Tag: Peconic Estuary

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Via SCERP: HIGH LEVELS OF NITROGEN PROMOTE RUST TIDES ON LONG ISLAND

August 27th 2013 – Last week, Rust tides caused by the dinoflagellate, Cochlodinium, emerged on eastern Long Island and have since spread east through the Peconic Estuary and Shinnecock Bay. A recent study performed more than two dozen experiments over a four year period in five different Long Island estuaries and found that the loading of nitrogen during significantly increased the growth of Cochlodinium relative to other phytoplankton groups, demonstrating that nitrogen promotes rust tides (1; see figure). In south shore bays, the primary source of nitrogen is septic tanks (2). Recent investigations of the Peconic Estuary found that septic tanks, cesspools, and fertilizers were all important nitrogen sources (3).

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