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Gao R, Li Q, Che F, Zhang YP, Zu YG, Liu F. [ Spatial and Temporal Distribution Characteristics of Ozone Concentration and Health Benefit Assessment in the Beijing-Tianjin-Hebei Region from 2015 to 2020]. Huan Jing Ke Xue 2024; 45:2525-2536. [PMID: 38629518 DOI: 10.13227/j.hjkx.202305280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
To evaluate the spatial and temporal distribution characteristics of ambient ozone (O3) in the Beijing-Tianjin-Hebei (BTH) Region, the land use regression (LUR) model and random forest (RF) model were used to simulate the ambient O3 concentration from 2015 to 2020. Meanwhile, all-cause, cardiovascular, and respiratory mortalities as well as economic losses attributed to O3 were also estimated. The results showed that upward trends with fluctuation were observed for ambient O3 concentration, mortalities, and economic losses attributable to O3 exposure in the BTH Region from 2015 to 2020. The areas with high O3 concentration and great changes were concentrated in the central and southwestern regions, whereas the concentration in the northern region was low, and the change degree was small. The spatial distribution of the mortalities was also consistent with the spatial distribution of O3 concentration. From 2015 to 2020, the economic losses regarding all-cause mortality and cardiovascular mortality increased in 13 cities of the BTH Region, whereas the economic losses of respiratory mortality decreased in 4 cities in the BTH Region. The results indicated that the priority areas for O3 control were not uniform. Specifically, Beijing, Tianjin, Hengshui, and Xingtai were vital areas for O3 pollution control in the BTH Region. Differentiated control measures should be adopted based on the characteristics of these target areas to decline O3 concentration and reduce health impacts and economic losses associated with O3 exposure.
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Affiliation(s)
- Ran Gao
- Beijing Municipal Key Laboratory of Clinical Epidemiology, Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Qin Li
- Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Fei Che
- Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yan-Ping Zhang
- Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yong-Gang Zu
- Langfang Economic and Technological Development Zone Health Supervision Institute, Langfang 065001, China
| | - Fen Liu
- Beijing Municipal Key Laboratory of Clinical Epidemiology, Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, Beijing 100069, China
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2
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Peralta G, CaraDonna PJ, Rakosy D, Fründ J, Pascual Tudanca MP, Dormann CF, Burkle LA, Kaiser-Bunbury CN, Knight TM, Resasco J, Winfree R, Blüthgen N, Castillo WJ, Vázquez DP. Predicting plant-pollinator interactions: concepts, methods, and challenges. Trends Ecol Evol 2024; 39:494-505. [PMID: 38262775 DOI: 10.1016/j.tree.2023.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 12/06/2023] [Accepted: 12/11/2023] [Indexed: 01/25/2024]
Abstract
Plant-pollinator interactions are ecologically and economically important, and, as a result, their prediction is a crucial theoretical and applied goal for ecologists. Although various analytical methods are available, we still have a limited ability to predict plant-pollinator interactions. The predictive ability of different plant-pollinator interaction models depends on the specific definitions used to conceptualize and quantify species attributes (e.g., morphological traits), sampling effects (e.g., detection probabilities), and data resolution and availability. Progress in the study of plant-pollinator interactions requires conceptual and methodological advances concerning the mechanisms and species attributes governing interactions as well as improved modeling approaches to predict interactions. Current methods to predict plant-pollinator interactions present ample opportunities for improvement and spark new horizons for basic and applied research.
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Affiliation(s)
- Guadalupe Peralta
- Multidisciplinary Institute of Plant Biology, National Council for Scientific and Technical Research (CONICET)-National University of Córdoba, Córdoba, X5016GCN, Argentina.
| | - Paul J CaraDonna
- Chicago Botanic Garden, Negaunee Institute for Plant Conservation Science and Action, Glencoe, IL 60022, USA; Plant Biology and Conservation, Northwestern University, Evanston, IL 60201, USA
| | - Demetra Rakosy
- Department for Community Ecology, Helmholtz Centre for Environmental Research (UFZ), Leipzig 04318, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig 04103, Germany
| | - Jochen Fründ
- Biometry and Environmental System Analysis, University of Freiburg, Freiburg 79098, Germany; Animal Network Ecology, Department of Biology, University of Hamburg, Hamburg 20148, Germany
| | - María P Pascual Tudanca
- Argentine Institute for Dryland Research, National Council for Scientific and Technical Research (CONICET)-National University of Cuyo, Mendoza 5500, Argentina
| | - Carsten F Dormann
- Biometry and Environmental System Analysis, University of Freiburg, Freiburg 79098, Germany
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT 59717, USA
| | - Christopher N Kaiser-Bunbury
- Centre for Ecology and Conservation, Faculty of Environment, Science and Economy, University of Exeter, Penryn Campus, Penryn TR10 9FE, UK
| | - Tiffany M Knight
- Department for Community Ecology, Helmholtz Centre for Environmental Research (UFZ), Leipzig 04318, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig 04103, Germany; Institute of Biology, Martin Luther University Halle-Wittenberg, Halle (Saale) 06108, Germany
| | - Julian Resasco
- Department of Ecology & Evolutionary Biology, University of Colorado, Boulder, CO 80309, USA
| | - Rachael Winfree
- Department of Ecology, Evolution & Natural Resources, Rutgers University, New Brunswick, NJ 08901, USA
| | - Nico Blüthgen
- Ecological Networks Lab, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - William J Castillo
- Biometry and Environmental System Analysis, University of Freiburg, Freiburg 79098, Germany
| | - Diego P Vázquez
- Argentine Institute for Dryland Research, National Council for Scientific and Technical Research (CONICET)-National University of Cuyo, Mendoza 5500, Argentina; Faculty of Exact and Natural Sciences, National University of Cuyo, Mendoza M5502, Argentina.
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Ma Y, Sun C, Bi JL, Zhang BT, Liu Y, Shao P, Liu T, Wang SR, Zhong WJ. [Spatial-temporal Distribution and Source Analysis of Polycyclic Aromatic Hydrocarbons in the Sediments of Poyang Lake]. Huan Jing Ke Xue 2024; 45:1492-1501. [PMID: 38471864 DOI: 10.13227/j.hjkx.202304004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
The concentrations, spatial-temporal distribution, and influencing factors of 16 polycyclic aromatic hydrocarbons (PAHs) in the sediments of Poyang Lake were studied, and a quantitative source analysis of PAHs in different areas of the lake was conducted. PAHs were widespread within the sediments. The concentrations of ∑16PAHs in the surface sediments of all sites ranged from 203 to 2 318 μg·kg-1. The concentrations of PAHs in the surface sediments of the lake body were higher than those in the surface sediments of the inlet rivers. The ratio of PAHs in Poyang Lake was 4 rings > 5 rings > 6 rings > 3 rings > 2 rings; the composition of 4-ring PAHs was dominant, and its content accounted for 86.11% of ∑16PAHs. The 2- and 3-ring and some 4-ring PAHs, including Flua and Pyr, were more susceptible to SOM, and the 4 through 6-ring PAHs were more susceptible to ORP and heavy metals and other environmental factors. Spatially, the higher concentration of ∑16PAHs occurred in the area of the lake adjacent to Duchang County and Poyang County, where the terrain was relatively closed, and the water exchange with the surrounding area was less than that in other sections, which was not conducive to the migration, transformation, and degradation of pollutants. In the temporal distribution, the changes in PAHs concentration level and the development of GDP in Jiangxi Province showed high consistency, and the influence of economic development and human activities might have been the main reason for the increasing PAHs concentration level. The main sources of PAHs in surface sediments of Poyang Lake included petroleum pollution and oil and coal and biomass combustion sources, and there were some spatial differences in PAHs sources in different regions. This study can provide a reference for PAHs pollution in surface sediments of Poyang Lake, which is important for the ecological environmental protection and management of Poyang Lake.
