Full text
| |
| Author(s): |
Raffaele Stasi
Total Authors: 1
|
| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2022-05-16 |
| Examining board members: |
Mathias Mistretta Pires;
Flávia Maria Darcie Marquitti;
Gustavo Burin Ferreira
|
| Advisor: | Mathias Mistretta Pires |
| Abstract | |
Determining what roles biotic interactions play in large-scale diversification patterns is a long-standing challenge in evolutionary biology. Interactions between species reg- ulate the dynamics of their populations, influencing phenotypic evolution, speciation and extinction and, therefore, can shape the dynamics of diversification. In this re- search project I developed a stochastic diversification model in which speciation and extinction probabilities are determined by morphospace occupation, which changes according to phenotypic evolution within a clade. I analyze the properties of the pro- posed model under different parameterizations and compare the results of the model with those of traditional models and null models where diversification does not de- pend on the trait distribution. The main property of the model is to generate emergent equilibrium dynamics with transient equilibria interspersed with episodes of diver- sity accumulation. Furthermore, we show that by incorporating the effects of inter- actions on diversification, we reproduce several known phenomena and processes, such as adaptive radiations, diversification driven by key innovations, and conflicts between evolutionary pressures, which are not reproducible by mean-field models or null models. Biotic interactions can generate many different diversification dynam- ics, but detecting the cause in observed patterns based on fossil or phylogenetic data is challenging. In addition to contributing to a more comprehensive understanding of the contexts in which interactions can leave detectable diversification patterns, our model allows simulations of various diversification scenarios, which can be combined with other approaches used to reconstruct the history of diversification (AU) | |
| FAPESP's process: | 19/08697-7 - Modeling the effects of ecological interactions on diversification dynamics |
| Grantee: | Raffaele Stasi |
| Support Opportunities: | Scholarships in Brazil - Master |