Species dynamics in a changing world

One could summarize my research in terms of "interactions": how individuals interact, making complex population dynamics arise, how local mechanisms interact to produce large-scale patterns, how large-scale patterns affect individuals, and how human societies interact with their environment...In practice, I have dealt a lot with woody plant dynamics: forest species migration under climate change, how mechanisms like re-sprouting or seed masting affect community dynamics, forest expansion with changes in grazing practices, how wind dispersal drives the spread of invasive trees. I have also had a long interest for the consequences of these dynamics on other organisms, notably birds, which leads to similar questions: how do birds use their habitat? what is the consequence of bird life-history traits for large-scale patterns?

I favour models as tool to address these questions for theoretical or applied studies. I have long used individual-based modeling, which allows to simulate different situations with great flexibility. Combined with adequate statistical analyses or GIS utilities, it gives a good insight into ecological phenomena in space and time. Other types of models (differential equation spread models, niche-based models) are also part of my toolkit, and I like to juggle with approaches to study a system from different angles.

I am currently working for BECC (Biodiversity and Ecosystem services in a Changing Climate) as a researcher. I lead an interdisciplinary project focussing on species range-shifts, an exciting job that put me in contact with many different researchers, allowing me to slowly get a broad understanding of the methods and objectives related to this topic.

Current collaborations

  • Forest Roads, Birds and Timber (FoRBiT): modelling economic and spatial logic behind road openings and their effects on forest landscapes (with Lovisa Solbär, Lund University)
  • Characterizing the distribution of life-history traits amongst bird communities in Swedish forests;
  • Developing metrics of range-shifts for mobile organisms (typically, birds) (with Åke Lindström and Cath Davey, Lund University)
  • Identifying the best habitat descriptors for forest bird distribution (with Henrik Smith, Keith Larson and others, Lund University)
  • Quantifying the role of wintering habitat for the population dynamics of Swedish birds (with Veiko Lehsten, Mikael Pontarp, Ullrika Sahlin, Johan Lindström and Niklas Olén, Lund University)
  • Modelling the evolution of dispersal and the fecundity / establishment / dispersal trade-off (with Shaun Coutts and Yvonne Buckley, UQ / Trinity College Dublin)
  • Dispersal barriers in a changing world (with Eric Petit, CNRS, and many others)
  • Combining bird population models and dynamic vegetation models to study the consequences of land-use and climate change on bird distribution in Sweden (with Ben Smith, Lund University)
  • Role of frugivore movement for the persistence of an endemic tree in the Western Ghats (with Madhur Anand and Arundhati Das, ATREE)

Past collaborations
  • Management of invasive trees (with Bruce Maxwell, Cang Hui, Duane Peltzer, Dave Richardson)
  • Understanding the mechanisms that allow invasive trees to invade, with a focus on long distance dispersal and demography (with , Yvonne Buckley and Ran Nathan, HUJ, Israel)
  • Implication of temporal cycles for population dynamics and invasions
  • Tree species coexistence: relating spatial patterns and species life-traits
  • Response of the boreal forest to climate change (with Madhur Anand, Env. Biol. and Chris Bauch, Maths and Stats, University of Guelph, Ontario, Canada)
  • Open habitat bird response to grassland fragmentation (with Jocelyn Fonderflick, SupAgro Florac, France)
  • Importance of farming practices for biodiversity conservation (with Pascal Marty and Jacques Lepart, CEFE-CNRS)