Investigations on the invasion success of Ulmus pumila - a multi-continental survey [article]

Heidi Hirsch, Richardson, David, Prof. Dr., Henrik Wehrden, Hensen, Isabell, Prof. Dr., Martin-Luther Universität, Universitäts- Und Landesbibliothek Sachsen-Anhalt
Invasive species are ideal models because non-native populations are often characterized by increased vigor in contrast to conspecific populations in the native range. Comparative studies between native and non-native populations can therefore help to determine if these differences are based on phenotypic plasticity or rapid evolutionary processes. Four comparative studies were adopted in this thesis to investigate the invasion success of Ulmus pumila in the Western United States and in central
more » ... ates and in central Argentina. The results point to an evolutionary shift of early life cycle traits in U. pumila populations from both non-native ranges, and that non-native populations occur under less stressful climatic conditions than native populations. Evidence was found for genetic admixture due to multiple introductions. This thesis emphasizes the consequences of uncontrolled multiple introductions of a non-native species and how abiotic factors in the non-native ranges might have additionally shaped the invasion success. The thesis contributes to a better understanding of evolutionary processes in non-native woody plants and how they can provoke their invasiveness.
doi:10.25673/967 fatcat:xscxoybuundvldewqk4a4dnphy