Breeding Biology of Swainson's Warblers in a Managed South Carolina Bottomland Forest PDF Download
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Author: Jennifer Laurie Thompson
Publisher:
ISBN:
Category : Swainson's warbler
Languages : en
Pages : 164
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Author: Jennifer Laurie Thompson
Publisher:
ISBN:
Category : Swainson's warbler
Languages : en
Pages : 164
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Conservation plans for the southeastern U.S. have identified Swainson's Warblers (Limnothlypis swainsonii) to be among the more vulnerable Neotropical migrants. However, a lack of life history information, in particular breeding, jeopardizes sound management decisions. My study examined a population in Britton's Neck, South Carolina on timberland owned by International Paper Co. From 1999-2001, I conducted a breeding biology study that examined nesting, territory, vegetative, and landscape characteristics. I discovered 98 SWWA nests, 63 of which were active. SWWA nesting success equaled 60% using the Mayfield success estimator. Contrary to the notion of SWWA requiring mature forests to breed, SWWA bred successfully in 20-year old regenerating clearcuts. Multiple brooding, where a pair initiates nesting attempts after their first is successful, was detected in 20% of the pairs. An individual's seasonal fecundity was doubled by multiple brooding, increasing the young per female from 1.5 to 3.7. Brown-headed Cowbirds (Molothrus ater) parasitized only 10% of nests. No SWWA chicks were observed fledging in the presence of Cowbirds. Apparent population density was 17 territories/km2, equaling the highest density ever recorded for SWWA. One-fifth the site contained 59 territories/km2, compared to the remaining four-fifths with 12 territories/km2. I examined vegetative differences between nests built in high- versus low-density areas using a discriminant function analysis (DFA). The DFA results indicated understory thickets accounted for the largest difference between high- and low-density nest sites. Nests in the high-density area were more associated with understory thickets.
Author: Neil Allen Chartier
Publisher:
ISBN:
Category :
Languages : en
Pages : 147
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Author: Kimberly Ann Peters
Publisher:
ISBN:
Category : Swainson's warbler
Languages : en
Pages : 180
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Author: Todd M. Schneider
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 532
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This is a comprehensive historical record of all free-ranging bird species known to be breeding in Georgia around the beginning of the new millennium. The atlas profiles 182 species, from the sociable House Wren to the secretive Black Rail; from the thriving Red-shouldered Hawk to the threatened Wilson's Plover. The atlas is the result of a systematic survey conducted from 1994 to 2001, the massive collaborative effort of several private organizations, public agencies, and many individuals. It offers a wealth of information critical to bird-conservation efforts and provides a baseline so that changes to species ranges, numbers, and other significant aspects of each species' status can be better understood. Each species account includes: Color photograph of the bird Information on the bird's habitat and life history, distribution, population trends, and conservation status. Details discussed include diet, nesting habits, life cycle of the young, predators, and interactions with humans. Color distribution map showing the state's six ecoregions and indicating possible, probable, and confirmed breeding Graphs showing population trends, when appropriate Also included are chapters on the survey methodology, results of the surveys, influence of the physical environments of the state on bird distribution, changes in the avifauna since European settlement, and bird conservation.
Author: Jeffrey V. Wells
Publisher: Princeton University Press
ISBN: 1400831512
Category : Nature
Languages : en
Pages : 465
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Until now there has been no single, comprehensive resource on the status of North America's most threatened birds and what people can do to help protect them. Birder's Conservation Handbook is the only book of its kind, written specifically to help birders and researchers understand the threats while providing actions to protect birds and their habitats. Jeffrey Wells has distilled vast amounts of essential information into a single easy-to-use volume-required reading for anyone who loves birds and wants to ensure they are protected. At-a-glance species accounts cover in detail North America's one hundred most at-risk birds; each account is beautifully illustrated by today's top bird artists. The text includes status, distribution, ecology, threats, conservation actions and needs, and references. A distribution map accompanies each entry. Chapters discuss birds as indicators of environmental health, the state of North American bird populations, major conservation issues, and initiatives now underway to improve the health of North America's birds. Birder's Conservation Handbook is an indispensable resource for birdwatchers, researchers, naturalists, and conservationists. Reading it will inspire you to become an active steward of our birds and the habitats we share. A comprehensive guide to North America's one hundred most at-risk birds and how to protect them Compact and easy to use, with beautiful illustrations and data organized for convenient, at-a-glance reference Detailed species accounts, including distribution maps Practical advice on conservation Information on leading conservation agencies and resources
Author:
Publisher:
ISBN:
Category : forests and forestry
Languages : en
Pages : 618
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Author:
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ISBN:
Category :
Languages : en
Pages :
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ABSTRACT SAVAGE, AMELIA LEE. Diet of Swainsonââ'¬â"¢s Warblers on the Breeding Grounds. (Under the direction of Dr. Christopher Moorman). Swainsonââ'¬â"¢s Warbler (SWWA), Limnothlypis swainsonii, is a migratory songbird that breeds in bottomland hardwood forests across the southeastern United States. It is believed to be one of the least abundant breeding songbird species in the region. While nest-site selection has been well studied, little is known about SWWA foraging habits except that the species is insectivorous with a large bill used to flip fallen leaves on the forest floor. We captured and crop-flushed SWWA to determine diet, and sampled leaf litter arthropods and vegetation at each SWWA capture location. We compared the proportion of arthropod orders detected in crop-flush samples to the proportion of arthropods collected in the leaf litter to determine which orders were eaten by SWWA more or less than their proportional availability. Although Acari (mites and ticks) and Chilopoda (centipedes) were the most abundant arthropods recorded in the leaf litter samples (51% and 18%, respectively), these orders rarely occurred in crop flush samples. Conversely, Araneae (spiders) and Coleoptera (beetles) were uncommon in leaf litter samples (2% and 5%, respectively) but were the most abundant arthropod orders in SWWA crop flush samples. We conducted binary logistic regressions with the presence or absence of Aranids as the dependent variable and habitat measures as the independent variables. The probability that spiders were present in the leaf litter increased as leaf litter depth increased. Leaf litter depth should be preserved by maintaining closed canopy forests and natural flooding regimes to promote SWWA foraging habitat.
Author: Miodrag Zlatic
Publisher: BoD – Books on Demand
ISBN: 9535121758
Category : Technology & Engineering
Languages : en
Pages : 290
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Forests are the dominant terrestrial ecosystem of Earth. They are distributed across the globe. Forests account for 75% of the gross primary productivity of the Earth's biosphere, and contain 80% of the Earth's plant biomass. Human society and forests influence each other in both positive and negative ways. Forests provide ecosystem services to humans. Forests can also impose costs, affect people's health, and interfere with tourist enjoyment. This publication presents reviews and research results on negative and positive human interference on forests, as well as ecology, management, governance, policy and economic issues. The book consists of four sections with 12 chapters derived from around the world.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 768
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