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Simulation and analysis of the long-term impacts of 1.5°C global climate pledges on China's land systems

Science China earth Sciences 2025年

作者： Jiaying LV Changqing SONG Yifan GAO Sijing YE Peichao GAO state key laboratory of earth Surface processes and resource ecology Beijing Normal University Center for GeoData and Analysis Beijing Normal University

Global warming has become a shared issue for humanity. At the 26th Conference of the Parties to the United Nations Framework Convention on Climate Change in 2021, participating countries reached climate pledges aimed at making more proactive contributions to limit the global average temperature rise within 1.5°C by 2100. Land system changes are significant responses of land to climate change. As one of the contracting parties, China has proposed climate targets such as carbon peaking and carbon neutrality goals in recent years to support the global pledges of limiting global warming to1.5°C, which will profoundly impact China's future land system changes. This study focuses on China as the study area,produces data with a thematic resolution of 27 types of land systems, integrates the output of various land types by the Global Change Assessment Model(GCAM) into four categories of land service demand, and combines these with the improved CLUMondo model to simulate China's land system changes in 2100 under a 1.5°C global warming scenario and a reference scenario without updated emission reduction measures. The conclusions of this study are as follows:(1) The method of integrating the GCAM and improved CLUMondo model demonstrates high validation accuracy in simulating China's land system changes, effectively predicting the changes.(2) Under the 1.5°C global warming scenario, the quality of ecosystems related to mountains, water, forests, farmland, lakes, and grasslands in China improved. The areas of shrubland, wetland, and forest are projected to increase by 185%, 79%, and 33%, respectively, with low-density shrubland, high-density wetland, and high-density forest showing the most significant increases.(3) Compared with the reference scenario, the 1.5°C climate pledges drive greater changes in future land systems, with wetland and forest area growth levels exceeding those of the reference scenario by 20% and 10%, respectively. Notably, the changes in cropland, grasslan

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Effects of bamboo invasion on forest structures and diameter–height allometries

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Forest Ecosystems 2025年第1期12卷 38-45页

作者： Ming Ouyang Anwar Eziz Shuli Xiao Wenjing Fang Qiong Cai Suhui Ma Jiangling Zhu Qingpei Yang Jinming Hu Zhiyao Tang Jingyun Fang School of ecology and Environmental Science and Ministry of Education Key Laboratory for Transboundary Ecosecurity of SouthwestYunnan UniversityKunmingChina Institute of ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijingChina state key laboratory of Desert and Oasis ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqiChina Jiangxi Provincial key laboratory for Bamboo Germplasm resources and Utilization and College of ForestryJiangxi Agricultural UniversityNanchangChina

Forest structure is fundamental in determining ecosystem function,yet the impact of bamboo invasion on these structural characteristics remains *** investigated 219 invasion transects at 41 sites across the distribution areas of Moso bamboo(Phyllostachys edulis)in China to explore the effects of bamboo invasion on forest structural attributes and diameter–height allometries by comparing paired plots of bamboo,mixed bamboo-tree,and non-bamboo forests along the *** found that bamboo invasion decreased the mean and maximum diameter at breast height,maximum height,and total basal area,but increased the mean height,stem density,and scaling exponent for *** also had a higher scaling exponent than tree,particularly in mixed forests,suggesting a greater allocation of biomass to height *** invasion intensity increased,bamboo allometry became more plastic and decreased significantly,whereas tree allometry was indirectly promoted by increasing stem ***,a humid climate may favour the scaling exponents for both bamboo and tree,with only minor contributions from topsoil moisture and nitrogen *** inherent superiority of diameter–height allometry allows bamboo to outcompete tree and contributes to its invasive *** findings provide a theoretical basis for understanding the causes and consequences of bamboo invasion.

关键词： Moso bamboo Forest structure Stand density DBHHeight allometry Scaling exponent Wetness index

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Simulation and analysis of the long-term impacts of 1.5℃ global climate pledges on China's land systems

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Science China earth Sciences 2025年第2期68卷 457-472页

作者： Jiaying LV Changqing SONG Yifan GAO Sijing YE Peichao GAO state key laboratory of earth Surface processes and resource ecology Beijing Normal UniversityBeijing 100875China Center for GeoData and Analysis Beijing Normal UniversityBeijing 100875China

