Extended Data Fig. 3: Threshold model for ecosystem respiration rates and air temperature when all low frequency temperature intervals were removed.
From: Temperature thresholds of ecosystem respiration at a global scale
Threshold model for half-hourly ecosystem respiration rates and air temperature when all low frequency temperature intervals shown in Extended Data Fig. 2 (identified by asterisks) were removed from the dataset. Threshold model predictions (solid line, for the fixed effects of temperature only in a) identified a single temperature threshold of 14.6 °C, with little support for a second temperature breakpoint (b, ΔAIC < 5 and p > 0.05). The dashed line in a indicate an activation energy of −7.50 K as predicted by metabolic theory and ΔAICs in b are between the linear and threshold model. Full details of the threshold mixed effects model are presented in Supplementary Table 3.
