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Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

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Maumee Trends 1975-2012:<br />

DRP Loads<br />

Maumee River 1975-2012<br />

Dissolved Reactive <strong>Phosphorus</strong> Load (tonnes)<br />

500<br />

450<br />

400<br />

350<br />

300<br />

250<br />

200<br />

150<br />

100<br />

50<br />

0<br />

1973 1978 1983 1988 1993 1998 2003 2008 2013<br />

Fall<br />

Spr<strong>in</strong>g<br />

Summer<br />

W<strong>in</strong>ter<br />

Poly. (Fall)<br />

Poly. (Spr<strong>in</strong>g)<br />

Poly. (Summer)<br />

Poly. (W<strong>in</strong>ter)<br />

Big seasonal differences!

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