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CH_4 uptake flux of Leymus chinensis steppe during rapid growth season in Inner Mongolia,China

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Science China Earth sciences 2010年第7期53卷 977-983页

作者： GENG Yuanbo1, LUO GuangQiang1,2.& YUAN GuoFu1 1 institute of geographic {2. and natural resources research, chinese Academy of {2., beijing 100101, China 2.graduate university of chinese Academy of {2., beijing 100049, China 1. institute of geographic {2. and {3. resources research Chinese Academy of Sciences Beijing 100101 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China

The influence of near ground atmosphere CH4 concentration, soil water content, soil Eh, plants, soil temperature, and pH on CH4 uptake flux of Leymus chinensis steppe during rapid growth season was studied using field in-situ measurement in Xilin River basin of Inner Mongolia, China. The results showed that CH4 uptake flux was positively correlated with near ground atmosphere CH4 concentration and soil Eh but negatively correlated with soil water content. Precipitation may decrease the CH4 flux by increasing the soil water content. The average fluxes of three treatments during the observation period were 1.52.(natural conditions, 1.51 (aboveground plants were excluded), and 2.00 mg m?2.d?1 (all plants were removed), respectively. The difference between the CH4 flux of natural condition treatment and that of removing aboveground plants treatment is small, whereas the flux of removing all plants treatment is larger than the other two treatments. This means that the contribution of aboveground plants to CH4 uptake flux is smaller than that of roots or roots-removing process. CH4 uptake flux is not sensitive to soil temperature and the narrow-ranged soil pH (6.3.–7.86). The Leymus chinensis steppe acts as a sink for CH4, and thus more studies should be focused on its affecting factors and related mechanisms.

关键词： CH4 uptake flux Leymus chinensis steppe affecting factors static opaque chamber/gas chromatography method

Impacts of the Wenchuan Earthquake on the Giant Panda Nature Reserves in China

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Journal of Mountain Science 2010年第2期7卷 197-206页

作者： DENG Xiangzheng JIANG Qunou GE Quansheng YANG LinSheng institute of geographic {2. and {3. resources research Chinese Academy of Sciences Beijing 100101 China Center for chinese Agricultural Policy Chinese Academy of Sciences Beijing 100101 China graduate university of the {2.Academy of {3. Beijing 100049 China

The Wenchuan Earthquake that occurred in May of 2.08 caused damages to large areas of Sichuan,Gansu,and Shaanxi provinces in *** from local governments and related management agencies show that the giant panda nature reserves in the earthquake-hit areas were heavily *** estimates in this paper of the impacts of the earthquake on the giant panda in the earthquake-hit areas were made based on the interpretation of remote sensing images and information collected by field survey.A rapid assessment method was designed to estimate the damages of the earthquake on giant panda *** using visual interpretation methods,we decoded the remote sensing images of the disaster area in the 49 giant panda nature *** results showed that the Wenchuan Earthquake and the succeeding secondary geological disasters caused great damages to the giant panda nature reserves and disturbed the normal life of the giant pandas there (e.g.,landscape fragmentation increased significantly).Undoubtedly,the life of the giant pandas there was ***,although the earthquake caused certain impacts on the giant pandas,it did not really threat their *** so,we still strongly advocate for protection of the giant pandas,and have prioritized a couple of measures to be taken to restore the giant panda nature reserves in the earthquake-hit areas.

关键词： Wenchuan earthquake Remote sensing Giant panda Giant panda nature reserve Rapid assessment method

Analysis of Comprehensive benefits of Transforming Slope Farmland to Terraces on the Loess Plateau:A case Study of the Yangou Watershed in Northern Shaanxi Province,China

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Journal of Mountain Science 2011年第3期8卷 448-457页

作者： XU Yong YANG bo TANG Qing LIU Guobin LIU Puling institute of geographic {2. and {3. resources research CAS Beijing 100101 China graduate university of {2. Academy of {3. Beijing 100049 China institute of Soil and Water Conservation CAS Yangling Shaanxi 712100 China

