Articles | Volume 14, issue 18
Biogeosciences, 14, 4341–4354, 2017
https://doi.org/10.5194/bg-14-4341-2017
Biogeosciences, 14, 4341–4354, 2017
https://doi.org/10.5194/bg-14-4341-2017

Research article 28 Sep 2017

Research article | 28 Sep 2017

Soil respiration across a permafrost transition zone: spatial structure and environmental correlates

James C. Stegen et al.

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Short summary
CO2 loss from soil to the atmosphere (soil respiration) is a key ecosystem function, especially in systems with permafrost. We find that soil respiration shows a non-linear threshold at permafrost depths > 140 cm and that the number of large trees governs soil respiration. This suggests that remote sensing could be used to estimate spatial variation in soil respiration and (with knowledge of key thresholds) empirically constrain models that predict ecosystem responses to permafrost thaw.
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