Global warming has become a shared issue for *** the 26th Conference of the Parties to the United Nations Framework Convention on Climate Change in 2021,participating countries reached climate pledges aimed at making more proactive contributions to limit the global average temperature rise within 1.5℃by *** system changes are significant responses of land to climate *** one of the contracting parties,China has proposed climate targets such as carbon peaking and carbon neutrality goals in recent years to support the global pledges of limiting global warming to 1.5℃,which will profoundly impact China's future land system *** study focuses on China as the study area,produces data with a thematic resolution of 27 types of land systems,integrates the output of various land types by the Global Change Assessment Model(GCAM)into four categories of land service demand,and combines these with the improved CLUMondo model to simulate China's land system changes in 2100 under a 1.5℃global warming scenario and a reference scenario without updated emission reduction *** conclusions of this study are as follows:(1)The method of integrating the GCAM and improved CLUMondo model demonstrates high validation accuracy in simulating China's land system changes,effectively predicting the changes.(2)Under the 1.5℃global warming scenario,the quality of ecosystems related to mountains,water,forests,farmland,lakes,and grasslands in China *** areas of shrubland,wetland,and forest are projected to increase by 185%,79%,and 33%,respectively,with low-density shrubland,high-density wetland,and high-density forest showing the most significant increases.(3)Compared with the reference scenario,the 1.5℃climate pledges drive greater changes in future land systems,with wetland and forest area growth levels exceeding those of the reference scenario by 20%and 10%,***,the changes in cropland,grassland,and wetland areas are more pronounced in so

关键词： 1.5℃global warming China Land system changes Simulation Scenario analysis

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Nitrogen addition promotes soil carbon accumulation globally

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Science China(Life Sciences) 2025年第1期68卷 284-293页

作者： Xuemei Yang Suhui Ma Erhan Huang Danhua Zhang Guoping Chen Jiangling Zhu Chengjun Ji Biao Zhu Lingli Liu Jingyun Fang Institute of ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China Ministry of Education key laboratory for Transboundary Ecosecurity of Southwest China School of Ecology and Environmental ScienceYunnan UniversityKunming 650500China state key laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China

Soil is the largest carbon(C)reservoir in terrestrial ecosystems and plays a crucial role in regulating the global C cycle and climate *** nitrogen(N)deposition has been widely considered as a critical factor affecting soil organic carbon(SOC)storage,but its effect on SOC components with different stability remains ***,we analyzed extensive empirical data from 304 sites worldwide to investigate how SOC and its components respond to N *** analysis showed that N addition led to a significant increase in bulk SOC(6.7%),with greater increases in croplands(10.6%)and forests(6.0%)compared to grasslands(2.1%).Regarding SOC components,N addition promoted the accumulation of plant-derived C(9.7%–28.5%)over microbial-derived C(0.2%),as well as labile(5.7%)over recalcitrant components(–1.2%),resulting in a shift towards increased accumulation of plant-derived labile ***,N addition led to a greater increase in particulate organic C(11.9%)than mineral-associated organic C(3.6%),suggesting that N addition promotes C accumulation across all pools,with more increase in unstable than stable *** responses of SOC and its components were best predicted by the N addition rate and net primary ***,our findings suggest that N enrichment could promote the accumulation of plant-derived and non-mineral associated C and a subsequent decrease in the overall stability of soil C pool,which underscores the importance of considering the effects of N enrichment on SOC components for a better understanding of C dynamics in soils.

关键词： meta-analysis nitrogen enrichment soil organic carbon carbon accumulation carbon stability

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Future soil moisture will slowdown the advancement of ecosystem productivity in the Northern Hemisphere

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Science Bulletin 2025年第3期70卷 347-350页

作者： Zhi Li Yongchang Liu Yaning Chen Lei Gao Wenping Yuan Brett A.Bryan Bin He Weili Duan Gonghuan Fang Yupeng Li Xueqi Zhang state key laboratory of Desert and Oasis ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of the Chinese Academy of Sciences Beijing 100049China Commonwealth Scientific and Industrial Research Organisation(CSIRO) UrrbraeSA 5064Australia School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 510245China Centre for Integrative ecology School of Life and Environmental SciencesDeakin UniversityBurwoodVIC 3125Australia state key laboratory of earth Surface processes and resource ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Gross primary productivity(GPP)is a crucial metric when quantifying the amount of CO_(2)sequestered by plants during *** large terrestrial carbon sink in the Northern Hemisphere is primarily attributed to elevated GPP... 详细信息

关键词： soil moisture attributed

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Human activities are intensifying the spatial variation of landslides in the Yellow River Basin