De-farming slope farmland has been an effective measure in recent years to improve environment and prevent soil and water loss on the Loess *** are different views about the defarming method,and also various de-farming patterns have been put into *** paper takes the Yangou Watershed in Shaanxi Province of China as a case for studying the comprehensive benefits of transforming slope farmland to *** on the day-by-day meteorological data of the Yan'an station in 2.05 and the data of terrain features,soil and land use data of the Yangou Watershed,the impact of transforming slope farmland on terraces were simulated and analyzed in aspects of yield increase and water-soil conservation under different topographic conditions with the aid of software ***,an empirical analysis was applied to study the effects of transforming slope farmland to terraces in the Yangou *** results show that:(1) The bigger the topographic gradient is,the more remarkable benefits it has in yield increase and water-soil conservation.(2. Farmland with slope below 5° could be retained,but farmland with slope above 15° should be converted to forest or grassland as soon as possible.(3. Transforming slope farmland to terraces has the same remarkable effects as the current policy of "Relieving and de-farming" in improving agricultural production conditions,safeguarding food security,raising permanent vegetation coverage rate,and preventing soil and water ***,it is more cost-effective than the policy of "Relieving and de-farming".It's strongly suggested that the policy of transforming slope farmland to terraces be carried out on the Loess Plateau without delay.

关键词： Slope farmland Terrace Comprehensive benefits Yangou Watershed Loess Plateau

Dynamics of the Coordination of Economy-Society and Resource-Environment in Shandong Peninsula,China

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chinese Journal of Population,resources and Environment 2012年第3期10卷 62-71页

作者： Han Rongqing Zhao Minghua institute of geographic {2. and {3. resources research CASBeijing 100101China graduate university of {2. Academy of {3. Beijing 100049China Population Recourses and Environment College of Shandong Normal UniversityJinan Shandong 250014China

Shandong Peninsula,as a more developed region in Shandong Province even the east coast of China,is facing challenges from resources and environment *** paper tried to track and assess the coordination status and the dynamic between resource-environment and economy-society systems in Shandong Peninsula during 2.01-2.08 in order to provide decision support for regional *** appraisal index system was built including five aspects of harmony degree(A),sustainability degree(b),opening degree(C),stability degree(D) and controllability degree(E).The results showed that:1) The coordination level of resource-environment and economy-society in Shandong Peninsula has continuously grown,and it has undergone three stages:no coordinated degree(2.01-2.02.,weak coordinated degree(2.03.2.06) and basically coordinated degree(2.07-2.08).2. Five indexes of criterion hierarchy also increased overall,but each index showed different *** degree,sustainability degree and opening degree rose all the time,while stability degree and controllability degree alternately rose and *** improvement of controllability degree was the slowest.3. The aggravating trend of environmental pollution was slowing *** economic growth was driven by industrial growth and urbanization typically and investment was still the main force to pull the regional economic *** the same time,technology and education were becoming more and more important for economic *** level of foreign capital utility declined and the geographical advantage of Shandong Peninsula was *** some characteristics of knowledge economy were *** resources become the main constraint factor of fast development in Shandong *** is necessary to further strengthen the coordination ability of government on regional sustainable development.

关键词： dynamics coordination of resource-environment andeconomy-society Shandong Peninsula

Impacts of climate change and grazing intensity on soil organic carbon in alpine meadow

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Impacts of climate change and grazing intensity on soil orga...

Phytolith evidence for rice cultivation and spread in Mid-Late Neolithic archaeological sites in central North China

2.11 International Conference on business Management and Electronic Information(bMEI 2.11)

作者： Xiaojia Li 1 2.Xianzhou zhang 1 Hongtao Jiang 3.Qinglong Ma 4 Zhenxi Shen 1 Yuzhi Fan 1 2.Wei Yan 1 2.1 Key Laboratory of Ecosystem Network Observation and Modeling institute of {2. sciences and natural resources research chinese Academy of sciences beijing China 2.graduate university of chinese Academy of Science beijing China 3.School of Geography beijing Normal university beijing China 4 NO.2.Middle School of Xilingol League Xilinhot Inner Mongolia China

In this paper,soil organic carbon was simulated in the next 50 years with CENTURY model in different climate scenarios at Damxung alpine meadow *** result shows that temperature and precipitation are the main contributor to the changes of soil organic *** in temperature and precipitation can reduce the accumulation of soil organic carbon resulting in the release of soil *** results are consistent in three climate change scenarios （temperature and precipitation increasing,temperature increasing and precipitation unchangeable,temperature unchangeable and precipitation increasing）.The content of soil organic carbon decreased,only slightly difference in extent in the three *** intensity was also a main factor to affect soil organic carbon and the influence on soil organic fractions was different.

