Celis-Salgado, M.P., Keller, W. (Bill) and Yan, N.D. 2016. Calcium and sodium as regulators of the recovery of four Daphnia species along a gradient of metal and base cations in metal contaminated lakes in Sudbury, Ontario, Canada. Journal of Limnology. 75, s2 (Apr. 2016). DOI:https://doi.org/10.4081/jlimnol.2016.1271.