid advisors in their mission to transfer knowledge to landowners as well as heighten the quality of the advisory visits, and in turn motivate more landowners and farmers to participate in the implementation of long-term sustainable wetlands in Sweden.

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30

Palmer, Huckleberry Richardson. „High rates of ammonia removal in constructed treatment wetland mesocosms using oxygenation“. Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Spring2008/h_palmer_042508.pdf.

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31

Sullivan, Rodney Thomas. „Haberek wetland creation“. Virtual Press, 1992. http://liblink.bsu.edu/uhtbin/catkey/835836.

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Wetlands in the United States have been decreasing in number from the time European settlers began draining them for agricultural purposes to the present. Wetlands serve many important ecological functions such as waterfowl habitat.The purpose of this project was to investigate wetland creation literature in order to develop a process which could be applied to a particular site to attract waterfowl. The topics reviewed for this project were goal setting, for wetland creations, wetland creation methodologies and waterfowl habitat criteria. The major portion of the project was devoted to the construction process of the wetland. The criteria used to direct the wetland construction were hydrology, topographic contour design, revegetation, and protective buffers. Trail development to provide public access for educational purposes was also an important component of the wetland design. Waterfowl habitat criteria was also researched and applied to the project in order it insure that waterfowl would be attracted to the wetland.The process developed from the research was applied to Jim Haberek's property located in Anderson, Indiana. The product was a masterplan which included a site analysis, a water level management plan, a contour design, a revegetation plan, protective buffers and a trail design for the public.
Department of Landscape Architecture

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32

Bailey, David E. „Wetland Vegetation Dynamics and Ecosystem Gas Exchange in Response to Organic Matter Loading Rates“. W&M ScholarWorks, 2006. http://www.vims.edu/library/Theses/Bailey06.pdf.

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33

Clouston, Elizabeth, und n/a. „Linking the Ecological and Economic Values of Wetlands: A Case Study of the Wetlands of Moreton Bay“. Griffith University. Australian School of Environmental Studies, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030828.140330.

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This thesis examines the relationship between the underlying ecological values of wetlands and the economic values they produce. The importance of the roles that wetlands play is now well recognised yet losses continue at a global level. It is argued that one cause of wetland loss is a lack of awareness of the values of these systems due to inadequate information of the nexus between ecological functions and economic values. For example, the off-site, indirect benefits provided by wetlands have largely been ignored. This has led to an undervaluation of these ecosystems. The integration of ecological and economic values requires incorporating differing types of information and systems of value derived from differing disciplines with differing paradigms. To understand the differing disciplinary perspectives the thesis explores the ecological functions of wetlands and the economic goods and services that they provide. The functions and benefits of wetlands are linked at the ecological-economic interface. A consensus on the definition of ecological value could not be discerned within the discipline of ecology. Thus, a definition and index of ecological value is developed to demonstrate the attributes of coastal and wetland systems that provide for instrumental human benefits. These attributes include productivity, the ability to provide habitats for dependent species and the diversity of species and organisation they support. However, ecological information is not presently available to operationalise the index. The ability of economic techniques to capture this ecological value is then investigated. Three approaches for assessing non-market values (direct linkage models, revealed preference and stated preference models) are reviewed with respect to their ability to capture ecological value. An alternative biophysical approach, namely energy analysis, is also considered. The review suggests that it may be possible to measure ecological value using the contingent valuation method. The role of information in preference formation and willingness to pay bids is then investigated along with a number of other issues that need to be resolved before using the contingent valuation method. The wetlands of the case study area, Moreton Bay, Australia exhibit both ecological and economic values. The wetlands contribute approximately one-third of primary productivity in the Bay, provide habitat for a wide range of dependent species (including internationally recognised migratory wader birds) and have a diverse fauna with a relatively large number of endemic species. Economic values of the wetlands include both direct and indirect use values (for example, fishing, recreation, water quality improvements and storm buffering) and non-use values. Non-use values include the value in preserving the environment for future generations (bequest value) and the existence of vulnerable animals such as turtles and dugongs, which one may never expect to see. If consumers are willing to pay to preserve these animals, this is also a valid economic value. The economic technique of contingent valuation is tested to determine if it is possible to capture ecological value by providing respondents, selected by random sample, to a survey with the relevant information. A case study is undertaken in Moreton Bay to determine respondents' willingness to pay to improve water quality and hence protect the wetlands. To test the effects of differing types information, four different versions of the survey were sent to four groups of 500 respondents. Case A provided no extra information so it could be used as a control. Case B included information about the ecological values of the wetlands of Moreton Bay. Case C provided information about the economic use values of the wetlands in the Bay including direct and indirect use. Case D provided information about the non-use values of endangered species resident in the Bay that are dependent on the wetlands. The results indicate that the provision of different types of information influences willingness to pay. However, willingness to pay when provided with ecological information is not significantly different from willingness to pay when provided with other information. As it was not possible from the research undertaken to state that the contingent valuation method can capture ecological value, an alternative approach is proposed to link ecological and economic values. It is argued that ecologists and economists need to develop common aims and scales of assessment. Further, communication between the two disciplines can be enhanced through the use of agreed indicator terms. Through an iterative approach it should then be possible to understand the linkages between changes in indicators of ecosystem values and indicators of economic value.

