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Dynamic analysis of urban spatial expansion and its determinants in xiamen Island

Journal of Geographical Sciences 2011年第3期21卷 503-520页

作者： LI Xinhu LIN Tao ZHANG Guoqin XlAO Lishan ZHAO Qianjun CUI Shenghui key lab of urban Environment and Health Institute of Urban Environment CAS Xiamen Key Lab of Urban Metabolism Xiamen 361021 Fujian China Institute of Remote Sensing Applications CAS Beijing 100101 China

Most of the world＇s cities are concentrated in coastal areas. As a special geographical component of the coastal system, island urban spatial expansion is the outcome of interactions between city development and the physical environment. This paper takes xiamen Island, located in Southeastern China, as an example to analyze island urban spatial expansion and its determinants by combining an analysis of the literature on urban development policies, urban overall plans, population growth and industrial development, with geographical information analysis using historical maps and remote sensing photographs. Firstly, we reviewed the history of the xiamen City development during the last 100 years, which can be divided into four periods： the embryonic modern city and early development from 1908 to 1949; administrative boundary expansion and infrastructure development from 1950 to 1979; special economic zone construction and rapid urbanization from 1980 to 2003; and Bay City construction since 2003. The dynamic changes to the coastline, island shape, built-up area, transportation, administrative division, and major land use type conversion which occurred during approximately the past 100 years were analyzed and the characteristics of the island urban spatial expansion were concluded： early expansion from a central point, followed by expansion along a section of coastline, and expansion from the coastline inland. Secondly, we discussed the potential determinants of island urban spatial expansion including administrative division adjustment, urban master planning revision, industrial development, topographical factors, coastal area reclamation, transportation expansion, and population growth. Finally, the effects of each potential determinant on island urban spatial expansion were concluded. Island urban spatial expansion is the result of a synthesis of natural and socio-economic factors which are not independent but interacting. Built-up area expansion is the major driver of island land cover and land use changes. By th

关键词： island urbanization spatial expansion determinants xiamen

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Material dependence of cities and implications for regional sustainability

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Regional Sustainability 2020年第1期1卷 31-36页

作者： Yupeng Liu Jiajia Li Linlin Duan Min Dai Wei-qiang Chen key lab of urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen361021China Xiamen Key Lab of Urban Metabolism Xiamen361021China University of Chinese Academy of Sciences Beijing100049China Fudan Tyndall Center Department of Environmental Science&EngineeringFudan UniversityShanghai200438China

Cities rely on massive amounts of physical,chemical,and biological resources to support their growth and metabolism.These‘metabolic inputs’are accumulated in cities to form material stocks in buildings,infrastructures,transportation facilities,and household appliances.This study takes China’s urbanization as an example to illustrate the characteristics of material stock changes in developing countries and compare them with those in developed countries.Results show that(1)material stocks have been growing in China,but have saturated in developed countries,and(2)the major components of urban metabolism are construction and industrial materials(e.g.,steel)in developing countries but biomass(e.g.,food)in developed countries.The changes in the magnitude and types of material stocks can not only measure urban development but also directly link city and its residents,offering advantages in representing urbanization over the existing indices such as population,land use,or gross domestic product(GDP).Given the new insights provided by material stock,we recommend to embrace it as a critical index of urbanization for guiding urban planning and policy-making.

关键词： urbanization urban metabolism Material stock Land use/cover changes Economic transition Sustainability Industrial ecology

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Gut microbiota and transcriptome response of earthworms(Metaphire guillelmi)to polymyxin B exposure

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环境科学学报:英文版 2023年第11期133卷 37-47页

