Fig. 3: Effects of rewetting in relation to antecedent summer drought in a boreal stream network.
From: The emerging role of drought as a regulator of dissolved organic carbon in boreal landscapes
a percent change in dissolved organic carbon DOC (r2 range 0.20–0.67, p < 0.05), b low molecular weight DOC (LMW DOC) (r2 range 0.21–0.64, p < 0.05), c carbon to nitrogen ratio (C/N ratio) (r2 range 0.2–0.59, p < 0.05), d percent change in specific UV absorbance at 254 nm SUVA254 (r2 range 0.21–0.64, p < 0.05 respectively), all plotted against the number of low flow days in the previous summer. Points represent the changes for each summer relative to the pre-drought (June) averages, and regression lines are fitted to the data for individual catchments. Data for the C/N ratio for the driest summer (2006) are missing because sampling for nitrogen started in 2007. Additionally, for some of the larger sites (C10, C12, C14, C15), sampling stopped in 2017, hence data for 2018 and 2019 were unavailable.