关键词： soil organic carbon climate change CENTURY model alpine meadow

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Phytolith evidence for rice cultivation and spread in Mid-La...

Spatio-temporal Analysis of Urban Spatial Interaction in Globalizing China—A case Study of beijing-Shanghai Corridor

中国科学院地质与地球物理研究所第十届(2.10年度)学术年会

作者： Jianping zhang Key Laboratory of Cenozoic Geology and Environment, institute of Geology and Geophysics,{2. Academy of {3.,P.O.box 9825,beijing 100029,China and graduate university of {2. Academy of {3.,beijing 100049,China Houyuan Lu,Naiqin wu and Fengjiang Li,Key Laboratory of Cenozoic Geology and Environment,institute of Geology and Geophysics,{2. Academy of {3.,P.O.box 9825,beijing 100029,China Xiaoyan Yang,institute of geographic {3. and natural resources research,{2. Academy of {3.,{2.},China Weilin Wang and Mingzhi Ma,Shaanxi Provincial institute of Archaeology,Xi’an 710001,China Xiaohu zhang,College of Urban and Environmental {3.,Peking university,beijing 100871,China

The history of rice(Oryza sativa) cultivation in North China is ambiguous owing to a lack of evidence from rice remains with precise ages in archaeological *** this paper,we present rice phytolith evidence from six archaeological sites in the Guanzhong basin,central North China,dating from c.5500 to 2.00 cal.a bP(calibrated/ calendar ages) based on 19 *** phytoliths found in the three archaeological sites located on the second river terrace(Quanhu,Yangguanzhai and Anban) include three types of phytoliths from rice,namely bulliform, parallel-bilobe and *** findings suggest that the earliest cultivated rice in central North China occurred not later than c.5690 cal.a *** c.5500 cal.a bP,the farming pattern in the Guanzhong basin was characterized by dominant dry crops(***) and locally cultivated rice.A likely spread route of rice from the lower reaches of the Huanghe(Yellow) River towards the Guanzhong basin in central North China is speculated to have happened at c.5690 cal.a *** findings of this study help us to understand the farming pattern in the area and how rice spread across the semi-arid regions of East Asia.

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chinese geographical Science 2009年第2期19卷 126-134页

作者： wu wenjie {2. {3. JIN Fengjun DENG Yu institute of geographic {2. and {3. resources research Chinese Academy of Sciences Beijing 100101 China graduate university of the {2. Academy of {3. Beijing 100049 China

This paper aims to explore urban geography with a new perspective. Endowed with the urban geography connotations, an improved data field model is employed to integrate temporal dimension into spatial process of cities in a typical region in this article. Taking the beijing-Shanghai Corridor including 18 cities as an example, the authors chose the city centricity index (CCI) and the spatial data field model to analyze the evolution process and features of sub-region and urban spatial interaction in this corridor based on the data of 1991, 1996 and 2.02. Through the analy- sis, we found that: 1) with the improvement of the urbanization level and the development of urban economy, the cit- ies’ CCI grew, the urban spatial radiative potential enhanced and the radiative range expanded gradually, which reflects the urban spatial interaction’s intensity has been increasing greatly; 2. although the spatial interaction intensity among the cities and sub-regions in the beijing-Shanghai Corridor was growing constantly, the gap of the spatial interaction strength among different cities and sub-regions was widening, and the spatial division between the developed areas and the less developed areas was obvious; and 3. the intensity of the spatial interaction of beijing, Shanghai and their urban agglomerations was far greater than that in small cities of other parts of the corridor, and it may have a strong drive force on the choice of spatial location of the economic activities.

关键词： urban spatial interaction data field beijing-Shanghai Corridor China

Emerging contaminants:A One Health perspective

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The Innovation 2024年第4期5卷 140-170,139页