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34

Clouston, Elizabeth. „Linking the Ecological and Economic Values of Wetlands: A Case Study of the Wetlands of Moreton Bay“. Thesis, Griffith University, 2003. http://hdl.handle.net/10072/366973.

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Three approaches for assessing non-market values (direct linkage models, revealed preference and stated preference models) are reviewed with respect to their ability to capture ecological value. An alternative biophysical approach, namely energy analysis, is also considered. The review suggests that it may be possible to measure ecological value using the contingent valuation method. The role of information in preference formation and willingness to pay bids is then investigated along with a number of other issues that need to be resolved before using the contingent valuation method. The wetlands of the case study area, Moreton Bay, Australia exhibit both ecological and economic values. The wetlands contribute approximately one-third of primary productivity in the Bay, provide habitat for a wide range of dependent species (including internationally recognised migratory wader birds) and have a diverse fauna with a relatively large number of endemic species. Economic values of the wetlands include both direct and indirect use values (for example, fishing, recreation, water quality improvements and storm buffering) and non-use values. Non-use values include the value in preserving the environment for future generations (bequest value) and the existence of vulnerable animals such as turtles and dugongs, which one may never expect to see. If consumers are willing to pay to preserve these animals, this is also a valid economic value. The economic technique of contingent valuation is tested to determine if it is possible to capture ecological value by providing respondents, selected by random sample, to a survey with the relevant information. A case study is undertaken in Moreton Bay to determine respondents' willingness to pay to improve water quality and hence protect the wetlands. To test the effects of differing types information, four different versions of the survey were sent to four groups of 500 respondents. Case A provided no extra information so it could be used as a control. Case B included information about the ecological values of the wetlands of Moreton Bay. Case C provided information about the economic use values of the wetlands in the Bay including direct and indirect use. Case D provided information about the non-use values of endangered species resident in the Bay that are dependent on the wetlands. The results indicate that the provision of different types of information influences willingness to pay. However, willingness to pay when provided with ecological information is not significantly different from willingness to pay when provided with other information. As it was not possible from the research undertaken to state that the contingent valuation method can capture ecological value, an alternative approach is proposed to link ecological and economic values. It is argued that ecologists and economists need to develop common aims and scales of assessment. Further, communication between the two disciplines can be enhanced through the use of agreed indicator terms. Through an iterative approach it should then be possible to understand the linkages between changes in indicators of ecosystem values and indicators of economic value.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
Full Text

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35

Tschirky, Paul A. „Waves and wetlands, an investigation of wave attenuation by emergent, freshwater, wetland vegetation“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ56104.pdf.

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36

Richardson, J., Phillip R. Scheuerman und M. Benton. „Biosurvey of a Constructed Wetland Using a Newly Developed Treatment Wetlands Evaluation Index“. Digital Commons @ East Tennessee State University, 1996. https://dc.etsu.edu/etsu-works/2912.

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37

Lancaster, Nicole N. M. „Effects of salinity on biogeochemical processes and methylmercury production in freshwater wetland sediments“. View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-3//r1/lancastern/nicolelancaster.pdf.

