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The Correction ground spectral model for estimating above-ground net primary productivity at the peak of growing season on Meadow Steppe, Hulunbeier, Inner Mongolia, China

The Correction ground spectral model for estimating above-gr...

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International Conference on Agro-Geoinformatics

作者： Zhaoyan Diao Shihai Lv Chaoyang Feng Derong Su Liang Sun Xue Tian The Key Laboratory of Silviculture and Conservation of Ministry of Education Beijing Forestry University Beijing China State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Research Academy of Environmental Sciences Beijing China

On the surface of hyperspectral data of remote sensing to estimate grassland biomass, the soil water content, organic matter content important impact on the model application. An ASD Fieldspec 3 spectroradiometer was used for spectral measurements of the Hulunbeier Meadow Steppe, Inner Mongolia, China, in late July, 2013. Ground spectral models were built to estimate the Above-ground Net Primary Productivity (ANPP) at the peak of the growing season from the Correction Normalized Difference Vegetation Index (C NDVI ) measured in the field. The SPSS software were used to assess relationships between ANPP and C NDVI . Based on the coefficient of determination (R 2 ), quadratic model (R 2 =0.808) and exponential model (R 2 =0.717) were batter than others. Error analysis shows that the linear equation has the biggest standard error of the prediction (SE = 82.42g/m 2 ), the logarithmic curve equation has the smallest SE (SE=18.59g/m 2 ). After considering all factors, a quadratic equation between ANPP and C NDVI (ANPP=3738.048 NDVI MODIS 2 -259.1588NDVI MODIS +1309.847, R2=0.808, SE=66.25g/m 2 , MEC=0.820, P

关键词： Vegetation mapping Biomass Biological system modeling Remote sensing Mathematical model Indexes Soil

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大规模人工造林是否会加剧中国北方土壤水分亏缺?

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Science Bulletin 2024年第10期69卷 1506-1514页

作者：王秋铭刘鸿雁梁博毅石亮伍露曹静 College of Urban and Environmental Sciences and PKU Saihanba StationPeking UniversityBeijing 100871China College of Forestry Precision Forestry Key Laboratory of BejingBejing Forestry UniversityBeijing 10083China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China China Meteorological Administration Training Center Beijing 100081China State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Regional Eco-process and Function AssessmentChinese Research Academy of Environmental SciencesBeijing 100012China

Trading water for carbon has cautioned large-scale afforestation in global ***,model simulations suggested that the consumption of soil water could be partially offset by increasing precipitation due to vegetation feedback.A systematic meta-analysis of long-term and large-scale field observations is urgently required to address the abovementioned limitations,and the implementation of large-scale afforestation since 1978 in northern China provides an ideal *** study collected data comprising 1226 observations from 98 sites in northern China to assess the variation in soil water content(SWC)with stand age after afforestation and discuss the effects of tree species,precipitation and conversions of land use types on *** found that the SWC has been decreased by coniferous forest and broadleaf forest at rates of 0.6 and 3.2 mm decade-1,respectively,since *** is a significant declining trend of SWC with the stand age of plantations,and the optimum growth stage for plantation forest is 0-20 a in northern ***,we found increases in SWC for the conversion from grassland to forest and in the low-precipitation region,both are corresponding to the increased SWC in coniferous *** study implies that afforestation might lead to a soil water deficit crisis in northern China in the long term at the regional scale but depends on prior land use types,tree taxa and the mean annual precipitation regime,which sheds light on decision-making regarding ecological restoration policies and water resource management in drylands.

关键词： Soil water Afforestation Tree planting Land use changes Arid and semiarid area

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A National key R&D Program: Technologies and Guidelines for Monitoring Ecological Quality of Terrestrial Ecosystems in China

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Journal of Resources and Ecology 2019年第2期10卷 105-111页

作者： WANG Shaoqiang WANG Junbang ZHANG Leiming XIAO Zhishu WANG Feng SUN Nan LI Daiqing CHEN Bin CHEN Jinghua LI Yue WANG Xiaobo WANG Miaomiao Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Chinese Academy of SciencesBeijing 100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture. Institute of Zoology Chinese Academy of Sciences Beijing 100101 China Institute of Desertification Studies Chinese Academy of Forestry Beijing 100091 China Key Laboratory of Crop Nutrition and Fertilization Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 China State Environment Protection Key Laboratory of Regional Eco-process and Function Assessment State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China

Ecological quality is defined as the stability, adaptability and resilience of an ecosystem. Monitoring and assessing ecological quality are important bases for China’s ecological civilization construction. The national key research and development program "Technologies and guidelines for monitoring ecological quality of terrestrial ecosystems in China", launched in July 2017, includes plans to study the observation technologies and provide guidelines on the ecological in-situ observation, the regional biodiversity and ecosystem function monitoring and its applications, all of which contribute to national ecological quality assessment. A year after its implementation,some important progress has been achieved, such as building the indicator system for comprehensive monitoring of ecological quality and improvement of the methods, mass data transmission, infrared camera-based monitoring of biodiversity, multi-angle automatic spectral observation systems, and unmanned aerial vehicle(UAV) based desert monitoring. We have organized this special issue and attempted to introduce the monitoring techniques and assessment methods on ecological quality from different perspectives in order to further promote the development of ecology and its observation methods.

