Impoundment-induced nitrogen–phosphorus imbalance in cascade reservoirs alleviated by input of anthropogenic nutrients
Impoundment-induced nitrogen–phosphorus imbalance in cascade reservoirs alleviated by input of anthropogenic nutrients
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人为养分的输入缓解了梯级水库蓄水引起的氮磷失衡
DOI：
10.1080/20442041.2018.1457853
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发表时间：
2018-04
期刊：
影响因子：
3.1
通讯作者：
Kevin M. Yeager
中科院分区：
文献类型：
--
作者：
Dan YAng;Shilu Wang;Weiqi Lu;Peng Xiang;Yuxue Yang;Di Tan;Mingwei Guo;Kevin M. Yeager
氮磷比（N：P）是一个重要的营养限制变量，与水环境中的赤潮和富营养化等生态问题密切相关。水库对磷的截留率一般比对氮的截留率高得多。这种N、P地球化学循环的内在差异可能导致下游河流和水库N、P化学计量失衡，从而导致N：P比值增大，加剧P限制。本文测定了乌江、澜沧江流域梯级水库中总氮（TN）和总磷（TP）的浓度。结果表明，两个流域的TN：TP比值在下游均呈倒V型变化。我们发现，P不仅保留水库更有效地比N，但也以更快的速度比N的人为影响补充，因此，这些蓄水引起的N-P不平衡在下游很短的距离内得到缓解。我们的研究表明，梯级水库的建设并不一定会导致严格的磷缺乏和下游的N：P比值过高。
The ratio of nitrogen to phosphorus (N:P) is an important variable that has a close relationship with the ecological problems of nuisance algal blooms and eutrophication in aquatic environments in terms of nutrient limitation. Reservoirs generally have much higher retention efficiency for P than for N. This inherent dissimilarity in the N and P biogeochemical cycles likely results in N–P stoichiometric imbalance in downstream rivers and reservoirs, consequently causing an increase in the N:P ratio and aggravating P limitation. Here we determined the total N (TN) and total P (TP) concentrations in the cascade reservoirs of the Wujiang River and Lancangjiang River basins. The results show that TN:TP ratios in these 2 basins exhibited a common inverted V-shaped (∧) pattern downstream. We found that P is not only retained by reservoirs more efficiently than N but is also replenished at faster rates than N given anthropogenic impacts; consequently, the N–P imbalance caused by these impoundments is alleviated within a short distance downstream.because of inputs of anthropogenic nutrients. Our research suggests that construction of cascade reservoirs does not necessarily lead to strict P deficiency and anomalously high N:P ratios downstream.
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DOI：
10.1029/2012jg002148
发表时间：
2013-03
期刊：
Journal of Geophysical Research: Biogeosciences
影响因子：
--
作者：
S. Powers;J. P. Julian;M. Doyle;E. Stanley
通讯作者：
S. Powers;J. P. Julian;M. Doyle;E. Stanley
DOI：
--
发表时间：
2008
期刊：
Huan jing ke xue= Huanjing kexue
影响因子：
--
作者：
Cheng-jin Cao;Yan-wen Qin;B. Zheng;Min-sheng Huang
通讯作者：
Cheng-jin Cao;Yan-wen Qin;B. Zheng;Min-sheng Huang
影响因子：
4
作者：
Green, Mark B.;Finlay, Jacques C.
通讯作者：
Finlay, Jacques C.
DOI：
--
发表时间：
2013
期刊：
Earth and Environment
影响因子：
--
作者：
Zhang Siyu
通讯作者：
Zhang Siyu
DOI：
10.18307/2003.0106
发表时间：
2003
期刊：
Journal of Lake Science
影响因子：
--
作者：
Zhang En-ren;Z. Jing
通讯作者：
Zhang En-ren;Z. Jing