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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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青藏高原东北部湖泊浮游植物对气候振荡的响应:来自1400年沉积物岩芯的证据

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Science Bulletin 2024年第9期69卷 1208-1211页

作者：张含笑郑佳楠王荣刘永高扬吴丰昌霍守亮 State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Key Laboratory of Water and Sediment Science Ministry of EducationCollege of Environmental Science and EngineeringPeking UniversityBeijing 100871China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

The Tibetan Plateau, also known as the Water Tower of Asia, is home to 1424 lakes with areas of greater than 1 km2, and supplies freshwater resources for more than 1.4 billion people [1,2]. In the context of recent global change, the warmer climate has caused prominent changes in the characteristics of the lake evolution on the Tibetan Plateau, such as changes in the hydrology.

关键词： Tibetan Plateau 青藏高原东北部

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Different responses of soil respiration and its components to nitrogen and phosphorus addition in a subtropical secondary forest

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Forest ecosystems 2021年第3期8卷 491-503页

作者： Junjun Zhang Yong Li Jinsong Wang Weinan Chen Dashuan Tian Shuli Niu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Beijing Key Laboratory of Wetland Services and Restoration Institute of Wetland ResearchChinese Academy of ForestryBeijing 100091China Department of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Background:Nitrogen(N)and phosphorus(P)deposition have largely affected soil respiration(Rs)in forest ***,few studies have explored how N and P individually or in combination to influence Rs and its components(autotrophic respiration,Ra;heterotrophic respiration,Rh),especially in highly P-limited subtropical *** address this question,we conducted a field manipulation experiment with N and/or P addition in a 50-year-old subtropical secondary ***:We found that N addition on average reduced Rs,Ra,and Rh by 15.2%,15%,and 11.7%,respectively during 2-year field study.P addition had an inconsistent effect on Ra,with Ra increasing by 50.5%in the first year but reducing by 26.6%in the second ***,P addition on average decreased Rh by 8.9%–30.9%and Rs by 6.7%–15.6%across 2 *** contrast,N and P co-addition on average increased Rs,Ra,and Rh by 1.9%,7.9%,and 2.1%during the experimental *** Rs and Rh were significantly correlated with soil temperature,their temperature sensitivities were not significantly changed by *** was predominantly regulated by soil nitrogen availability(NH4+and NO3−),soil dissolved organic carbon(DOC),and enzyme activities,while the variation in Rh was mainly attributable to changes in soil microbial community composition and soilβ-D-Cellubiosidase(CB)andβ-Xylosidase(XYL)***:Our findings highlight the contrasting responses of Rs and its components to N or P addition against N and P co-addition,which should be differentially considered in biogeochemical models in order to improve prediction of forest carbon dynamics in the context of N and P enrichment in terrestrial ecosystems.

关键词： Nitrogen deposition Phosphorus enrichment Heterotrophic respiration Autotrophic respiration Enzyme activities Microbial community composition

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Biogeographical patterns of arbuscular mycorrhizal fungi diversity in China’s grasslands

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Journal of Geographical Sciences 2021年第7期31卷 965-976页

作者： TENG Jialing TIAN Jing YU Guirui Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China College of Resources and Environmental Sciences Key Laboratory of Plant-Soil InteractionsMinistry of EducationChina Agricultural UniversityBeijing 100193China

Arbuscular mycorrhizal fungi(AMF)are universally mutualistic symbionts that colonize the fine roots of most vascular ***,the biogeographical patterns and driving factors of AMF diversity of plant roots in grasslands are not well *** this study,we used high-throughput sequencing techniques and bioinformatics to evaluate the AMF richness of 333 individual plant roots in 21 natural grassland ecosystems in northern China,including the Loess Plateau(LP),the Mongolian Plateau(MP),and the Tibetan Plateau(TP).The AMF richness showed a significant parabolic trend with increasing *** regional situations,the AMF richness in the grasslands of the MP(60.4±1.47)was significantly higher than those of the LP(46.4±1.43)and TP(44.3±1.64).Plant traits(including plant families,genera,and functional groups)explained the most variation in the AMF richness across China's grasslands,followed by energy and water;soil properties had the least *** results showed the biogeographical patterns of the AMF richness and the underlying dominant factors,providing synthetic data compilation and analyses in the AMF diversity in China's grasslands.

