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2020 International Conference on Urban Construction and Management Engineering, ICUCME 2020

作者： Jin, Han Er-Fu, Dai Faculty of Geomatics Lanzhou Jiaotong University Lanzhou Gansu China Gansu Provincial Engineering Laboratory for National Geographic State Monitoring Lanzhou Gansu China Natl.-Loc. Jt. Eng. Res. Ctr. of Technol. and Applications for National Geographic State Monitoring Lanzhou Gansu China Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research CAS Beijing China University of Chinese Academy of Sciences Beijing China

Emergency material scheduling is an essential part of disaster prevention and mitigation. This paper builds up materials scheduling model based on system dynamics, real-simulation the process of emergency material scheduling in disaster prevention and mitigation, exploring the main factors that affect a city's emergency capacity. The result shows that: the higher the scheduling capacity of government emergency material, the city's emergency capacity can reach its peak level faster. This model can predict materials scheduling speed in real-time and provide the government's emergency administrative department with a theoretical foundation to formulate reasonable disaster prevention and mitigation plans. © Published under licence by IOP Publishing Ltd.

关键词： Scheduling

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Changes in Soil Nutrient Stoichiometric Ratios Reveal Increasing Phosphorus Limitation Along a Tropical Soil Chronosequence in Hainan Island, China

SSRN

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SSRN 2022年

作者： Zhao, Wen Huang, Lai-Ming Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing100049 China

Understanding the variations and controls of stoichiometric ratios of soil nutrients during different stages of soil evolution can provide a basis for ecosystem nutrient management and regulation. In the present study, soil nutrient contents and basic soil physicochemical properties (soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), available nitrogen (AN), available phosphorus (AP), pH, cation exchange capacity (CEC), and clay content (Cy)) were measured in a tropical soil chronosequence (0.09, 0.146, 0.64, 1.12, 1.81, and 2.30 million years) developed on basalt in the northern Hainan Island. The environmental factor data (annual average temperature (MAT), annual average rainfall (MAP), average annual evaporation (Ea), normalized differential vegetation index (NDVI), altitude (ALT), longitude (LON), and latitude (LAT)) were simultaneously extracted to understand the changes in and factors associated with soil nutrient stoichiometric ratios during different stages of soil development. Results showed that AN content decreased continuously with increasing soil age. TN, TP, AP, and SOC contents increased initially during the early stage of soil development, reaching a peak value in the 0.146 million-year-old soil profile (with profile weighted mean values of 1.14, 1.31, 3.53, and 11.25 g kg -1 , respectively). Thereafter, TP and AP fluctuated with increasing soil age (ranging from 0.34 to 0.75 g kg -1 and 0.90 to 2.49 mg kg -1 , respectively), whereas SOC exhibited a decreasing trend with aging soil. C:N (9.82–12.75), C:P (0.86–1.98), and N:P (0.86–1.98) remained relatively stable across the soil chronosequence, with the coefficient of variation (CV) 0.64 million years) developed on basalt in order to alleviate the increasing P limitation during the late stage of soil evolution. © 2022, The Authors. All rights reserved.

关键词： Soils

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Nitrogen use efciency of terrestrial plants in China: geographic patterns, evolution, and determinants

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Ecological Processes 2021年第1期10卷 967-979页

作者： Jiaqiang Liao Zhaolei Li Jinsong Wang Dashuan Tian Di Tian Shuli Niu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China. College of Resources and Environment University of Chinese Academy of SciencesBeijingChina. Research Center of Forest Management Engineering of State Forestry and Grassland Administration College of ForestryBeijing Forestry UniversityBeijingChina. Institute of Agricultural Sciences Department of Environmental Systems ScienceETHUniversitätsstrasse 28092 ZürichSwitzerland. Swiss Federal Institute for Forest Snow and Landscape Research WSLZürcherstrasse 1118903 BirmensdorfSwitzerland.

