Are toxin-forming cyanobacteria better able to tolerate oxidative stress?

H2O2 = hydrogen peroxide Oxidative stressor

0

500

1000

1500

2000

140 190 240 290

H2O

2 (nM

)

Day of year

2014 2015

Typical range in fresh or coastal waters

Cory et al. submitted

020406080

100120140

31-May 10-Jul 19-Aug 28-Sep 7-Nov

― Photochemical production of

H2O2 (nM hr-1)

― UV ― CDOM

CDOM + UV H2O2

Cory et al. submitted

0

500

1000

1500

2000

140 190 240 290

H2O

2 (nM

)

Day of year

1

10

100L

og C

hl a

(µg

L-1

)

2014 2015

Cory et al. submitted