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首页> 外文期刊>Environmental Science & Technology >Beach Nourishment Impacts on Bacteriological Water Quality and Phytoplankton Bloom Dynamics
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Beach Nourishment Impacts on Bacteriological Water Quality and Phytoplankton Bloom Dynamics

机译：海滩营养对细菌学水质和浮游植物绽放动态的影响

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摘要

A beach nourishment with approximately 1/3 fine-grained sediment (fines; particle diameter <63 μm) by mass was performed at Southern California's Border Fields State Park (BFSP). The nourishment was found to briefly (<1 day) increase concentrations of surf-zone fecal indicator bacteria (FIB) above single-sample public health standards [104 most probable number (MPN)·(100 mL)~(-1)] but had no effect on phytoplankton. Contamination was constrained to the nourishment site: waters 300 m north or south of the nourishment were always below single-sample and geometric mean [≤35 MPN·(l00 mL)~(-1)] standards. Nourishment fines were identified as a source of the fecal indicator Enterococcus; correlations between fines and enterococci were significant (p < 0.01), and generalized linear model analysis identified fines as the single best predictor of enterococci. Microcosm experiments and field sampling suggest that the short surf-zone residence times observed for enterococci (e-folding time 4 h) resulted from both rapid, postplacement FIB inactivation and mixing/transport by waves and alongshore currents. Nourishment fines were phosphate-richitrogen-poor and were not correlated with surf-zone phytoplankton concentrations, which may have been nitrogen-limited
机译：在南加州的边疆场州立公园（BFSP）进行了以质量计约1/3的细颗粒沉积物（细粒；粒径<63μm）的海滩养料。发现这种营养会短暂（<1天）使冲浪区粪便指示菌（FIB）的浓度增加到单样本公共卫生标准之上[104最可能数（MPN）·（100 mL）〜（-1）]，但对浮游植物没有影响。污染被限制在营养位点：在营养位以北或南部300 m的水域始终低于单一样本和几何平均值[≤35MPN·（100 mL）〜（-1）]标准。营养罚款被确定为粪便指标肠球菌的来源。罚款与肠球菌之间的相关性很显着（p <0.01），广义线性模型分析确定罚款是肠球菌的唯一最佳预测指标。缩影实验和现场采样表明，肠道球菌观察到的冲浪区停留时间短（电子折叠时间为4小时）是由于放置后FIB快速失活以及海浪和沿岸洋流混合/运输造成的。营养罚款是富含磷酸盐/缺乏氮的，与海带浮游植物的浓度无关，而浮游植物的浓度可能受到氮的限制

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  • 来源
    《Environmental Science & Technology》 |2013年第12期|6146-6154|共9页
  • 作者

    M. A. Rippy; P. J. S. Franks; F. Feddersen; R. T. Guza; J. A. Warrick;

  • 作者单位

    Scripps Institution of Oceanography, La Jolla, California 92093, United States;

    Scripps Institution of Oceanography, La Jolla, California 92093, United States;

    Scripps Institution of Oceanography, La Jolla, California 92093, United States;

    Scripps Institution of Oceanography, La Jolla, California 92093, United States;

    United States Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California 95060, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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