作者： Jun Zhao Guilan Duan Yongguan Zhu Dong Zhu State key lab of urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China key laboratory of urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Polymyxin B(PMB)has received widespread attention for its use as a last-line therapy against multidrug-resistant bacterial infection.However,the consequences of unintended PMB exposure on organisms in the surrounding environment remain inconclusive.Therefore,this study investigated the effects of soil PMB residue on the gut microbiota and transcriptome of earthworms(Metaphire guillelmi).The results indicated that the tested doses of PMB(0.01–100 mg/kg soil)did not significantly affect the richness and Shannon’s diversity index of the earthworm gut microbiota,but PMB altered its community structure and taxonomic composition.Moreover,PMB significantly affected Lysobacter,Aeromonas,and Sphingomonas in the soil microbiota,whereas Pseudomonas was significantly impacted the earthworm gut microbiota.Furthermore,active bacteria responded more significantly to PMB than the total microbial community.Bacterial genera such as Acinetobacter and Bacillus were highly correlated with differential expression of some genes,including up-regulated genes associated with folate biosynthesis,sulphur metabolism,and the IL-17 signalling pathway,and downregulated genes involved in vitamin digestion and absorption,salivary secretion,other types of O-glycan biosynthesis,and the NOD-like receptor signalling pathway.These results suggest that adaptation to PMB stress by earthworms involves changes in energy metabolism,their immune and digestive systems,as well as glycan biosynthesis.The study findings help elucidate the relationship between earthworms and their microbiota,while providing a reference for understanding the environmental risks of PMB.

关键词： Microbiome Antibiotic Soil fauna Active microbiota Transcriptome

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Evolution of the global polyethylene waste trade system

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Ecosystem Health and Sustainability 2020年第1期6卷 265-280,264页

作者： Wen Xu Wei-Qiang Chen Daqian Jiang Chao Zhang Zijie Ma Yan Ren Lei Shi key lab of urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamenFujianChina Xiamen Key Lab of Urban Metabolism XiamenFujianChina Middlebury College MiddleburyVTUSA University of Chinese Academy of Sciences BeijingChina eEnvironmental Engineering Department Montana TechButteMTUSA School of Economics and Management Tongji UniversityShanghaiChina State key Joint laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijingChina

Introduction:China’s import bans on solid wastes starting from 2017 have challenged the global trade system of plastic wastes,which remains poorly characterized.This study chooses polyethylene(PE)as a case and aims to map out the global trade networks of PE waste(GPETN)from 1976 to 2017.Outcomes:We find that the size and complexity of the GPETN had been growing until 2016.After the mid-1990s,PE waste basically flowed from developed economies,mainly the EU and the US,to developing economies such as China.Since 2001 when admitted into the WTO,China’s PE waste import surged until 2014 when it absorbed over 60%of global export.Regulations on solid waste import following the Green Fence campaign in 2013 resulted in substantial reductions in China’s import as well as the global export of PE waste after 2014.Several other developing economies,such as Malaysia,Turkey,and Vietnam,had transitioned to net importers,but their imports were insufficient to replace China as new recycling bases for PE waste.Conclusion:The results highlight the urgent need of a joint effort for developed and developing countries to build a stronger global circular economy system with sufficient capacity to treat PE waste locally.

关键词： Plastic waste polyethylene solid waste trade complex network waste management plastic recycling

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Environmental impacts of domestic resource extraction in China

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Ecosystem Health and Sustainability 2019年第1期5卷 67-78,I0013页

作者： Shen Zhao He-Ming Wang Wei-Qiang Chen Dong Yang Jing-Ru Liu Feng Shi State Environmental Protection key laboratory of Eco-Industry Northeastern UniversityShenyangChina key lab of urban Environment and Health Institute of Urban EnvironmentChinese Academy of ScienceXiamenFujianChina Xiamen Key Lab of Urban Metabolism XiamenFujianChina SDAS key laboratory of Scientific Decision-Making Institute of Science and Technology for Development of ShandongQilu University of Technology(Shandong Academy of Sciences)JinanChina Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijingChina

Introduction:The rapid development of economy has led to extensive raw material consumption and relevant environmental damage in China.To analyze environmental impacts and identify materials resulting in these environmental effects via raw material extraction,we combine economy-wide material flow accounting and life-cycle analysis methods to estimate environmental impacts of Chinese domestic extraction(DE)during the period of 1992–2015.The relationship between these increasing environmental impacts and Chinese GDP was also explored by decoupling analysis.Outcomes:Results show that Chinese DE increased by 372%during 1992–2015.The global warming potential,abiotic depletion potential,and respiratory inorganics of Chinese DE increased by 195%,46%,and 408%,respectively.In terms of specific materials,extraction of iron ores,gravel and sand,and coal induced the most environmental impacts.The relationship between environmental impacts and Chinese GDP/DE was characterized by relative decoupling.Conclusion:To minimize the environmental impacts of extraction,we recommend that the Chinese government improve its extraction techniques and reduce excess demand for materials with large extraction such as iron ores,gravel and sand,and coal.We also recommend researching alternative materials for scarce resources like molybdenum,gold,and fluorite.

