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An empirical approach to predict regional organic carbon in deep soils

Science China Earth Sciences 2023年第3期66卷 583-593页

作者： Jingjing WANG Xiaorong WEI Xiaoxu JIA Mingbin HUANG Zhipeng LIU Yufei YAO Ming’an SHAO State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F UniversityYangling 712100China Institute of Soil and Water Conservation Ministry of Water Resources and Chinese Academy of SciencesYangling 712100China CAS Center for Excellence in Quaternary Science and Global Change Xi’an 710061China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China College of Urban and Environmental Sciences Northwest UniversityXi’an 710127China

Deep soil organic carbon(SOC)plays an important role in carbon *** predicting deep SOC at the regional scale is crucial for the accurate assessment of carbon sequestration potential in soils but has been challenging for a ***,we developed a depth distribution function-based empirical approach to predict SOC in deep soils at the regional *** validated this approach with a dataset from four regions of the world and examined the application of this approach in China’s Loess *** found that among the reported depth distribution functions describing vertical patterns of SOC,the negative exponential function performed best in fitting SOC along the soil profile in various ***,the parameters(i.e.,Ceand k)of the negative exponential function were linearly correlated to surface SOC(0–20 cm)and the changing rates of SOC within the topsoil(0–40 cm).Based on the above relationships,the empirical equations for predicting the negative exponential parameters are *** validation results from site-specific and regional dataset showed that combining the negative exponential function and such empirical equations can precisely predict SOC concentration in soils down to 500 cm *** study provides a simple,rapid and accurate method for predicting deep soil SOC at the regional scale,which could simplify the assessment of deep soil SOC in various regions.

关键词： Deep SOC Empirical approach Negative exponential function Depth distribution Spatial pattern

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Terrestrial carbon sinks in China and around the world and their contribution to carbon neutrality

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Science China(Life Sciences) 2022年第5期65卷 861-895页

作者： Yuanhe Yang Yue Shi Wenjuan Sun Jinfeng Chang Jianxiao Zhu Leiyi Chen Xin Wang Yanpei Guo Hongtu Zhang Lingfei Yu Shuqing Zhao Kang Xu Jiangling Zhu Haihua Shen Yuanyuan Wang Yunfeng Peng Xia Zhao Xiangping Wang Huifeng Hu Shiping Chen Mei Huang Xuefa Wen Shaopeng Wang Biao Zhu Shuli Niu Zhiyao Tang Lingli Liu Jingyun Fang State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China State Key Laboratory of Grassland Agro-ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730020China Institute of Ecology College of Urban and Environmental SciencesLaboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China School of Ecology and Nature Conservation Beijing Forest UniversityBeijing 100083China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Enhancing the terrestrial ecosystem carbon sink(referred to as terrestrial C sink) is an important way to slow down the continuous increase in atmospheric carbon dioxide(CO_(2)) concentration and to achieve carbon neutrality *** better understand the characteristics of terrestrial C sinks and their contribution to carbon neutrality,this review summarizes major progress in terrestrial C budget researches during the past decades,clarifies spatial patterns and drivers of terrestrial C sources and sinks in China and around the world,and examines the role of terrestrial C sinks in achieving carbon neutrality *** to recent studies,the global terrestrial C sink has been increasing from a source of (-0.2±0.9) Pg C yr^(-1)(1 Pg=1015g)in the 1960s to a sink of (1.9±1.1) Pg C yr^(-1) in the *** synthesizing the published data,we estimate terrestrial C sink of 0.20–0.25 Pg C yr^(-1) in China during the past decades,and predict it to be 0.15–0.52 Pg C yr^(-1) by *** terrestrial C sinks are mainly located in the mid-and high latitudes of the Northern Hemisphere,while tropical regions act as a weak C sink or *** C balance differs much among ecosystem types:forest is the major C sink;shrubland,wetland and farmland soil act as C sinks;and whether the grassland functions as C sink or source remains *** might be a C sink,but the magnitude and the associated mechanisms are still *** atmospheric CO_(2) concentration,nitrogen deposition,climate change,and land cover change are the main drivers of terrestrial C sinks,while other factors such as fires and aerosols would also affect ecosystem C *** driving factors of terrestrial C sink differ among *** CO_(2) concentration and climate change are major drivers of the C sinks in North America and Europe,while afforestation and ecological restoration are additionally important forcing factors of terrestrial C sinks in *** future studies,we recommend th

关键词： terrestrial ecosystem carbon sink carbon neutrality carbon cycle global warming

