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首页> 外文期刊>Southeastern naturalist >The Effect of Beaver Ponds on Water Quality in Rural Coastal Plain Streams
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The Effect of Beaver Ponds on Water Quality in Rural Coastal Plain Streams

机译：海狸池塘对农村沿海普通溪流水质的影响

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We compared water-quality effects of 13 beaver ponds on adjacent free-flowing control reaches in the Coastal Plain of rural North Carolina. We measured concentrations of nitrate, ammonium, soluble reactive phosphorus (SRP), and suspended sediment (SS) upstream and downstream of paired ponds and control reaches. Nitrate and SS concentrations decreased, ammonium concentrations increased, and SRP concentrations were unaffected downstream of the ponds and relative to the control reaches. The pond effect on nitrate concentration was a reduction of 112 +/- 55 mu g-N/L (19%) compared to a control-reach-influenced reduction of 28 +/- 17 mu g-N/L. The pond effect on ammonium concentration was an increase of 9.47 +/- 10.9 mu g-N/L (59%) compared to the control-reach-influenced reduction of 1.49 +/- 1.37 mu g-N/L. The pond effect on SS concentration was a decrease of 3.41 +/- 1.68 mg/L (40%) compared to a control-reach-influenced increase of 0.56 +/- 0.27 mg/L. Ponds on lower-order streams reduced nitrate concentrations by greater amounts compared to those in higher-order streams. Older ponds reduced SS concentrations by greater amounts compared to younger ponds. The findings of this study indicate that beaver ponds provide water-quality benefits to rural Coastal Plain streams by reducing concentrations of nitrate and suspended sediment.
机译：我们比较了13海狸池塘对邻近自由流动控制的水质效应在北卡罗来纳州北卡罗来纳州沿海平原。我们测量硝酸盐，铵，可溶性反应性磷（SRP）和悬浮沉积物（SS）的浓度上游和悬浮的池塘和对照到达。硝酸盐和Ss浓度降低，浓度增加，并且SRP浓度不受池塘的下游和相对于对照。与对照达到的对照影响的28 +/-17μg-n / l相比，对硝酸盐浓度的池塘效应为112 +/-55μg（19％）。与对照达到的对照达到的1.49 +/-1.37μg-n / l相比，池塘浓度对铵浓度的影响增加了9.47 +/-10.9μg-n / l（59％）。与对照达到影响的0.56 +/- 0.27 mg / L相比，对SS浓度的池浓度对3.41 +/- 1.68mg / L（40％）的影响降低。与高阶流中的那些相比，较低阶流上的池塘将硝酸盐浓度降低了更大的量。与年轻池塘相比，较旧的池塘将SS浓度减少了更大的数量。本研究的调查结果表明，海狸池塘通过减少硝酸盐和悬浮沉积物的浓度为农村沿海普通溪流提供水质益处。

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