关键词： Decoupling analysis economy-wide material flow accounting life cycle assessment environmental impact material flows

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In-use product and steel stocks sustaining the urbanization of xiamen, China

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Ecosystem Health and Sustainability 2019年第1期5卷 110-123,I0015页

作者： Lulu Song Chao Zhang Ji Han Wei-Qiang Chen key lab of urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamenFujianP.R.China Xiamen Key Lab of Urban Metabolism Institute of Urban EnvironmentChinese Academy of SciencesXiamenFujianP.R.China School of Economics and Management Tongji UniversityShanghaiP.R.China UN Environment-Tongji Institute of Environment for Sustainable Development Tongji UniversityShanghaiP.R.China Shanghai key lab for urban Ecological Processes and Eco-Restoration East China Normal UniversityShanghaiP.R.China University of Chinese Academy of Sciences BeijingP.R.China

Introduction:In-use product and material stocks are the amount of concerned manufactured products and materials in active use,and are essential components of urban ecosystem.Methods:This study estimates the dynamic in-use stocks of steel-containing products and steel in the city of xiamen,China,during 1980–2015 by applying a bottom-up accounting approach.We incorporate 55 categories of steel-containing products that are classified into five end-use sectors(i.e.,buildings,infrastructure,transportation equipment,machinery,and domestic appliances).Outcomes and Discussion:In-use stocks of 51%of the studied products kept increasing during 1980–2015,especially after 2000.Steel stocks have grown up to 4.9±1.4 tons per capita(t/cap)in 2015,from 0.5±0.2 t/cap in 1980.Buildings are the largest reservoirs,although its share decreased from 89%in 1980 to 68%in 2015.The dynamic spatial distribution indicates that steel stocks gradually expanded from urban core to suburban areas.Conclusion:Theresults help to explore how a city’s urbanization is sustained by the in-use stocks growth.In-use steel stocks,of which the growth is highly correlated to and probably driven by the population growth,GDP increase,and urban built-up area expansion,may serve as a supplementary indicator for urbanization.

关键词： In-use stocks urbanization industrial ecology steel xiamen material stocks and flows analysis

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Microbiological quality of roof tank water in an urban village in southeastern China

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Journal of Environmental Sciences 2023年第3期125卷 148-159页

作者： Dong Hu Jie Zeng Jing Chen Wenfang Lin Xinyan Xiao Mingbao Feng Xin Yu key laboratory of urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Shitang Community Health Service Center Xiamen 361026China College of the Environment and Ecology Xiamen UniversityXiamen 361005China

urban villages are unique residential neighborhoods in urban areas in China. Roof tanks are their main form of water supply, and water quality deterioration might occur in this system because of poor hygienic conditions and maintenance. In this study, water samples were seasonally collected from an urban village to investigate the influence of roof tanks as an additional water storage device on the variation in the microbial community structure and pathogenic gene markers. Water stagnation in the roof tank induced significant decreases in chlorine(p urban villages.

关键词： urban village Water storage tank Microbiological water quality Propidium monoazide(PMA)-qPCR Illumina sequencing

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Functional magnetic nanoparticles for facile viable but nonculturable bacteria separation and purification

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Frontiers of Environmental Science & Engineering 2016年第6期10卷 123-128页

作者： Chunming Wang Huirong Lin Chengsong Ye key lab of urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China

Viable But Nonculturable （VBNC） Bacteria, which represent a unique population of microorganisms in drinking water systems, have become a potential threat to human health. Current studies on VBNC ceils usually fail to obtain pure VBNC state bacteria, which may lead to inaccurate results. We therefore introduce a novel method of VBNC cell separation and puriticatlon in this paper. PAH-coated magnetic nanoparticles （MNPs） were synthesized and found to be capable of capturing and releasing bacterial cells with high efficiency. With the aid of an additional incubation step, VBNC cells were easily isolated and purified from normal bacteria using functional MNPs. Our method represents a new technique that can be utilized in studies of VBNCs.

