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CONCENTRATIONS AND FLUXES OF DISSOLVED NUTRIENTS IN THE YANGTZE RIVER: LONG-TERM TRENDS AND ECOLOGICAL

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4,   Pages 559-567 doi: 10.15302/J-FASE -2020344

Abstract:

Intensifying human activity in the Yangtze River basin has substantially increased nutrient concentrations in the Yangtze River Estuary, leading to degradation of the coastal environment. Analysis of nutrient determinations published over the past 50 years reveals a gradual decreasing trend in the concentrations and fluxes of dissolved silicate (DSi). However, both dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphate (DIP) concentrations have increased significantly since the 1970s. The frequency of and area covered by red tide outbreaks have increased greatly during this period, mainly due to changes in nutrient supply ratios [i.e., N/P (DIN/DIP), N/Si (DIN/DSi), P/Si (DIP/DSi)]. A strong correlation was found between the riverine DIN fluxes and the estimated DIN inputs from the major N sources, particularly fertilizers and atmospheric deposition. The data provide a comprehensive assessment of nutrients in the Yangtze River basin and their ecological impacts and indicate a potentially significant influence of atmospheric deposition on DIN loadings and fluxes.

 

Keywords: atmospheric deposition / ecological impacts / nitrogen sources / nutrients / Yangtze delta    

CONCENTRATIONS AND FLUXES OF DISSOLVED NUTRIENTS IN THE YANGTZE RIVER: LONG-TERM TRENDS AND ECOLOGICAL

Yandan FU, Jiahui KANG, Ziyue LI, Xuejun LIU, Wen XU

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4,   Pages 559-567 doi: 10.15302/J-FASE-2020344

Abstract: Intensifying human activity in the Yangtze River Basin (YRB) has substantially increased nutrient concentrations in the Yangtze River Estuary, leading to degradation of the coastal environment. Analysis of nutrient determinations published over the past 50 years reveals a gradual decreasing trend in the concentrations and fluxes of dissolved silicate (DSi). However, both dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphate (DIP) concentrations have increased significantly since the 1970s. The frequency and area covered by red tide outbreaks have increased greatly during this period, mainly due to changes in nutrient supply ratios [i.e., N/P (DIN/DIP), N/Si (DIN/DSi), P/Si (DIP/DSi)]. A strong correlation was found between the riverine DIN fluxes and the estimated DIN inputs from the major N sources, particularly fertilizers and atmospheric deposition. The data provide a comprehensive assessment of nutrients in the YRB and their ecological impacts and indicate a potentially significant influence of atmospheric deposition on DIN loadings and fluxes.

Keywords: atmospheric deposition     ecological impacts     nitrogen sources     nutrients     Yangtze River Delta    

Long-term trends of fine particulate matter and chemical composition in the Pearl River Delta Economic

Xuemei WANG,Weihua CHEN,Duohong CHEN,Zhiyong WU,Qi Fan

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 53-62 doi: 10.1007/s11783-014-0728-z

Abstract: Understanding the trends in PM levels is essential for formulating clean air plans.The long-term variation in PM mass concentration is analyzed.These results provide, for the first time, a better understanding of the long-term PM characteristicsand trends, on a species-by-species basis, in the PRDEZ.

Keywords: long-term trends     fine particulate matter     chemical components     Pearl River Delta Economic Zone (PRDEZ)    

Stabilization-based soil remediation should consider long-term challenges

Zhengtao Shen, Zhen Li, Daniel S. Alessi

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 2, doi: 10.1007/s11783-018-1028-9

Abstract: However, there are emerging challenges regarding the long-term performance of the technology, which maystem from a research gap regarding the development of accurate, quantitative laboratory simulations of long-termTherefore, field trials coupled with long-term monitoring are critical to further verify conditions underSustainability is also an important factor affecting the long-term stability of site remediation.