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Affiliation(s)
- Yan Ma
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Chen Sun
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Jia-le Bi
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Bo-Tao Zhang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Yan Liu
- Institute of Analysis and Testing, Beijing Academy of Science and Technology(Beijing Center for Physical & Chemical Analysis), Beijing 100094, China
| | - Peng Shao
- Institute of Analysis and Testing, Beijing Academy of Science and Technology(Beijing Center for Physical & Chemical Analysis), Beijing 100094, China
| | - Tong Liu
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Sheng-Rui Wang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Wen-Jun Zhong
- Wetland Ecological Resources Research Center, Jiangxi Academy of Forestry, Nanchang 330032, China
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Zhang RX, Liu YJ, Luo YN, Li JQ, Li CX, Li JJ, Zhang C. [ Spatial and Temporal Distribution and Risk Assessment of Heavy Metals in Surface Water of Changshou Lake Reservoir, Chongqing]. Huan Jing Ke Xue 2024; 45:1428-1438. [PMID: 38471858 DOI: 10.13227/j.hjkx.202304147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
To understand the water pollution status and environmental risks of Changshou Lake, the concentrations of heavy metals (Cr, Cu, Zn, As, Cd, and Pb) in the water were collected and analyzed during different seasons. The study investigated temporal and spatial variations, distribution characteristics, pollution levels, and health risks associated with heavy metals in Changshou Lake. The results showed that all six heavy metals were below than the Class Ⅰ standard of the Surface Water Environmental Quality Standard (GB 3838-2002), but recent years have witnessed an increasing trend, with Cu, As, and Pb showing a significant increase (P<0.05). The temporal and spatial distributions of these heavy metals were different. Temporally, Cr and Cd concentrations in surface water were higher in summer, As and Zn were higher in spring, and Pb and Cu were higher in autumn and winter. Spatially, the concentrations of Cr, As, Cu, Zn, and Pb showed higher concentrations in the southern outlet of the reservoir, the northwestern Longxi River inlet, and the central part of the reservoir, whereas Cd was higher in the northern stagnant area. The overall levels of heavy metals in the water body of Changshou Lake were low, with Cr and Cu slightly polluted, while other heavy metals were identified as having an insignificant pollution level. Drinking water was the primary exposure pathway to carcinogenic and non-carcinogenic heavy metals in surface water bodies. The health risk values of Cr and As in water bodies were high, ranging from 6.2×10-10 to 3.0×10-4 and 5.1×10-8 to 3.9×10-5, respectively. The corresponding contribution rates for children and adults to the total health risk were high, with Cr accounting for 87.18% and 87.20%, respectively, while As accounted for 12.73% and 12.71%, respectively. Therefore, it is crucial to prioritize environmental risks associated with Cr and Cu, as well as the health risks associated with Cr and As in Changshou Lake These findings provide a scientific foundation for water pollution control and environmental quality improvement in Changshou Lake, and rational development and utilization of water resources.
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Affiliation(s)
- Rui-Xi Zhang
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Ya-Jun Liu
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Yong-Nan Luo
- College of Resources and Environment, Southwest University, Chongqing 400715, China
- Yellow River Conservancy Commission Hydrology and Water Resources Bureau of Henan, Zhengzhou 450008, China
| | - Jie-Qin Li
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Cai-Xia Li
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Jia-Jia Li
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Cheng Zhang
- College of Resources and Environment, Southwest University, Chongqing 400715, China
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Min W, Gao MC, Sun SF, Song QQ, Qiu LP. [Distribution of Typical Resistant Bacteria and Resistance Genes in Source Water of the Middle and Lower Reaches of the Yellow River]. Huan Jing Ke Xue 2024; 45:837-843. [PMID: 38471922 DOI: 10.13227/j.hjkx.202211314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
The Yellow River water of an urban area located in the middle and lower reaches of the Yellow River was taken as the research object, in which the seasonal and along-range distribution of total culturable bacteria, typical antibiotic resistant bacteria (amoxicillin resistant bacteria and sulfamethoxazole-resistant bacteria), and their corresponding typical resistance genes [β-lactam resistance gene (blaCTX-M) and sulfamamide resistance genes (sulI and sulⅡ), as well as intⅠ1 were investigated. The results showed that the total culturable bacteria, β-lactam-resistant bacteria and sulfonamide-resistant bacteria in the Yellow River Basin were significantly affected by temperature and human activities. The composition and quantity of their genera had obvious spatiotemporal distribution characteristics, in which Bacillus and Pseudomonas were dominant in the composition and number of bacteria. The abundance of resistance genes decreased with the decrease in temperature. The proportion of β-lactam resistance genes in the total genes was higher than that of sulfanilamide genes, and sulI was the dominant gene in sulfanilamide genes. Correlation analysis showed that class Ⅰ integron played an important role in accelerating the spread of resistance genes. This study offers insight into the status quo of water resistance pollution in the Yellow River and provides theoretical support for the risk assessment of resistance genes in the middle and lower reaches of the Yellow River Basin.
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Affiliation(s)
- Wei Min
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
| | - Ming-Chang Gao
- School of Conservancy and Environment, University of Jinan, Jinan 250022, China
| | - Shao-Fang Sun
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
- Shandong Province Engineering Technology Research Center for Water Purification Functional Material, Jinan 250022, China
| | - Qian-Qian Song
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
| | - Li-Ping Qiu
- Shandong Province Engineering Technology Research Center for Water Purification Functional Material, Jinan 250022, China
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
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Manessa MDM, Ummam MAF, Efriana AF, Semedi JM, Ayu F. Assessing Derawan Island's Coral Reefs over Two Decades: A Machine Learning Classification Perspective. Sensors (Basel) 2024; 24:466. [PMID: 38257559 PMCID: PMC10818429 DOI: 10.3390/s24020466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/23/2023] [Accepted: 01/09/2024] [Indexed: 01/24/2024]
Abstract
This study aims to understand the dynamic changes in the coral reef habitats of Derawan Island over two decades (2003, 2011, and 2021) using advanced machine learning classification techniques. The motivation stems from the urgent need for accurate, detailed environmental monitoring to inform conservation strategies, particularly in ecologically sensitive areas like coral reefs. We employed non-parametric machine learning algorithms, including Random Forest (RF), Support Vector Machine (SVM), and Classification and Regression Tree (CART), to assess spatial and temporal changes in coral habitats. Our analysis utilized high-resolution data from Landsat 9, Landsat 7, Sentinel-2, and Multispectral Aerial Photos. The RF algorithm proved to be the most accurate, achieving an accuracy of 71.43% with Landsat 9, 73.68% with Sentinel-2, and 78.28% with Multispectral Aerial Photos. Our findings indicate that the classification accuracy is significantly influenced by the geographic resolution and the quality of the field and satellite/aerial image data. Over the two decades, there was a notable decrease in the coral reef area from 2003 to 2011, with a reduction to 16 hectares, followed by a slight increase in area but with more heterogeneous densities between 2011 and 2021. The study underscores the dynamic nature of coral reef habitats and the efficacy of machine learning in environmental monitoring. The insights gained highlight the importance of advanced analytical methods in guiding conservation efforts and understanding ecological changes over time.
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Affiliation(s)
- Masita Dwi Mandini Manessa
- Department of Geography, Faculty of Mathematics and Natural Sciences, University of Indonesia, Depok 16424, Indonesia; (M.A.F.U.); (A.F.E.); (J.M.S.); (F.A.)
