Dissertations / Theses on the topic 'Estuarine wetland'
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Thatcher, Lisa A. "Carbon remineralization and storage in estuarine wetland sediments /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/thatcherl/lisathatcher.pdf.
Full textWinning, Geoffrey Bruce, and res cand@acu edu au. "Vegetation Changes in a Large Estuarine Wetland Subsequent to Construction of Floodgates: Hexham Swamp in the Lower Hunter Valley, New South Wales." Australian Catholic University. School of Arts and Sciences, 2006. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp107.11092006.
Full textOlsen, Kate Lisbeth. "Assemblage and diet of native and non-native nearshore fishes in a restoring wetland in the northern Sacramento-San Joaquin Delta, California." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/k_olsen_121409.pdf.
Full textTitle from PDF title page (viewed on Feb. 18, 2010). "School of Earth and Environmental Science." Includes bibliographical references (p. 24-29).
Fruchter, Jesse. "DO LARGE, INFREQUENT DISTURBANCES RELEASE ESTUARINE WETLANDS FROM COASTAL SQUEEZING?" OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/923.
Full textTaylor, Christina Claudette. "A geographic information system (GIS) based determination of estuarine and marine wetland and shoreline changes in the Galveston Bay estuary from 1995 to 2002." Texas A&M University, 2008. http://hdl.handle.net/1969.1/85966.
Full textHerman, Julie D. "Sediment budgets, estuarine sediment loads, and wetland sediment storage at watershed scales, York River watershed, Virginia." W&M ScholarWorks, 2001. https://scholarworks.wm.edu/etd/1539616693.
Full textKidd, Sarah Ann. "Ecosystem Recovery in Estuarine Wetlands of the Columbia River Estuary." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3637.
Full textSchindler, Jennifer. "Estuarine Dynamics as a Function of Barrier Island Transgression and Wetland Loss: Understanding the Transport and Exchange Processes." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1260.
Full textWijekoon, Nishanthi. "SPATIAL AND TEMPORAL VARIABILITY OF SURFACE COVER IN AN ESTUARINE ECOSYSTEM FROM SATELLITE IMAGERY AND FIELD OBSERVATIONS." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1194621824.
Full textBruder, Brittany Lynn. "Assessing hydrokinetic tidal energy extraction for Rose Dhu Island, Georgia: A case study for tidal rivers with marsh environs." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53864.
Full textNondoda, Sibulele Phefumlela. "Macrophyte distribution and responses to drought in the St Lucia Estuary." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1012330.
Full textWilton, Kylee Margaret, and 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.
Full textSandy, Alexis Emily. "Environmental and Digital Data Analysis of the National Wetlands Inventory (NWI) Landscape Position Classification System." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33572.
Full textMaster of Science
Kigigha, Lovet T. "Bioremediation potential of estuarine biofilms on oil polluted wetlands." Thesis, University of Essex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422238.
Full textYa, Chao. "Sources, Fate and Transformation of Organic Matter in Wetlands and Estuaries." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1581.
Full textDiefenderfer, Heida Lin. "Channel morphology and restoration of Sitka spruce (Picea stichensis) tidal forested wetlands, Columbia River, U.S.A. /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/5565.
Full textMarkus-Michalczyk, Heike [Verfasser], and Kai [Akademischer Betreuer] Jensen. "Willows in Tidal Wetlands in Times of Climate Change : Ecological Niches in Estuarine Environments / Heike Markus-Michalczyk. Betreuer: Kai Jensen." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1052996647/34.
Full textBooys, Ernest Jacobus. "An assessment of the adequacy of the present legal regime for the conservation of wetlands and estuaries in South Africa." Thesis, University of Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5640_1366182231.
