Table 1 The response of surface respiration to soil temperature, quantified by the apparent Q10 values and evaluated for the temperature difference in the heating treatment and for the ambient seasonal temperature variation

From: Large emissions of CO2 and CH4 due to active-layer warming in Arctic tundra

 

N

Q10

Significance

Seasonal Q10. Control plots, for periods when heaters were on

79

6.948

P < 0.0001

Seasonal Q10. Control plots, all time points (heaters on & off)

98

8.512

P < 0.0001

Seasonal Q10. All plots, all time points (heaters on and off)

209

4.352

P < 0.0001

Seasonal Q10. All plots, for periods when heaters were on.

168

4.107

P < 0.0001

Treatment Q10, based on heated–control difference

79

Median = 2.798

  1. The fits were non-linear least squares (NLS) for the variation in temperature, using all time points as noted and the treatment combinations shown. The treatment Q10 was calculated from the heated and control differences in temperature and respiration each day, using Eq. 4. Data from October 2015 were not included.
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