Jacob Johansson Ph.D.

Postdoc jacob.johansson <at> biol.lu.se   Supervisor: Niclas Jonzén

Research interest and projects

I study phenological responses to climate change using game-theoretic models. Together with Niclas Jonzen and Kjell Bolmgren, I model how individuals should respond to climate change in terms of the timing of seasonal events and how timing affects demography and population densities. Currently we study the timing of flowering and trait correlations in annual plants alongside with phenological responses across trophic levels in a plant-insect-bird model system.

I am also interested in interactions between evolution, ecological processes and environmental change in general. How do continuous ecological changes, for example invasions, cascade extinctions and stochastic population dynamics affect the evolutionary process? Which kind of perturbations is most harmful for a community – fluctuations and variability, catastrophes or sudden environmental change?

I am also involved in developing eco-evolutionary models for explaining fundamental patterns of variation in plant community structure. The project is part of an international collaborative effort to create a new generation of evolutionarily informed vegetation models for predicting responses to global climatic trends.

Selected Publications

Johansson, J., Ripa, J., Kuckländer, N. 2010. The risk of competitive exclusion during evolutionary branching: effects of resource variability, correlation and autocorrelation. Theoretical Population Biology 77: 95-104.

Johansson, J. and Dieckmann, U. 2009. Evolutionary responses of communities to extinctions, Evolutionary Ecology Research 11: 561–588

Johansson, J. 2008. Evolutionary Responses to Environmental changes: How does competition affect adaptation? Evolution 62: 421-435

Johansson, J. and Ripa, J. 2006. Will sympatric speciation fail due to stochastic competitive exclusion? The American Naturalist 168: 572-578

Conferences and scholarships

Phenology 2010, Dublin, 2010 (Poster)

Global change and plant microevolution, Switzerland, 2008 (Talk)

Evolution 2007, Christchurch, New Zealand, 2007 (Talk)

PhD Ecology, Symposium, Lilla Vik, Lund University, Sweden, 2006 (Organising committe)

7th Hans Kristiansson Symposium, Lund University, Sweden 2006 (Organising committe)

Stanislaw Lem Workshop of Evolution, Lviv, Ukraine 2005 (Invited talk)

PhD meeting in Evolutionary Ecology, Bordeaux, France 2005 (Talk)

10th congress European Society for Evolutionary Biology, Krakow, Poland 2005, (Poster)

Young Scientist Summer Program (YSSP), IIASA, Austria, Adaptive Dynamics Network, 2004