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Longer conserved alpine forests ecosystem exhibits higher stability to climate change on the Tibetan Plateau

Journal of Plant Ecology 2019年第4期12卷 645-652页

作者： Jian Li Nan Cong Jiaxing Zu Yuqin Xin Ke Huang Quan Zhou Yaojie Liu Lin Zhou Li Wang Yang Liu Ge Zhang Southwest Branch of State Grid Corporation of China Chengdu 610094China Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100090China Xizang Xinhe Supervision and Consulting Limited Company Lhasa 850000China International Institute for Earth System Science Nanjing UniversityNanjing 210023China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Peking University Shenzhen Graduate School Shenzhen 518055China State Grid Sichuan Electric Power Company Chengdu 610094China School of Urban and Environment Liaoning Normal UniversityDalian 116029China Heilongjiang University of Science and Technology Harbin 150001China

Aims Vegetation dynamics are simultaneously regulated by climate change and anthropogenic *** the 1980s,climate has been warming on the Tibetan Plateau(TP)at a rate higher than North Hemisphere *** activities,including grazing,farming,and urbanization,are also influencing the alpine ecosystem on the ***,an ensemble of large engineering projects,such as power transported from west to east by State Grid,has been in operation on the *** studies disentangling effects of climate and anthropogenic activities interference are still lacking for the forest ecosystems on the *** overarching objectives of this study were to separate effects of natural climates and human interferences on forest ecosystem dynamics on the *** We compared vegetation activities of two typical natural reserves(Gongbu natural reserve,GNR,and Yarlung zangbo river grand canyon natural reserve,YNR)and their surroundings in southeastern Tibet(outside of the natural reserves,ONR)using long-term satel-lite normalized difference vegetation index(NDVI)*** regression and partial correlation analyses were constructed for the relationship between vegetation activity and climates to evaluate the distinct climate effects on the two natural *** Findings The two natural reserves were established at different time,which were related to anthropogenic activities impact *** results showed that the annual mean NDVI fluctuated between 0.5 and 0.6 in the relatively longer reserved YNR,which was re-markably higher than those in other regions(with NDVI lower than 0.45).The vegetation vigor in the YNR showed neither a sig-nificant temporal trend nor significant relationship with ***,vegetation vigor exhibited a significant increasing trend during the last three decades(0.012/decade)at the *** inter-decadal analysis turned out positive relationships between vegetation vigor and annual temperature since late 1990s u

关键词： climate change human interference natural reserves vegetation activity Southeastern Tibet

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Corrigendum to "Environmental impact of adult incontinence products in China in the context of population aging" [Sci. Total Environ. 875 (2023) 162596]

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The Science of the total environment 2023年 891卷 164571页

作者： Xinkai Gu Mingxing Sun Xinyi Long Huijing Deng Yutao Wang Fudan Tyndall Center Department of Environmental Science & Engineering Fudan University Shanghai 200438 China. Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China. Fudan Tyndall Center Department of Environmental Science & Engineering Fudan University Shanghai 200438 China Institute of Eco-Chongming (IEC) No.3663 Northern Zhongshan Road Shanghai 200062 China IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather Shanghai China Shanghai Institute for Energy and Carbon Neutrality Strategy Fudan University Shanghai China. Electronic address: yutaowang@***.

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Analyzing the velocity of urban dynamic over northeastern China using DMSP-OLS night-time lights

Analyzing the velocity of urban dynamic over northeastern Ch...

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ISPRS Geospatial Week 2017

作者： Zhou, Yuke Key Laboratory of Ecosystem Network Observation and Modeling IGSNRR CAS Beijing China

Stable night-time lights (NTL) data from the Defense Meteorological Satellite Program Operational Line-scan System (DMSP-OLS) can serve as a good proxy for anthropogenic development. Here DMSP-OLS NTL data was used to detect the urban development status in northeastern China. The spatial and temporal gradients are combined to depict the velocity of urban expanding process. This velocity index represents the instantaneous local velocity along the Earth's surface needed to maintain constant NTL condition, and has a mean of 0.36km/yr for northeastern China. The velocity change of NTL is lower in the urban center and its near regions, and the suburbs show a relatively high value. The connecting zones between satellite cities and metropolis have also a rapid rate of NTL evolution. The dynamic process of urbanization over the study area is mainly in a manner of spreading from urban cores to edges. The rank size of the velocity for the prefectures is analyzed and a long tail distribution is found. The velocity index can provide insights for the future pattern of urban sprawl. © Authors 2017. CC BY 4.0 License.