关键词： ecological quality ecological factors biodiversity ecosystem function monitoring technology monitoring guideli nes

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functional diversity and redundancy of subalpine meadows subjected to anthropogenic disturbances

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Journal of Plant Ecology 2021年第5期14卷 870-883页

作者： Xiaoxia Huang Zhilu Sheng Kejian He Yong Zhang Bin Kang Jiao Ding Dongmei Liu Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region School of Earth SciencesYunnan UniversityKunming 650091Cliina State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Institute of Ecology ResearchChinese Research Academy of Environmental SciencesBeijing 100012China National Plateau Wetlands Research Center College of WetlandsSoutliwest Forestry UniversityKunming 650224China College of Fisheries Ocean University of ChinaQingdao 266003China Water Conservancy Department of Yunnan Province Kunming 650021China

Aims The aims of this study were to assess how functional diversity(FD)and functional redundancy respond to subalpine meadow ecosystem degradation under anthropogenic disturbance and how species contribute to functional redundancy along the disturbance *** The study was carried out in the subalpine meadow in Mount Jade Dragon,which is located at the southeastern edge of the Tibetan *** disturbance intensities[no disturbance(ND),weak disturbance(WD),moderate disturbance(MD)and severe disturbance(SD)]were *** richness,soil properties and five key plant functional traits were assessed along the disturbance ***’s diversity index,FD based on the Rao algorithm,functional redundancy,community-weighted mean of each functional trait and species-level functional redundancy were *** Findings Unimodal change pattern of FD and functional redundancy along the disturbance gradient were found in the present study,with their maximum in MD and WD,*** diversity showed a decreasing trend with increasing disturbance *** disturbance intensified,species with traits related to conservative growth strategies,such as low specific leaf area(SLA)and high leaf dry matter content(LDMC),decreased,whereas species with resource acquisitive strategies,such as small plant,high SLA and low LDMC,increased in the *** the species level,species showed species-specific roles in functional ***,some species were important in the community in terms of their unique *** instance,Ligularia dictyoneura in ND and Potentilla delavayi in MD and SD.

关键词： anthropogenic disturbance functional diversity functional redundancy functionally unique species subalpine meadow

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Effects of carbon-silicon structure on photochemical activity of biochars

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Chemosphere 2024年 347卷 140719页

作者： Guo, Siwei Lu, Lun Chen, Baoliang Department of Environmental Science Zhejiang University Hangzhou310058 China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou310058 China State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China

Biochar has raised increasing concerns because of its great environmental impacts. It is known that the photocatalytic property of biochar is related to its carbon component and dissolved black carbon, but the effect of silicon component is ignored, and the effect of silicon and carbon phases was far less studied. This study systematically explored the photochemistry of silicon-rich and silicon-deficient biochar under light irradiation by using hexavalent chromium (Cr(VI)) and sulfadiazine as representative pollutants for photoreduction and photooxidation, respectively. It was found that biochar had photoreduction activity under the enhancement of electron donors, and 80.1% Cr(VI) can be removed by biochar with crystalline silicon and carbon (i.e., RH900) after 12 h irradiation. Meanwhile after low temperature pyrolysis, biochar with amorphous silicon and carbon (i.e., RH600) had great photooxidation capacity, and 71.90% organic pollutant was degraded within 24 h. The reaction was illustrated by transient photocurrent response, and hydroxyl radical generation measurement, and other tests. A new photochemical mechanism of the synergy between silicon and carbon model was proposed to elucidate the redox reactions of pollutants under the light. Graphitic carbon or crystalline silicon formed under high temperature played a role of valence band which was excited under light irradiation and the effect of electron donors to benefit photoreduction, while amorphous silicon formed under low temperature facilitated photooxidation process by increasing reactive oxygen species concentration. This study provided a gist for biochar production and application in the field of photocatalysis, and contributed to the broader understanding of biochar geochemical behavior in natural sunlit system. © 2023 Elsevier Ltd

关键词： Photooxidation

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Père David’s Deer(Elaphurus davidianus)in China:Population Dynamics and Challenges

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Journal of Resources and Ecology 2022年第1期13卷 41-50页

