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Chlorophyll Criteria based on SAV Minimum Light Habitat Requirements. ca. 22% surface light for PH/MH ca. 13% for OH/TF => K d Z=1.5 PH/MH or 2.0 OH/TF. Four Factors Contribute to Water-column Light Attenuation. Water Colored dissolved organic matter Chlorophyll
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Chlorophyll Criteria based on SAV Minimum Light Habitat Requirements • ca. 22% surface light for PH/MH • ca. 13% for OH/TF • => KdZ=1.5 PH/MH or 2.0 OH/TF
Four Factors Contribute to Water-column Light Attenuation • Water • Colored dissolved organic matter • Chlorophyll • Suspended particulate matter
Crudely, we can write Bay-wide Average Parameters
Maximum allowable median Chl during SAV growing season Maximum allowable median Chl during SAV growing season Rearrange to Calculate Water Quality Threshold for SAV Survival
Problems & Caveats • Application depth for water clarity criterion varies with location • Contribution of CDOM to light attenuation varies with location (scheduled for monitoring) • Optical properties of suspended particulate matter highly variable • Uncertain how to deal with bloom vs. chronic levels