The Role of Behavioural Changes in Biological Invasions [thesis]

Florian Ruland, Universitätsbibliothek Der FU Berlin, Universitätsbibliothek Der FU Berlin
2020
All ecosystems on Earth are undergoing rapid human-induced changes. One important component of these changes is the transport of species to new ecosystems, where they often establish and spread, and cause ecological disruption as invasive species. Behaviour plays a major role in this process, not only by enabling species to spread or establish, but also in the native species' response to invasion. These behavioural changes drive population dynamics, and the speed at which they happen are
more » ... y happen are crucial. The shared evolutionary history between two species influences how fast or effective these changes happen. To study these complicated interactions, this thesis combines a comparative study of the existing literature with novel concepts and metadata, as well as analyses of laboratory experiments and field data. For Chapter 1, a large cross-taxonomical dataset on behavioural changes in biological invasions was gathered and analysed. It is the first to include native and non-native species, to identify types of behaviour and mechanisms of change and to quantify the speed of the behavioural change. This gave us the opportunity to test hypotheses in invasion ecology, but also to explore the distribution of learning across types of behaviour and its implications for the speed of behavioural change. All analyses were conducted considering the biases in the data and differences in the ecology of native and invasive species. In Chapter 2, the behavioural differences between an established non-native crayfish species, the spiny-cheek crayfish Faxonius limosus, and the novel non-native marbled crayfish (Procambarus virginalis) were experimentally quantified, and findings were used to predict the invasion success of the latter species. Experiments were designed to show the outcome of inter-specific agonistic interactions, activity and exploration. Finally, not only inter-specific differences were tested but also between both sexes of the spiny-cheek crayfish, and between lab-reared and wild-caught individuals of the marbled crayfish [...]
doi:10.17169/refubium-27270 fatcat:ajwrltgl5vhpfom64qkacbnxdy