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Science Bulletin 2025年第2期70卷 263-272页

作者： Naiman Tian Hengxing Lan Langping Li Jianbing Peng Bojie Fu John J.Clague state key laboratory of resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China University of Chinese Academy of Sciences Beijing 100049China key laboratory of Ecological Geology and Disaster Prevention Ministry of Natural ResourcesXi’an 710054China state key laboratory of Urban and Regional ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China state key laboratory of earth Surface processes and resource ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Department of earth Sciences Simon Fraser UniversityBurnaby BCV5A 1S6Canada

Human activities are a triggering factor for landslides in the Yellow River Basin(YRB,China).However,the extent to which the spatial distribution of landslides is affected by human activities is *** constructed a human activity intensity index(HAII)based on nighttime light data and land cover *** and dominance analyses were used to compare the effects of the HAII,precipitation,distance to river,distance to fault,topographic relief and slope on the landslides spatial density(LSD).The results showed that in the YRB,the HAII,as a dominance influencing factor,had a significant positive influence on the ***,regional differences in the human disturbance of nature intensify the spatial variation of *** quantify the intensity of human disturbance to nature,a human-nature conflict index(HNCI)is constructed by quantifying the difference between the slope distributions of artificial and natural *** results show that in the middle section of the YRB,humans are developing more steep mountainous areas,leading to more dense *** study provides a reference for landslide risk management and land use planning in the YRB.

关键词： Landslide Human activities Spatial variation Human-nature conflict Yellow River Basin

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Vegetation mapping of Yunnan Province by integrating remote sensing, field observations, and models

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Science China earth Sciences 2025年第3期68卷 836-849页

作者： Mingjian XIAHOU Mingchun PENG Zehao SHEN Qingzhong WEN Chongyun WANG Yannan LIU Qiuyuan ZHANG Lei PENG Changyuan YU Xiaokun OU Jingyun FANG key laboratory of Ministry of Education for earth Surface processes College of Urban & Environmental SciencesPeking University School of ecology and Environment Yunnan University Yunnan Institute of Forest Inventory and Planning

Vegetation maps are crucial for ecologists and decision-makers, providing essential information on the spatial distribution of various vegetation types to support ecosystem exploration and management. Despite advancements in earth observation and machine learning enabling large-scale vegetation mapping, creating detailed and accurate maps in biodiversity hotspots remains challenging due to significant environmental heterogeneity and frequent human disturbances. The lack of sufficient ground-based data and complex climate-vegetation interactions further limits mapping accuracy. In this study, we developed an integrated framework for multi-source data fusion to enhance vegetation mapping and validation in Yunnan Province, a global biodiversity hotspot region in Southwest China. The mapping process involved four key steps:(1) vegetation classification using random forest and Landsat imagery,(2) boundary calibration based on a locally calibrated static climatevegetation model,(3) patch correction with independent forest inventory data, and(4) validation using adequate field observations. This approach enabled the mapping of 17 vegetation types and 44 subtypes in Yunnan Province(1:50000), categorized based on the growth-form composition of dominant species of the community. The overall accuracies were 0.747 and0.710 for natural vegetation types and subtypes, and 0.905 and 0.891 for artificial types and subtypes. This high-resolution map enhances our understanding of vegetation distribution and ecological complexity in this region, offering valuable insights for policymakers to support conservation efforts and sustainable management strategies.

关键词： Vegetation mapping Biodiversity hotspot region Multi-source data Data-fusion framework Ecological diversity

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New Potential Barite Reference Materials for LA-MC-ICP-MS Sulfur Isotope Analysis with Application to Hydrothermal Barite in the Huayangchuan Deposit,Western China

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Journal of earth Science 2025年第1期36卷 1-10页

作者： Jiali Fu Xinqian He Zhaochu Hu Shuo Yin Jian Ma Kaiyun Chen Wen Zhang National key laboratory of Uranium resource Exploration-Mining andNuclear Remote Sensing East China UniversityofTechnologyNanchang 330013China state key laboratory of Nuclear resources and Environment East China University of TechnologyNanchang 330013China School of earth Sciences East China University of TechnologyNanchang 330013China state key laboratory of Geological processes and Mineral resources China University of GeosciencesWuhan 430078China state key laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China