作者： XUE Dayuan ZHANG Yuanyuan CHENG Zhibin ZHONG Zhenyu CAO Ming FU Mengdi BAI Jiade YUAN Xuejiao School of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China Beijing Milu Ecological Research Center Beijing 100076China Beijing Biodiversity Conservation Research Center Beijing 100076China Institute of Environmental Governance and Big Data Application Environmental Development Center of the Ministry of Ecology and EnvironmentBeijing 100029China Key Laboratory of Regional Eco-Process and Function Assessment and State Environment Protection Chinese Research Academy of Environmental SciencesBeijing 100012China

The reintroduction of rare and endangered species is one of the most important approaches to conservation and ecosystem restoration,but it has still proven to be an adventurous undertaking and most reintroduction programmes fail,so successful demonstrations are needed.Père David’s deer(Elaphurus davidianus,Milu in Chinese)could be considered one of conservation’s great success stories,as this species’path on the road to extinction has been reversed by a combination of ex-situ conservation and successful re-introduction in *** species had been consigned to an imperial hunting ground when the last Chinese herds were exterminated during the fall of the Qing Dynasty(1644-1912).Fortunately,a few of the last remaining individuals were sent to European *** these animals,a herd was bred on the 14;Duke of Bedford’s estate,Woburn Abbey,and between 1985and 1987,and 38 Milu were donated back to China for re-introduction in Beijing Milu Park(BMP),the former imperial hunting *** additional 39 deer were released at Dafeng National Nature Reserve(DFNNR),Jiangsu Province in *** both of these safe and protected locations,the Milu thrived allowing for over 700 Milu to be sent to a further 82 sites throughout the species’original Chinese range over the last 36 *** a result,the Milu population totaled 9136 by 2021,with 2855 individuals now living back in the wild;while another 5681 individuals inhabit the DFNNR,and 186 reside in *** Milu,however,still face significant conservation *** population lacks genetic diversity,leading to severe inbreeding depression and carrying multiple risks,such as high miscarriage rates,a reduced lifespan,and susceptibility to *** constraints such as pollution and habitat fragmentation further result in small,fragmented wild ***,the species currently lacks a national level conservation master plan,the associated coordinated monitoring platforms,and breeding plans for China’s capti

关键词： Elaphurus davidianus Milu reintroduction ex-situ conservation population dynamics

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Dynamics of Phosphorus Content in the Water-Sediment Interface of Wetlands in a Mid-Temperature Steppe

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Water environment Research 2024年 2019 Feb 10页

作者： He, Jing Su, Derong Lv, Shihai Diao, Zhaoyan Bu, He Zheng, Zhiron Ye, Shengxing State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Grassland Resources and Ecology Research Center Beijing Forestry University Beijing100083 China Huihe National Nature Reserve Authority in Inner Mongolia Hailar021199 China

In order to reveal dynamics changes in phosphorus release from the sediments of wetlands in a mid-temperature steppe without external phosphorus input, the relationship between phosphorus content in the overlying water, sediment, and interstitial water was studied using the variables control method. The results showed that, during the incubation period, the content of total phosphorus in the overlying water and the content of total phosphorus in interstitial water both presented in the order of August > September > July. Furthermore, the correlation relationships between phosphorus content in the overlying water, total phosphorus in the interstitial water, and the ratios of sediment Olsen-P to total phosphorus in the interstitial water, indicated that Olsen-P might be a kind of release form of phosphorus - from the sediment to the overlying water of the wetlands in Hulunbeier steppe, without external phosphorus input. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

关键词： Water content

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Enhanced Nutrient Cycling in Solar Park Induced by Soil Indicator Taxa, Microbial Biomass and Metabolic Efficiency Improve the Ecosystem Multifunctionality in Arid Region

SSRN

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SSRN 2023年

作者： Liu, Yu Ding, Chengxiang Wang, Tiemei Su, Derong Li, Zhuoqing Feng, Chaoyang Quan, Zhanjun Institute of Ecology Chinese Research Academy of Environmental Sciences Beijing100012 China State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Beijing100012 China State Key Laboratory of Environmental Criteria and Risk Assessment Beijing100012 China School of Grassland Beijing Forestry University Beijing100083 China Academy of Animal Science and Veterinary Medicine Qinghai University Xining810016 China

