Human activities have distinctly enhanced the deposition levels of atmospheric nitrogen (N) pollutants into terrestrial ecosystems, but whether and to what extents soil carbon (C) and N status have been influenced by elevated N inputs remain poorly understood in the 'real' world given related knowledge has largely based on N-addition experiments. Here we reported soil organic C (OC) and total N (TN) for twenty-seven forests along a gradient of N deposition (22.4-112.9 kg N/ha/yr) in the Beijing-Tianjin-Hebei (BTH) region of northern China, a global hotspot of high N pollution. Levels of soil TN in forests of the BTH region have been elevated compared with investigations in past decades, suggesting that long-term N deposition might cause soil TN increases. Combining with major geographical and environmental factors among the study forests, we found unexpectedly that soil moisture and pH values rather than N deposition levels were major regulators of the observed spatial variations of soil OC and TN contents. As soil moisture and pH values increased with mean annual precipitation and temperature, respectively, soil C and N status in forests of the BTH region might be more responsive to climate change than to N pollution. These evidence suggests that both N deposition and climate differences should be considered into managing ecosystem functions of forest resources in regions with high N pollution.
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http://dx.doi.org/10.1016/j.scitotenv.2020.136620 | DOI Listing |
Environ Pollut
January 2025
School of Public Policy and Administration, Xi'an Jiaotong University, Xi'an, 710049, China.
Air pollution carries different disease burdens across all age groups, with the elderly and children being the most affected. Therefore, it is of practical significance to study air pollution exposure characteristics of different age groups in the context of accelerating aging in China. In this study, we used the number of people and air pollutant concentration data at the township-level scale (the smallest administrative unit in China) to calculate population-weighted PM concentration exposure (PM PWE) values of different age groups in the Beijing-Tianjin-Hebei (BTH) region, quantified the pollution exposure disparities among different groups, and analyzed the spatiotemporal changes in such differences and their driving factors.
View Article and Find Full Text PDFJ Clin Gastroenterol
January 2025
Division of Gastroenterology and Hepatology, Virginia Mason Medical Center, Seattle, WA.
Background And Aims: Gastric outlet obstruction (GOO) is a clinical manifestation of mechanical obstruction at the antropyloric region or proximal small bowel. The goal of endoscopic management is to relieve the obstruction so patients can resume per oral intake. Most studies have focused on malignant causes of GOO; yet only a handful have explored outcomes related to benign etiologies.
View Article and Find Full Text PDFPLoS One
December 2024
School of Economics and Management, Yanshan University, Qinhuangdao, China.
Background: Internet searches offer an indicator of public attention and possible demand for certain things. Studying the spatiotemporal characteristics of the public's concern for vaccination can determine the spatiotemporal distribution of demand for vaccines in China, and capture the changes in the health awareness of the Chinese population, thus informing future vaccination strategies.
Methods: Based on the collection of Baidu search indices for vaccination-related keywords in 363 cities in China, This paper seeks to explore the spatiotemporal changes and regional differences in public attention toward vaccination in China by using the seasonal index, seasonal concentration index, Herfindahl index, Moran index, and Dagum Gini coefficient.
J Environ Manage
December 2024
Business School, Shanghai University of Finance and Economics, Shanghai, 200080, PR China. Electronic address:
Amidst the global consensus on green transformation and sustainable development, the digital economy has emerged as a pivotal catalyst for enhancing carbon emission efficiency. Analyzing panel data of 49 cities in Beijing-Tianjin-Hebei (BTH), Yangtze River Delta (YRD), and Pearl River Delta (PRD) from 2011 to 2022, this study explores the U-shaped journey of the digital economy towards green development. The rebound effect on energy consumption from early digital infrastructure investments delays the long-term benefits of digital applications in boosting carbon performance, and the thresholds of DE in BTH, YRD, and PRD regions are 0.
View Article and Find Full Text PDFHuan Jing Ke Xue
December 2024
School of Economics and Management, Hebei University of Technology, Tianjin 300401, China.
With the rapid development of urbanization in China, the energy consumption and carbon emissions in the building sector will continue to grow. Therefore, the future dynamic evolution of building carbon emissions must be crucially investigated to achieve the "dual carbon" target in China. A system dynamics model of "urbanization-building carbon emissions" was constructed from the perspective of urbanization for revealing the mechanism of urbanization-related factors on building carbon emissions.
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