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Showing 1 to 20 of 44 for “"shorebirds"”.
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Intertidal mudflats and the conservation of migratory shorebirds
Migratory shorebirds rely on intertidal habitats that are increasingly threatened by habitat loss, human disturbance, and climate change. Investigating habitat availability, its influence on shorebird populations and how to prioritise conservation efforts is critical to inform conservation …
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Building a Comprehensive Understanding of Disturbance Mitigation in Migrating Shorebirds
Human disturbance is a serious threat facing shorebirds, and reducing disturbance presents a significant conservation challenge. It requires an understanding of the complex factors that influence both shorebird biology and human behavior related to shorebirds and coastal environments. This thesis …
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Reducing Human Disturbance to Atlantic Flyway Shorebirds Using Social Science Methods
Human disturbance is a significant threat to shorebirds in North America. Disturbance can result in direct mortality or have long-term impacts on the survival of shorebirds. Land managers employ a variety of management techniques to minimize anthropogenic impacts on shorebirds, but because the …
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Estimating occupancy and abundance of shorebirds through aerial surveys in the Illinois river valley
"Shorebirds are one of multiple guilds of wetland birds that have been experiencing population declines over the last 50 years. These species migrate long distances between northern breeding grounds and southern wintering grounds, and many need to stop and refuel along the way. The Illinois River …
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Aspects of the ecology of migrant shorebirds (Aves: Charadrii) at the Berg River estuary, South Africa
… of current models for the migratory behaviour of shorebirds. Controversy over the Winter competition model is discussed. The intertidal mudflats (144 ha) at the Berg River estuary support an exceptionally high density of migratory shorebirds during the austral summer. The high density of birds …
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Survey and home range analyses of wintering shorebirds using the Lanark Reef Shorebird Complex, Franklin Co., Florida
… document spatial variation in use by wintering shorebirds at a series of sites believed to form the Lanark Reef Shorebird Complex in Franklin County. Fifty and 95% convex polygon home range estimate for Willets (Catoptrophorus semipalmatus) averaged 0.52 km 2 and 14.85 km2, respectively. Fifty …
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Shorebird migration in western Kentucky: phenology, habitat use, and possible effects of prey availability
… the coasts provide reliable food resources and shorebirds may use the same stopover locations every year. However, shorebirds use sites opportunistically in the interior of North America due to the transient nature of many habitats. Little is known, however, about the use of wetlands by …
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The Effects of Weather on Wetland Habitat Conditions and Shorebirds During Spring and Fall Migration in Northwest Minnesota
… Agassiz National Wildlife Refuge for migratory shorebirds between seasons and years with variable weather conditions. Habitat conditions between 2002, a wet year, and 2003, a dry year, varied considerably. The percent of flooded off-refuge wetlands varied between 100% in spring 2002 to a low of …
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Human disturbance impact on shorebirds at Muizenberg Beach, South Africa, during and prior to the COVID-19 lockdown
… knowledge gaps prevail, including its effects on shorebirds. The 2020 global COVID-19 pandemic resulted in a period of abnormally limited human mobility that has been coined the ‘anthropause'. In South Africa, a national lockdown commenced on 27 March 2020 and consisted of five levels to combat …
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Migrant Shorebird, Breeding Waterfowl, and Invertebrate Reponse to Conditions in Temporary Wetlands in Easter Central South Dakota During Spring
… for shorebird and waterfowl use. Over 5,000 shorebirds used these wetlands in both 1997 and 1998. Of the 26 shorebirds species observed, the most abundant were white-rumped, pectoral, and Baird's sandpipers. During both years, the peak of shorebird migration occurred during the second and …
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Community Compostition and Microhabitats of Macroinvertebrates on Sandbars within the Lower Missouri River as a Food Source for Foraging Migratory Shorebirds
… microhabitats as a source of food for migratory shorebirds. Nearly 40 species of shorebirds migrate between breeding and wintering grounds through interior North America every year. There are documented cases of significant threats to 36 species (72%) during migration. Migratory shorebirds need …
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Atmospheric and spatial drivers of egg abundance in beach nesting shorebirds across an urban-coastal gradient of the Rockaway Peninsula, New York
… of reproductive patterns in beach-nesting shorebirds is essential for conservation in dynamic coastal systems. This study evaluated the influence of atmospheric, geomorphological, and anthropogenic factors on egg abundance and nesting patterns across four distinct areas of the Rockaway …
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Effects of Spatial and Temporal Variation in Resource Availability on the Growth Rates and Survival of Dunlin (Calidris Alpina Hudsonia) Chicks
… arthropod availability due to climate change. Shorebirds have precocial chicks which may compensate for food shortages by responding to spatial and temporal variation in arthropod availability. I hypothesize that shorebirds capitalize on this mobility to select quality foraging habitats to …
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Effects of an Increasing Lesser Snow Goose Population on Shorebird Foraging Ecology at La Perouse Bay, Manitoba
… modeling determined that distribution of these shorebirds between habitats was dependent on species and season. Dunlin, least sandpiper, semipalmated sandpiper and short-billed dowitcher were more abundant in moderate habitat, while pectoral sandpiper and semipalmated plover foraged more in …
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Exploring the interplay of ecological and social factors in human-induced disturbance of the African Oystercatcher (Haematopus moquini): insights and management recommendations for conservation
… the hypothetical regulations aimed at protecting shorebirds, despite strongly agreeing that shorebird protection and regulations are important. The contradiction theme centred around two sub-themes. Firstly, the species literacy gap that emerged when the recreationists agreed that they were …
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Shorebirds in a changing landscape: Assessing the top-down and bottom-up drivers of American oystercatcher (<i>Haematopus palliatus</i>) reproductive success in the Virginia barrier islands
Understanding the factors that affect population growth is a vital component of the conservation of imperiled species. On the United States (U.S.) Atlantic and Gulf coasts, the American oystercatcher (Haematopus palliatus) is largely managed within a conservation framework that aims to identify and …
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Influence of Habitat Characteristics on Wetland Bird Abundance and Species Richness at Ordway Prairie, South Dakota
… tricolor) were the most common breeding shorebirds. Lesser yellowlegs (Tringa flavipes) were the most commonly occurring migrant shorebird. Abundance varied between 1998 and 1999 for some species. Multiple regression models were used to explore possible reasons for that variation. Surface …
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Predicting the ecosystem effects of harvesting beach-cast kelp for biofuel
… for beaches. These fauna are valuable prey to shorebirds, as demonstrated by a strong positive relationship (R2 = 0.82) between wader abundances and the percentage cover of wrack on beaches. Inshore, drifting macroalgae was associated with elevated abundances of detritivorous hyperbenthic fauna …
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A System-Level Analysis of Migratory Shorebird Habitat Use, Diet, and the Influence of Climate-Driven Ecosystem Change in the Virginia Barrier Islands
Migratory shorebirds rely on high-quality coastal staging habitats to refuel during migration, but these sites are threatened by climate change. The Virginia barrier island system supports over 100,000 shorebirds annually, including federally threatened red knots (Calidris canutus rufa) and other …
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