Fig. 2.

Output of multi-response multiple regression testing relationships between population means of leaf traits of Protea repens, measured on plants grown in the Kirstenbosch common garden, and the home climate for the 19 seed collection sites. The upper row of three climate axes are from a principal components analysis of seven environmental variables measuring temperature and rainfall for the seed source climate. See Materials and methods for descriptions of climate variables and leaf trait abbreviations. Morphological leaf traits are from 2 and 3 years post-planting, and year and source population are random effects in the model. The thickness of the line is proportional to the regression coefficient estimate. Only significant relationships are shown, with black and grey lines representing positive and negative relationships, respectively. There was also a marginally significant positive relationship between SLA and Axis 2, which is not shown.