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. Author manuscript; available in PMC: 2017 Jan 12.
Published in final edited form as: Harmful Algae. 2016 Apr;54:223–238. doi: 10.1016/j.hal.2016.01.003

Figure 7.

Figure 7

Mean summer alkalinity estimates for the three basins of Lake Erie since 1983. Data demonstrate a drop in CaCO3 equivalents since the early 1980’s that is coincident with the invasion of D. polymorpha into the system. While some level of recovery has been observed in the Central and Eastern basins, alkalinity in the western basin remains low. Data from the Great Lakes National Program Office (courtesy. R. Barbiero).