Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-018-0238-x |
Low buffering capacity and slow recovery of anthropogenic phosphorus pollution in watersheds | |
Goyette, J. -O.1; Bennett, E. M.2,3; Maranger, R.1 | |
2018-12-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:12页码:921-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Excess anthropogenic phosphorus in watersheds, transported with runoff, can result in aquatic eutrophication, a serious global water quality concern. Watersheds can retain phosphorus, especially in their soils, which can serve as a buffer against the effect of excessive use of phosphorus. However, whether there is a quantifiable threshold at which a watershed exceeds its optimal phosphorus buffering capacity (beyond which riverine loads would dramatically increase) remains unknown. Here we quantified a watershed phosphorus buffering capacity threshold based on accumulation data over 110 years in 23 watersheds of a large North American river basin with globally representative agricultural soils. We found a surprisingly low threshold of just 2.1t P km(-2) (0.03-8.7 t P km(-2)). Beyond this, further P inputs to watersheds cause a significant acceleration of P loss in runoff. Using a simple exponential decay model, the time estimated to eliminate legacy P via runoff in our watersheds ranges from -100 to over 2,000 years. The rapidity with which the watershed buffering threshold can be surpassed during accumulation, particularly given current anthropogenic phosphorus input rates, versus the long return to baseline suggests that new strategies to reconcile watershed activities and water quality are urgently needed. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451837900011 |
WOS关键词 | SOIL-PHOSPHORUS ; MISSING PIECE ; FRESH-WATER ; EUTROPHICATION ; INPUTS ; MANAGEMENT ; RETENTION ; DYNAMICS ; NITROGEN ; IMPACTS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34996 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Montreal, Grp Rech Interuniv Limnol & Environm Aquat GRIL, Dept Sci Biol, Montreal, PQ, Canada; 2.McGill Univ, Dept Nat Resource Sci, Montreal, PQ, Canada; 3.McGill Univ, McGill Sch Environm, Montreal, PQ, Canada |
推荐引用方式 GB/T 7714 | Goyette, J. -O.,Bennett, E. M.,Maranger, R.. Low buffering capacity and slow recovery of anthropogenic phosphorus pollution in watersheds[J]. NATURE GEOSCIENCE,2018,11(12):921-+. |
APA | Goyette, J. -O.,Bennett, E. M.,&Maranger, R..(2018).Low buffering capacity and slow recovery of anthropogenic phosphorus pollution in watersheds.NATURE GEOSCIENCE,11(12),921-+. |
MLA | Goyette, J. -O.,et al."Low buffering capacity and slow recovery of anthropogenic phosphorus pollution in watersheds".NATURE GEOSCIENCE 11.12(2018):921-+. |
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