Response of phytoplankton and bacterial biomass during a wastewater effluent diversion into nearshore coastal waters

A 3-week diversion of the Orange County Sanitation District effluent discharge into nearshore waters off Newport Beach, CA constituted a considerable injection of secondarily-treated effluent into the coastal ecosystem. The location ≈1.6 km from shore, shallow water depth (≈16 m), volume and nutrien...

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Bibliographic Details
Published in:Estuarine, coastal and shelf science coastal and shelf science, 2017-02, Vol.186, p.223-236
Main Authors: Caron, David A., Gellene, Alyssa G., Smith, Jayme, Seubert, Erica L., Campbell, Victoria, Sukhatme, Gaurav S., Seegers, Bridget, Jones, Burton H., Lie, Alle A.Y., Terrado, Ramon, Howard, Meredith D.A., Kudela, Raphael M., Hayashi, Kendra, Ryan, John, Birch, James, Demir-Hilton, Elif, Yamahara, Kevan, Scholin, Chris, Mengel, Michael, Robertson, George
Format: Article
Language:English
Subjects:
Bacteria
Coastal ecology
Effluent
HABs
Nutrients
Phytoplankton
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Summary:A 3-week diversion of the Orange County Sanitation District effluent discharge into nearshore waters off Newport Beach, CA constituted a considerable injection of secondarily-treated effluent into the coastal ecosystem. The location ≈1.6 km from shore, shallow water depth (≈16 m), volume and nutrient content of the discharge (≈5.3 × 108 L day−1 of effluent with inorganic nitrogen concentration >2 mM) during the diversion raised concerns regarding the potential for stimulating phytoplankton blooms and, in particular, blooms of toxic species. Remarkably, phytoplankton standing stocks during the event and shortly thereafter did not reach values associated even with minor blooms historically observed in the region (generally
ISSN:0272-7714
1096-0015
DOI:10.1016/j.ecss.2015.09.013