Division of Forestry and Natural Resources, Davis College of Agriculture, Natural Resources and Design, West Virginia University, Percival Hall, Morgantown, WV 26506, USA.
The Donald Danforth Plant Science Center, 975 N. Warson Rd, St. Louis, MO 63132, USA.
Int J Environ Res Public Health. 2022 Oct 26;19(21):13907. doi: 10.3390/ijerph192113907.
Land-use practices can greatly impact water quality. and Enterococcus are accepted water quality indicators. However, surprisingly little research has been conducted comparing both organisms' population density relationships to land use practices and water quality. Stream water grab samples were collected monthly ( = 9 months) from 22 stream monitoring sites draining varying land use practice types in a representative mixed-land-use watershed of the northeastern United States. and enterococci colony forming units (CFU per 100 mL) were estimated ( = 396) and statistically analyzed relative to land use practices, hydroclimate, and pH, using a suite of methods, including correlation analysis, Principal Components Analysis (PCA), and Canonical Correspondence Analysis (CCA). Correlation analyses indicated significant ( < 0.05) relationships between fecal indicator bacteria concentrations, water quality metrics and land use practices but emphasized significant ( < 0.05) negative correlations between pH and instream enterococci concentrations. PCA and CCA results indicated consistent spatial differences between fecal indicator bacteria concentrations, pH, and land use/land cover characteristics. The study showed that pH could be considered an integrated proxy variable for past (legacy) and present land use practice influences. Results also bring to question the comparability of and enterococci relative to dominant land use practices and variations in pH and provide useful information that will help guide land use practice and water pollutant mitigation decision making.
土地利用方式对水质有很大的影响。粪肠球菌和肠球菌被认为是水质的指标。然而，令人惊讶的是，关于这两种生物的种群密度与土地利用方式和水质的关系，几乎没有研究。从美国东北部一个具有代表性的混合土地利用流域中，每月（共 9 个月）从 22 个溪流监测点采集溪流水样。对 9 个月的 396 个水样中的粪肠球菌和肠球菌进行了估计（每 100 毫升的菌落形成单位（CFU）），并使用一系列方法（包括相关分析、主成分分析（PCA）和典范对应分析（CCA））对其与土地利用方式、水气候和 pH 值进行了统计分析。相关分析表明，粪便指示菌浓度、水质指标和土地利用方式之间存在显著的（<0.05）关系，但强调了 pH 值与溪流中肠球菌浓度之间存在显著的（<0.05）负相关。PCA 和 CCA 的结果表明，粪便指示菌浓度、pH 值和土地利用/土地覆盖特征之间存在一致的空间差异。研究表明，pH 值可以被视为过去（遗留）和现在土地利用方式影响的综合代理变量。研究结果还质疑了粪肠球菌和肠球菌相对于主要土地利用方式和 pH 值变化的可比性，并提供了有用的信息，有助于指导土地利用方式和水污染缓解决策。