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Effects of conservation measures on crop diversity and their implications for climate-resilient livelihoods: the case of Rupa Lake Watershed in Nepal

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Journal of Mountain Science 2022年第4期19卷 945-957页

作者： BAI Yun-li FU Chao THAPA Balaram RANA Ram Bahadur ZHANG Lin-xiu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China United Nations Environment Programme-International Ecosystem Management Partnership(UNEP-IEMP) Beijing 100101China Local Initiatives for Biodiversity Research and Development(LI-BIRD)PO Box 324Pokhara 33700Nepal

Agrobiodiversity conservation is vital for achieving sustainability, but empirical studies on the effects of different practices or measures on crop diversity are rare. This study aims to estimate the effects of raising conservation awareness(RCA),building diversity blocks(BDB), and their combination on crop diversity among 240 randomly selected households surrounding the Rupa Lake Watershed in Nepal. Based on descriptive analysis and multiple regression models, the results indicate that the two single measures had no significant effect on the numbers of crop species and varieties grown by households in 2018. However, the combination of RCA and BDB had a significantly positive effect on the number of crop varieties, especially for grain and vegetable crops. Considering that these crops are essential in the daily lives of local people, the results indicate that a strategy that combines both awareness raising and on-farm conservation measures can generate higher crop diversity and better serve the climate-resilient livelihoods of people in mountainous areas.

关键词： Agrobiodiversity Conservation measures Crop species and varieties Rupa Lake

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Linking leaf elemental traits to biomass across forest biomes in the Himalayas

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Science China Earth Sciences 2024年第5期67卷 1518-1528页

作者： Nita DYOLA Eryuan LIANG Josep PEÑUELAS J.Julio CAMARERO Shalik Ram SIGDEL Sugam ARYAL Wentao LIN Xiang LIU Yongwen LIU Xingliang XU Sergio ROSSI State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Laboratoire sur lesécosystèmes terrestres boréaux Département des Sciences FondamentalesUniversitédu QuébecàChicoutimi555Boulevard de l′UniversitéChicoutimi(QC)G7H2B1Canada CSIC Global Ecology Unit CREAF-CSIC-UABBellaterraE-08193 CataloniaSpain CREAF Cerdanyola del VallèsE-08193 CataloniaSpain Instituto Pirenaico de Ecología(IPE-CSIC) Avenida Montañana 1005Zaragoza 50059Spain Friedrich-Alexander-Universität Erlangen-Nürnberg Institut für GeographieErlangen 91058Germany State Key Laboratory of Grassland Agro-Ecosystems College of EcologyLanzhou UniversityLanzhou 730000China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Plants require a number of essential elements in different proportions for ensuring their growth and *** elemental concentrations in leaves reflect the functions and adaptations of plants under specific environmental ***,less is known about how the spectrum of leaf elements associated with resource acquisition,photosynthesis and growth regulates forest biomass along broad elevational *** examined the influence of leaf element distribution and diversity on forest biomass by analyzing ten elements(C,N,P,K,Ca,Mg,Zn,Fe,Cu,and Mn)in tree communities situated every 100 meters along an extensive elevation gradient,ranging from the tropical forest(80 meters above sea level)to the alpine treeline(4200 meters above sea level)in the Kangchenjunga Landscape in eastern Nepal *** calculated communityweighted averages(reflecting dominant traits governing biomass,i.e.,mass-ratio effect)and functional divergence(reflecting increased trait variety,i.e.,complementarity effect)for leaf elements in a total of 1,859 trees representing 116 *** increasing mass-ratio effect and decreasing complementarity in leaf elements enhance forest biomass accumulation.A combination of elements together with elevation explains biomass(52.2%of the variance)better than individual elemental trait diversity(0.05%to 21%of the variance).Elevation modulates trait diversity among plant species in biomass *** promotes biomass at lower elevations,but reduces biomass at higher elevations,demonstrating an interaction between elevation and *** interaction between elevation and mass-ratio effect produces heterogeneous effects on biomass along the elevation *** research indicates that biomass accumulation can be disproportionately affected by elevation due to interactions among trait diversities across vegetation *** higher trait variation enhances the adaptation of species to environmental changes,it reduces

关键词： Ecosystem function Elevational gradient Functional diversity Functional traits Leaf elements Niche complementarity

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The interactive effects of nitrogen addition and increased precipitation on gross ecosystem productivity in an alpine meadow

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Journal of Plant Ecology 2022年第1期15卷 168-179页

