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  • 1
    Online-Ressource
    Online-Ressource
    Cary :Oxford University Press, Incorporated,
    Schlagwort(e): Birds -- Conservation -- America. ; Birds -- Migration -- America. ; Birds -- Ecology -- America. ; Birds -- Habitat -- America. ; Electronic books.
    Beschreibung / Inhaltsverzeichnis: The apparent decline in numbers among many species of migratory songbirds is a timely subject in conservation biology, particularly for ornithologists, ecologists, and wildlife managers. This book is an attempt to discuss the problem in full scope. It presents an ambitious, comprehensive assessment of the current status of neotropical migratory birds in the U.S., and the methods and strategies used to conserve migrant populations. Each chapter is an essay reviewing and assessing the trend from a different viewpoint, all written by leaders in the fields of ornithology, conservation, and population biology.
    Materialart: Online-Ressource
    Seiten: 1 online resource (506 pages)
    Ausgabe: 1st ed.
    ISBN: 9780195359176
    DDC: 598.252/5/097
    Sprache: Englisch
    Anmerkung: Intro -- Contents -- Introduction: Importance of Knowledge and its Application in Neotropical Migratory Birds -- PART I: POPULATION TRENDS -- 1 Population Trends from the North American Breeding Bird Survey -- 2 The Strength of Inferences about Causes of Trends in Populations -- PART II: TEMPORAL PERSPECTIVES ON POPULATION LIMITATION AND HABITAT USE -- 3 When and How are Populations Limited? The Roles of Insect Outbreaks, Fire, and Other Natural Perturbations -- 4 Summer versus Winter Limitation of Populations: What are the Issues and What is the Evidence? -- 5 Habitat Requirements During Migration: Important Link in Conservation -- 6 Habitat Use and Conservation in the Neotropics -- PART III: FOREST MANAGEMENT -- 7 Impacts of Silviculture: Overview and Management Recommendations -- 8 Effects of Silvicultural Treatments in the Rocky Mountains -- 9 Silviculture in Central and Southeastern Oak Pine Forests -- PART IV: GENERAL HUMAN EFFECTS -- 10 Effects of Agricultural Practices and Farmland Structures -- 11 An Assessment of Potential Hazards of Pesticides and Environmental Contaminants -- 12 Livestock Grazing Effects in Western North America -- PART V: SCALE PERSPECTIVES -- 13 Habitat Fragmentation in the Temperate Zone -- 14 A Landscape Ecology Perspective for Research, Conservation, and Management -- 15 Ecology and Behavior of Cowbirds and their Impact on Host Populations -- 16 Single-Species versus Multiple-Species Approaches for Management -- 17 Summary: Model Organisms for Advancing Understanding of Ecology and Land Management -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- K -- L -- M -- N -- O -- P -- R -- S -- T -- W.
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Restoration ecology 3 (1995), S. 0 
    ISSN: 1526-100X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: When the Kissimmee River was channelized in the 1960s and 1970s and placed under stage-fluctuation management, the dynamic interactions between the river and the flood-plain were essentially removed. Correspondingly, aquatic invertebrate life in the river and floodplain ecosystem shifted from a riverine to a more lacustrine fauna. A relinkage of the Kissimmee River with the floodplain following restoration will result in numerous changes to such ecologically important factors as streamflow, substrate composition, food quality and quantity, and water quality, all of which will influence invertebrate communities. These factors and their function in the ecosystem as the fauna shifts from predominantly lacustrine back to riverine are presented in a conceptual model. As an integral component of all aquatic ecosystems and a key link between primary producers and higher trophic levels, aquatic invertebrates are a valuable group with which to evaluate the recovery of the Kissimmee River. Utilization of a geographic information system mapping approach linking expected increased habitat heterogeneity and invertebrate richness with restoration efforts is suggested as an economical means of monitoring recovery of the Kissimmee River ecosystem.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Macromolecules 28 (1995), S. 8845-8854 
    ISSN: 1520-5835
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    ISSN: 1520-510X
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    ISSN: 1546-1718
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Medizin
    Notizen: [Auszug] Airway hyperresponsiveness is a key characteristic of human asthma and a marker for asthma–like conditions in animals. F1 mice derived from A/J and C57BL/6J display a phenotype which resembles the asthma–like phenotype of the A/J mice. Since airway responsiveness failed to segregate as ...
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] ATP-dependent, Ca2+-activated secretion proceeds through sequential ATP-dependent priming and Ca2+-activated triggering steps for which distinct cytosolic proteins are required5. Three rat brain cytosolic PEP proteins with apparent Mrs of 500K (PEP1), 120K (PEP2) and 20K ...
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    CardioVascular & interventional radiology 18 (1995), S. 367-372 
    ISSN: 1432-086X
    Schlagwort(e): Superior vena cava syndrome ; Expandable metallic stents ; Venous occlusion ; Palliativetherapy ; Lung carcinoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Purpose To assess the use of percutaneous endovascular stent insertion in the management of superior vena cava (SVC) occlusion. Methods Percutaneous endovascular stent insertion was attempted in 13 patients, age range 20–72 (mean 55.5) years, with symptomatic total occlusion of the SVC. Twelve patients had known malignant disease of the thorax. The other patient (age 20) had chronic SVC obstruction, the cause of which was unknown at the time of the procedure. There was initial angiographic assessment and removal of thrombus by thrombolysis (10 patients) and/or clot aspiration (3 patients). Following successful lysis or aspiration, single or multiple endovascular stents were inserted. Results The inability to cross the lesion with a guidewire prevented stent insertion in 2 patients (15.4%). There was primary success in the remaining 11 patients (84.6%), with associated symptomatic relief. Some recurrence of symptoms occurred in 5 of the 11 patients (45.5%) after a time interval ranging from 14 to 183 days. In all cases of symptomatic recurrence, patency was reestablished with further thrombolysis and/or further stent insertion. All successfully treated patients have since died. All 11 patients remained symptomatically free of SVC occlusion until death, with postprocedure survival ranging from 5 to 243 days. Conclusion The percutaneous management of complete SVC occlusion with thrombolysis and/or clot aspiration followed by stent insertion is safe and effective, giving sustained symptomatic relief.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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