关键词： Velocity

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N concentration of old leaves and twigs is more sensitive to stand density than that of young ones in Chinese fir plantations： a case study in subtropical China

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Journal of Forestry Research 2018年第1期29卷 163-169页

作者： Yuebao Di Xiaoli Fu Huimin Wang Wenhua Li Silong Wang Qianyanzhou Ecological Research Station Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 People's Republic of China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100190 People's Republic of China Jiangxi Key Laboratory of Ecosystem Processes and Information Ji'an 343725 People's Republic of China Huitong Experimental Station of Forest Ecology Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Chinese Academy of Sciences Sbenyang 110016 People' s Republic of China

Young leaves are conventionally used in the analysis to study the nutrient status of evergreen plants and their responses to environmental changes, but the role of old leaves remains poorly understood. We selected two stand types in 31-year-old Chinese fir（Cunninghamia lanceolata） plantations with similar soil conditions but different stand densities, to test the hypothesis that nitrogen（N） concentration of old leaves and twigs is more sensitive to stand density than that of young ones. Leaves and twigs were sampled and sorted into young（one-year-old） and old（two-and three-year-old） groups. Significant differences in N concentration and carbon： nitrogen ratio between the low-density stand and high-density stand were only found in the old leaves and twigs but not in the young *** the N resorption efficiency did not vary significantly with stand density, the annual N resorption rates were increased in old leaves and relatively young twigs at high stand density. These results show the potential use of old tissues in the nutrient analysis in Chinese fir plantations. Testing the generality of these results could improve the use of foliar analysis as an indicator of nutrient status and environmental changes in evergreen tree species.

关键词： Foliar analysis Twig Nitrogen Nutrient resorption Stand density

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Chinese Cropland Quality and Its Temporal and Spatial Changes due to Urbanization in 2000–2015

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Journal of Resources and Ecology 2019年第2期10卷 174-183页

作者： WANG Chunyu SUN Xiaofang WANG Meng WANG Junbang DING Qingfu College of Geography and Tourism Qufu Nonnal University Rizhao Shandong 276826 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Shangdong Provincial Institute of Land Surveying and Mapping Jinan 250013 China

The acceleration of urbanization has led to the occupation of more cropland, especially higher quality cropland, which could pose a huge threat to food security and have other implications for the inadequate cropland resource supply in China. Though the spatial status of Chinese cropland quality has been assessed, its temporal changes since 2000 to 2015 are still not clear. An accumulated probability distribution method was used to determine the criteria of cropland quality using the net primary production data product(MOD17) from Moderate Resolution Imaging Spectroradiometer(MODIS). Then the cropland quality of higher, median and lower production was spatially mapped and its changes due to occupation by urbanization were analyzed through the land use changes(LUCC) data primarily from Landsat TM images in the three periods of 2000–2005, 2005–2010, and 2010–*** results showed that of the total cropland reduction area the proportion taken by urbanization increased from47.29% in the early stage to 77.46% in the recent period. The quality of Chinese cropland was dominated by lowand medium-yield fields, accounting for 40.81% and 48.74%, respectively, with high-yield fields accounting for only 10.44% of the total cropland in the country in 2000. The high-yield areas have been seriously threatened by the expansion of construction land fields, with the ratio of high-yield area to total area occupied by urbanization increasing from 9.71% in 2000–2005 to 15.63% in 2010–2015. Spatially, this phenomenon has been moving from eastern and southern China to central and western China, especially in Northwest China where the ratio has arrived at the highest proportion, with 52.97% of high-yield cropland in the total land taken by the expansion by 2015. This study not only provides a method to assess cropland quality but also reveals the threatening trend from the expansion of urbanization on high-quality cropland. More attention should be paid to the latter in land use planning

