Presentation - Hazen and Sawyer
Presentation - Hazen and Sawyer
Presentation - Hazen and Sawyer
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Taste <strong>and</strong> Odor as a surrogate for toxin<br />
oxidation?<br />
20<br />
• Characteristics of a good surrogate<br />
Co-occurrence (Graham et al, 2010)<br />
• Microcystin co-occurred with geosmin in 87% of blooms, with MIB<br />
in 39%.<br />
• Anatoxin-a co-occurred with geosmin in 100% of blooms, with MIB<br />
in 43%.<br />
Similar trends of occurrence (Graham et al, 2010)<br />
• Although toxins <strong>and</strong> T&O frequently co-occurred, concentrations<br />
were not strongly correlated (r < 0.4, p > 0.1)<br />
• Not surprising because they are not produced by the same<br />
biochemical pathways<br />
Surrogate is conservative<br />
• Microcystin LR <strong>and</strong> Anatoxin degraded faster than MIB, but not<br />
geosmin
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