Background:Plant nitrogen use efciency(NUE)is an important ecological indicator that refects the capacity of a plant to transform nitrogen into production,which is essential for further elucidating plant growth and terrestrial ecosystem *** there are a growing number of studies that address NUE changes at local scales,the variations of NUE over large spatial scales remain *** this study,we analyzed the geographic patterns of NUE and explored its phylogenic and environmental drivers across 1452 species at 1102 sites in ***:NUE tended to decrease with latitude(r=−0.56),whereas it increased with longitude(r=0.54),and varied widely in diferent ecosystems and plant life ***,NUE was negatively correlated with plant foliar phosphorus concentration(r=−0.53),soil pH(r=−0.10),soil total phosphorus(r=−0.13)and available phosphorus(r=−0.05),but positively with the mean annual temperature(r=0.32),annual precipitation(r=0.27),and aridity index(r=0.26).NUE was signifcantly altered with phylogeny and evolved toward a lower value(r=−0.28),which may have been due to increasing nitrogen deposition and fxation in biogeochemical ***,the combination of foliar phosphorus concentration,phylogeny,climate,and soil properties accounted for 52.7%of the total variations of *** particular,foliar phosphorus concentration was the most important factor,whereas plant evolutionary history was second in contributing to NUE ***:Our study emphasizes the pivotal role of plant stoichiometry and phylogeny in nitrogen cycling and suggests incorporating them into earth system models to better understanding plant growth and nitrogen cycling in the context of environmental changes.

关键词： Nitrogen use efciency Foliar phosphorus Geographic pattern Stoichiometry Plant phylogeny Climate Soil properties

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中国典型草原植被高度组合的普适性规律与区域差异

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Journal of Plant Ecology 2023年第1期16卷 203-213页

作者： Jihua Hou Qiuyue Li Pu Yan Li Xu Mingxu Li Nianpeng He School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Vegetation Ecology Ministry of EducationNortheast Normal UniversityChangchun 130024China

详细测定每株植物高度是精细评估草地生态系统中植物群落高度结构的重要方法,并经常用来分析草地植被生长与环境因子关系的普适性和区域差异。本研究在我国青藏高原、内蒙古高原和黄土高原,分别沿降水梯度布设了3条从草甸-草原-荒漠的... 详细信息

详细测定每株植物高度是精细评估草地生态系统中植物群落高度结构的重要方法,并经常用来分析草地植被生长与环境因子关系的普适性和区域差异。本研究在我国青藏高原、内蒙古高原和黄土高原,分别沿降水梯度布设了3条从草甸-草原-荒漠的典型草地生态系统样带。研究结果发现,我国3大高原的草地生态系统植被平均高度为30.38±22.44 cm,其中黄土高原最高,内蒙古高原次之,青藏高原最低。这3个高原草地生态系统的植被聚合高度分布都呈现偏正态分布(0.91,3.60),而且从青藏、内蒙古到黄土高原,该分布逐渐趋于正态(0,3)。然而,在青藏高原的草甸和荒漠生态系统中分别呈现出指数分布和均匀分布。在3大高原中,气候和土壤营养对植被平均高度解释率超过70%,然而对植被聚合高度的解释率最高仅为29%(青藏高原)。从青藏高原、内蒙古高原至黄土高原,植被平均高度对环境综合响应强度逐渐增强,具体表现为气温、降水的影响逐渐增强,而辐射、风速和营养物浓度影响逐渐减弱。我们的研究表明,正态分布是草地植被高度构建的普适性原则,而环境因素的协同作用在不同区域存在差异。

关键词：草地植被高度群落结构环境变化样带

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FOREST TYPE CONTROLS THE LANDSCAPE VARIATION OF SOIL RESPIRATION IN A HILLY REGION IN SUBTROPICAL CHINA

FOREST TYPE CONTROLS THE LANDSCAPE VARIATION OF SOIL RESPIRA...

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2010年亚洲通量网会议(Asiaflux workshop2010)

作者： Y.-D.Wang H.-M.Wang Z.-Q.Ma W.-J.Zhang Z.-L.Wang 1Qianyanzhou Ecological Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Tianjin Key Laboratory of Water Environment and Resources Tianjin Normal UniversityTianjin 300387China Qianyanzhou Ecological StationKey Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Tianjin Key Laboratory of Water Environment and ResourcesTianjin Normal UniversityTianjin 300387China

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APPLICATION OF MODEL-DATA SYNTHESIS ON SIMULATING CARBON AND WATER FLUXES AT FORESTED ecosystemS IN CHINAFLUX

APPLICATION OF MODEL-DATA SYNTHESIS ON SIMULATING CARBON AND...