关键词： cropland quality cropland quantity urbanization spatial-temporal changes remote sensing

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Review of Methods to Quantify Trade-offs among ecosystem Services and Future Model Developments

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Journal of Resources and Ecology 2019年第2期10卷 225-233页

作者： WU Baiqiu WANG Junbang QI Shuhua WANG Shaoqiang LI Yingnian School of Geography and Environment Jiangxi Normal University Nanchang 330022 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Chinese Academy of Science Beijing 100101 China Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining 810001 China School of Geography and Information Engineering China University of Geosciences Wuhan 430074 China

ecosystem services are spatially heterogeneous and temporal variability, which results in trade-offs,synergies and neutrality. The trade-off is a key problem in ecosystem management and requires optimized decision-making research. This paper reviews methods for identifying trade-offs and suggest future model developments. We conclude that(1) ecosystem service assessment depends on quantitative indicators and its modeling;(2)scenario analysis, multi-objective analysis and production possibility boundary are an effective means of ecosystem service trade-off decision-making;(3) future research needs to strengthen ecosystem service supply and demand flow and assist decision-making ecosystem mapping. Finally, integrated models should be developed to simulate and diagnose different scenarios and to optimize measures in land and ecosystem management for sustainability.

关键词： ecosystem service function trade-off quantitative methods

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Temperature Affects New Carbon Input Utilization by Soil Microbes: Evidence based on a Rapid δ^(13)C Measurement Technology

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Journal of Resources and Ecology 2019年第2期10卷 202-212页

作者： CAO Yingqiu ZHANG Zhen XU Li CHEN Zhi HE Nianpeng Resources and Environment College Anhui Agricultural University Hefei 230036 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academyof Sciences Beijing 100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China Institute of Grassland Science Northeast Normal University and Key Laboratory of Vegetation Ecology Ministry of Education Changchun 130024 China

Strong and rapid responses of soil microbial respiration to pulses,such as those from available soil organic matter(SOM)or water input from precipitation(especially in arid areas),are ***,how soil microbes utilize new SOM inputs and the effects that temperature may have on their activities are unclear owing to the limitation in the application of traditional isotopic techniques at minute *** the present study,we developed a system of measuring 12CO2 and δ^13C minutely and synchronously under controlled incubation temperatures,i.e.,for 48 h at 7,10,15,20,and 25℃,to explore the carbon utilization strategies of soil *** measured the respiration rates of soil microbes in response to different carbon sources,i.e.,added glucose(Rg)and initial SOM(Rs),as well as the total respiration rate(Rt).All responses were rapid and characterized by unimodal ***,the characteristic values of these curves,such as the maximum of rate(R-max),the time required to achieve R-max,and the ratio of the duration of R-max to that of 1/2 R-max,were all dependent on incubation ***,temperature greatly influenced the strategy that microorganisms employed to utilize different carbon *** effects of temperature on the intensity of the microbial respiratory response and the ratio of Rg/Rs are important for evaluating the effect of land-use changes or variations in seasonal temperature on SOM turnover and should be considered in ecological models in future studies.

关键词： soil respiration decomposition isotopic pulse soil organic matter turnover

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Separating the impacts of climate change and human activities on actual evapotranspiration in Aksu River Basin ecosystems, Northwest China

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Hydrology Research 2018年第6期49卷 1741-1752页

作者： Yang, Peng Xia, Jun Zhan, Chesheng Chen, Xuejuan Qiao, Yunfeng Chen, Jie Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Water Resources and Hydropower Engineering Sciences Wuhan University Wuhan430000 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China

