Microbial Source Tracking in a Coastal California Watershed Reveals Canines as Controllable Sources of Fecal Contamination
Citations Over TimeTop 10% of 2014 papers
Abstract
Elevated levels of fecal indicator bacteria (FIB), including Escherichia coli and enterococci, trigger coastal beach advisories and signal public health risks. Solving FIB pollution in suburban coastal watersheds is challenging, as there are many potential sources. The Arroyo Burro watershed in Santa Barbara, CA is an example, with its popular, but chronically FIB-contaminated beach. To address, a microbial source tracking study was performed. Surface waters were sampled over 2 years, FIB were quantified, and DNA was analyzed for host-associated fecal markers. Surf zone FIB were only elevated when the coastal lagoon was discharging. Among the fecal sources into the lagoon, including upstream human sources and coastal birds, canines were the most important. Canine sources included input via upstream creek water, which decreased after creek-side residences were educated about proper pet waste disposal, and direct inputs to the lagoon and surf zone, where dog waste could have been tidally exchanged with the lagoon. Based on this study, canine waste can be an influential, yet controllable, fecal source to suburban coastal beaches.
Related Papers
- → Using microbial source tracking to identify fecal contamination sources in Sag Harbor on Long Island, New York(2022)
- → Using microbial source tracking to identify fecal contamination sources in Patchogue and Bellport Bays on Long Island, New York(2022)
- → Using microbial source tracking to identify fecal contamination sources in Lake Montauk on Long Island, New York(2022)
- → Using microbial source tracking to identify fecal contamination sources in Great South Bay on Long Island, New York(2022)
- → Using microbial source tracking to identify fecal contamination sources in South Oyster Bay on Long Island, New York(2022)