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Li FH, Fan HM, Shi H, Xu XQ. [ Spatial and temporal distribution characteristics of extreme wind and its effect on wind erosion in Northeast China]. Ying Yong Sheng Tai Xue Bao 2024; 35:87-94. [PMID: 38511444 DOI: 10.13287/j.1001-9332.202401.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Under the background of climate change, extreme wind events occur frequently in Northeast China, and the soil erosion caused by these extreme wind events has attracted progressively more attention from scholars. We used the methods of linear analysis, Sen+Mann-Kendal trend analysis, and Kriging interpolation to analyze the spatial and temporal characteristics of extreme wind in Northeast China from 2005 to 2020, and used the RWEQ wind erosion estimation model to calculate the annual soil wind erosion of typical wind erosion sites and wind erosion under extreme wind conditions. The results showed that the extreme wind frequency in Northeast China presented a significant upward trend from 2005 to 2020, with an increase of 2.9 times·a-1. The annual average extreme wind frequency in Northeast China ranged from 1 to 49 times·a-1, and the high frequency areas were distributed in the northwest of Xilin Gol, the west of the Hulunbuir Plateau, and the northeast of Changbai Mountain. The average contribution rate of extreme wind to soil wind erosion in four typical sites (Xilinhot, New Barhu Right Banner, Nenjiang, and Tongyu) was 31%.
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Affiliation(s)
- Fang-Hao Li
- College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China
| | - Hao-Ming Fan
- College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China
| | - Hao Shi
- College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China
| | - Xiu-Quan Xu
- College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China
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Lv N, Peng J, He ZQ, Wen Q, Su ZQ, Ali S, Liu CZ, Qiu BL. The Dynamic Distribution of Wolbachia and Rickettsia in AsiaII1 Bemisia tabaci. Insects 2023; 14:401. [PMID: 37103216 PMCID: PMC10144568 DOI: 10.3390/insects14040401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/16/2023] [Accepted: 04/17/2023] [Indexed: 06/19/2023]
Abstract
Wolbachia and Rickettsia are bacterial endosymbionts that can induce a number of reproductive abnormalities in their arthropod hosts. We screened and established the co-infection of Wolbachia and Rickettsia in Bemisia tabaci and compared the spatial and temporal distribution of Wolbachia and Rickettsia in eggs (3-120 h after spawning), nymphs, and adults of B. tabaci by qPCR quantification and fluorescent in situ hybridization (FISH). The results show that the titer of Wolbachia and Rickettsia in the 3-120 h old eggs showed a "w" patterned fluctuation, while the titers of Wolbachia and Rickettsia had a "descending-ascending descending-ascending" change process. The titers of Rickettsia and Wolbachia nymphal and the adult life stages of Asia II1 B. tabaci generally increased with the development of whiteflies. However, the location of Wolbachia and Rickettsia in the egg changed from egg stalk to egg base, and then from egg base to egg posterior, and finally back to the middle of the egg. These results will provide basic information on the quantity and localization of Wolbachia and Rickettsia within different life stages of B. tabaci. These findings help to understand the dynamics of the vertical transmission of symbiotic bacteria.
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Affiliation(s)
- Ning Lv
- Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China
| | - Jing Peng
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China
| | - Zi-Qi He
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China
| | - Qin Wen
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China
| | - Zheng-Qin Su
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China
| | - Shaukat Ali
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China
| | - Chang-Zhong Liu
- Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou 730070, China
| | - Bao-Li Qiu
- Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, South China Agricultural University, Guangzhou 510642, China
- Engineering Research Center of Biocontrol, Ministry of Education, Guangzhou 510642, China
- Chongqing Key Laboratory of Vector Insects, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
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Lv P, Zhang H, Li X. Spatio-Temporal Distribution Characteristics and Drivers of PM 2.5 Pollution in Henan Province, Central China, before and during the COVID-19 Epidemic. Int J Environ Res Public Health 2023; 20:4788. [PMID: 36981695 PMCID: PMC10049534 DOI: 10.3390/ijerph20064788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/02/2023] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
PM2.5 is the main cause of haze pollution, and studying its spatio-temporal distribution and driving factors can provide a scientific basis for prevention and control policies. Therefore, this study uses air quality monitoring information and socioeconomic data before and during the COVID-19 outbreak in 18 prefecture-level cities in Henan Province from 2017 to 2020, using spatial autocorrelation analysis, ArcGIS mapping, and the spatial autocorrelation analysis. ArcGIS mapping and the Durbin model were used to reveal the characteristics of PM2.5 pollution in Henan Province in terms of spatial and temporal distribution characteristics and analyze its causes. The results show that: (1) The annual average PM2.5 concentration in Henan Province fluctuates, but decreases from 2017 to 2020, and is higher in the north and lower in the south. (2) The PM2.5 concentrations in Henan Province in 2017-2020 are positively autocorrelated spatially, with an obvious spatial spillover effect. Areas characterized by a high concentration saw an increase between 2017 and 2019, and a decrease in 2020; values in low-concentration areas remained stable, and the spatial range showed a decreasing trend. (3) The coefficients of socio-economic factors that increased the PM2.5 concentration were construction output value > industrial electricity consumption > energy intensity; those with negative effects were: environmental regulation > green space coverage ratio > population density. Lastly, PM2.5 concentrations were negatively correlated with precipitation and temperature, and positively correlated with humidity. Traffic and production restrictions during the COVID-19 epidemic also improved air quality.
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Wu W, Chen H, Xu S, Liu T, Wang H, Li G, Wang J. Water Environment Characteristics and Water Quality Assessment of Water Source of Diversion System of Project from Hanjiang to Weihe River. Int J Environ Res Public Health 2023; 20:2890. [PMID: 36833585 PMCID: PMC9957252 DOI: 10.3390/ijerph20042890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/19/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
The water source of the water diversion project from the Hanjiang River to the Weihe River is one of the most important drinking water sources in China. Its water quality is related to the water safety of the long-distance water diversion system from the Hanjiang to Weihe Rivers. In order to explore the spatiotemporal change trend of the water environment characteristics of the water source area and analyze the key factors that have a greater impact on it, this study collected 9 types of water environment physical and chemical parameters from 10 water quality monitoring sections from 2017 to 2019; the water environment characteristics of the water source area of the water diversion system from the Hanjiang River to the Weihe River were analyzed and evaluated by using the variance analysis method, the hierarchical cluster analysis method and the water quality identification index evaluation method. The results were as follows. (1) There was spatiotemporal heterogeneity in a number of physical and chemical parameters in the water body of the water source. In terms of time, the concentrations of CODMn, COD, BOD5 and F- were higher in the flood season (July-October) than in the non-flood season (November-June). The concentrations of DO, TP and TN in the non-flood season were higher than those in the flood season. Spatially, the concentration of physical and chemical parameters of the water body in the Huangjinxia Reservoir area was higher than that in the Sanhekou Reservoir area. (2) The water quality of the water source area was good. The comprehensive water quality reached the Class II water quality standard of surface water environmental quality. Time showed that the comprehensive water quality in the non-flood season was better than that in the flood season. Spatially, the overall water quality of the tributaries was better than that of the mainstream. TN is a key indicator that affects water quality. (3) The spatial and temporal differences in water quality in water source areas are mainly affected by factors such as rainfall, temperature and human activities. This study can provide a scientific and data basis for related research on maintaining and improving the quality of the ecological environment of the water source areas of the Hanjiang to Weihe River Water Diversion System.