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2010年亚洲通量网会议(Asiaflux workshop2010)

作者： Min Liu Honglin He Xiaomin Sun Li Zhang Guirui Yu Graduate University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 1O0101China

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Decrease of nitrogen cycle gene abundance and promotion of soil microbial-N saturation restrain increases in N2O emissions in a temperate forest with long-term nitrogen addition

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Chemosphere 2023年第1期338卷

作者： Shang, Shuaishuai Song, Minghua Wang, Chunmei Dou, Xiaomin Wang, Jiaxin Liu, Fangfang Zhu, Chenying Wang, Shiqi College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences A11 Datun Road Chaoyang District Beijing100101 China

Increases in soil available nitrogen (N) influence N-cycle gene abundances and emission of nitrous oxide (N2O), which is primarily due to N-induced soil acidification in forest. Moreover, the extent of microbial-N saturation could control microbial activity and N2O emission. The contributions of N-induced alterations of microbial-N saturation and N-cycle gene abundances to N2O emission have rarely been quantified. Here, the mechanism underlying N2O emission under N additions (three chemical forms of N, i.e., NO3−-N, NH4+-N and NH4NO3–N, and each at two rates, 50 and 150 kg N ha−1 year−1, respectively) spanning 2011–2021 was investigated in a temperate forest in Beijing. Results showed N2O emissions increased at both low and high N rates of all the three forms compared with control during the whole experiment. However, N2O emissions were lower in high rate of NH4NO3–N and NH4+-N treatments than the corresponding low N rates in the recent three years. Effects of N on microbial-N saturation and abundances of N-cycle genes were dependent on the N rate and form as well as experimental time. Specifically, negative effects of N on N-cycle gene abundances and positive effects of N on microbial-N saturation were demonstrated in high N rate treatments, particularly with NH4+ addition during 2019–2021. Such effects were associated with soil acidification. A hump-backed trend between microbial-N saturation and N2O emissions was observed, suggesting N2O emissions decreased with increase of the microbial-N saturation. Furthermore, N-induced decreases in N-cycle gene abundances restrained N2O emissions. In particular, the nitrification process, dominated by ammonia-oxidize archaea, is critical to determination of N2O emissions in response to the N addition in the temperate forest. We confirmed N addition promoted soil microbial-N saturation and reduced N-cycle gene abundances, which restrained the continuous increase in N2O emissions. It is important for understanding the forest-N

关键词： Enzyme activity

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Predictability of Functional Diversity Depends on the Number of Traits

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Journal of Resources and Ecology 2021年第3期12卷 332-345页

作者： ZHANG Zihao HOU Jihua HE Nianpeng Key Laboratory of Forest Resources and Ecosystem Process Beijing Forestry UniversityBeijing 100083China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Vegetation Ecology of Ministry of Education Institute of Grassland ScienceNortheast Normal UniversityChangchun 130024China

Analysis of functional diversity, based on plant traits and community structure, provides a promising approach for exploration of the adaptive strategies of plants and the relationship between plant traits and ecosystem functioning. However, it is unclear how the number of plant traits included influences functional diversity, and whether or not there are quantitatively dependent traits. This information is fundamental to the correct use of functional diversity metrics. Here, we measured 34 traits of 366 plant species in nine forests from the tropical to boreal zones in China. These traits were used to calculate seven functional diversity metrics: functional richness(functional attribute diversity(FAD), modified FAD(MFAD), convex hull hypervolume(FRic)), functional evenness(FEve), and functional divergence(functional divergence(FDiv), functional dispersion(FDis), quadratic entropy(Rao Q)). Functional richness metrics increased with an increase in trait number, whereas the relationships between the trait divergence indexes(FDiv and FDis) and trait number were inconsistent. Four of the seven functional diversity indexes(FAD, MFAD, FRic, and RaoQ) were comparable with those in previous studies, showing predictable trends with a change in trait number. We verified our hypothesis that the number of traits strongly influences functional diversity. The relationships between these predictable functional diversity metrics and the number of traits facilitated the development of a standard protocol to enhance comparability across different studies. These findings can support integration of functional diversity index data from different studies at the site to the regional scale, and they focus attention on the influence of quantitative selection of traits on functional diversity analysis.

