Sediment composition influences spatial variation in the abundance of human pathogen indicator bacteria within an estuarine environment.
Sediment composition influences spatial variation in the abundance of human pathogen indicator bacteria within an estuarine environment.
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DOI：
10.1371/journal.pone.0112951
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
McDonald JE
中科院分区：
文献类型：
--
作者：
Perkins TL;Clements K;Baas JH;Jago CF;Jones DL;Malham SK;McDonald JE
河口和沿海水域的粪便污染可能对人类健康构成威胁，特别是在用于贝类生产或娱乐的地区。常规微生物水质检测突出了水柱内粪便指示菌(FIB)污染的区域，但没有考虑沉积物中FIB的丰度，在某些水动力条件下，沉积物可能会重新悬浮。沉积物可以促进FIB在河口环境中的生存，但沉积物组成对FIB的生态和丰度的影响还知之甚少。为了确定沉积物组成(粒度和有机质)与病原指示细菌(PIB)丰度的关系，采集了英国康威口四个横断面的沉积物。可培养的大肠杆菌、总大肠菌群、肠球菌、弯曲杆菌、沙门氏菌和弧菌的丰度。沉积物中有机质含量与沉积物颗粒大小、有机质含量、盐度、深度和温度有关。沉积物中含有较高比例的粉砂和/或粘土以及相关有机质含量与PIB的丰度呈显著正相关。此外，每个细菌群的丰度与所列举的所有其他群的存在呈正相关。弯曲杆菌属。不是从河口沉积物中分离出来的。可培养大肠杆菌、总大肠菌群和弧菌数量的比较。沉积物和水柱中它们的丰度(菌落形成单位(CFU)/100g)分别是水柱(CFU/100ml)的281、433和58倍。这些数据提供了对促进河口环境中PIB丰度的沉积物组成的重要见解，对基于沉积物再悬浮和迁移的公共健康风险的建模和预测具有重要影响。
Faecal contamination of estuarine and coastal waters can pose a risk to human health, particularly in areas used for shellfish production or recreation. Routine microbiological water quality testing highlights areas of faecal indicator bacteria (FIB) contamination within the water column, but fails to consider the abundance of FIB in sediments, which under certain hydrodynamic conditions can become resuspended. Sediments can enhance the survival of FIB in estuarine environments, but the influence of sediment composition on the ecology and abundance of FIB is poorly understood. To determine the relationship between sediment composition (grain size and organic matter) and the abundance of pathogen indicator bacteria (PIB), sediments were collected from four transverse transects of the Conwy estuary, UK. The abundance of culturable Escherichia coli, total coliforms, enterococci, Campylobacter, Salmonella and Vibrio spp. in sediments was determined in relation to sediment grain size, organic matter content, salinity, depth and temperature. Sediments that contained higher proportions of silt and/or clay and associated organic matter content showed significant positive correlations with the abundance of PIB. Furthermore, the abundance of each bacterial group was positively correlated with the presence of all other groups enumerated. Campylobacter spp. were not isolated from estuarine sediments. Comparisons of the number of culturable E. coli, total coliforms and Vibrio spp. in sediments and the water column revealed that their abundance was 281, 433 and 58-fold greater in sediments (colony forming units (CFU)/100g) when compared with the water column (CFU/100ml), respectively. These data provide important insights into sediment compositions that promote the abundance of PIB in estuarine environments, with important implications for the modelling and prediction of public health risk based on sediment resuspension and transport.
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影响因子：
3.7
作者：
Danovaro R;Fonda Umani S;Pusceddu A
通讯作者：
Pusceddu A
影响因子：
12.8
作者：
Davies-Colley, RJ;Donnison, AM;Nagels, JW
通讯作者：
Nagels, JW
影响因子：
4
作者：
Davies, CM;Bavor, HJ
通讯作者：
Bavor, HJ
影响因子：
8.9
作者：
An, YJ;Kampbell, DH;Breidenbach, GP
通讯作者：
Breidenbach, GP
DOI：
10.1111/j.1365-2672.1991.tb02935.x
发表时间：
1991-03-01
期刊：
JOURNAL OF APPLIED BACTERIOLOGY
影响因子：
--
作者：
DAVIES, CM;EVISON, LM
通讯作者：
EVISON, LM