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Affiliation(s)
- Wei Wu
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
| | - Hang Chen
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
| | - Sheng Xu
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
| | - Ting Liu
- Shaanxi Han Weihe Water Diversion Engineering Construction Co., Ltd., Xi’an 710086, China
| | - Hao Wang
- Shaanxi Han Weihe Water Diversion Engineering Construction Co., Ltd., Xi’an 710086, China
| | - Gaoqing Li
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
| | - Jiawei Wang
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
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Teng J, Ding S, Zhang H, Wang K, Hu X. Bayesian spatiotemporal modelling analysis of hemorrhagic fever with renal syndrome outbreaks in China using R-INLA. Zoonoses Public Health 2023; 70:46-57. [PMID: 36093577 DOI: 10.1111/zph.12999] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 07/09/2022] [Accepted: 08/06/2022] [Indexed: 01/07/2023]
Abstract
Hemorrhagic fever with renal syndrome (HFRS) is a category B infectious disease caused by Hantavirus infection, which can cause acute kidney injury and has a high mortality rate. At present, China is the country most severely afflicted by HFRS in the world, and it is critical to carry out efficient HFRS prevention and management in a scientific and accurate manner. The study used data on the incidence of HFRS in mainland China from 2015 to 2018, built a Bayesian hierarchical spatiotemporal distribution model, and applied the Integrated Nested Laplace Approximation algorithm to analyse the factors influencing the development of HFRS, the spatial and temporal distribution characteristics, and the threshold exceedance locations. The results revealed that the woodland and grassland area (RR = 1.357, 95% CI: 1.005-1.791), economic level (RR = 1.299, 95% CI: 1.007-1.649), and traffic level (RR = 2.442, 95% CI: 1.825-3.199) were all significantly and positively associated with the development of HFRS, with traffic level having the strongest promoting effect. The seasonal cycle was obvious in time, with peaks in May-June and October-December each year, most notably in November. Spatially, there was a south-heavy north-light trend, with a high risk of incidence largely in places rich in mountain and forest vegetation, of which Guizhou, Guangxi, Guangdong, and Jiangxi provinces continuing to have a high incidence in recent years, and the evolution of the epidemic in Hubei and Hunan was becoming more serious. When the early warning threshold was set at 0.2, the detection impact was best, and Guizhou, Guangxi, Guangdong, Jiangxi, Hainan, and Tianjin were positioned near the critical point of the exceedance threshold with the highest risk of incidence. It is recommended that the relevant managers call for active vaccination of outdoor workers, such as those working in agriculture and construction sites, implement rat prevention and extermination before winter arrives, and warn high-risk and medium-high-risk areas to conduct early outbreak surveillance. Move the prevention and control gates forward based on the exceedance threshold for doing preventive and control detection and epidemic research and judgement work.
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Affiliation(s)
- Jiaqi Teng
- Department of Mathematics and System Science, Xinjiang University, Urumqi, Xinjiang, China
| | - Shuzhen Ding
- Department of Mathematics and System Science, Xinjiang University, Urumqi, Xinjiang, China
| | - Huiguo Zhang
- Department of Mathematics and System Science, Xinjiang University, Urumqi, Xinjiang, China
| | - Kai Wang
- Department of Medical Engineering and Technology, Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Xijian Hu
- Department of Mathematics and System Science, Xinjiang University, Urumqi, Xinjiang, China
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12
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Wang Q, Yin Q, Fu S, Cheng J, Xu X, Wang J, Wu B, Tian X, Li Y, Lu J, He Y, Li F, Nie K, Xu S, Lu X, Wang H, Wang B, Liang G. Isolation and Identification of Sandfly-Borne Viruses from Sandflies Collected from June to August, 2019, in Yangquan County, China. Viruses 2022; 14. [PMID: 36560697 DOI: 10.3390/v14122692] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 11/28/2022] [Accepted: 11/29/2022] [Indexed: 12/05/2022] Open
Abstract
In Yangquan County, the sandfly-transmitted virus (Wuxiang virus) was first isolated from sandflies in 2018. However, relationships between the abundance and seasonal fluctuations of local sandflies and sandfly-transmitted viruses are unknown. Herein, we report that sandfly specimens were collected in three villages in Yangquan County, from June to August, 2019. A total of 8363 sandflies were collected (June, 7927; July, 428; August, 8). Eighteen virus strains (June, 18; July, 0; August, 0) were isolated in pools of Phlebotomus chinensis. The genome sequence of the newly isolated virus strain was highly similar to that of the Wuxiang virus (WUXV), isolated from sandflies in Yangquan County in 2018. Our results suggested that the sandfly-transmitted viruses, and the local sandfly population, are stable in Yangquan County, and that June is the peak period for the virus carried by sandflies in this area.
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13
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Gao DD, Yin SS, Gu XK, Lu X, Zhang H, Zhang RQ, Wang LL, Qi YJ. [Vehicle Air Pollutant Emission Inventory and Characterization in Henan Province from 2016 to 2019]. Huan Jing Ke Xue 2021; 42:3663-3675. [PMID: 34309253 DOI: 10.13227/j.hjkx.202011125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Based on the collected urban motor vehicle activity ownership and traffic flow of highways, combined with the mileage and source profiles of VOCs, using the emission factor method, we established high-resolution emission inventories from 2016 to 2019 for urban and 2016-based highway motor vehicles, respectively, in Henan Province, China. The results showed that gasoline vehicles, particularly minibuses and ordinary motorcycles, were the main contributors of CO, VOCs, and NH3, whereas heavy-duty and light-duty diesel trucks emitted SO2, NOx, and PM. Vehicles with China 1, China 3, and China 4 emission standards contributed significantly to pollutant emissions in the fleet. The temporal variation in traffic flow was consistent with the changes in freight and passenger traffic, with higher coefficients of variation for highways from August to October and the lowest in November. The weekly and daily changes in urban trunk roads showed distinct weekend effects and clear double-peak features, respectively. High-value emission areas were concentrated in urban centers with dense transport networks and high traffic volumes and on roads radiating outward from urban areas. The Lianhuo Expressway and the Beijing-Hong Kong-Macau Expressway were high-emission roads. Light-duty gasoline vehicles made the largest contribution to the ozone formation potential (OFP) of VOCs from motor vehicles. Five species, such as ethylene and propylene, contributed significantly to VOC emissions and OFP. The average annual growth rate of vehicle ownership from 2016 to 2019 was 5.7%. Compared with 2016, VOC emissions increased by 2.8% in 2019, whereas emissions of other pollutants showed decreasing trends of different degrees, with decreases of 76.3%, 51.7%, 50.3%, 43.1%, 16.7%, and 5.9% for SO2, PM2.5, PM10, NH3, CO, and NOx, respectively. The emission reduction percentage of each pollutant in 2019 under the control policies relative to the baseline scenario ranged from 15.6% to 82.4%.