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38

Backlund, Cecilia. „Förslag till kväverening i Forsåsystemet genom våtmarksetablering“. Thesis, Södertörns högskola, Institutionen för livsvetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-15267.

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The last hundred years humans have drastically changed the amount of available nitrogen in nature. Today human activities release twice as much available nitrogen as all natural processes are doing together. We also have degraded nature´s possibilities to take care of nitrogen through the draining of wetlands and straightening of rivers. In order to regain the potential of nitrogen retention in the water systems there now requires a reshape of the landscape we live in. A planned expansion of the mining activities in Garpenberg, Dalarna, would double the content of nitrogen in the waters below the mine. Water that already contains a high amount of nitrogen. To reduce the risk of eutrophication and increased pressure on the content of oxygen in the watercourses, in this study I investigate where a wetland with refine of nitrogen as a purpose can be located and constructed in the system of Forsån. By topographic studies one appropriate area where the river of Garpenberg flows past Krommetsbo is found. The potential of the area is supported by an inventory of species which are likely to colonize the wetland. The Krommetsbo-wetland will be able to contribute to the reduction of nitrogen in the lower parts of the system. However, additional measures are needed to change the situation in the upper parts of the system.

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Polifka, Jonas. „Evaluating the relative importance of stormwater for nutrient and metal contamination to the urban, groundwater dependent Yellagonga Wetlands, through wetland budgeting“. Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2021. https://ro.ecu.edu.au/theses/2478.

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Wetlands provide numerous ecosystem services and can be utilised as pollutant sinks, however excessive contamination of wetlands can induce adverse effects to wetland ecology and lead to degradation of its values. Runoff from precipitation mobilizes contaminants from impervious surfaces which are, in some case, transported directly to wetlands through stormwater drainage. Urban stormwater can be a significant source of contaminants to wetlands, although its overall importance needs to be assessed for each wetland individually. Wetland budgeting is a management tool used to evaluate the relative importance of contaminant sources to wetlands, by comparing contaminant loads. Environmental management of the Yellagonga Wetlands, a chain of groundwater-dependent wetlands located in southwest Western Australia, has previously focused on limiting stormwater flow to the wetland park, to minimise contaminant inputs. While this management approach was based on the notion that relatively high contaminant concentrations measured in stormwater represented high loading, this assumption was not formally verified. The broad aim of this research was to evaluate the relative importance of stormwater supplied by all major sources (atmosphere as well as surface-, ground-, and stormwater) of the Yellagonga Wetlands (Lake Joondalup, Wallubuenup Swamp and Beenyup Swamp). This broad aim was achieved by comparing annual input loads of total and dissolved nutrients (N, P) and metals (Al, Cr, Co, Cu, Cd, Hg, U, and Zn)., The study also analysed stormwater for pharmaceuticals to assess whether stormwater transports other harmful substances to the wetlands. A mixture of existing data from a variety of sources was combined with original data to calculate input loads. Specifically, surface water (quantity), atmospheric fallout (quality), and stormwater drainage (quality and quantity) were determined by this study, while the remaining components were derived externally. Budgeting indicated that atmospheric fallout contributed the overall highest masses of contaminants to the wetlands, followed by groundwater and surface water while stormwater was overall least important. These results suggest that continued management focus on the reduction of contaminant loads from stormwater may not significantly impact water quality of the wetlands, however targeting of air quality and groundwater could be beneficial for their ecological health and functionality. Contrary to common belief, the results also indicate that the excess of filterable reactive phosphorus (FRP) entering the southern section of Lake Joondalup was derived from Wallubuenup Swamp, rather than Beenyup Swamp. This finding may advance the FRP source investigation and could help lowering the chances of eutrophication and algal blooms at Lake Joondalup.

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Atkinson, Robert B. „An analysis of palustrine forested wetland compensation effectiveness in Virginia“. Diss., Virginia Tech, 1991. http://hdl.handle.net/10919/39970.

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Plans to construct a wetland to replace wetland losses has become a common feature of permit requests. The purpose of this project is to suggest a methodology for quantifying the effectiveness of palustrine forested wetland construction in Virginia. Wetlands constructed by ~ne Virginia Department of Transportation and the U.S. Army Corps of Engineers were surveyed and Wagner Road constructed wetland in Petersburg, Virginia was selected as the primary study site. Chapter One of the present study suggests a method for early assessment of revegetation success utilizing weighted averages of colonizing vegetation. An adjacent reference site was chosen that was in close proximity to the constructed site and was used for comparison. Results from the Wagner Road site and the reference wetland indicated that colonizing vegetation weighted averages provide a more sensitive measure of revegetation success than the methods described in the federal wetland delineation manual.
Ph. D.