作者： Ruo-Nan Shen Yang-Jian Zhang Jun-Tao Zhu Ning Chen Yao Chen Guang Zhao Yi-Xuan Zhu Ze Tang Wen-Yu Li Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Lhasa Plateau Ecosystem Research Station Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China

The ecological consequences of precipitation change and increased atmospheric nitrogen(N)deposition have profound impacts on ecosystem CO2 exchange in grassland *** and N can largely influence grassland productivity,community composition and ecosystem ***,the influences of water and N addition on the ecosystem CO2 exchange of alpine grassland ecosystems remain unclear.A field manipulative experiment with water and N additions was conducted in an alpine meadow on the Tibetan Plateau over 4 years with contrasting precipitation *** were four treatments:control(Ctrl),N addition(N),water addition(W)and N and water addition(NW),each replicated three times.N addition,but not water addition,increased gross ecosystem productivity(GEP),plant biomass,community cover and community-weighted mean *** responses of ecosystem CO2 exchange to water and N addition varied between the wet and dry *** addition had a positive effect on net ecosystem carbon exchange(NEE)due to a larger increase in GEP than in ecosystem respiration(ER)only in the dry *** the contrary,N addition significantly enhanced ecosystem CO2 exchange only in the wet *** increased GEP in N addition was attributed to the larger increase in NEE than ***,N addition stimulated NEE mainly through increasing the cover of dominant *** observations highlight the important roles of precipitation and dominant species in regulating ecosystem CO2 exchange response to global environmental change in alpine grasslands.

关键词： ecosystem CO2 exchange water addition nitrogen addition plant functional groups alpine grassland

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Variation and adaptation in leaf sulfur content across China

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Journal of Plant Ecology 2022年第4期15卷 743-755页

作者： Wenzong Zhao Chunwang Xiao Mingxu Li Li Xu Nianpeng He College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China 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 10049China Center for Ecological Research Northeast Forestry UniversityHarbin 150040China

Sulfur is an essential functional element in leaves,and it plays important roles in regulating plant growth,development and abiotic stress resistance in natural ***,there has been limited information on the spatial variation in leaf sulfur content(LSC)and adaptive characters on a large community *** in leaves of 2207 plant species from 80 widespread ecosystems(31 forests,38 grasslands and 11 deserts)in China was ***-way analysis of variance with Duncan’s multiple-range tests were used to evaluate the differences in LSC among different plant growth forms and *** fitted the relationships of LSC to spatial and climate factors using *** equation modeling analysis and phylogenetic analysis helped us further explore the main factors of LSC *** ranged from 0.15 to 48.64 g·kg^(-1),with an average of 2.13±0.04 g·kg^(-1) at the community scale in *** observed significant spatial variation in LSC among different ecosystems and ***,LSC was higher in arid areas and ***,higher LSC was observed under environments of drought,low temperatures and intense ultraviolet ***,precipitation,radiation,soil sulfur content and aridity jointly regulated LSC,explaining 79%of the spatial ***,LSC was not significantly related to *** results demonstrate that LSC plays an important role in plant adaptations to extreme environments and further extend our understanding of the biological function of sulfur from the organ to the community *** findings highlight the importance of sulfur metabolism for our understanding of the impact of global climate change on plants.

关键词： functional trait functional element leaf sulfur content plant growth forms spatial variation China

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The Impacts of Climate Change and Human Activities on Cropland Net Primary Productivity in Bangladesh,India and Myanmar

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Journal of Resources and Ecology 2024年第4期15卷 814-825页

作者： WANG Chunyu WANG Junbang School of Geography and Tourism Qilu Normal UniversityJinan 250200China National Ecosystem Science Data Center Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Under global change and climate variations,determining the impacts of climate change and human activities on cropland net primary productivity(NPP)in Bangladesh,India and Myanmar(BIM)is of great significance for identifying yield-limiting factors,making adaptive agricultural management plans,and improving *** on the GLOPEM-CEVSA model,through an integration of remote sensing data and LAI simulation,we investigated the impacts and spatiotemporal changes of water and human activities on BIM from 1982 to *** types of cropland NPPs were considered:actual NPP(NPPA),NPP affected by temperature and water(NPPWT),and NPP only affected by temperature(NPPT).Our analysis revealed that the water factor plays a predominant role in determining the NPP level in the *** variability was found to be conducive to NPPT,exhibiting an increasing trend of 10.66 g C m^(-2) yr^(-1).However,this trend was partially offset by precipitation variability,resulting in a net increase of 0.96 g C m^(-2) yr^(-1).In comparing temperature-driven NPP to temperature and water-driven NPP,water stress caused NPPT to decrease by 65.46% compared to NPPWT for the entire *** NPP in northwestern India and the central Deccan Plateau were significantly affected by water ***,the influence of water on NPP in the BIM exhibited a substantial upward trend from 1982 to 2015,with Myanmar experiencing the most significant *** gap between NPPWT and NPPA in BIM demonstrated a notable decreasing trend during the same period,underscoring the positive impact of human activities on *** drawn from our findings suggest that with the implementation of rational and efficient crop management practices,there is a 36.80% potential improvement in NPPA compared to NPPWT in the BIM region,with India and Myanmar showing potential increases of 39.20% and 38.29%,*** insights provide guidance for practical measures aimed at water resource management to en

