Fig. 7: Areas with summertime temperatures associated with the highest risk of elevated microcystin concentrations are moving northward.
From: Geographic redistribution of microcystin hotspots in response to climate warming

a–d, The absolute difference of summertime air temperatures to 22 °C, the approximate temperature with the highest risk, for the historic period (1950–1979) (a), present (1990–2019) (b), projected mid-century (2030–2059) (c) and projected late-century (2070–2099) (d).