Fig. 2: Summary of geochemical observations from impaired orange streams and unimpaired reference sites. | Communications Earth & Environment

Fig. 2: Summary of geochemical observations from impaired orange streams and unimpaired reference sites.

From: Metal mobilization from thawing permafrost to aquatic ecosystems is driving rusting of Arctic streams

Fig. 2

Box plots of (a) pH, (b) SO42-, and (c) sum of total metals (Al, Mn, Fe, Zn, Ni, Cu, Co, Cd, As, Pb) of unimpaired streams (n = 13) and impaired streams (n = 10) of the Agashashok, Kugururok, and Salmon rivers, and a terrestrial seep (n = 1). d Pie chart indicating average distribution of metals from unfiltered water samples of impaired streams. Box plots present the median as the center line, the 75th and 25th percentile ranges as the upper and lower box boundaries, the 90th and 10th percentiles are the error bars, and letters identify differences of statistical significance (two-tailed t tests: pH: t = 2.51, df = 20, P = 0.035; SO42-: t = −2.777, df = 15, P = 0.014; Sum of Metals: t = −3.353, df = 15, P = 0.004).

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