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5A <br />Measuring nutrient sources: <br />The need for a paradigm shift <br />Dr. Edie Widder, Co -Founder, CEO & Senior Scientist <br />Ocean Research & Conservation Association <br />www.teamorca.org <br />is a trademark of the Ocean Research & Conservation Association, Inc. <br />©2009 Ocean Research & Conservation Association, Inc. All rights reserved. <br />ORCA Kilroys have revealed recurrent cyanobacteria blooms in canals. <br />'Traditional' watershed with short hydraulic <br />residence times carries nutrients to mouth <br />of tributary where they trigger algae blooms. <br />Measured nutrients at mouth of tributary are HIGH. <br />In Florida watershed with long hydraulic residence <br />times, freshwater algae blooms occur upstream. Algae <br />take up nutrients and release them again when cells reach <br />estuary and die. Algae blooms in canals are contributing <br />cyanotoxins, nutrients and muck to the IRL <br />even though measured nutrients at <br />mouth of tributary may be LOW. <br />