The drive towards clean energy sources has prompted the worldwide construction of emerging photovoltaic solar parks. The intense Despite the advantages of lower pollutant and greenhouse gas emissions, the construction of solar parks (SP) is not without environmental and ecological consequences due to changes in land use and impacts on regional climate. Previous studies have reported that SP construction impacts microclimate, plant biomass, biodiversity, soil physicochemical properties, and soil microbial community structure. However, our understanding of how SP influences a wide range of ecosystem functions simultaneously remains incomplete. To address this gap, we assessed the changes in ecosystem multifunctionality (EMF) in SP habitats in arid ecosystem, by measuring twenty-three indicators related to ecosystem functions comprising primary production, soil nutrient pool, carbon cycling, nitrogen cycling, phosphorus cycling and oxidation-reduction. Furthermore, we identified the primary driving factors and regulatory mechanism of EMF in different periods since SP installation. The results showed that SP had positive effects on EMF indices, the positive effect size was higher in initial installation period (5.4%-149.0%) than in constant running period (0.4%-15.3%). The enhancement in EMF were mainly due to the enhanced nutrient cycling induced by increased abundance of fungal indicator taxa (Indicator) as well as microbial biomass and metabolic efficiency (MBM) according to the results of variance decomposition analysis and multiple linear regression. Moreover, the structural equation model revealed distinct regulatory mechanism between the two period, and a transition in the primary driving factors of EMF from Indicator to MBM. Together, our study reveals the different effect size of SP on EMF and changes in driving factor and regulatory mechanism of EMF during the different periods following SP installation. These findings complement the environmental impact analy

关键词： Ecosystems

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Gasification Integrated with Small Chemical Pulp Mills for Fuel and Energy Production

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Energy Procedia 2017年 142卷 977-983页

作者： Muhammad Naqvi Erik Dahlquist Abdul-Sattar Nizami Muhammad Danish Salman Naqvi Usman Farooq Abdul Sattar Qureshi Mohammad Rehan Department of Energy Building and Environment Mälardalen University Sweden Center of Excellence in Environmental Studies King Abdulaziz University Saudi Arabia State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process ECUST China School of Chemical & Materials Engineering NUST Pakistan Institute of Biotechnology and Genetic Engineering University of Sindh Pakistan

Pulp mills without black liquor recovery cycle could play a major role in employing black liquor gasification (BLG) to produce transport fuels. In conventional chemical pulp mills, black liquor is burnt in recovery boilers to generate steam and electricity to meet energy demands. The inorganic chemicals are reused for the digestion process. However, the energy content and inorganic chemicals are not recovered in small scale pulp mills especially in the developing countries which do not employ recovery cycle. This study investigates the potential of synthetic natural gas (SNG) production by integrating BLG island with a reference pulp mill without chemical recovery cycle. The improvements in overall energy efficiency are evaluated using performance indicators such as biofuel production potential, integrated system’s efficiency, and energy ratios. The oxygen-blown circulating fluidized bed (CFB) gasification with direct causticization is integrated with reference pulp mill. The results showed considerable SNG production without external biomass import. However to compensate total electricity deficit, the electricity will be imported from the grid. There is a substantial CO 2 abatement potential of combining CO 2 capture using seloxol absorption, and CO 2 mitigation from SNG by replacing gasoline.

关键词： Pulp mill Polygeneration Gasification SNG Waste to energy

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Degradation of Bisphenol a Using Peroxymonosulfate Activated by Single-Atomic Cobalt Catalysts: Different Reactive Species at Acidic and Alkaline Ph

SSRN

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SSRN 2022年

作者： Wang, Qi Liu, Cun Zhou, Dongmei Chen, Xiurong Zhang, Meng Lin, Kuangfei State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resource and Environmental Engineering East China University of Science and Technology Shanghai200237 China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences No. 71 East Beijing Road Nanjing210008 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Peroxymonosulfate-assisted advanced oxidation processes (PMS-AOPs) catalyzed by single-atom catalysts have become state-of-the-art technologies for environmental remediation. In this study, Cobalt single-atom catalysts supported by graphitic carbon nitride (SA-CoCN) containing Co-N 4 active sites were developed as PMS activators for bisphenol A (BPA) degradation. BPA (10 mg L -1 ) was completely removed with 0.1 g L -1 SA-CoCN and 0.5 mM PMS, and this process was pH-dependent. Instead of the widely recognized generation of free radicals (SO 4 ·– and ‧OH), high-valent cobalt [Co(IV)] and singlet oxygen ( 1 O 2 ) were the predominant reactive species for pollutant degradation under acidic and alkaline conditions, respectively. The conversion of methyl phenyl sulfoxide (PMSO) to methyl phenyl sulfone (PMSO 2 ), electron paramagnetic resonance tests and radical scavenger experiments were used to probe these reactive species. According to density functional theory calculations, the formation of Co(IV) and 1 O 2 was thermodynamically favorable, and the generation pathways of Co(IV) and 1 O 2 were further discussed. This study provides an insight into the single-atom cobalt catalyst/PMS process. © 2022, The Authors. All rights reserved.

关键词： Density functional theory

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