Mean summertime (June–August) of epilimnion temperatures for (a) Lake Sidi Boughaba, (b) Sidi Ali Lake and mean summertime (June–August) metalimnion temperatures for (c) Lake Sidi Ali. In (a) and (b), dash dot blue lines represent statistically significant (p < 0.5) locations of abrupt changes in epilimnion temperatures and dash dot red lines represent mean temperatures for each period. In (c) dash dot blue lines represent metalimnion temperatures for Sidi Ali show few important significant abrupt changes.