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Fink, Daniel Francis. „Effects of a pulsing hydroperiod on a created riparian river diversion wetland“. Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1167401886.

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42

Rodriguez, Ruth. „Nutrient dynamics in a created desert wetland implications for the Rio Bosque Wetlands Park /“. To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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43

Alipiah, Roseliza Mat. „Valuation of ecosystem services for wetland management : case study of Setiu Wetlands, Terengganu, Malaysia“. Thesis, University of York, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.583335.

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This research is a new approach as it integrates information from both environmental and social sciences to inform effective management of the wetlands. A three-stage research framework was developed. Firstly, a Bayesian Belief Network (BBN) was used to predict the probability of anthropogenic activities affecting the delivery of different key wetland ecosystem services under different management scenarios. Secondly, Choice Experiments (CEs) were used to quantify the relative preferences which key wetland stakeholder groups held for delivery of different levels of these key ecosystem services. Thirdly, a Multi- Criteria Decision Analysis (MCDA) was applied to produce an ordinal ranking of the alternative management scenarios accounting for their impacts upon ecosystem service delivery as perceived through the preferences of the key stakeholder groups. This integrated ecosystem management approach was applied to a wetland ecosystem in Setiu, Terengganu, Malaysia which currently supports a significant level of aquaculture activities. This research has produced clear guidelines to inform policy makers considering alternative wetland management scenarios: Intensive Aquaculture, Conservation or Ecotourism, in addition to the Status Quo. The findings of this research are as follows. The BBN revealed that current aquaculture activity is likely to have significant impacts on water column nutrient enrichment, but trivial impacts on caged fish biomass, especially under the Intensive Aquaculture scenario. Secondly, the best .. fitting CE models identified several stakeholder sub-groups, each with distinct sets of preferences for the delivery of key ecosystem services. Thirdly the MCDA identified Conservation as the most desirable scenario overall based on ordinal ranking in the eyes of most of the stakeholder sub-groups. Ecotourism and Status Quo scenarios were the next most preferred and Intensive Aquaculture was the least desirable scenario. The methodologies developed through this research provide an opportunity for improving planning and decision making processes that aim to deliver sustainable management of wetland ecosystems in Malaysia.

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Bailey, Jennifer Diane. „Vertical Distribution of Wetland Plant Roots and Their Associated Bacteria in Groundwater-fed Wetlands“. Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1452708738.

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45

練偉東 und Wai-tung Lin. „Created wetlands in Shing Mun River, Sha Tin“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31980752.

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Newbold, Stephen Carlisle. „Targeting conservation activities : cost-effective wetlands restoration in the Central Valley of California /“. For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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Thesis (Ph. D.)--University of California, Davis, 2002.
Degree granted in Ecology. Includes bibliographical references (leaves189-199). Also available via the World Wide Web. (Restricted to UC campuses)

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Hoa, Vu Minh, und n/a. „Mosquito habitats and predation efficiency on mosquito populations in Ginninderra Wetland, Canberra, Australia“. University of Canberra. Resource & Environmental Science, 1993. http://erl.canberra.edu.au./public/adt-AUC20060725.115344.

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The ecology of mosquito populations in relation to weather conditions, emergent plants and predation in an urban wetland of Canberra was studied. Anopheles annulipes, Aedes notoscriptus, Aedes australicus, Aedes alboannulata, Culex annulirostris and Culex quinquefasciatus were found. Temperature was a major climatic factor in determining the abundance of mosquito populations in the wetland. First collections and subsequent development of mosquitoes in Ginninderra wetland are likely to depend on local weather conditions each year. The wetland proper was not a suitable habitat for mosquito breeding. Tall emergent vegetation may have obstructed oviposition and predation was also important in limiting colonization by mosquitoes. Instead, isolated temporary waterbodies which were free of predators, such as ground depressions, tyre tracks, domestic waste containers, were the most important habitats for mosquitoes adjacent to the Ginninderra wetland. Field experiments found that predation of mosquito larvae by mosquitofish Gambusia qffinis and notonectids Anisops was more efficient in sunlight than shade and this was affected by the height of emergent plants.