关键词： Drinking water biosafety VBNC Nanoparticles Magnetic separation and purification

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Sources appointment and health risks of PM_(2.5)-bound trace elements in a coastal city of southeastern China

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Journal of Environmental Sciences 2024年第4期138卷 561-571页

作者： Ziyi Lin Xiaolong Fan Gaojie Chen Youwei Hong Mengren Li Lingling Xu Baoye Hu Chen Yang Yanting Chen Zhiqian Shao Jinsheng Chen Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China key lab of urban Environment and Health Institute of Urban EnvironmentChinese Academy ofSciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Minnan Normal University Zhangzhou 363000China

To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Sn,Ba,Pb)in PM_(2.5)were monitored from December 2020 to November 2021 in a representative city,xiamen.The concentrations of trace elements in xiamen displayed an obvious seasonal variation and were dominated by K,Fe,Al,Ca and Zn.Based on Positive Matrix Factorization analysis,source appointment revealed that the major sources of trace elements in xiamen were traffic,dust,biomass and firework combustion,industrial manufacture and shipping emission.According to health risk assessment combined with the source appointment results,it indicated that the average noncarcinogenic risk was below the threshold and cancer risk of four hazardous metals(Cr,Ni,As,Pb)exceeded the threshold(10^(-6)).Traffic-related source had almost half amount of contribution to the health risk induced by PM_(2.5)-bound trace elements.During the dust transport period or Spring Festival period,the health risks exceeded an acceptable threshold even an order of magnitude higher,suggesting that the serious health risks still existed in low PM_(2.5)environment at certain times.Health risk assessment reminded that the health risk reduction in PM_(2.5)at southeastern China should prioritize traffic-related hazardous trace elements and highlighted the importance of controlling vehicles emissions in the future.

关键词： PM_(2.5)-bound trace elements Seasonal variations Source appointment Health risks Traffic-related source

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Spatial patterns of urban green space and its actual utilization status in China based on big data analysis

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Big Earth Data 2021年第3期5卷 391-409页

作者： Yiyi Huang Tao Lin Guoqin Zhang Yongguan Zhu Zhiwei Zeng Hong Ye key laboratory of urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamenChina Coastal and Ocean Management Institute Xiamen UniversityXiamenChina

urban green space(UGS)is essential for sustainable urbanization and human well-being.The utilization status of UGS is closely related to the provision of ecosystem services for urban residents.Limitations on data availability,however,have led to the absence of a comprehensive approach for evaluating the actual utilization status of UGS at a large scale.Furthermore,differences in actual UGS utilization between intra-urban and peri-urban areas have not received enough attention.This study used big data analysis by combining point of interest(POI)and land use and cover change(LUCC)to quantify the spatial patterns of UGS utilization,and to evaluate the actual utilization status of UGS in 366 cities on the Chinese mainland.We also explored the differences in the actual utilization of UGS in intra-urban and peri-urban areas.The results showed that 94.01%of UGS resources in China had not been utilized.There was a clear pattern of spatial mismatch between the stock and the actual utilization of UGS,especially in the north-western region indicated by the Hu Huanyong Line.The actual utilization rate of UGS was closely related to the regional develop-ment level.There was a certain mismatch between the actual utilization and stock of intraurban green space(IUGS).The hot spots of the actual utilization rate of IUGS were in Yunnan,Guizhou,and Sichuan Provinces in southwestern China.The differ-ences in UGS actual utilization rates between IUGS and peri-urban green space(PUGS)were small in eastern China,but large in south-western and northwestern China.The actual utilization rate of IUGS in most Chinese cities was significantly larger than that of PUGS,indicating that PUGS were not well utilized.Our results provide scientific support for urban and regional planners in targeting specific areas for UGS design and development,and in optimizing future UGS planning in China.

关键词： urban green space actual utilization status big data spatial pattern China

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