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Affiliation(s)
- Dan-Dan Gao
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Sha-Sha Yin
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Xing-Ke Gu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Xuan Lu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Huan Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Rui-Qin Zhang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
| | - Ling-Ling Wang
- Ecological Environment Monitoring Center of Henan Province, Zhengzhou 450004, China
| | - Yan-Jie Qi
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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14
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Naureen Z, Dautaj A, Anpilogov K, Camilleri G, Dhuli K, Tanzi B, Maltese PE, Cristofoli F, De Antoni L, Beccari T, Dundar M, Bertelli M. Bacteriophages presence in nature and their role in the natural selection of bacterial populations. Acta Biomed 2020; 91:e2020024. [PMID: 33170167 PMCID: PMC8023132 DOI: 10.23750/abm.v91i13-s.10819] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 10/23/2020] [Indexed: 01/21/2023]
Abstract
Phages are the obligate parasite of bacteria and have complex interactions with their hosts. Phages can live in, modify, and shape bacterial communities by bringing about changes in their abundance, diversity, physiology, and virulence. In addition, phages mediate lateral gene transfer, modify host metabolism and reallocate bacterially-derived biochemical compounds through cell lysis, thus playing an important role in ecosystem. Phages coexist and coevolve with bacteria and have developed several antidefense mechanisms in response to bacterial defense strategies against them. Phages owe their existence to their bacterial hosts, therefore they bring about alterations in their host genomes by transferring resistance genes and genes encoding toxins in order to improve the fitness of the hosts. Application of phages in biotechnology, environment, agriculture and medicines demands a deep insight into the myriad of phage-bacteria interactions. However, to understand their complex interactions, we need to know how unique phages are to their bacterial hosts and how they exert a selective pressure on the microbial communities in nature. Consequently, the present review focuses on phage biology with respect to natural selection of bacterial populations.
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Affiliation(s)
- Zakira Naureen
- Department of Biological Sciences and Chemistry, College of Arts and Sciences, University of Nizwa, Nizwa, Oman.
| | | | | | | | | | | | | | | | | | - Tommaso Beccari
- Department of Pharmaceutical Science, University of Perugia, Perugia, Italy.
| | - Munis Dundar
- Department of Medical Genetics, Faculty of Medicine, Erciyes University, Kayseri, Turkey.
| | - Matteo Bertelli
- EBTNA-LAB, Rovereto (TN), Italy; MAGI EUREGIO, Bolzano, Italy; MAGI'S LAB, Rovereto (TN), Italy.
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15
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Zhang YL, Cui XM. [Spatial and Temporal Characteristics of AOD and Angström Exponent in the Yangtze River Delta Based on MODIS_C061]. Huan Jing Ke Xue 2020; 41:2617-2624. [PMID: 32608776 DOI: 10.13227/j.hjkx.201909273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Considering the Yangtze River Delta as the research region, the applicability of the Terra-MODIS C061 deep blue algorithm (DB) AOD products was evaluated using Aerosol Robotic Network (AERONET) ground-based observations. The results demonstrated that the correlation between Terra-MODIS C061 deep blue algorithm (DB) aerosol optical depth (AOD) and AERONET AOD was high (0.95). Characteristics of spatial distribution and temporal variation of AOD and Angström exponent (AE) from 2000 to 2018 in the study area were analyzed using MOD04_L2 products from 2000 to 2018. The results showed that the AOD in the Yangtze River Delta was distributed as "eastern and northern plains high and southern and western mountains low". The AE showed a "northern low and south high" pattern. In terms of temporal distribution, from 2003 to 2007, the annual average AOD increased significantly, with a growth rate of 23%. After 2011, the AOD showed a downward trend. From 2001 to 2003, the annual average of AE rapidly increased, while after 2012, the AE decreased gradually. The AOD showed obvious seasonal changes in the Yangtze River Delta region, with high values in summer and low values in winter. The highest AOD was observed in June (0.84) in all monthly averages, while the lowest was observed in August (0.40). The seasonal average AE was high in autumn and low in spring. The highest AE of 1.47 was observed in September in all monthly averages, and the lowest of 1.08 was observed in March. Aerosol types in the Yangtze River Delta region were investigated according to the relationship between AOD and AE. The results suggested that the urban industrial aerosol was the main aerosol type in the region, followed by mixed type and clean continental aerosols.
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Affiliation(s)
- Ying-Lei Zhang
- College of Geoscience and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China
| | - Xi-Min Cui
- College of Geoscience and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China
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16
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Wu C, Dong F, Chen X, Zhang T, Mei X, Ning J, She D. Spatial and temporal distribution, degradation, and metabolism of three neonicotinoid insecticides on different parts, especially pests' target feeding parts of apple tree. Pest Manag Sci 2020; 76:2190-2197. [PMID: 31965754 DOI: 10.1002/ps.5756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/13/2020] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Neonicotinoid insecticides (NIs) have been recently banned in some countries because of increased pest resistance and deleterious risks to non-target organisms. Recent studies considered all parts of crops as a whole part in plant protection. However, there are few reports focused on the distribution and metabolic trends of NIs on target feeding sites of different pests in apple orchards. RESULTS The spatial and temporal distribution, absorption, degradation, and metabolism of three NIs, imidacloprid, acetamiprid, and thiamethoxam, on different parts of apple trees were studied under foliar spray and root irrigation treatments. In the spray treatment, the initial average concentration ratios (TCRs) were 31.6% for lower shoots, 23.3% for upper leaves, 23.2% for upper shoots, 21.0% for lower leaves, and 0.5% and 0.4% for upper and lower fruits, respectively. The average half-lives of the three NIs were 2.9 days for shoots, 7.4 days for leaves, and 10.8 days for fruits. The degradation rate of shoots was 2.5 times that of leaves, and 3.6 times that of fruits. Imidacloprid olefin and N-methyl acetamiprid were two of the main metabolites. In the root treatment, both roots and soils had high TCRs during the whole sampling period. Only imidacloprid was transmitted to above-ground parts of the plants, with TCRs of 0.38-50.94%. CONCLUSION This study found significant differences in spatial and temporal distribution, degradation, metabolism, and trends of NIs on different pest target sites of apple trees. The data obtained may help promote scientific control of target pests and evaluation of safety for non-target species in orchards. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Changcai Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Fengshou Dong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiuye Chen
- Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, China
| | - Tao Zhang
- Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, China
| | - Xiangdong Mei
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jun Ning
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dongmei She
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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17
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Zhang HT, Tian YZ, Liu BS, Yang JM, Yu J, Gong P, Wu JH, Zhang YF. [Spatial Temporal Characteristics and Cluster Analysis of Chemical Components for Ambient PM 2.5 in Wuhan]. Huan Jing Ke Xue 2019; 40:4764-4773. [PMID: 31854541 DOI: 10.13227/j.hjkx.201904069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The characteristics of chemical components of particulate matter are good indicators for analyzing sources and causes of pollution. The spatial and temporal distribution characteristics of particulate matter can reflect regional pollution problems in urban development, providing a basic dataset to support effective control of particulate matter sources. We collected PM2.5 and analyzed its concentration and chemical components at eight sites during different seasons. The results indicated that the average concentration of PM2.5 in Wuhan reached 70.7 μg·m-3. The concentration of PM2.5 in winter (103.1 μg·m-3) was significantly higher than that of other seasons, and the lowest concentration was in autumn (52.4 μg·m-3). The concentrations of PM2.5 in Donghu Gaoxin, Zhuankou New Area, and Qingshan Ganghua Station were significantly higher than those at the other sites. The main chemical components in PM2.5 were OC and SO42-, accounting for 15.4% and 14.2%, respectively. The OC concentration was the highest in winter, whereas SO42-concentration was the highest in summer. The average annual OC/EC ratio was up to 2.80, lower in winter and spring, and higher in summer and autumn. Material reconstruction showed that secondary particles and organic matter (OM) were major substances, accounting for 32.34% and 20.44% of PM2.5 mass, respectively. Coal combustion and vehicle exhaust might be the main contributors to ambient PM2.5. The highest fractions for OM were at the Wujiashan and Donghu Gaoxin sites, whereas the fraction of secondary particles was higher at each site, suggesting that secondary pollution had obvious regional characteristics in Wuhan. Cluster analysis based on the characteristics of chemical components showed that the eight sites were divided into three clusters:1 Hanyang Yuehu, Haze, Donghu Liyuan, and Huangpi sites, where the main characteristics were that the concentrations of components at each point were low; ② Zhuankou New Area and Qingshan Ganghua, which were characterized by higher nitrogen components; and ③ Donghu Gaoxin and Wujiashan, where not only industrial sources were heavily polluted in Wuhan, but also motor vehicles and dust pollution greatly contributed.
