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Impact of human activities on phosphorus flows on an early eutrophic plateau: A case study in Southwest China

文献类型： 外文期刊

作者： Li, Ying 1 ; Yen, Haw 2 ; Lei, Qiuliang 1 ; Qiu, Weiwen 3 ; Luo, Jiafa 4 ; Lindsey, Stuart 4 ; Qin, Lihuan 1 ; Zhai, Lime 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Nonpoint Source Pollut Control, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China

2.Texas A&M Univ, Blackland Res & Extens Ctr, Texas A&M Agrilife Res, Temple, TX 76502 USA

3.New Zealand Inst Plant & Food Res Ltd, Private Bag 4704, Christchurch 8140, New Zealand

4.Ruakura Res Ctr, AgRes, 10 Bisley Rd, Hamilton 3214, New Zealand

5.Yunnan Acad Agr Sci, Inst Agr Resources & Environm, Kunming 650205, Yunnan, Peoples R China

6.Liaoning Prov Dept Nat Resources, Shenyang 110032, Peoples R China

关键词： Southwest China; Erhai Lake Basin; Phosphorus; Net anthmpogenic phosphorus inputs (NAPI); Anthropogenic activities

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 714 卷

页码：

收录情况： SCI

摘要： The net anthropogenic phosphorus inputs (NAPI) model has been used extensively to assess changes in phosphorus (P) inputs and cycling in the environment. However, temporary populations have generally been unconsidered in these assessments. In this study, the NAPI model was used to estimate P loads from the 16 towns and villages in the Erhai Lake Basin (ELB), Southwest China and to evaluate the potential impact from temporary residents ( tourism). The results showed that the average value P inputs in the basin (estimated at 2384 kg P km(-2) year(-1)) were 5 times the national average level, and that temporary residents contributed 1%. Agriculture accounted for most of the net P. with chemical fertilizers (55% of the inputs) as the main source, followed by food and animal feed. Only 9.54% of the P inputs to the basin were exported. River water quality and NAPI were significantly correlated (P < 0.01). Tourism industry contributes significantly to regional economic growth and prosperity, but its beneficial effects on the economy does not equate with the adverse impact on environment. This study illustrates what is happening in Southwest China and provides scientific evidence that shows we need to find novel ways to reduce nutrients. (C) 2020 Elsevier B.V. All rights reserved.

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