Fig. 4

Relationship between site-scale monthly fine root productivity rate and soil temperature (ST) from the previous month (left panel) and between site-scale monthly fine root mortality rate and water table level (WT) from the previous month (right panel) at all sites (n = 30). Values in grey in parenthesis are the standard error of the coefficients of the models. All coefficients of regression are significant at P < 0.007. WT and ST data were collected monthly from March 2016 to January 2017 concurrently with the monthly sampling of fine roots. These data were published by Hergoualc’h et al. [19]