About the Authors
Ecologie, Systématique, et Evolution, UMR CNRS 8079, Universite Paris-Sud, Orsay, France
The authors have declared that no competing interests exist.
FC conceived and designed the experiments. EA performed the experiments. FC, EA, PR, LS, LB, and YM analyzed the data. FC wrote the paper. RH constructed and analyzed the mathematical model. YM helped construct the mathematical model