Populační biologie a genetika vzácných druhů rostlin

• Main Author: Dostálek, Tomáš
• Other Authors: Münzbergová, Zuzana
• Format: Doctoral Thesis
• Language: English
• Published: 2010
• Online Access: http://www.nusl.cz/ntk/nusl-286852

5 Summary In this thesis I synthesized various approaches to rare species research which is necessary for their effective conservation. First three papers (paper 1, 2, 3) are dealing with Dracocephalum austriacum, which is rare and endangered species throughout the whole Europe. In the first paper I studied complete life cycle of this species and focused on differences between two distant regions. The results suggest that the knowledge of the most important life cycle transitions can be transferred between regions. However, the long term predictions of population growth and their sensitivity to external disturbance are largely region specific. In the second paper I estimated genetic diversity and its distribution in populations and regions using allozyme analyses. The results showed large variation in genetic diversity between populations and indicated which populations should get a priority in attempts to conserve all the genetic diversity within the region. The second paper also revealed significant positive relationship between seed production and genetic diversity. The third paper combines the two previous studies. It is the first study explicitly linking changes in population dynamics and changes in genetic diversity. I found that decrease of expected heterozygosity caused strong decrease in long term...