Erratum to: Analysis of a sugar maple tree core for monitoring environmental uranium contamination

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In the original publication of the article, the soil leachate (L1, L2, L3) concentrations and Fig. 2 was published erroneously. The Supplemental Information 1 and Supplemental Information 2 also published with incorrect values. The corrected version of Fig. 2 is provided in this erratum. Within the first paragraph of Results section, the sentence that reads ‘‘The total anthropogenic soil leach (L3) contained 425 ppb U relative to ashed sample weight, whereas the weaker leaches simulating the bioavailable U fraction (ultrapure H2O, L1; and 0.05 N HNO3, L2) were 1.9 and 1.2 ppb, respectively, relative to dry sample weight’’ should be modified to ‘‘The total anthropogenic soil leach (L3) contained 4451 ppb U relative to ashed sample weight, whereas the weaker leaches simulating the bioavailable U fraction (ultrapure H2O, L1; and 0.05 N HNO3, L2) were 18.1 and 12.2 ppb, respectively, relative to dry sample weight.’’ Additionally, the sentence in the second paragraph of the Discussion section currently reads: ‘‘The lower concentrations observed in tree core sections are likely due to (1) low abundances of bioavailable U in the surrounding soil (\2 ppb in soil leachates) and (2) selective root uptake and continued deposition of U in the cell structure whereas tree bark is the primary depositional surface for airborne particulates [8].’’ It should read ‘‘The lower concentrations observed in tree core sections are likely due to (1) low abundances of bioavailable U in the surrounding soil (\18 ppb in soil leachates) and (2) selective root uptake and continued deposition of U in the cell structure whereas tree bark is the primary depositional surface for airborne particulates [8].’’ The corrected version of Supplemental Information 1 and Supplemental Information 2 is provided in this erratum.