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Mekiso, Feleke Abiyo. „Hydrological proceses, chemical variability, and multiple isotopestracing of water flow paths in the Kudumela Wetland- Limpopo Province, South Africa“. Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1006153.

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The hydrology of the Kudumela Wetland, Limpopo Province of South Africa was studied from November 2005 to April 2007, involving both fieldwork and laboratory analyses. This study presents the results of an investigation of the hydrology of the Kudumela Wetland in South Africa, and its contribution to dry season flow in the Mohlapitsi and Olifants Rivers. Initially, 40 Piezometers were installed along seven transects and water levels monitored in order to understand water table level characteristics (fluctuations) with time. Water levels in transects one, three, the right bank portion of transect four and transect six showed fluctuations. Transect two, the left bank portion of transect four and transect five did not show significant temporal changes. The relationships between piezometer water levels, rainfall in the study area and stream flow observed at a river gauging station are not clear. The river within the wetland is a gaining stream because the water table level elevation is above that of the river. This indicates that the wetland is feeding the river. The northern part of the wetland (T1 and T2) is affected by artificial drains and most of the piezometers closest to the river channel showed the lowest variations. The relationships between rainfall, groundwater, and surface water at this site shows that stream flow did not respond quickly to precipitation as expected, even in months when rainfall increased (for example, 74 and 103mm during 08/02/06 and 18/02/06 respectively), and the groundwater levels did not show fluctuations, indicating that groundwater responds gradually to precipitation, and that the relationship between rainfall, groundwater and surface water is complex. The environmental stable isotopes (deuterium and oxygen-18) and the radioactive isotope (tritium) were analyzed, along with field observations of electrical conductivity (EC), pH, total alkalinity (Talka) and some major and minor dissolved ion analyses for tracing water dynamics in the study area. A total of 39 water samples was taken and analyzed from boreholes, auger holes, right bank and left bank drains, various points along the river and springs in four sampling visits to the wetland. The results did not clearly provide a temporal record of isotope and chemical variations in the various sources. Results from the most extensive sampling survey in April 2007 provide the most comprehensive overview of hydrological relationships. Clustering of the stable isotope data suggests that the water samples of upstream and downstream river, auger holes further south and most drains clustered together suggesting a common water source and almost all samples fall above the global (GMWL) and local (Pretoria MWL) meteoric water lines, while some fall between the global and Pretoria meteoric water lines. Six representative water samples were analyzed for major ion concentration. Both cation (Ca, Mg, K, and Na) and anion (HCO3, SO4, Cl, and NO3) analyses in November 2007 confirmed conclusions reached from field observations. The analysis shows that a single type of water (Ca, Mg-HCO3) is involved in the study area. In almost all major ion plots, the right bank drains, upstream river and downstream river samples grouped together in a single cluster. As the means for reliable river flow measurements were not available, except for the gauging station at the outlet of the valley, rough, semi-quantitative estimates were made during several field visits. These, suggest considerable losses of river flow into the gravel/boulder beds at and below a gabion dam at the head of the valley. Three major and several other left bank springs and right bank drains at transects T1 and T2 contributed to the river flow at all times. Along with the isotopic and chemical evidence, these observations have lead to a hypothesis that river water enters the wetland and flows back to the Mohlapitsi River through boulder beds underlying the wetland and through drains on the surface of the argillaceous aquitard covering the more conductive boulder beds. Deeper dolomitic groundwater does not appear to contribute to the water balance at least in the northern half of the wetland. Although environmental isotope and hydrochemistry results may not unequivocally prove this hypothesis they do not contradict it.

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Porter, Abigail M. „Wetlands in the Urban Landscape: The Process of Wetlands Restoration in Baltimore, Maryland and Paris, France“. Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1058301973.

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50

Jenkins, Matthew Lee. „Wetland Delineation and Section 404/401 Permitting: An Internship with Carolina Wetland Services“. Oxford, Ohio : Miami University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1150754893.

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Dissertationen zum Thema „Wetland“

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