Don Axelrad
William H. Orem
Todd Z. Osborne
Mark C. Gabriel
2015
<p><span>The purpose of this forum is to respond to a rebuttal submitted by Julian et al., Environ Manag 55:1–5, </span><span class="CitationRef">2015</span><span> where they outlined their overall disagreement with the data preparation, methods, and interpretation of results presented in Gabriel et al. (Environ Manag 53:583–593, </span><span class="CitationRef">2014</span><span>). Here, we provide background information on the research premise presented in Gabriel et al. (Environ Manag 53:583–593, </span><span class="CitationRef">2014</span><span>) and provide a defense for this work using five themes. In spite of what Julian et al. perceive as limitations in the sampling methods and analytical tools used for this work, the relationships found between fish total mercury and surface water sulfate concentrations in Gabriel et al. (Environ Manag 53:583–593, </span><span class="CitationRef">2014</span><span>) are comparable to relationships between pore water methylmercury (MeHg) and pore water sulfate found in past studies indicating that sulfate is important to MeHg production and bioaccumulation in the Everglades. Julian et al. state “…there is no way to justify any ecosystem-wide sulfur strategy as a management approach to reduce mercury risk in the (Everglades) as suggested by Gabriel et al. (Environ Manag 53:583–593, </span><span class="CitationRef">2014</span><span>), Corrales et al. (Sci Tot Environ 409:2156–2162, </span><span class="CitationRef">2011</span><span>) and Orem et al. (Rev Environ Sci Technol 41 (S1):249–288, </span><span class="CitationRef">2011</span><span>).” We disagree, and having stated why sulfate input reduction to the Everglades may be the most effective means of reducing mercury in Everglades fish, it is important that research on sulfur and mercury biogeochemistry continues. If further studies support the relationship between sulfate loading reduction and MeHg reduction, sulfur mass balance studies should commence to (1) better quantify agricultural and connate seawater sulfate inputs and (2) define opportunities to reduce sulfate inputs to the Everglades ecosystem.</span></p>
application/pdf
10.1007/s00267-015-0486-0
en
Springer
Response to "Comment on and Reinterpretation of Gabriel et al. (2014) "Fish Mercury and Surface Water Sulfate Relationships in the Everglades Protection Area""
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