Historical Associations of Molecular Measurements of Escherichia coli and Enterococci to Anthropogenic Activities and Climate Variables in Freshwater Sediment Cores

被引:5
作者
Brooks, Yolanda M. [1 ]
Baustian, Melissa M. [2 ,3 ]
Baskaran, Mark [4 ]
Ostrom, Nathaniel E. [5 ]
Rose, Joan B. [1 ,6 ]
机构
[1] Michigan State Univ, Dept Microbiol & Mol Genet, 480 Wilson Rd,Room 13, E Lansing, MI 48824 USA
[2] Michigan State Univ, Ctr Water Sci, 288 Farm Lane,Room 203, E Lansing, MI 48824 USA
[3] Water Inst Gulf, 301 North Main St,Suite 2000, Baton Rouge, LA 70825 USA
[4] Wayne State Univ, Dept Geol, 0224 Old Main, Detroit, MI 48202 USA
[5] Michigan State Univ, Dept Integrat Biol, 288 Farm Lane,Room 203, E Lansing, MI 48824 USA
[6] Michigan State Univ, Dept Fisheries & Wildlife, 480 Wilson Rd,Rm 13, E Lansing, MI 48824 USA
基金
美国国家科学基金会; 美国海洋和大气管理局;
关键词
FECAL INDICATOR BACTERIA; ORGANIC-MATTER SOURCES; GENETIC-MARKERS; LAKE-SEDIMENTS; PERSISTENCE; ACCUMULATION; SYSTEMS; GENEVA;
D O I
10.1021/acs.est.6b01372
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 investigated the long-term associations of anthropogenic (sedimentary P, C, and N concentrations, and human population in the watershed), and climatic variables (air temperature, and river discharge) with Escherichia coli uidA and enterococci 23S rRNA concentrations in sediment cores from Anchor Bay (AB) in Lake St. Clair, and near the mouth of the Clinton River (CR), Michigan. Calendar year was estimated from vertical abundances of Cs-137. The AB and CR cores spanned c.1760-2012 and c.1895-2012, respectively. There were steady state concentrations of enterococci in AB during c.1760-c.1860 and c.1910-c.2003 at similar to 0.1 X 10(5) and similar to 2.0 x 10(5) cell equivalents (CE) per g-dry wt, respectively. Enterococci concentrations in CR increased toward present day, and ranged from similar to 0.03 X 10(5) to 9.9 x 10(5) CE/g-dry wt. The E. coli concentrations in CR and AB increased toward present day, and ranged from 0.14 X 10(7) to 1.7 X 10(7) CE/g-dry wt, and 1.8 X 10(6) to 8.5 X 10(6) CE/g-dry wt, respectively. Enterococci was associated with population and river discharge, while E. coli was associated with population, air temperature, and N and C concentrations (p < 0.05). Sediments retain records of the abundance of fecal indicator bacteria, and offer a way to evaluate responses to increased population, nutrient loading, and environmental policies.
引用
收藏
页码:6902 / 6911
页数:10
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