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Affiliation(s)
- Hui-Tao Zhang
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ying-Ze Tian
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Bao-Shuang Liu
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Jia-Mei Yang
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Jia Yu
- Wuhan Environmental Monitoring Center Station, Wuhan 430015, China
| | - Pan Gong
- Wuhan Environmental Monitoring Center Station, Wuhan 430015, China
| | - Jian-Hui Wu
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Yu-Fen Zhang
- State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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18
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Yang WY, Sun LY, Song FB, Yang XQ, Zhang MJ, Li SX, Zhu XC. [Research advances in species diversity of arbuscular mycorrhizal fungi in terrestrial agro-ecosystem]. Ying Yong Sheng Tai Xue Bao 2019; 30:3971-3979. [PMID: 31833711 DOI: 10.13287/j.1001-9332.201911.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Arbuscular mycorrhizal fungi (AMF) are ancient and ubiquitous soil microorganisms, which can form mutually beneficial association with most terrestrial plants. Within the symbiotic relationship, AMF helps their host plants to absorb nutrients such as nitrogen and phosphorus while obtains carbon from the hosts. AMF plays an important role in agricultural ecosystem, including promoting plant growth, improving crop quality, increasing plant stress resistance, stabilizing soil structure, keeping ecological balance, and maintaining a sustainable agricultural development. We summarized the research advances of AMF in terrestrial agro-ecosystem in recent years, by focusing on AMF species diversity, spatial and temporal distribution, and influence factors of AMF biodiversity in terrestrial agro-ecosystem of China. Further research works were also prospected.
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Affiliation(s)
- Wen-Ying Yang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lu-Ying Sun
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng-Bin Song
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Xiao-Qin Yang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng-Jie Zhang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shu-Xin Li
- Technology Engineering Center of Functional Grass Industry, Northeast Forestry University, Harbin 150040, China
| | - Xian-Can Zhu
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
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Hu J, Kang YM, Chen YH, Liu X, Li X, Liu Q. [Analysis of Aerosol Optical Depth Variation Characteristics for 10 years in Urumqi Based on MODIS_C006]. Huan Jing Ke Xue 2018; 39:3563-3570. [PMID: 29998662 DOI: 10.13227/j.hjkx.201710125] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Based on the MYD04_L2_C006 dataset gained from Moderate resolution imaging spectroradiometer MODIS Level 2 at 10 km resolution of NASA's EOS (Earth Observing System) from 2006 to 2015, the aerosol optical depths (AODs) for 10 years under the condition of mild above atmospheric pollution (including mild) were analyzed for Urumqi City. The results showed that the average AODs in Urumqi were unimodally distribution over the 10 years. From January to April, the AODs gradually increased. During a year, the annual peak of 0.37±0.19 was in April, and the lowest value of 0.22±0.20 was in October. Owing to the frequent occurrence of dust weather conditions in spring, the largest seasonal variation of AOD was in spring, as the air pollution in the entire area was very serious, followed by summer and winter, with the smallest in autumn. In addition, the urban area was the high AOD value area in Urumqi, as its air pollution was more severe than that in the suburbs. The average value of AOD during the 10 years was 0.293. The highest value of AOD was 0.33 in 2006, and the lowest value of 0.24 was in 2008, which declined to 23.3% of that in 2007. The annual change in AOD in Urumqi over the 10 years rose steadily. Compared with previous studies, the lowest and highest values were both higher to different degrees. Despite the deduction trend in 2015, air pollution in Urumqi was serious in the studied decade, and thus control of such needs to be strengthened.
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Affiliation(s)
- Jun Hu
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Yan-Ming Kang
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Yong-Hang Chen
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.,Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
| | - Xin Liu
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Xia Li
- Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
| | - Qiong Liu
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
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20
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Zhao XS, Yu JJ, Fu L, Jiang W, Zhou C, Li B, Douglas H, Christopher W, Zhang L. [Source and Distribution of Dissolved Metal Ions in the Backwater Area of Pengxi River in Three Gorges Reservoir]. Huan Jing Ke Xue 2018; 39:2117-2125. [PMID: 29965511 DOI: 10.13227/j.hjkx.201704050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study uses the Gaoyang Lake section of the Pengxi River, the largest tributary on the northern bank of the Three Gorges Reservoir (TGR), as an example for exploring the distributions and dynamics of Ca, Zn, Fe, Cr, Pb, Cu, and Hg ions in the tributaries of TGR where the water level fluctuates due to dam regulation. Samples were taken 21 times, once every 17.3 days, at four sampling sites in Gaoyang Lake, which is in a perennial backwater zone of the Pengxi River, during one year from June 5, 2013 to May 29, 2014. At each sampling site, water samples were taken from the surface layer (0-0.5 m), middle layer, and bottom layer (0.5 m above the bed mud). During winter when the water was not stratified, the middle layer samples were taken at 1/2 depth, and when water was stratified in other seasons, the middle layer samples were taken from the thermal layer. Inductively coupled plasma atomic emission spectrometry (ICP-AES) and cold-vapor atomic absorption methods were adopted to determine the concentrations of the metals. Excel and SPSS were used for data analysis and Matlab for building 3-D prisms displaying concentration distributions of Hg ions in the high water level period (175 m, November-April in the ensuing year), sluicing period (May-middle June), low water level in the flooding season (145 m, June-August), and the storage period (September-November). The results provided the following observations ① Concentrations of Cr, Pb, Cu, Zn, and Hg ions were lower than those in Class Ⅲ of the water environment quality standard (GB 3838-2002). ② Cr, Pb, and Cu had high peak values during the storage and sluicing period, and the lowest values during the high water level period. Cr, Pb, and Cu were derived from the main stream of Yangtze, while Fe and Zn were from the Pengxi River locally. The concentration of Hg ions was affected by both the main stream and endogenous sources. As the water column stratified, metal ions did not mix among the stratified layers in Gaoyang Lake. ③ The conductivity was significantly lower during the high water level period than during other water level periods. The main material that affects the conductivity of Gaoyang Lake could be nonmetallic ions.