关键词： NPP climate change human activities water stress GLOPEM-CEVSA model Bangladesh India Myanmar

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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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Consumers’experiences and preferences for plant-based meat food:Evidence from a choice experiment in four cities of China

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Journal of Integrative Agriculture 2023年第1期22卷 306-319页

作者： WANG Ge Madison T PLASTER Bai Yun-li LIU Cheng-fang China Center for Agricultural Policy School of Advanced Agricultural SciencesPeking UniversityBeijing 100871P.R.China Yenching Academy Peking UniversityBeijing 100871P.R.China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101R.P.China United Nations Environment Programme–International Ecosystem Management Partnership Beijing 100101R.P.China

This paper examined consumers’experiences in and preferences for plant-based meat(PBM)food and their respective correlates,based on data from an online survey of 579 consumers in four major cities in China in early *** first described consumers’experiences in consuming and purchasing PBM food and their correlates,and then analyzed consumer preferences using hypothetical choice *** experiment offered consumers various options to purchase burgers made from PBM or animal-based meat(ABM),combined with different countries of origin(COO),taste labels,and *** data showed that respondents hold overall positive attitudes toward PBM food;85 and 82%of respondents reported experience in eating and purchasing PBM food,*** than half of them ate PBM food because they wanted to try new food(58%),or were interested in healthy food(56%).Income,religion,and dietary restrictions were significantly correlated with consumers’experiences in PBM food *** from the Random Parameter Logit Model based on the hypothetical choice experiment data showed that 79%of respondents chose PBM burgers and were willing to pay an average of 88 CNY for a PBM *** also found that 99.8 and 83%of respondents are willing to buy burgers made in China and those with a taste label,with a willingness to pay(WTP)of 208 and 120 CNY,*** heterogeneity test revealed that females and those with at least a bachelor’s degree,higher income,religious beliefs,and dietary restrictions are more likely to buy PBM burgers than their counterparts.

关键词： plant-based meat(PBM) choice experiment consumers’preference willingness to pay

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Effect of Functional Microorganisms and Environmental Factors on Co2 and Ch4 Emissions in a Typical Floodplain Lake System

SSRN

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SSRN 2024年

作者： Wu, Fan Gao, Yang Li, Jiajia Ha, Xianrui Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China University of Chinese Academy of Sciences Beijing100049 China

Lakes are known as potential carbon dioxide (CO2) and methane (CH4) emission hotspots, whose associated flux is spatially variable. However, the microbial processes and the environmental controls that influence CO2 and CH4 emission heterogeneity remain poorly understood. Accordingly, this study investigates CO2 and CH4 emission heterogeneity in a large floodplain lake system and distribution characteristics of associated functional microorganisms. Findings show that mean CO2 and CH4 flux values in the sub lake area were 62.03 ± 24.21 mg m-2 d-1 and 5.97 ± 3.2 μg m-2 d-1, which were greater by factors of 1.78 and 2.96 compared to the water channel and the main lake area, respectively. The Shannon index of methanogens in the sub lake area was lower than that in the main lake and water channel *** abundance of methanogens in bottom water layer was higher compared with the middle and surface layers. Conversely, the abundance of methane (CH4)-oxidizing bacteria in the surface layer was higher than that in the bottom layer. Additionally, the composition of methanogen and CH4-oxidizing bacterial community, chlorophyll a (Chl-a), pH, total phosphorus (TP) and dissolved organic carbon (DOC) content constituted the dominate driving factors affecting lake carbon (C) emissions. Results from this study can be used to improve our understanding of lake CO2 and CH4 emission driving mechanisms in floodplain lakes under the coupling effects of functional C microorganisms and environmental factors. © 2024, The Authors. All rights reserved.

关键词： Lakes

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