作者： Fang Wang Leilei Xiang Kelvin Sze-Yin Leung Martin Elsner Ying zhang Yuming Guo bo Pan Hongwen Sun Taicheng An Guangguo Ying bryan Wbrooks Deyi Hou Damian EHelbling Jianqiang Sun Hao Qiu Timothy MVogel Wei zhang Yanzheng Gao Myrna JSimpson Yi Luo Scott XChang Guanyong Su bryan MWong Tzung-May Fu Dong Zhu Karl JJobst Chengjun Ge Frederic Coulon Jean Damascene Harindintwali Xiankui Zeng Haijun Wang Yuhao Fu Zhong Wei Rainer Lohmann Changer Chen Yang Song Concepcion Sanchez-Cid Yu Wang Ali El-Naggar Yiming Yao Yanran Huang Japhet Cheuk-Fung Law Chenggang Gu Huizhong Shen Yanpeng Gao Chao Qin Hao Li Tong zhang Natàlia Corcoll Min Liu Daniel SAlessi Hui Li Kristian Kbrandt Yolanda Pico Cheng Gu Jianhua Guo Jianqiang Su Philippe Corvini Mao Ye Teresa Rocha-Santos Huan He Yi Yang Meiping Tong Weina zhang Fidèle Suanon Ferdi brahushi Zhenyu Wang Syed AHashsham Marko Virta Qingbin Yuan Gaofei Jiang Louis A.Tremblay Qingwei bu Jichun wu Willie Peijnenburg Edward Topp Xinde Cao Xin Jiang Minghui Zheng Taolin zhang Yongming Luo Lizhong Zhu Xiangdong Li Damiàbarceló Jianmin Chen baoshan Xing wulf Amelung Zongwei Cai Ravi Naidu Qirong Shen Janusz Pawliszyn Yong-guan Zhu Andreas Schaeffer Matthias C.Rillig Fengchang wu Gang Yu James M.Tiedje State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China university of chinese Academy of {2. Beijing 100049China Department of Chemistry Hong Kong Baptist UniversityHong KongChina HKbU institute of research and Continuing Education Shenzhen Virtual University ParkShenzhenChina Technical university of Munich TUM School of Natural SciencesInstitute of Hydrochemistry85748 GarchingGermany School of resources&Environment Northeast Agricultural UniversityHarbin 150030China Climate Air Quality Research UnitSchool of Public Health and Preventive MedicineMonash UniversityMelbourneVICAustralia Faculty of Environmental Science&Engineering Kunming University of Science&TechnologyKunming 650500China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory of Environmental Theoretical Chemistry South China Normal UniversityGuangzhouGuangdong 510006China Department of Environmental Science Baylor UniversityWacoTXUSA Center for Reservoir and Aquatic Systems research(CRASR) Baylor UniversityWacoTXUSA School of Environment Tsinghua UniversityBeijing 100084China School of Civil and Environmental Engineering Cornell UniversityIthacaNY 14853USA Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province Zhejiang University of TechnologyHangzhou 310014China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Laboratoire d’Ecologie Microbienne Universite Claude Bernard Lyon 1UMR CNRS 5557UMR INRAE 1418VetAgro Sup69622 VilleurbanneFrance Department of Pla

Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary *** global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the *** response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental Science-Policy Panel on Chemicals,Waste,and Pollution *** review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health *** for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international *** actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.

关键词： pollution planet contaminants

Identification and Categorization of Climate Change Risks

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chinese geographical Science 2008年第3期18卷 268-275页

作者： zhang Yuchong wu Shaohong DAI Erfu LIU Dengwei YIN Yunhe institute of geographic {2. and {3. resources research Chinese Academy of Sciences Beijing 100101 China graduate university of the {2. Academy of {3. Beijing 100049 China Development research Center Ministry of Water Resources Beijing 100038 China

The scientific evidence that climate is changing due to greenhouse gas emission is now incontestable, which may put many social, biological, and geophysical systems in the world at risk. In this paper, we first identified main risks induced from or aggravated by climate change. Then we categorized them applying a new risk categorization system brought forward by Renn in a framework of International Risk Governance Council. We proposed that ＂uncertainty＂ could be treated as the classification criteria. based on this, we established a quantitative method with fuzzy set theory, in which ＂confidence＂ and ＂likelihood＂, the main quantitative terms for expressing uncertainties in IPCC, were used as the feature parameters to construct the fuzzy membership functions of four risk types. According to the maximum principle, most climate change risks identified were classified into the appropriate risk types. In the mean time, given that not all the quantitative terms are available, a qualitative approach was also adopted as a complementary classification method. Finally, we get the preliminary results of climate change risk categorization, which might iay the foundation for the future integrated risk management of climate change.

关键词： climate change risk identification risk categorization uncertainty degree of membership