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Affiliation(s)
- Xiao-Song Zhao
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,College of Resource and Environment, Southwest University, Chongqing 400716, China
| | - Jian-Jun Yu
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,College of Resource and Environment, Southwest University, Chongqing 400716, China
| | - Li Fu
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,College of Resource and Environment, Southwest University, Chongqing 400716, China
| | - Wei Jiang
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,College of Resource and Environment, Southwest University, Chongqing 400716, China
| | - Chuan Zhou
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,College of Resource and Environment, Southwest University, Chongqing 400716, China
| | - Bo Li
- Beibei District Environmental Protection Bureau, Chongqing 400711, China
| | - Haffner Douglas
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,Great Lakes Institute for Environmental Research, University of Windsor, Windsor, N9B 3P4, Canada
| | - Weisener Christopher
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, N9B 3P4, Canada
| | - Lei Zhang
- International Base for S & T Collaboration on Water Environmental Monitoring and Simulation in TGR Region(WEMST), Chongqing 400716, China.,College of Resource and Environment, Southwest University, Chongqing 400716, China.,Great Lakes Institute for Environmental Research, University of Windsor, Windsor, N9B 3P4, Canada
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Luo YF, Li L, Li QH, Jiao SL, Li HM, Chen FF. [ Spatial and Temporal Distribution of Chlorophyll a and Its Relationship to Algae and Environmental Factors in Aha Reservoir]. Huan Jing Ke Xue 2017; 38:4151-4159. [PMID: 29965198 DOI: 10.13227/j.hjkx.201703177] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
As one of the drinking water sources for Guiyang City in southwest China, the Aha Reservoir has an area of 190 km2 and a volume of 5.42×108 m3. The water depth is less than 30 m, with an average depth of 13 m. Regulated by subtropical humid monsoon climate, it has cool summers and warm winters, with an annual mean air temperature of about 15.3℃ and an annual normal rainfall of approximately 1,129 mm. Impacted heavily by human activity (e.g., untreated industrial and domestic sewage and agricultural non-point pollution sources), the eutrophication problem in the Aha Reservoir has become more serious each year. In order to explore the spatial and temporal distribution characteristics of chlorophyll a (Chl-a) and its relationship to algae and the driving factors in the Aha Reservoir, phytoplankton and water samples were collected in the dry period, normal period, and flood period. The results showed a significant seasonal variation in Chl-a, same as biomass, but not the same as the algal abundance. Highest Chl-a concentration (91 μg·L-1) occurred in the mean season with the dinoflagellate bloom but during dry and wet seasons, they were only 8 μg·L-1 and 16 μg·L-1, respectively. During the dry and flood periods, the Chl-a concentrations in surface waters were slightly higher than the other layers caused by sufficient light and dissolved oxygen. But in the normal period, the Chl-a concentrations in surface waters were far higher than the other layers because of the dinoflagellate bloom assembling in surface waters. Located at the reservoir entrance of Jinzhong River, Dam sampling point owned higher Chl-a concentration than Kuzhong as a result of higher nutrients. Correlation analysis indicated that Dinoflagellate was positively correlated with Chl-a (R=0.798, P<0.01). Chl-a was positively associated with total phosphorus, dissolved oxygen, pH value, and total nitrogen (R=0.762, P<0.01; R=0.792, P<0.01; R=0.658, P<0.01; R=0.388, P<0.05) and it had a negative correlation with the N/P ratio and nitrate nitrogen (R=-0.37, P<0.05; R=-0.435, P<0.05). Stepwise regression analysis showed that TP, N/P ratio, and DO were the most important factors influencing the temporal and spatial distribution of Chl-a. Thermal stratification and water temperature were also the significant factors that could not be ignored.
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Affiliation(s)
- Yi-Fu Luo
- School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China
| | - Lei Li
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Qiu-Hua Li
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Shu-Lin Jiao
- School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China
| | - Hong-Mei Li
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
| | - Feng-Feng Chen
- School of Public Health, Guizhou Medical University, Guiyang 550025, China
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Zhao DZ, Tan DB, Li C, Shen SH. [Tempo-spatial Variations and Influential Factors of Carbon Dioxide Emissions from the Geheyan Reservoir over the Qingjiang River Basin, China]. Huan Jing Ke Xue 2017; 38:954-963. [PMID: 29965565 DOI: 10.13227/j.hjkx.201607086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Greenhouse gas emission from aquatic ecosystem will affect climate change on the regional and global scale. So large river interception project which affects the carbon cycle model and greenhouse gas emission from aquatic ecosystem has provoked more and more attentions in recent years. In order to understand and evaluate the effects of typical hydropower project construction on the aquatic ecosystem and carbon cycle, the Geheyan Reservoir, a typical river interception project, was selected as a typical case in this paper for measuring carbon dioxide fluxes from interface between water and atmosphere from March, 2015 to February, 2016. The integration of the online gas analyzer and floating box was used to obtain carbon dioxide fluxes from interface between water and atmosphere. Data was obtained over the before dam, upstream, tributary, drawdown area and bay area respectively for understanding the spatial Heterogeneity of carbon dioxide fluxes. Data analysis showed that yearly mean fluxes of carbon dioxide from the Geheyan Reservoir was (55.6918±66.3329) mg·(m2·h)-1 during measurement, which indicated that the temporal distribution was higher in winter and lower in other seasons and the spatial variation was higher in typical bay and lower before dam as well as drawdown zone over the reservoir. Moreover, the seasonal variation of carbon dioxide fluxes from the interface between water and atmosphere was very stable at Yuxiakou measurement points as a typical background area of the reservoir, which was unexpectedly higher than those before dam and drawdown zone in the most months during measurement. The results from data analysis also indicated that the spatial and temporal variation of carbon dioxide fluxes from the Geheyan Reservoir was affected by water quality parameters such as dissolved oxygen, chlorophyll, pH, water temperature and conductivity and carbon in water, but the relationship between carbon dioxide fluxes and other parameter was very different within each season and impound period. So the results above will provide more supports for understanding the import pathway and transfer of aquatic carbon cycle caused by large river interception project in China.
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Affiliation(s)
- Deng-Zhong Zhao
- Changjiang River Scientific Research Institute(CRSRI), Changjiang Water Resources Commission, Wuhan 430010, China
| | - De-Bao Tan
- Changjiang River Scientific Research Institute(CRSRI), Changjiang Water Resources Commission, Wuhan 430010, China
| | - Chong Li
- China Three Gorges Corporation, Beijing 100038, China
| | - Shao-Hong Shen
- Changjiang River Scientific Research Institute(CRSRI), Changjiang Water Resources Commission, Wuhan 430010, China
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Tang SR, Guo RL, Wei JY, Meng JT, Wei SJ, Yang WH, Zhou ZG. [Trends and temporal-spatial distribution of fiber quality in the national cotton variety regional trials.]. Ying Yong Sheng Tai Xue Bao 2017; 28:589-602. [PMID: 29749168 DOI: 10.13287/j.1001-9332.201702.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
This study applied a grey predicting model to predict the trend of cotton fiber quality for next 5 and 10 years in the Yellow River Valley (YeRV), the Yangtze River Valley (YaRV) and the Northwest Inland Region (NWIR) based on the data set from the fiber quality traits of candidate cultivars in National Cotton Variety Regional Trials during 2005-2014. The temporal and spatial distributions of cotton trails in the three major cotton producing regions were analyzed. The results showed that the overall fiber quality of the Regional Cotton Variety Trials was improved during 2005-2014. Fiber length showed excellence and the distribution of threshold increased to 27.0-32.0 mm, and the fiber length of most cultivars reached 29 or 30 mm. Fiber strength also showed an increase trend. The proportion of high level (31.0 cN·tex-1) cultivars in YaRV was as high as 61.1% in 2011. Micronaire was significantly different among the three major cotton producing regions. In YeRV, micronaire was increased from class B2(4.3-4.9) to class C2(≥5.0). In YaRV, it maintained in a high level of class C2; while it performed excellent in class A (3.7-4.2) and B2 (4.3-4.9) in NWIR. As a comprehensive fiber quality trait, spinning consistency index decreased from NWIR, YaRV to YeRV, and was ranged from 130 to 149, which was suitable for 40-50 spun yarn and accounted for about 80.0% over the total. We concluded that NWIR had the best fiber quality, followed by YaRV and YeRV in recent ten years. In the near future, fiber quality in the regional cotton variety trails would slightly increase in YaRV, but significantly decrease in YeRV and NWIR. These changes should be highly concerned for breeders, the committee of National Cotton Variety Regional Trials and approval of management department in China.
