School of Earth and Environmental Sciences, Queens College, City University of New York, 65-30, Kissena Boulevard, Queens, New York, USA; U.S. Geological Survey, New York Water Science Center, 2045 Route 112, Building 4, Coram, NY, USA.
U.S. Geological Survey, New York Water Science Center, 2045 Route 112, Building 4, Coram, NY, USA.
Mar Pollut Bull. 2020 Jan;150:110598. doi: 10.1016/j.marpolbul.2019.110598. Epub 2019 Nov 13.
Onsite wastewater disposal systems (OWDS) can introduce bacterial and chemical contaminants, via groundwater, into aquifers and adjacent waterways. We evaluated the concentration of fecal indicator bacteria (FIB) and antibiotic resistant bacteria (ARB) in the shallow groundwater of Eastern Long Island, New York, downgradient of OWDS using cultivation approaches and analysis of 16 S rRNA genes. While FIB and ARB were detected in 80% and 67% of groundwater samples, respectively, concentrations were low, suggesting that, at least at the time of sampling, groundwater was not a large-scale source of fecal bacterial contamination to adjacent embayments. ARB isolates did not include common fecal associated genera and the concentration of FIB and ARB did not correlate well with the concentration of pharmaceutical contaminants, suggesting that bacterial contaminants were poorly linked to OWDS discharge. Concentrations of FIB in the studied embayments were significantly greater in nearshore compared to mid-channel environments, suggesting that land-based sources are likely to be the major contributors of bacterial contamination.
现场污水处理系统（OWDS）可能会通过地下水将细菌和化学污染物引入含水层和相邻的水道。我们使用培养方法和 16S rRNA 基因分析评估了纽约长岛东部 OWDS 下游浅层地下水的粪便指示菌（FIB）和抗生素耐药菌（ARB）浓度。尽管 FIB 和 ARB 分别在 80%和 67%的地下水样本中被检测到，但浓度较低，表明至少在采样时，地下水不是附近海湾粪便细菌污染的大规模来源。ARB 分离株不包括常见的粪便相关属，并且 FIB 和 ARB 的浓度与药物污染物的浓度相关性不佳，表明细菌污染物与 OWDS 排放的关联性较差。研究中港湾的 FIB 浓度在近岸地区明显高于航道中部环境，表明陆基污染源可能是细菌污染的主要来源。