Sulfur isotopes of S-bearing materials are powerful tools to trace various geological processes and sulfur sources in earth sciences,especially in ore deposits where sulfide-sulfate pair coprecipitates ***,in-situ S isotope determination of barite is challenging without natural matrix-matched reference *** this study,we present two natural barite reference materials(1-YS and 294-YS)for in-situ sulfur isotopic *** LA-MC-ICP-MS laboratories were utilized to test theδ34S micron-scale homogeneity of 1-YS and 294-YS barites that have 2s repeatabilities of better than±0.45‰and±0.41‰,***,the in-situ analysis results are consistent with the results of the bulk analysis by GS-IRMS within *** grand meanδ~(34)S values of 1-YS(13.37‰±0.42‰,2s)and 294-YS(14.38‰±0.44‰,2s)are the final recommended values obtained from four independent *** the results confirm the suitability of 1-YS and 294-YS barite used as calibration materials with respect to in-situ S isotopic ***,the new developed barite reference materials were used as matrix-matched standard to calibrate the barite samples from the Huayangchuan carbonatite-hosted U-polymetallic deposit(Qinling orogenic belt,western China)to obtainδ34S *** the temperaturedependentδ34S fractionation of barite-pyrite pair,we calculate the formation temperature of barite(i.e.,506 to 537°C)and theδ34S value of mineralizing fluid(i.e.,-7.11‰to-7.59‰)in the Huayangchuan *** results indicate an involvement of sedimentary sulfur,presumably acting as a potential uranium source(e.g.,upper crustal materials)for the giant Huayangchuan deposit.

关键词： LA-MC-ICP-MS S isotope reference material barite geothermometry

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Reconstructing fossil insect communities and palaeoclimates for the Middle Jurassic Yanliao Biota in the Daohugou area of China

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Science Bulletin 2025年第2期70卷 176-179页

作者： Liang Chen Lifang Xiao Shilong Guo Nan Yang Conrad C.Labandeira Chungkun Shih Chaofan Shi Dong Ren College of Life Sciences Capital Normal UniversityBeijing 100048China Guangdong key laboratory of Animal Conservation and resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou 510260China Department of Paleobiology National Museum of Natural HistorySmithsonian InstitutionWashingtonDC 20013USA Department of Entomology University of MarylandCollege ParkMD 20742USA School of earth Sciences and Engineering Guangdong Provincial Key Lab of Geological Processes and Mineral ResourcesSun Yat-sen UniversityGuangzhou 510275China

Palaeoecological research is essential to understanding the interaction between organisms and their environment during the evolutionary ***,the study of fossil insect communities is challenging because of a limited fossil record and the unavailability of data,which makes it difficult to assess the associations of insects with their environment,especially the role of local climate.

关键词： Jurassic Middle process.

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Spatial and Temporal Distribution of Metal Elements in the Rivers of Northern Jiangsu Province

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Journal of Ocean University of China 2025年第1期24卷 157-168页

作者： YUAN Liping LIU Qian JIAN Huimin MI Tiezhu YANG Fuxia YAO Qingzhen Frontiers Science Center for Deep Ocean Multispheres and earth System and Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China laboratory of Marine ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China key laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of ecology and Environment Shandong Academy for Environmental PlanningJinan 250101China

The concentrations of V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Mo,Cd,and Pb were determined in Doulonggang River,Xinyanggang River,Huangshagang River,Sheyanghe River,Guangaizongqu River,and Linhonghe River at the North of Jiangsu Province in *** annual average concentrations of V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Mo,Cd and Pb in the six rivers were 2.20,1.22,4.53,21.9,0.13,2.79,1.77,4.00,2.97,3.87,0.01,0.19μg L^(-1)*** highest concentration of most trace metals were found in Guangaizongqu River and Linhonghe River,and the lowest concentration were found in Xinyanggang River and Huangshagang *** principal component analysis(PCA)resulted of two factors together explained 91.2%of the variance with>1initial eigenvalue,indicating that both natural and anthropogenic activities were contributing factors as the source of metal abundance in rivers of northern Jiangsu *** first major component represented the influence of anthropogenic activities,including industry and agriculture,with a contribution rate of 54.1%,affected Cr,Fe,Cu,Zn,Mo,Cd and *** second(such as V,Mn,Co,Ni,As)was a mixed source,including the natural processes such as precipitation,erosion and weathering and anthropogenic action like industry and agriculture,with a contribution rate of 37.1%.Seasonal variations in trace metal concentrations were influenced by temperature,salinity,water discharge,and input of external *** highest concentrations were found in wet season and were strongly influenced by rainfall and seasonal industrial and agricultural activities.

关键词： trace metal distribution rivers northern Jiangsu Province

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