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Affiliation(s)
- Shu Rong Tang
- Nanjing Agricultural University/Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing 210095, China.,Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, Henan, China
| | - Rui Lin Guo
- Anyang Institute of Technology, Anyang 455000, Henan, China
| | - Jing Yan Wei
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, Henan, China
| | - Jun Ting Meng
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, Henan, China
| | - Shou Jun Wei
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, Henan, China
| | - Wei Hua Yang
- Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, Henan, China
| | - Zhi Guo Zhou
- Nanjing Agricultural University/Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing 210095, China
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Huang P, Zhang J, Tang Y, Liu L. Spatial and Temporal Distribution of PM2.5 Pollution in Xi'an City, China. Int J Environ Res Public Health 2015; 12:6608-25. [PMID: 26068090 DOI: 10.3390/ijerph120606608] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 06/05/2015] [Indexed: 11/25/2022]
Abstract
The monitoring data of the 13 stations in Xi’an city for the whole years of 2013 and 2014 was counted and analyzed. Obtaining the spatial and temporal distribution characteristics of PM2.5 was the goal. Cluster analysis and the wavelet transform were utilized to discuss the regional distribution characteristics of PM2.5 concentration (ρ(PM2.5)) and the main features of its yearly changes and sudden changes. Additionally, some relevant factors were taken into account to interpret the changes. The results show that ρ(PM2.5) in Xi’an during 2013 was generally higher than in 2014, it is high in winter and low in summer, and the high PM2.5 concentration centers are around the People’s Stadium and Caotan monitoring sites; For the regional PM2.5 distribution, the 13 sites can be divided into three categories, in which Textile city is Cluster 1, and High-tech Western is Cluster 2, and Cluster 3 includes the remaining 11 monitoring sites; the coefficient of goodness of the cluster analysis is 0.6761, which indicates that the result is acceptable. As for the yearly change, apart from June and July, the average ρ(PM2.5) concentration has been above the normal concentration criteria of Chinese National Standard (50 g/m3); cloudy weather and low winds are the major meteorological factors leading to the sudden changes of ρ(PM2.5).
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Aćimović SG, VanWoerkom AH, Reeb PD, Vandervoort C, Garavaglia T, Cregg BM, Wise JC. Spatial and temporal distribution of trunk-injected imidacloprid in apple tree canopies. Pest Manag Sci 2014; 70:1751-60. [PMID: 24481641 DOI: 10.1002/ps.3747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 12/30/2013] [Accepted: 01/23/2014] [Indexed: 05/09/2023]
Abstract
BACKGROUND Pesticide use in orchards creates drift-driven pesticide losses which contaminate the environment. Trunk injection of pesticides as a target-precise delivery system could greatly reduce pesticide losses. However, pesticide efficiency after trunk injection is associated with the underinvestigated spatial and temporal distribution of the pesticide within the tree crown. This study quantified the spatial and temporal distribution of trunk-injected imidacloprid within apple crowns after trunk injection using one, two, four or eight injection ports per tree. RESULTS The spatial uniformity of imidacloprid distribution in apple crowns significantly increased with more injection ports. Four ports allowed uniform spatial distribution of imidacloprid in the crown. Uniform and non-uniform spatial distributions were established early and lasted throughout the experiment. The temporal distribution of imidacloprid was significantly non-uniform. Upper and lower crown positions did not significantly differ in compound concentration. Crown concentration patterns indicated that imidacloprid transport in the trunk occurred through radial diffusion and vertical uptake with a spiral pattern. CONCLUSION By showing where and when a trunk-injected compound is distributed in the apple tree canopy, this study addresses a key knowledge gap in terms of explaining the efficiency of the compound in the crown. These findings allow the improvement of target-precise pesticide delivery for more sustainable tree-based agriculture.
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Affiliation(s)
- Srđan G Aćimović
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
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Abstract
The aim of the study was to describe the spatial and temporal patterns of dengue in Guangdong for 1978 to 2010. Time series analysis was performed using data on annual dengue incidence in Guangdong province for 1978-2010. Annual average dengue incidences for each city were mapped for 4 periods by using the geographical information system (GIS). Hot spot analysis was used to identify spatial patterns of dengue cases for 2005-2010 by using the CrimeStat III software. The incidence of dengue in Guangdong province had fallen steadily from 1978 to 2010. The time series was a random sequence without regularity and with no fixed cycle. The geographic range of dengue fever had expanded from 1978 to 2010. Cases were mostly concentrated in Zhanjiang and the developed regions of Pearl River Delta and Shantou.
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Affiliation(s)
- Chenggang Wang
- Shandong University, Jinan, Shandong, PR China State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, PR China Shandong University of Traditional Chinese Medicine, Jinan, Shandong, PR China
| | - Weizhong Yang
- China CDC Key Laboratory of Surveillance and Early-Warning on Infectious Disease, Beijing, PR China
| | - Jingchun Fan
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, PR China China CDC Key Laboratory of Surveillance and Early-Warning on Infectious Disease, Beijing, PR China Shandong University Climate Change and Health Center, Jinan, Shandong, PR China
| | - Furong Wang
- Shandong University of Traditional Chinese Medicine, Jinan, Shandong, PR China
| | - Baofa Jiang
- Shandong University, Jinan, Shandong, PR China Shandong University Climate Change and Health Center, Jinan, Shandong, PR China
| | - Qiyong Liu
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, China CDC, Beijing, PR China China CDC Key Laboratory of Surveillance and Early-Warning on Infectious Disease, Beijing, PR China Shandong University Climate Change and Health Center, Jinan, Shandong, PR China
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Wang J, Tong X. Species diversity, seasonal dynamics, and vertical distribution of litter-dwelling thrips in an urban forest remnant of South China. J Insect Sci 2012; 12:67. [PMID: 22937731 PMCID: PMC3481465 DOI: 10.1673/031.012.6701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 12/23/2011] [Indexed: 06/01/2023]
Abstract
Litter-dwelling thrips are an important component of soil macroinvertebrates in tropical and subtropical regions. However, little is known about assemblage composition, seasonal abundance and vertical distribution of litter-dwelling thrips. A survey of forest litter-dwelling thrips and other soil macroinvertebrates was conducted in an urban forest remnant at Guangzhou, China during 2004-2005 and 2008-2009. A total of 835 Tullgren samples were collected during the study. Thysanoptera constituted 6.5% of total litter-dwelling macroinvertebrate individuals extracted, representing three families, 19 genera, and 25 species. Psalidothrips ascitus Ananthakrishnan (Thysanoptera: Phlaeothripidae) and Hyidiothrips guangdongensis Wang, Tong and Zhang represented 78.5% of all individuals of litter-dwelling thrips during the survey. Numbers of species and density of leaf-litter thrips fluctuated between different months. Density of litter thrips increased from March until October, reaching a maximum of 41.1 individuals/m2 followed by a decrease. In January and February only a few larval thrips were present. Species diversity gradually increased from July (four species) to December (10 species), and then declined rapidly. The vertical distribution showed that the leaf-litter thrips species richness and abundance decreased significantly with soil depth; they were found only in the litter layer and upper soil layer (0-5 cm in depth) and were entirely absent in deeper soil layers. The results suggest that litter-dwelling thrips are a common group of litter invertebrates with high species diversity in subtropical regions. These urban forest remnants should be given special consideration in forest conservation planning, because of their significance as refugia for the litter invertebrate assemblages, especially for leaf-litter thrips.
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Affiliation(s)
- Jun Wang
- College of Natural Resources and Environment, South China Agricultural
University, Guangzhou 510642, China
- College of Plant Science, Jilin University, Changchun
130062, China
| | - Xiaoli Tong
- College of Natural Resources and Environment, South China Agricultural
University, Guangzhou 510642, China
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