Temperature sensitivity of mineral soil carbon decomposition in shrub and graminoid tundra, west Greenland

Table 3 Plausible models (ΔAICc < 2) explaining cumulative soil respiration

Model Rank	Predictor Variable	No. of Parameters	AICc	ΔAICc	AICc Model Weight	Log-likelihood Log (L)
1	Temp + Moisture + Veg + Depth + Temp:Depth	7	110.9	0.0	0.30	-48.13
2	Temp + Moisture + Veg + Depth + Temp:Depth + Temp:Veg	8	111.2	0.3	0.26	-47.18
3	Temp + Veg + Moisture + Depth + Temp:Depth + Temp:Veg + Depth:Veg	9	112.2	1.3	0.16	-46.57

Models that contain all four main effects (temperature (Temp), vegetation type (Veg), moisture level (Moisture), depth (Depth)), and a temperature-depth interaction (Temp:Depth) are preferred. Temperature-vegetation (Temp:Veg) and depth-vegetation (Depth:Veg) interactions are “pretending variables” that only marginally increase the likelihood that the model represents that data (Log(L)) (Additional file 3: Table S1)

ISSN: 2053-7565