Fig 1. Seed number/size relationship and pollen limitation.

Partial residual plot showing the relationship between the standardised slope (β) for the relationship between seed number and size and the pollen limitation index (PL) in the alpine community. PL was calculated as 1- seed set of open pollinated plants / seed set of hand-pollinated plants (see [36] for details), and increases as the value of the index increases. Lines represent the estimates of the best model, and dots represent the partial residuals of the model (sampling units are plant species).