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Fig. 1 Impacts of intensified acidification on stream pH and calcium concentration.
Impacts of intensified acidification on stream pH and calcium concentration. Distribution of stream water pH (A) and calcium concentration (mg/liter) (B) from 1989 to 2012 for both the treatment (WS3) and control (WS4) watersheds. Median value represented by horizontal black bar. Filled circles outside of the first and fourth quartile error bars denote statistical outliers. Matthew Lanning et al. Sci Adv 2019;5:eaav5168 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).
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