Fig. 2. Effect of temperature on early growth and tree lifespan.

a Relationship between early growth rates (mean ring width over first 10 years) and temperature for nine different species sampled across North America and Europe. b Relationship between maximum lifespan and temperature for the same species. c Early growth and lifespan relationships for Picea mariana from Quebec for sites within a fixed annual temperature range. d Relationship between temperature and lifespan for trees within a fixed early growth rate band. Non-significant relationships (p > 0.05) are shown with stippled lines. No adjustments were made for multiple comparisons.