Evol Ecol Res 7: 1125-1137 (2005)     Full PDF if your library subscribes.

Evolution of multi-stage dormancy in temporally autocorrelated environments

Helen Ivarsson,* Jörgen Ripa and Per Lundberg

Department of Theoretical Ecology, Ecology Building, Lund University, SE-223 62 Lund, Sweden

Author to whom all correspondence should be addressed.
e-mail: helen.ivarsson@teorekol.lu.se


Question: Under what circumstances does a capacity for multi-stage dormancy (i.e. dormancy in more than one life-stage) evolve?

Mathematical methods: Optimization in stochastic environments. Results are derived both analytically and by simulations.

Key assumption: There exists some trade-off between resources allocated to reproduction and adult dormant survival. Different shapes of this trade-off are investigated.

Major conclusions: Multi-stage dormancy can evolve in an environment with low serial autocorrelation. However, a slowly changing environment, with high positive autocorrelation, will prevent the evolution of dormancy in several life-stages. In general, a high positive environmental autocorrelation will separate the evolution of life parameters associated with active life from that of parameters associated with dormant life.

Keywords: autocorrelation, dormancy, life-history evolution, stage structure, stochastic environment.

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