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Laboratoire Chrono-Environnement
Université Bourgogne/Franche-Comté
16 route de Gray
Bât. Propédeutique, Office -211M
25030 Besançon cedex, France

Phone : +33 (0)3 81 66 58 29

Research interests

  • Human activities impacts on wildlife
  • Predation – prey interactions
  • Foraging strategies
  • Eco-physiology
  • Ecotoxicology

My research program investigates the ecology of birds and mammals, and seeks to understand the ways in which environment drive the evolution of physiological and behavioural processes. I try to understand how the human activities (agriculture, hunting pressure, contamination …) influence behaviours and physiology to maintain diversity in life-history strategies. I am broadly interested in understanding the diversity of life history strategies and the wide variety of behavioral tactics that animals use to survive in their changing environment.


2012 Ph.D. Population ecology, Poitiers University.
2007 M.Sc. Funtional ecology, Perpignan University.
2005 B.Sc. Biology, Strasbourg University.


  • Powolny, T., Eraud, C., LeRest, K. and Bretagnolle, V. (2017). Seed depletion and landscape structure affect aggregative response of wintering farmland birds. Bird Study.
  • Powolny, T., Bretagnolle, V., Dupoué, A., Lourdais, O. and Eraud, C. (2016) Cold tolerance and sex-related hypothermia explain winter sexual segregation in farmland bird. Biochemical and Physiological Zoology, 89, 151-160.
  • Powolny, T., Eraud, C., Masson, J.D. and Bretagnolle, V. (2015) Vegetation structure and inter-individual distance affect intake rate and foraging efficiency in a granivorous forager, the Eurasian Skylarks Alauda arvensis. Journal of Ornithology, 156, 569-578.
  • Eraud, C., Cadet, E., Powolny, T., Gaba, S., Bretagnolle, F. and Bretagnolle, V. (2015). The contribution of weed seeds to the diet of wintering skylarks Alauda arvensis in arable farmlands in western France. European Journal of Wildlife Research, 61, 151-161.
  • Gaba, S., Collas, C., Powolny, T., Bretagnolle, F., and Bretagnolle, V. (2014) Seed quality traits affect their predation by granivorous birds: Skylarks trade size and energy content in weed seed to maximize total ingested lipid biomass. Behavioural Processes, 108, 142-150.
  • Powolny, T., Bretagnolle, V., Aguilar, A. and Eraud, C. (2014) Sex-related differences in the trade-off between foraging and vigilance in granivorous foragers. PLoS ONE 9(7): e101598. doi:10.1371/journal.pone.0101598.
  • Powolny, T., Eraud, C. and Bretagnolle, V. (2012) Group size modulates time budget and foraging efficiency in captive Skylarks Alauda arvensis. Journal of Ornithology, 153, 485-490.