Temporal variations in fecal indicator bacteria in bathing water and sediment in a coastal ecosystem (Aytre Bay, Charente-Maritime, France)

被引:3
作者
Ndione, Mery [1 ]
Ory, Pascaline [1 ]
Agion, Tony [2 ]
Treilles, Michael [3 ]
Vacher, Luc [1 ]
Simon-Bouhet, Benoit [4 ]
Le Beguec, Maelig [1 ]
Pineau, Philippe [1 ]
Montanie, Helene [1 ]
Agogue, Helene [1 ]
机构
[1] La Rochelle Univ, CNRS, Littoral Environm & Soc LIENSs, UMR 7266, La Rochelle, France
[2] QUALYSE, Lab Anal, La Rochelle, France
[3] QUALYSE, Lab Anal, Champdeniers, France
[4] La Rochelle Univ, Ctr Etud Biol Chize CEBC, CNRS, UMR 7372, Chize, France
关键词
Bathing water; Coastal beaches; Microbiological quality; Fecal indicator bacteria; Environmental drivers; Seasonal variation; ESCHERICHIA-COLI; BEACH SAND; ENTERIC PATHOGENS; LAKE-MICHIGAN; QUALITY; TRACKING; CONTAMINATION; MARKERS; ENTEROCOCCI; POLLUTION;
D O I
10.1016/j.marpolbul.2022.113360
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study presents the fecal contamination dynamic at the two bathing sites of Aytre Bay (Charente Maritime, France). We quantified fecal indicator bacteria (FIB) abundances (Escherichia coli and enterococci) from water and sediment samples over one-year survey. Then we measured biological (bacterial abundance, chlorophyll -a), physico-chemical (dissolved nutrients and oxygen, salinity, pH ...) and climatic (temperatures, rainfall and tidal coefficient) parameters. Results showed that FIB abundances were occasionally higher than the European regulatory threshold during winter, summer and fall. The "poor quality " of the bathing water was due to high enterococci abundance. We found negative significant correlations between FIB and water temperature and salinity, and positive significant correlations between FIB and rainfall, PO4, NO3, NO2, and SiO2 mainly in water. Relationships between parameters showed that during summer and spring the main environmental drivers were temperature and salinity, while in fall and winter they were rainfall and dissolved nutrients.
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页数:12
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