Fig. 2: The effects of total yearly precipitation and mean yearly temperature on the proportion of annuals (among herbaceous species).
From: Revising the global biogeography of annual and perennial plants
a, The proportion of annuals in each of Whittaker’s biomes41. b, The proportion of annuals in each ecoregion (the outline of Whittaker’s biomes is marked by orange lines). c, Predictions of a linear regression model of the proportion of annuals as a function of the mean yearly precipitation and temperature (contour lines every 5%). Note that the scale is different for a. n = 682.
