Vasut, Radim , Sochor, Michal .
Are the populations of Salix daphnoides in the Western Carpathians (Czech Republic)natural?
Salix daphnoides Vill. is distributed from southern Europe to Scandinavia. Its natural distribution in Central Europe is confined to mountain regions of the Alps and the Carpathians. The Carpathian Mts. extends to the Czech Republic only in its easternmost part (Beskydy Mts.) and the species is naturally occurring only in this part of the country. From the ecological point of view, we can divide Carpathian populations of S. daphnoides into three groups: i) occurring on river gravel banks; ii) Wet Cirsium meadows; and iii) Ash-alder alluvial forests. Populations from the first biotype are ecologically similar to those ones from the Alps and High Carpathians, they are rich innumber of individuals and they are age-structured. Whereas populations from the second and third biotope are spatially limited and age structure is not well differentiated even in larger populations. We therefore hypothesize that at least some population of the Western Carpathians (Beskydy Mts.) are not natural, but of (older) human origin. Salix daphnoides serves as a honey-bearing tree. We therefore address the question whether or not populations on biotopes ii) and iii) might represent spontaneously and clonally reproducing willows for past hundred years. To test this hypothesis, we study population dynamics, mode of reproduction and genetic diversity of these Czech populations. We characterize populations in the field (age structure,vegetation, spatial structure of populations) and consequently analyze their genetic diversity using microsatellites (SSR, simple sequence repeats). So far,we found that populations from biotope i) are genetically diverted, however population have significant heterozygote deficit. Population from the biotope ii) and iii) are confirmed to be formed by one or two genotypes only suggesting their anthropogenic origin.
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1 - Palacky University Olomouc, Faculty of Science, Department of Botany, Slechtitelu 11, Olomouc, CZ, 78371
Presentation Type: Oral Paper:Papers for Topics
Location: Waterman Room/Chase Park Plaza
Date: Wednesday, July 13th, 2011
Time: 10:30 AM