Fig. 1: Non-linear responses to increasing temperatures.
From: Rethinking the interpretation of spring phenological temperature sensitivity
a The effect of car speed on the required time to drive a given distance. b The effect of temperature on the required time to accumulate a given thermal sum is fixed here as 400 GDDs. The time required to budburst decreases with increasing temperature exponentially, analogously to (a). c Time to budburst as a function of temperature under constant species-specific thermal sums. The solid line represents the modeled mean time to budburst, including the 0.95 confidence interval, as a function of forcing temperature. The dots represent the underlying raw data from twig cuttings exposed to different temperature conditions (x-axis) and a 16 h photoperiod until budburst after sufficient chilling conditions5. d The log–log transformed time to budburst-temperature relationship of the data shown in (c) to linearize the relationship.
