Extended Data Table 1.

Fish mercury concentrations in the experimental and reference lakes over time

Footnote: Linear regression statistics [F = y0 + (a × x)] of the change in annual mean (yellow perch, blacknose shiner) or body-size standardized (northern pike, lake whitefish) concentrations (ng g⁻¹ w.w.) of ambient and lake spike MeHg (measured as THg) in fish muscle tissue during the addition phase or entire study. Isotopic Hg additions were made to Lake 658 from 2001–2007; Lake 240 is a reference lake. Fish collections occurred each autumn.

*lake spike below detection in 2001 (pike: n = 32; whitefish: n = 7 of 9); regression from 2002–2007