Full textVery little protection has been afforded to wetlands1 and estuaries within the South African legislative framework.2 These ecosystems are extremely important and valuable to mankind, the flora and fauna.3 The continued destruction of wetlands and estuaries is the most heinous act of environmental vandalism on a worldwide scale today.4 Wetland and estuarine loss has been accelerated and extended by human activities such as mining,5 urbanisation,6 drainage, river diversion,7 groundwater abstraction as well as climate change.8 Time is running out for so many critically important sites and for the world at large.9 Without wetlands and estuaries the biosphere10 cannot continue to do its essential work.11 Despite, the importance of a range of resources and services12 which wetlands and estuaries provide, these have been taken for granted by humans.13 As a result hereof, the maintenance of wetlands and estuaries has received low priority in many countries.14 This is further precipitated by the lack of interest and ignorance which result in the conversion of wetlands and estuaries into man-made structures.15 Research has shown that the lack of information and the awareness of the importance of these ecosystems has the made the conservation legislation for these ecosystems a toothless dragon.16 People are becoming increasingly aware17 of the loss of wetlands and estuaries, once in abundance and now merely shadows of their former nature.18 To investigate this lack of protection, the starting point would be the global level.
Abrantes, Kátya Gisela dos Santos. "Trophic structure and the importance of terrestrial wetland producers for aquatic food webs in tropical Australian estuaries /." 2008. http://eprints.jcu.edu.au/1989.
Full textHwang, Gwo-Wen, and 黃國文. "Adaptive management on the wintering habitat of common teals (Anas crecca) in Hwajiang estuarine wetland." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/51191028862737275232.
Full text國立臺灣大學
土木工程學研究所
100
This study aimed at constructing an adaptive management model for wintering habitat of Common Teal (Anas crecca) in Hwajiang Wetland. A habitat suitability index (HSI) was developed to quantify the physical environments of the Teals’ preferred habitat. The Hwajiang wetland is an important wintering site for migratory Common Teal, whose population has dramatically declined in recent years, due most likely to the persistent degradation of habitats in this wetland. Due to river morphology, the changes of sediment deposition and vegetation expansion, have reduced the available habitat for the wintering Teal. Therefore, the rehabilitation of the Teals’ habitat is urgently needed for a sustainable management in this wetland. Point-count surveys of the Common Teal were conducted at a tidal pool, an inner channel and a tidal creek in Hwajiang Wetland and Teals’ positions were recorded from October 2008 to March 2009. Twenty-two sets of data and 3615 counted individuals were collected. Three habitat variables, including slope, elevation and the distance to the nearest vegetation, were displayed on 5 m × 5 m grid cells and analyzed with GIS software. Suitability index (SI) values of habitat variables were determined using the envelop curve of maximum abundance of common teals versus the habitat variables. The results showed that Common Teal preferred habitats with gentle slopes, median elevations and areas close to vegetation. The abundance of the Common Teal was highest in the grid cells with slopes ranging from 0.7 to 1.4%, bed elevation varying from 0.3 to 0.7 m above the mean sea level, and distance to the nearest vegetation shorter than 4 m. The HSI model was constructed by calculating the minimum value of the three SIs, and the suitability map of wintering common teals was generated to represent an integrated map of habitat quality in the area. A simple regression analysis indicated that the HSI model is a reliable indicator as the maximum numbers of the Common Teal in each grid cell increased significantly with the HSI values. Four types of habitat conditions, poor, fair, good and excellent, were determined based on the HSI values. The proportions of excellent habitat were 41.9%, 17.4% and 26.4% in the tidal pool, the inner channel and the tidal creek, respectively. A principle of rehabilitation was derived from the HSI model, with slopes smaller than 1.5%, elevations between 0.0m and 0.5m, and distance of less 25 m to the nearest vegetation. The rehabilitation area should be larger than 100 m in width and 250 m in length and adjacent to the existing Teal habitat. Three rehabilitation scenarios were simulated and characterized based on field survey and the HSI model. In addition, a horizontal two dimension numerical model, CCHE2D, was employed to simulate bank-full flow characteristics such as water surface elevation, flow velocity, shear stress and so on. The bathymetry and vegetation cover were assumed the same while the location was different. The shear stress evaluation indicated that the rehabilitation of the most upstream location is the best scenario because it has the lowest sediment deposition rate and represents a minimum maintenance effort needed in the future. This study provided a foundation for determining potential habitats and information on how to mitigate a degraded wetland for the Common Teal. It encompassed the aspects of monitoring, evaluation, and decision making that would benefit future management plans directed toward the Common Teal and other waterfowl species in Taiwan. It also provided an adaptive management model for application to similar projects of wetland rehabilitation and sustainable management.