Keywords: Stabilization     Soil remediation     Long-term     Trace metals    

Effects of coarse and fine aggregates on long-term mechanical properties of sea sand recycled aggregate

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 754-772 doi: 10.1007/s11709-021-0711-2

Abstract: Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregateFinally, an analytical expression is suggested to construct the long-term stress–strain curve of SSRAC

Keywords: aggregate concrete     recycled coarse aggregate replacement percentage     sea sand chloride ion content     long-term    

A perspective of “Nuclear Hot Spring” for long-term sustainable economy of the world

Yingzhong LU

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 349-357 doi: 10.1007/s11708-011-0168-4

Abstract: The rapid growth of human economy in the late 20th century gave rise to great concern over sustainability of the world. A pessimistic “Full World Model” forecasts that human economy could not develop further. The nuclear fission (and fusion later), however, could release huge amount of energy to create sufficient useful material resources and turn the said pessimistic modelinto a new optimistic “Sustainable World Model”.The dilemma of nuclear energy (Military Giant vs. Civil Dwarf) jeopardizes its performance as a “Technologic Fixer”. According to Mother Nature’s teachings, the elimination of the root-causes of the design-based risk factors could solve this problem. Recent technology break-through from inherent safety to natural safety has been made in China. The proposed full-power natural circulation “Nuclear Hot Spring (NHS)” reactor could operate solely on natural forces without complex man-made coolant circulation equipment and human-operated control systems. The cheap, unlimited supply of energy from nuclear energy could change the geopolitics forever, and finally eliminate the root-causes of most international and regional conflicts.

Keywords: natural safety reactor     full power natural circulation     sustainable world economy    

Long-term adaptive evolution of

Yong Xiao, Changye Xiao, Feng Zhao

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1182-8

Abstract: remains uncertain how microorganisms acquire resistance to high concentrations of pollutants during long-termS. oneidensis MR-1 is improved by acclimation, as well as a genetic understanding of the impact of long-term

Keywords: Environmental biotechnology     Acclimation     Chromate resistance     Efflux pumps     Detoxification    

Long-term exposure to air pollution and cerebrovascular disease: findings from Beijing Health Management

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1684-2

Abstract:

● This study explored the long-term association by double robust

Keywords: Air pollution     Cerebrovascular disease     Incidence     Long-term exposure     Doubly robust additive model    

Elucidate long-term changes of ozone in Shanghai based on an integrated machine learning method

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1738-5

Abstract:

● A novel integrated machine learning method to analyze O3 changes is proposed.

Keywords: Ozone     Integrated method     Machine learning    

The medium- and long-term sustainable supply approaches and strategies for essential and typical strategic

Frontiers of Engineering Management doi: 10.1007/s42524-024-4048-0

Abstract: The medium- and long-term sustainable supply approaches and strategies for essential and typical strategic

Keywords: term supply approaches    

Mycophenolate mofetil or tacrolimus compared with azathioprine in long-term maintenance treatment for

Frontiers of Medicine 2022, Volume 16, Issue 5,   Pages 799-807 doi: 10.1007/s11684-021-0849-2

Abstract: Long-term maintenance therapies with MMF or TAC might have similarly low rates of renal relapse and similar

Keywords: lupus nephritis     mycophenolate mofetil     tacrolimus     maintenance therapy    

Sustainable Plasticulture in Chinese Agriculture: a Review of Challenges and Routes to Achieving Long-term REVIEW

Frontiers of Agricultural Science and Engineering 2024, Volume 11, Issue 1,   Pages 155-168 doi: 10.15302/J-FASE-2023508

Abstract: the effectiveness of these policies and proposes possible future innovations to promote increases in long-term

Keywords: circular plastics economy     crop production     food security     plastic pollution     sustainable plasticulture    

Physiological effects of weightlessness: countermeasure system development for a long-term Chinese manned

Linjie Wang, Zhili Li, Cheng Tan, Shujuan Liu, Jianfeng Zhang, Siyang He, Peng Zou, Weibo Liu, Yinghui Li