Separating the impacts of climate change and human activity on actual evapotranspiration (ET) is important for reducing comprehensive risk and improving the adaptability of water resource systems. In this study, the spatiotemporal distribution of actual ET in the Aksu River Basin, Northwest China, during the period 2000–2015 was evaluated using the Vegetation Interfaces Processes model and Moderate Resolution Imaging Spectroradiometer-Normalized Difference Vegetation Index. The impact of climate change and human activity on actual ET were separated and quantified. The results demonstrated that: (1) the annual pattern of actual ET per pixel exhibited the highest values for arable land (average 362.4 mm/a/pixel), followed by forest land and grassland (average of 159.6 and 142.8 mm/a/pixel, respectively). Significant increasing linear trends (p © IWA Publishing 2018

关键词： Climate change

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Quantitative Classification and Ordination of Plant Communities in the Upper and Middle Reaches of the Yarlung Zangbo River Basin

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Journal of Resources and Ecology 2019年第4期10卷 389-396页

作者： WANG Tong WANG Jingsheng DING Yuke LIU Wenjing BAO Xiaoting LI Chao Qianyanzhou Ecological Research Station Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China Forest Inventory and Planning Institute of Tibet Autonomous Region Lhasa 850000 China School of Environment and Natural Resources Renmin University of China Beijing 100872 China

Based on vegetation survey data and environmental data of the Yarlung Zangbo River Basin, we conducted a quantitative ecological analysis of the vegetation community composition and the relationship between species and the environment in the study area. The results showed that 44 sampling sites and 68 plant species in the study area can be classified into seven subtypes: Artemisia minor + Stipa purpurea;Artemisia demissa + Stipa purpurea + Artemisia wellbyi;Kobresia pygmaea;Trikeraia hookeri;Sophora moorcroftiana + Cotoneaster multiflorus + Pennisetum centrasiaticum;Artemisia frigida;Potentilla fruticosa + Orinus thoroldii. Detrended correspondence analysis(DCA) indicated that both longitude and altitude play important roles in site and species distribution patterns. In addition, canonical correspondence analysis(CCA) revealed that in the upper and middle reaches of the Yarlung Zangbo River Basin, changes in temperature and precipitation caused by longitude are the main factors controlling the formation and transition of vegetation community types. Moreover, natural vegetation could be divided into three types: desert steppe community(source area), alpine steppe community(middle reaches region), and shrub community(confluence of Yarlung Zangbo River and Nyangqu River).

关键词： upper and middle reaches of the Yarlung Zangbo River plant community quantitative classification ordination

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Responses of greenhouse gas fluxes to experimental warming in wheat season under conventional tillage and no-tillage fields

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Journal of Environmental Sciences 2017年第4期29卷 314-327页

作者： Chun Tu Fadong Li Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences University of Chinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences

Understanding the effects of warming on greenhouse gas（GHG, such as N2O, CH4 and CO2 ）feedbacks to climate change represents the major environmental issue. However, little information is available on how warming effects on GHG fluxes in farmland of North China Plain（NCP）. An infrared warming simulation experiment was used to assess the responses of N2O, CH4 and CO2 to warming in wheat season of 2012–2014 from conventional tillage（CT） and no-tillage（NT） systems. The results showed that warming increased cumulative N2O emission by 7.7% in CT but decreased it by 9.7% in NT fields（p 〈 0.05）. Cumulative CH4 uptake and CO2 emission were increased by 28.7%–51.7% and 6.3%–15.9% in both two tillage systems,respectively（p 〈 0.05）. The stepwise regressions relationship between GHG fluxes and soil temperature and soil moisture indicated that the supply soil moisture due to irrigation and precipitation would enhance the positive warming effects on GHG fluxes in two wheat ***, in 2013, the long-term drought stress due to infrared warming and less precipitation decreased N2O and CO2 emission in warmed treatments. In contrast, warming during this time increased CH4 emission from deep soil depth. Across two years wheat seasons, warming significantly decreased by 30.3% and 63.9% sustained-flux global warming potential（SGWP） of N2O and CH4 expressed as CO2 equivalent in CT and NT fields, respectively. However, increase in soil CO2 emission indicated that future warming projection might provide positive feedback between soil C release and global warming in NCP.

关键词： Climate warming Greenhouse gas fluxes（N2O CH4 CO2） Conventional tillage No-tillage Soil temperature Soil moisture

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