Fang, Yung-Yu, and 方詠俞. "Relationship between Seasonal Variations of Water Quality and Greenhouse Gas Emission for Estuarine Tidal Wetland Park-A Case Study of Yuanchungan Wetland Park." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/754v8r.
Full text國立中山大學
海洋環境及工程學系研究所
107
The wetlands ecosystem plays an important role on providing us with water and human health, supporting rich biodiversity and climate change, and storing more carbon than any other ecosystem. Because of this, the wetlands ecosystem has gradually been valued. Due to the increase of economic development, the area of wetland is lost faster and faster. Kaohsiung city promoted the concept of ecological corridors in 2003, and Yuanchungan wetland park was defined as one of the “West Kaohsiung Wetland Ecological Corridors” by Kaohsiung city government. The research site of this study is located in Yuanchungan wetland park. The wetland park is a compensatory wetland ecological habitat for restoration, and is the largest wetland in wetland ecological corridors of Kaohsiung, which is located on the south side of the Dian-Boa-Chi to the sea. In this study, the sampling dates were from August 2017 to March 2018 during four seasons for five sampling points. Based on the study, it could be comprehended that the variations of season, day and night, and differences in different habitats by water quality test and meteorological data collection. Through the water quality and stat is tidal analyses from SPSS, the correlation between the emission of greenhouse gases and water quality were analyzed. According to the analytical results, water temperature, pH, and dissolved oxygen were higher during the day than the night. Electrical conductivity and salinity were shown to be highly correlated with tides variation. Phosphate nutrients have the highest concentration is summer and autumn. The reason might be because orthophosphate was less absorbed by plants in the water in summer and autumn, while the effect of tidal current on the wetland sampling point making sediment disturbed to let orthophosphate in the sediment released into the water. For nitrite and nitrate in nitrogen-abundant nutrient salt, they have a similar concentration trend in summer and autumn, both of which presented high levels in the daytime and low levels in the nighttime because ammonia nitrogen in the salt was first oxidized to nitrite before it was further nitrified on nitrate. Ammonia nitrogen exhibited the highest concentration in spring. It might be because the condition because excessive as the most optimal environment for nitrifying bacteria in the wetland existing the reduced capability to remove ammonia nitrogen resulting in such accumulation. The correlation between greenhouse gas and water quality revealed that CO2 concentration was also highly correlated to the total organic carbon and chlorophyll a. It is speculated that this is probably due to the process of photosynthesis by plants in the wetland (including aquatic and self-supporting algae). CH4 also show a strong positive relationship with nitrate and total nitrogen, suggesting that microbes will instead to turn anaerobic hydrolysis under an anaerobic environment, as nitrification can still proceed at a low oxygenated condition of 0.3 mg/L in concentration. N2O is also displaying the same strong positive correlation with nitrate and total nitrogen because of the process of denitrification.
Batho, Andrew Paul. "The use of wetland bird species as indicators of land cover change within the Mgeni Estuary and Beachwood Mangrove swamps." Thesis, 2010. http://hdl.handle.net/10413/10614.
Full textThesis (M.A.)-University of KwaZulu-Natal, Durban, 2010.
SanClements, Michael Dante. "Effects of shading by bridges on estuarine wetlands." 2003. http://www.lib.ncsu.edu/theses/available/etd-03282003-150114/unrestricted/etd.pdf.
