Empirical evidence linking Florida red tide blooms to nitrogen from urban and agricultural areas near the coast
https://twitter.com/jimjawitz/status/1304115018846273536

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Predominantly seasonal signals in coastal red tide and NOx in the Caloosahatchee River showed evidence of a systematic causal relationship https://twitter.com/milesphd/status/1303846398627119104
Blooms initiate ‘naturally’ in the Gulf. But once blooms arrive near the coast, anthropogenic nutrient inputs can make them worse. Our results implicate N inputs from largely urban and agricultural basins as drivers of bloom intensity and duration. https://twitter.com/milesphd/status/1303846314963349504
These basins include Caloosahatchee, which flows into the Gulf; Lake Okeechobee, an important source of freshwater and nutrients; and Kissimmee, which extends north near Orlando. Upcoming work will refine the results to see how far upstream we can trace the red tide signal.