Jörgen Ripa

Researcher

Research areas and keywords

UKÄ subject classification

  • Evolutionary Biology
  • Ecology

Keywords

  • macroevolution, speciation, population dynamics, Adaptive dynamics, adaptive radiations

Research

Research Interests

Macroevolution - from speciation to adaptive zones

I theoretically study processes of niche coevolution, especially in the context of speciations and adaptive radiations. What eco-evolutionary mechanisms can explain patterns of niche conservatism or adaptive zones? Why are some groups more speciose than others? A key interest is linking well understood microevolutionary processes to such large scale macroevolutionary patterns. These are fundamental questions for the intrepretation of current biogeographic and phylogenetic data, and our understanding of the emergence of species on earth.

TREES - a TRait-based Eco-Evolutionary Simulation tool

I have develop TREES, a versatile tool for individual based simulations of large systems of evolving, competing species. It includes trait-based, eco-evolutionary feedbacks, full-blown genetics and evolving mating behavior. A main feature is the possibility to combine different modules to a large variety of models, which can be aimed at a multitude of scientific questions. TREES is open-source and free to use.

Species evolution in variable environments

All organisms have to cope with a variable physical environment. However, such variation also generates fluctuating population densities, which in itself imposes a variable selection pressure. Moreover, the fluctations in population size will depend on what type or life history strategy is currently dominating the population. I am interested in this feedback loop between the short-term ecological time-scale and the long-term evolutionary time-scale. How do species and in particular species interactions evolve when all interacting species vary in abundance over time as well as space?

Population and community dynamics in variable, stochastic, environments

I also have a long term interest in the interplay between endogenous population dynamics, driven by ecological interactions, and structured (temporally or spatially) environmental fluctuations.

Recent research outputs

Tobin D. Northfield, Jörgen Ripa, Lucas A. Nell & Anthony R. Ives, 2020 Nov 17, In : Ecology Letters.

Research output: Contribution to journalArticle

Lai Zhang, Xavier Thibert-Plante, Jörgen Ripa, Richard Svanbäck & Åke Brännström, 2019, In : Evolution. 73, 8, p. 1504-1516 13 p.

Research output: Contribution to journalArticle

Henrik Sjödin, Jörgen Ripa & Per Lundberg, 2018 Dec 19, In : Proceedings of the Royal Society B: Biological Sciences. 285, 1893, 20182603.

Research output: Contribution to journalArticle

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