Appendix S1. Additional data from experiments.

Table S1. Tuber production at the individual level, for the shallow, medium and deep treatment.

Figure S1. Relationship between rainfall and water level for the period 1995–2003.

Figure S2. Illustration of the three offspring size distribution strategies: lognormal, uniform, and single-size.

Figure S3. Results for simulation experiment #4: fitness in an unchanging environment for various values of s.

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