Long-term variations in dissolved silicate, nitrogen, and phosphorus flux from the Yangtze River into the East China Sea and impacts on estuarine ecosystem

Li, Maotian; Xu, Kai; Watanabe, Masataka; Chen, Zhongyuan

doi:10.1016/j.ecss.2006.08.013

Cited by 370 publications

(220 citation statements)

References 24 publications

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“…In contrast, DSi decreased by ~50% over the same period [3,4]. Similar nutrient changes have been reported in the Yangtze River, where dissolved inorganic nitrogen (DIN) and soluble reactive phosphorus (SRP) concentrations increased sharply from 1960 to 2000 [5,6], while DSi dropped from 130 mol L 1 in 1960 to 80 mol L 1 in 1985 [4,6,7]. The major reasons for this are also related to chemical fertilizer application, population growth and dam construction [5,6].…”

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confidence: 61%

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Distribution, fluxes and decadal changes of nutrients in the Jiulong River Estuary, Southwest Taiwan Strait

et al. 2012

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The Jiulong River Estuary (JRE) is a typical subtropical macro-tide estuary on the southwest coast of the Taiwan Strait (TWS), which has been greatly impacted by human activities over the past 30 years. To understand nutrient dynamics and fluxes under such a heavy background of anthropogenic perturbation, eight cruises were conducted from April 2008 to April 2011, covering both wet (May to September) and dry (October to April next year) seasons. Nutrient concentrations were very high for the freshwater end-member in the upper reach of the JRE (nitrate (NO 3 In dry seasons, concentrations of these nutrients were higher than in wet seasons. Nitrate was the dominant chemical species of dissolved inorganic nitrogen (DIN), with percentages of 67%-96% in wet seasons and 55%-72% in dry seasons. Distributions of NO 3 -N and DSi against salinity were nearly constant during all cruises, and showed generally conservative mixing behaviors in the estuary (1

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confidence: 61%

“…This is much different from the Yangtze, Mississippi and many other large rivers in which DSi largely declined over past decades [3][4][5][6][7]. A possible explanation is that the numerous hydropower stations along the Jiulong River are typically small and regulated daily [16].…”

Section: Characteristics and Decadal Changes Of Jre Nutrientsmentioning

confidence: 99%

Distribution, fluxes and decadal changes of nutrients in the Jiulong River Estuary, Southwest Taiwan Strait

et al. 2012

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“…Lake eutrophication has been showing a rapidly increasing trend since 2000, with serious algal bloom crisis in Dianchi Lake in 2001 and in Taihu Lake in 2007 (Qin et al 2007;Gao and Zhang 2010). Nitrogen concentrations in large rivers, especially the Yangtze and Yellow river, have been increasing in recent years (Li et al 2007;Yu et al 2010). The estuaries and coastal water near cities are seriously polluted, and the annual frequency of red tides has increased from 28 in 2000 to 68 in 2008 with a cumulative area of 13,738 km 2 (SEPA 2000(SEPA -2008.…”

Section: Status Of Non-point Source Pollution From Crop Production Inmentioning

confidence: 99%

Agricultural Non-Point Source Pollution in China: Causes and Mitigation Measures

Sun

Zhang

Yang

et al. 2012

AMBIO

478

199

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Non-point source (NPS) pollution has been increasingly serious in China since the 1990s. The increases of agricultural NPS pollution in China is evaluated for the period 2000-2008 by surveying the literature on water and soil pollution from fertilizers and pesticides, and assessing the surplus nitrogen balance within provinces. The main causes for NPS pollution were excessive inputs of nitrogen fertilizer and pesticides, which were partly the result of the inadequate agricultural extension services and the rapid expansion of intensive livestock production with little of waste management. The annual application of synthetic nitrogen fertilizers and pesticides in China increased by 50.7 and 119.7%, respectively, during 1991-2008. The mitigation measures to reduce NPS pollution include: correct distortion in fertilizer prices; improve incentives for the recycling of organic manure; provide farmers with better information on the sound use of agro-chemicals; and tighten the regulations and national standards on organic waste disposal and pesticides use.

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“…Since the 1980s, many Chinese rivers have experienced a significant increase in nutrient concentrations and loads associated with intensive crop cultivation, livestock production, human population expansion, and urbanization (Liu et al, 2003;Li et al, 2007;Yu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Reconstructing historical changes in phosphorus inputs to rivers from point and nonpoint sources in a rapidly developing watershed in eastern China, 1980–2010

Chen

Guo

et al. 2015

Science of The Total Environment

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Long-term variations in dissolved silicate, nitrogen, and phosphorus flux from the Yangtze River into the East China Sea and impacts on estuarine ecosystem

Cited by 370 publications

References 24 publications

Distribution, fluxes and decadal changes of nutrients in the Jiulong River Estuary, Southwest Taiwan Strait

Distribution, fluxes and decadal changes of nutrients in the Jiulong River Estuary, Southwest Taiwan Strait

Agricultural Non-Point Source Pollution in China: Causes and Mitigation Measures

Reconstructing historical changes in phosphorus inputs to rivers from point and nonpoint sources in a rapidly developing watershed in eastern China, 1980–2010

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