期刊
WATER AIR AND SOIL POLLUTION
卷 225, 期 6, 页码 -出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11270-014-1960-7
关键词
Fecal indicator bacteria; FIB; Tiered approach; Bacteroides; Water quality; Source tracking; HF183; Sand
资金
- University of California Marine Council [442591-JJ-19939]
- Regional Water Quality Control Board
The variability of levels of fecal indicator bacteria (FIB) and a human-associated genetic marker (HF183) during wet and dry weather conditions was investigated at two urban coastal watersheds in Southern California: Santa Monica Canyon channel (SMC) and Ventura Harbor, Keys, and Marina. Seventy-eight to 86% of the samples collected from SMC sites exceeded standard water quality standards for FIB (n=59 to 76). AtSMC, HF183 was present in 58% of the samples (n=78) and was detected at least once at every sample site. No individual site at SMC appeared as a hotspot for the measured indicators, pointing to a likely chronic issue stemming from urban runoff in wet and dry weather. In Ventura, the Arundell Barranca, which drains into Ventura Harbor and Marina, was a source of FIB, and HF183 was most frequently detected off of a dock in the Marina. Rainfall significantly increased FIB levels at both SMC and Ventura; only at Ventura did HF183 detection increase with wet weather. Sample locations that were high in FIB were geographically distinct from the sites that were high in HF183 in Ventura, which supports the importance of measuring host-associated parameters along with FIB in chronically impaired watersheds to guide water quality managers in pollution remediation efforts.
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