Počet záznamů: 1
Linking events through the annual cycle in migratory songbirds: causes and consequences of different spatiotemporal strategies
Údaje o názvu Linking events through the annual cycle in migratory songbirds: causes and consequences of different spatiotemporal strategies [rukopis] / Martins Briedis Další variantní názvy Propojení fází ročního cyklu u malých pěvců: význam sezónních interakcí pro ekologii tažných ptáků Osobní jméno Briedis, Martins, (autor diplomové práce nebo disertace) Překl.náz Linking events through the annual cycle of small songbirds: the importance of carry-over effects for the ecology of migratory birds Vyd.údaje 2017 Fyz.popis 130 Poznámka Ved. práce Peter Adamík Dal.odpovědnost Adamík, Peter (vedoucí diplomové práce nebo disertace) Dal.odpovědnost Univerzita Palackého. Katedra zoologie a ornitologická laboratoř (udelovatel akademické hodnosti) Klíč.slova long-distance migrant * migration strategy * annual cycle * carry-over effects * migratory connectivity * long-distance migrant * migration strategy * annual cycle * carry-over effects * migratory connectivity Forma, žánr disertace dissertations MDT (043.3) Země vyd. Česko Jazyk dok. angličtina Druh dok. PUBLIKAČNÍ ČINNOST Titul Ph.D. Studijní program Doktorský Studijní program Biologie Studijní obor Zoologie kniha
Kvalifikační práce Staženo Velikost datum zpřístupnění 00196333-999196776.pdf 32 7 MB 15.07.2017 Posudek Typ posudku 00196333-ved-137692765.pdf Posudek vedoucího 00196333-opon-871107244.docx Posudek oponenta
Each year animals move across and between continents to track seasonal changes in resource availability and abundance to improve their survival and reproductive opportunities. Birds represent one of the largest animal group that engage in these global-scale migration events. Afro-Palearctic bird migration system is estimated to facilitate more than 2 billion individual birds that link ecological communities of the two continents. Recent advances in tracking technology, like light-level geolocators, have enabled us to follow even the smallest of individual migrants as they complete their annual cross-continental journeys. This has opened a new era in bird migration research allowing us to gain unique insights into spatiotemporal organization of full annual cycles of individual songbirds. Furthermore, these technological advances allow for estimation of migratory connectivity between breeding and non-breeding populations as well as linking spatially and temporarily distinct phases of the annual cycles of migratory birds. In my dissertation I couple geolocator tracking with stable isotope signatures, breeding data, and environmental variables to unravel spatiotemporal migration strategies and identify the importance of carry-over effects operating in wild populations of long-distance migrants. I reveal how annual events are interlinked with one another and the environment on the level of individual birds, populations, and species. I use three Afro-Palearctic migratory birds Tawny Pipit Anthus campestris, Collared Flycatcher Ficedula albicollis, and Semi-collared Flycatcher F. semitorquata as model species. Besides answering trivial questions of where and when each of the model species migrate, I found that there is a great deal of variation in the migration strategies among individuals and populations. Breeding site phenology is the main driver of migratory schedules on a population level, while individual variation in timing of migratory episodes are mediated via carry-over effects of previous breeding effort and conditions experienced at the non-breeding sites. Crossing of the Sahara Desert, which majority of the successful migrants accomplish in a single endurance flight, serves as a gateway between Europe and Africa for long-distance migratory birds. Only after the cross-desert flight, environmental and phenological cues can be picked up and used for accurate timing of spring migration and timely arrival for breeding. Studies from the perspective of full annual cycles are still underrepresented in animal ecology research. The chapters comprising this dissertation adds only a drop in the vast pool of knowledge in animal migration ecology. However, such information is of topmost priority for understanding the drivers of population dynamics as many migratory species are currently declining.Each year animals move across and between continents to track seasonal changes in resource availability and abundance to improve their survival and reproductive opportunities. Birds represent one of the largest animal group that engage in these global-scale migration events. Afro-Palearctic bird migration system is estimated to facilitate more than 2 billion individual birds that link ecological communities of the two continents. Recent advances in tracking technology, like light-level geolocators, have enabled us to follow even the smallest of individual migrants as they complete their annual cross-continental journeys. This has opened a new era in bird migration research allowing us to gain unique insights into spatiotemporal organization of full annual cycles of individual songbirds. Furthermore, these technological advances allow for estimation of migratory connectivity between breeding and non-breeding populations as well as linking spatially and temporarily distinct phases of the annual cycles of migratory birds. In my dissertation I couple geolocator tracking with stable isotope signatures, breeding data, and environmental variables to unravel spatiotemporal migration strategies and identify the importance of carry-over effects operating in wild populations of long-distance migrants. I reveal how annual events are interlinked with one another and the environment on the level of individual birds, populations, and species. I use three Afro-Palearctic migratory birds Tawny Pipit Anthus campestris, Collared Flycatcher Ficedula albicollis, and Semi-collared Flycatcher F. semitorquata as model species. Besides answering trivial questions of where and when each of the model species migrate, I found that there is a great deal of variation in the migration strategies among individuals and populations. Breeding site phenology is the main driver of migratory schedules on a population level, while individual variation in timing of migratory episodes are mediated via carry-over effects of previous breeding effort and conditions experienced at the non-breeding sites. Crossing of the Sahara Desert, which majority of the successful migrants accomplish in a single endurance flight, serves as a gateway between Europe and Africa for long-distance migratory birds. Only after the cross-desert flight, environmental and phenological cues can be picked up and used for accurate timing of spring migration and timely arrival for breeding. Studies from the perspective of full annual cycles are still underrepresented in animal ecology research. The chapters comprising this dissertation adds only a drop in the vast pool of knowledge in animal migration ecology. However, such information is of topmost priority for understanding the drivers of population dynamics as many migratory species are currently declining.
Počet záznamů: 1