Full textWilton, Kylee Margaret. "Coastal wetland habitat dynamics in selected New South Wales estuaries /." 2002. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp29.29082005.
Full textA thesis submitted in total fulfillment of the requirements for the degree of Doctor of Philosophy. Includes bibliographical references (305-329). Also available in an electronic version via the internet.
Yang, Wen-Bin, and 楊文彬. "Investigation on the Characteristics of GHGs Emitted from Industrial Wastewater Treatment Processes and Natural Estuarine Wetlands by In-situ Continuous Monitoring Technology." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/x85k75.
Full text國立中山大學
環境工程研究所
106
In the context of global warming and climate change, greenhouse gas (GHG) emission has received a considerable attention for the past decades. Of many natural GHG sources, wetland plays an important role in modulating the concentrations of GHGs in the atmosphere. This study aims to continuously monitor the emission of greenhouse gases (CO2, CH4, and N2O) from a constructed wetland. A self-designed dynamic floating chamber was applied to collect GHGs through a Teflon tube connected to the top of the chamber, and in-situ monitored the concentrations of GHGs with a non-dispersive infrared (NDIR) monitor to continuously measure GHG emissions, estimated its CO2 equivalent (CO2-e), and investigated the seasonal variation of GHGs. This study further correlated GHGs and water quality, and combined GHG data and net primary production data to understand GHG emission from a natural estuarine wetland and a wastewater treatment plant. The temporal variation of greenhouse gas (GHG) emission from petrochemical and integrated industry wastewater treatment plants (WWTP) was then investigated. Two approaches including an in-situ continuous monitoring and a typical grab sampling methods were further compared. The in-situ continuous monitoring method provided more detailed information regarding the temporal variation of GHG concentration. A sufficient sampling frequency (e.g., once every 6 hours) for the grab sampling method is required to effectively resolve the diurnal variation of GHG emission. This study highlights significant diurnal variation of GHG concentration in different wastewater treatment units. Only with proper and reliable sampling and analytical methods, it becomes possible to correctly identify the characteristics of GHG emissions and to develop strategies to curtail the GHG emissions from such an important source in response to regulatory measures and international treaties. This study revealed that N2O was the dominant species responsible for GHG emissions from the WWTPs and the emission factors of CH4, and N2O were higher in the equalization tank and final sedimentation tank compared to other units. We also compared the GHG emission factors of this study with other literatures, showing that the GHG emission factors were much lower than those measured in Netherlands, Australia, and IPCC, but similar to those measured in Japan. Wetland play a crucial role in modulating atmospheric concentrations of greenhouse gases (GHGs). Key factors controlling GHG emission from subtropical estuarine wetlands were investigated in this study, which continuously monitored the uptake/emission of GHGs by/from a subtropical estuarine wetland located in the Minjiang and Zhangjiang estuaries in the coastal region of southeastern China. A self-designed floating chamber was used to collect air samples on-site at three environmental habitats (P. australis, mangrove, mudflats, and river water). Based on its potential to increase global warming, N2O was the main contributor to the total GHG emission, with that emitted from the river water being the most considerable. Tidal water carried onto the marsh had its own GHG content and thus may act as a source or sink of GHGs. However, water quality had a large effect on GHG emissions from the riverwater whereas the tidal water height did not. Both high salinity and large amounts of sulfates in the wetlands explicitly inhibited the activity of CH4-producing bacteria, particularly at nighttime. This study also investigated the seasonal variation of GHG emissions and estimated their overall CO2 equivalent (CO2-e). The GHG emissions were further correlated with water quality to identify which water quality parameters dominated GHG emissions in an estuarine mangrove ecosystem. A positive correlation was found between CO2 emission and water temperature, dissolved oxygen (DO), and total phosphorus (TP) in the riverwater. CH4 emission was positively correlated with TP, DO, and NH4+-N, while N2O emission was significantly positively correlated with DO, TP, and total nitrogen (TN) in the riverwater.