关键词： trait functional diversity richness evenness divergence stability predictability

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Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks

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Environmental Science and Ecotechnology 2024年第5期21卷 123-132页

作者： Di Shen Yu Li Yafeng Wang Shouliang Huo Yong Liu Junjie Jia Shuoyue Wang Kun Sun Yang Gao College of Earth and Environment Science Lanzhou UniversityLanzhou730000PR China State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing100101PR China Chinese Research Academy of Environmental Sciences Beijing100012PR China College of Environmental Sciences and Engineering Peking UniversityBeijing1008714PR China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101PR China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049PR China

The evasion of carbon dioxide(CO_(2))from lakes significantly influences the global carbon *** global climatic transformations,the role of Qingzang Plateau(QZP)lakes as carbon(C)sources or sinks remains a subject of ***,accurately quantifying their contribution to the global carbon budget presents a formidable ***,spanning half a century(1970e2020),we utilize a synthesis of literature and empirical field data to assess the CO_(2) exchange flux of QZP *** find markedly higher CO_(2) exchange flux in the southeast lakes than that in the northern and western regions from 1970 to *** this time,both freshwater and saltwater lakes served primarily as carbon *** annual CO_(2) exchange flux was estimated at 2.04±0.37 Tg(Tg)C yr1,mainly influenced by temperature *** CO_(2) exchange flux patterns underwent a geographical inversion between 2000 and 2020,with increased levels in the west and decreased levels in the ***,CO_(2) emissions from freshwater lakes diminished,and certain saltwater lakes in the QTP transitioned from carbon sources to *** 2000 to 2020,the annual CO_(2) exchange flux from QZP lakes is estimated at 1.34±0.50 Tg C yr1,with solar radiation playing a more pronounced role in carbon ***,over the past five decades,QZP lakes have generally functioned as carbon ***,the total annual CO_(2) emissions have declined since the year 2000,indicating a potential shift trend from being a carbon source to a sink,mirroring broader patterns of global climate *** findings not only augment our understanding of the carbon cycle in plateau aquatic systems but also provide crucial data for refining China's carbon budget.

关键词： Carbon source Carbon sink Carbon exchange flux Qingzang Plateau Global climate change

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Modelling Soil Greenhouse Gas Fluxes from a Broad-leaved Korean Pine Forest in Changbai Mountain: Forest-DNDC Model Validation

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Journal of Resources and Ecology 2019年第2期10卷 127-136页

作者： YE Shu GUO Chuying HAN Jiayin ZHANG Leiming DAI Guanhua WEN Xuefa YU Guirui 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 100190 China Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

Fluctuations in soil greenhouse gas(GHG)are an important part of the terrestrial ecosystem carbon-nitrogen cycle,but uncertainties remain about the dynamic change and budget assessment of soil GHG *** high frequency and consecutive soil GHG fluxes measured with an automatic dynamic chamber system,we tested the applicability of the current Forest-DNDC model in simulating soil CH4,CO2 and N2O fluxes in a temperate broad-leaved Korean pine forest at Changbai *** results showed that the Forest-DNDC model reproduced general patterns of environmental variables,however,simulated seasonal variation in soil temperature,snow melt processes and soil moisture partly deviated from measured variables,especially during the non-growing *** modeled CH4 flux was close to the field measurement and co-varied mainly with soil temperature and *** modeled soil CO2 flux had the same seasonal trend to that of the observation along with variation in temperature,however,simulated CO2 flux in the growing season was *** modeled N2O flux attained a peak in summer due to the influence of temperature,which was apparently different from the observed peak of N2O flux in the freeze-thaw ***,both modeled CO2 flux and N2O flux were dampened by rainfall *** from consistent estimation of annual soil CH4 flux,the annual accumulation of CO2 and N2O was *** is still necessary to further optimize model parameters and processes using long-term high-frequency observation data,especially transference of heat and water in soil and GHG producing *** work will improve modeling,ecosystem carbon-nitrogen budget assessment and estimation of soil GHGs flux from the site to the region.

关键词： soil GHGs flux dynamic chamber method forest-DNDC temperate forest

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