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. Author manuscript; available in PMC: 2021 Aug 24.
Published in final edited form as: Environ Int. 2020 Nov 29;146:106284. doi: 10.1016/j.envint.2020.106284

Fig. 7.

Fig. 7.

Total concentration of dissolved Mn in the Rio Doce estuary water sampled in 2015 and 2017. The red dashed line indicates the threshold according to the Brazilian water quality guidelines for brackish water (100 μg L−1; CONAMA, 2005). The different lowercase letters indicate a significant difference between the variables as determined by the Kruskal-Wallis test at the 5% probability level.