Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"waterbirds"”.
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Wetland suitability for waterbirds in Illinois
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2019-02-05 without embargo terms
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Biogeography and ecology of African waterbirds
… of distribution and diversity for African waterbirds are investigated at the continental, sub-continental, ecosystem and species levels. The focal species is the Great White Pelican Pelecanus onocrotalus, one of South Africa's 'Red Data' bird species. The 'focal' ecosystem is Rondevlei Bird …
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Factors Driving Recreational Disturbance of Waterbirds on the Texas Coast
… can also negatively impact species populations. Waterbirds are most sensitive to human disturbance because of the delicate nature of coastal habitats, which waterbirds rely on. This dissertation addresses the decline in waterbird populations and efforts to reduce their disturbance in three ways. …
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A multi-scale study on the movement ecology of Afrotropical waterbirds
… which to formulate informed conservation plans. Waterbirds in semiarid southern Africa are an ideal study group for understanding interactions between movement and environmental factors because they exhibit a wide range of movement strategies and are located within a landscape in which resources …
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The role of waterbirds in the dispersal of aquatic organisms in southern Africa
… very recently has the capacity of highly mobile waterbirds to disperse aquatic organisms received similar attention in the dispersal literature. Dispersal is important for the organisation of communities, and therefore understanding the frequency and scale of waterbird-mediated dispersal provides …
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Response of Vegetation and Endangered Waterbirds to Habitat Management Techniques at Kealia Pond National Wildlife Refuge
… nesting for both species of endangered Hawai’ian waterbirds. In 2003, habitat conditions on the northern shore prevented nesting. In 2004, 32 stilt nests and 69 coot nests were found compared to no nests in previous years. Mass loss of 123 stilt and 320 coot eggs were monitored during incubation …
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Estimating Forage Production for Waterbirds and Waterbird Response to Habitat Management at Lacreek National Wildlife Refuge, South Dakota
Resource managers are often required to estimate waterfowl forage production on management units in order to meet habitat management goals. A technique was developed in Missouri to quickly estimate seed yields of common moist-soil plants consumed by a variety of waterfowl species by measuring …
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Habitat Characteristics of Refuge Wetlands and Taro Lo'I Used By Endangered Waterbirds At Hanalei National Wildlife Refuge, Hawai'i
… wetlands and taro lo’i) used by these endangered waterbirds (EWBs) as well as wetland vegetation and EWB response to moist-soil management at HNWR. Furthermore, the links are discussed between habitat conditions that occur during the taro agricultural cycle and how each stage contributed to the …
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Relationships Among Aquatic Macroinvertebrates, Endangered Waterbirds, and Macrophytes in Taro Lo'I At Hanalei National Wildlife Refuge, Kauai, Hawaii
… critical wetland habitat for five endangered waterbirds (EWBs) and supports nearly one-third of the remaining taro loi cultivated in the Hawaiian archipelago. This study focuses on the use patterns of this agricultural crop by two of these EWBs, the Hawaiian duck or koloa (Anas wyvilliana) and …
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Disturbance effects of boat-based tourism on waterbirds at the Ramsar-designated De Hoop Vlei, Western Cape, South Africa
… were performed in order to characterize the waterbirds present during the high water level conditions required for boating. Birds were concentrated in areas with aquatic vegetation and shallow water, mainly along the vlei's western shoreline and southern and northern ends. Two routes were …
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Assessing the conservation value of wetlands and waterbirds with a focus on the winter rainfall region of South Africa
… conservation importance of the wetland to waterbirds.
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Influence of Human Recreational Activities and Vegetative Characteristics on Waterbird Abundance
… may influence the occurrence and abundance of waterbirds. I investigated the possible impacts of recreational activity and vegetative characteristics on the relative abundance of waterbirds along a heavily used river, the San Marcos River, in central Texas. The abundance of waterbirds and human …
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Variation in the use of intermittently open estuaries by birds : a study of four estuaries in the Eastern Cape, South Africa
… along a section of the Eastern Cape coast by waterbirds, and the factors that influence avifaunal community composition in space and time. The study area consisted of four IOEs of varying sizes within a 40 km stretch of coastline in the warm temperate coastal biogeographical region of South …
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Assessing conservation of a tropical African estuary : waterbird disturbance, livelihoods, and ecotourism
… was achieved by assessing the vulnerability of waterbirds to disturbance from human activity in the estuary, the current use and importance of the area to local livelihoods, and the value (current and potential) of tourism. Waterbird densities and levels of human activity were quantified from 20 …
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Nesting and Boat Disturbance Studies of Colonial Birds in the Okavango Delta, Botswana
Colonial waterbirds nesting at the Okavango Delta have been subjected to different forms of human disturbances. Motor boat disturbance is one main example of these disturbances. The objectives of my study were to: (I) obtain baseline data on the nesting success and nest height in colonial …
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STOMACH CONTENT ANALYSIS OF BOTULISM-AFFECTED BIRDS IN LAKE MICHIGAN
… and continues to threaten breeding and migratory waterbirds in the region. From 2010 to 2012, several northern Lake Michigan beaches were monitored for avian mortalities by National Park Service, Common Coast Research and Conservation, and U.S. Geological Survey personnel, partners, and …
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Using state-space time series analysis on wetland bird species to formulate effective bioindicators in the Barberspan wetland
… count data to a measure of effective number of waterbirds in an ecosystem, a measure of evenness of an ecosystem, and an abundance index respectively. Using these three indices, in conjunction with each other, and individual waterbird species as bioindicators for various wetland traits, the end …
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Macroinvertebrate Response to Management Strategies and Habitat Condition at Kealia Pond NWR, Maui, Hawaii
… food source for breeding and nonbreeding waterbirds and their abundance and distribution is dependent on vegetation and a diversity of environmental variables. To determine macroinvertebrates relationships within specific plant communities and habitat conditions, a 2-years study was …
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Gradient Subgroup Scanning for Distributionally and Outlier Robust Models
… and other previous methods when applied to the Waterbirds image dataset.
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CHROMOSOMAL SIGNATURES OF AGING, SIBLING STATUS, AND POLLUTANTS: AN EXPLORATION OF COMMON LOON TELOMERE DYNAMICS
… immer</em>). Common loons are piscivorous waterbirds, living sometimes longer than 30 years, and they produce one to two chicks each year after they reach six years of age. The purpose of this study was to explore environmental factors that could cause rapid rates of telomere loss. …
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