Description: Das Projekt "Population Genetics of Capercaillie (Tetrao urogallus) in the Swiss Alps" wird vom Umweltbundesamt gefördert und von Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft durchgeführt. Population vulnerability may have a genetic background which is tightly connected to population size and spatial position relative to neighbouring populations. Interrupted gene flow and inbreeding or genetic drift may accelerate decreases of vulnerable species. In the long term, populations that are small or isolated from large core populations are expected to show low genetic diversity and a high degree of differentiation as a consequence of low or absent gene flow. Population decline of capercaillie (Tetrao urogallus) in the Alps has put this species at great risk of regional extinction. To understand the dynamics of capercaillie populations, genetic variation will be analysed in three study regions using nuclear microsatellite markers (simple sequence repeats, SSR). Allelic diversity, gene flow, and differentiation among populations as well as heterozygosity within populations will be used as key parameters to evaluate possible metapopulation dynamics. To determine whether reduced numbers of populations and individuals indeed show a loss of allelic diversity, we will genotype museum specimens from the same regions as a reference to present-day diversity, whereas individuals from extinct areas may mediate, in a genetic sense, between extant, differentiated populations. The aims of this project are to estimate historical gene flow: How many individuals per generation dispersed among populations and regions? detect genetic relatedness and differentiation among populations: Are geographic and genetic distances between populations positively correlated? relate estimated population size to genetic diversity and differentiation: Is inbreeding more pronounced in small compared with large populations? determine genetic variation of museum specimens from remnant populations: Can we detect higher allelic diversity in museums compared to extant populations? establish genetic relationships among populations of the past and present: Do extinct genotypes mediate between extant, genetically separated populations? These results will be implemented in a spatially explicit metapopulation model including respective data from studies on habitat suitability and population dynamics. Description and modelling of population genetic processes at the regional level will help to understand the dynamics among and within populations of vulnerable species. This study will provide guidelines for conservation strategies applicable to other organisms with large-scale demands for suitable habitat areas, and which are at the brink of extinction due to human-altered landscape. This project is part of WWK-Modul 4 (Gefährdete Arten: Modellfall Rauhfusshühner).
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Populationsrückgang ? Auerwild ? Gen ? Populationsdynamik ? Raufußhühner ? Genökologie ? Schlichtemittel ? Genotyp ? Genetische Variation ? Bevölkerungsrückgang ? Genetik ? Pflanzensamen ? Tracer ? Brunnen ? Schweiz ? Vulnerabilität ? Waldfläche ? Gefährdete Arten ? Habitat ? Leitfaden ? Wirkung ? Konservierung ? Pestizidabdrift ? Modellierung ? Metapopulation ? Bohrkern ? Daten ? Mensch ? Schnee ? Studie ? Genetische Vielfalt ? Alpen ? Bevölkerung ? Diversität ? Forschungseinrichtung ? Kenngröße ? Organismen ? Richtlinie ? Risiko ? Landschaft ? Gebiet ? Strategische Aspekte ? Sequenzierung ? regional ? Bruch ? vergleichen ? Hilf ? verwandt ? Bemessung ? Inzucht ? Nachfrage ? Beschreibung ? Dauer ? Ortsbestimmung ? Probe ? Projekt ? Differenzierung ? Referenz ? Dispergierung ? Art [Spezies] ? Abnahme ? Teil ? Ergebnis ? Fluss [Bewegung] ? Verarbeiten ? Werkzeug ? sonstig ? ausgestorben ? aussterben ? geschichtlich ? Gegenwart ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2001-01-01 - 2006-12-31
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