Frontiers of Medicine 2019, Volume 13, Issue 2,   Pages 202-212 doi: 10.1007/s11684-017-0587-7

Abstract: The Chinese space station will be built around 2020. As a national space laboratory, it will offer unique opportunities for studying the physiological effects of weightlessness and the efficacy of the countermeasures against such effects. In this paper, we described the development of countermeasure systems in the Chinese space program. To emphasize the need of the Chinese space program to implement its own program for developing countermeasures, we reviewed the literature on the negative physiological effects of weightlessness, the challenges of completing missions, the development of countermeasure devices, the establishment of countermeasure programs, and the efficacy of the countermeasure techniques in American and Russian manned spaceflights. In addition, a brief overview was provided on the Chinese research and development on countermeasures to discuss the current status and goals of the development of countermeasures against physiological problems associated with weightlessness.

Keywords: countermeasure     physiological effects of weightlessness     effect evaluation     long-term manned spaceflight    

Enhanced methane production during long-term UASB operation at high organic loads as enabled by the immobilized

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1505-4

Abstract:

• Fungi enable the constant UASB operation even at OLR of 25.0 kg/(m3×d).

Keywords: Anaerobic digestion     Fungi     Methane production     High OLR     Microbial community    

THE ROLE OF LONG-TERM EXPERIMENTS IN VALIDATING TRAIT-BASED APPROACHES TO ACHIEVING MULTIFUNCTIONALITY

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2,   Pages 187-196 doi: 10.15302/J-FASE-2021438

Abstract: This study demonstrated the value of focused studies of long-term experiments in grassland systems that

Keywords: multifunctional grassland systems / Park Grass Experiment / soil organic carbon / ecosystem service    

Title Author Date Type Operation

CONCENTRATIONS AND FLUXES OF DISSOLVED NUTRIENTS IN THE YANGTZE RIVER: LONG-TERM TRENDS AND ECOLOGICAL

Journal Article

CONCENTRATIONS AND FLUXES OF DISSOLVED NUTRIENTS IN THE YANGTZE RIVER: LONG-TERM TRENDS AND ECOLOGICAL

Yandan FU, Jiahui KANG, Ziyue LI, Xuejun LIU, Wen XU

Journal Article

Long-term trends of fine particulate matter and chemical composition in the Pearl River Delta Economic

Xuemei WANG,Weihua CHEN,Duohong CHEN,Zhiyong WU,Qi Fan

Journal Article

Stabilization-based soil remediation should consider long-term challenges

Zhengtao Shen, Zhen Li, Daniel S. Alessi

Journal Article

Effects of coarse and fine aggregates on long-term mechanical properties of sea sand recycled aggregate

Journal Article

A perspective of “Nuclear Hot Spring” for long-term sustainable economy of the world

Yingzhong LU

Journal Article

Long-term adaptive evolution of

Yong Xiao, Changye Xiao, Feng Zhao

Journal Article

Long-term exposure to air pollution and cerebrovascular disease: findings from Beijing Health Management

Journal Article

Elucidate long-term changes of ozone in Shanghai based on an integrated machine learning method

Journal Article

The medium- and long-term sustainable supply approaches and strategies for essential and typical strategic

Journal Article

Mycophenolate mofetil or tacrolimus compared with azathioprine in long-term maintenance treatment for

Journal Article

Sustainable Plasticulture in Chinese Agriculture: a Review of Challenges and Routes to Achieving Long-term

Journal Article

Physiological effects of weightlessness: countermeasure system development for a long-term Chinese manned

Linjie Wang, Zhili Li, Cheng Tan, Shujuan Liu, Jianfeng Zhang, Siyang He, Peng Zou, Weibo Liu, Yinghui Li

Journal Article

Enhanced methane production during long-term UASB operation at high organic loads as enabled by the immobilized

Journal Article

THE ROLE OF LONG-TERM EXPERIMENTS IN VALIDATING TRAIT-BASED APPROACHES TO ACHIEVING MULTIFUNCTIONALITY

Journal Article