关键词： arbuscular mycorrhizal fungi biogeography grassland ecosystems northern China

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Spatial characteristics of the stability of mangrove ecosystems in freshwater and seawater floods in Southeast Asia

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Journal of Geographical Sciences 2022年第9期32卷 1831-1846页

作者： LI Xia LIU Zhenhai WANG Shaoqiang LI Fengting LI Hui ZHU Tongtong QIAN Zhaohui TU Yongkai LIU Yuanyuan WANG Xiaobo WANG Qinyi SHI Weibo LI Donghui College of Environmental Science and Engineering Tongji UniversityShanghai200092China Foreign Environmental Cooperation Center Ministry of Ecology and EnvironmentBeijing100035China Key Laboratory of Regional Ecology and Environmental Change School of Geography and Information EngineeringChina University of GeosciencesWuhan430074China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan430074China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China

In tropical regions,mangrove forests are located in the inter-tidal areas between land and sea,and are at risk from both freshwater and seawater *** satellite-derived Normalized Difference Vegetation Index(NDVI)products,this study compared the differences in resistance and resilience of mangrove ecosystems to freshwater and seawater floods in Southeast Asia,and analyzed the spatial characteristics of the stability of mangrove ecosystems under floods in representative *** show that mangroves tended to have lower mean resistance(28.24 vs.37.32)and higher mean resilience(3.74 vs.3.56)under freshwater floods,compared to seawater *** resistance increased with the distance from rivers,such that the resistance of coastal areas to freshwater and seawater floods was lower than that of inland *** areas with lower resistance showed higher resilience compared to those with higher *** mangroves hardly fully recovered to their normal NDVI levels one year after seawater floods,especially in coastal *** the occurrence of seawater floods was relatively rare in the past,it is likely to increase under more-intense climate extremes in the future,and the threat to the survival of mangroves may also ***,it is essential to evaluate the stability of mangrove ecosystems under floods.

关键词： mangrove flood ecosystem stability resistance resilience Southeast Asia

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Deep soil carbon pool responses to climate change in the Chinese Loess Plateau

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Science Bulletin 2025年第4期70卷 504-507页

作者： Guangyao Gao Binbin Li Karl J.Niklas Yuanyuan Huang Mingxiang Xu Guobin Liu Bojie Fu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Soil and Water Conservation Science and Engineering Northwest A&F UniversityYangling 712100China School of Integrative Plant Science Cornell UniversityIthacaNY 14853USA Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China National Observation and Research Station of Earth Critical Zone on the Loess Plateau in Shaanxi Xi’an 710061China University of Chinese Academy of Sciences Beijing 100049China Shaanxi Yan'an Forest Ecosystem Observation and Research Station Beijing 100085China

Soil carbon(C)reservoirs,encompassing both organic(SOC)and inorganic(SIC)forms,represent the largest terrestrial carbon sink,surpassing the carbon stored in vegetation and the atmosphere combined[1].In light of the pressing concerns surrounding global warming and its cascading effects on climate dynamics,the scientific community has devoted significant attention to delineating the quantity,typology,and spatial distribution of soil C[2],[3].While research efforts have predominantly concentrated on SOC,given its substantial contribution to soil C content compared with SIC,it is important to recognize that SIC also plays a significant role,particularly in deeper soil horizons[4].Notably,in arid and semi-arid regions,which encompass approximately 41%of the Earth’s terrestrial surface,SIC is the dominant form of soil C[5],[6],with SIC pools in both top and deep soils exceeding SOC by factors ranging from 2 to 10[7].Consequently,there is a critical imperative to accurately quantify both SOC and SIC stocks across various soil depths in these water-limited regions[7].

关键词： soil carbon Plateau

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Understanding the spatial representativeness of air quality monitoring network and its application to PM_(2.5)in the China's Mainland

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Geoscience Frontiers 2022年第3期13卷 130-138页

作者： Ling Su Chanchan Gao Xiaoli Ren Fengying Zhang Shanshan Cao Shiqing Zhang Tida Chen Mengqing Liu Bingchuan Ni Min Liu Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration School of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Graduate University of Chinese Academy of Sciences Beijing 100049China China National Environmental Monitoring Centre Beijing 100012China Institute of Eco-Chongming Shanghai 200241China

Air pollution has seriously endangered human health and the natural ecosystem during the last *** quality monitoring stations(AQMS)have played a critical role in providing valuable data sets for recording regional air *** spatial representativeness of AQMS is a critical parameter when choosing the location of stations and assessing effects on the population to long-term exposure to air *** this paper,we proposed a methodological framework for assessing the spatial representativeness of the regional air quality monitoring network and applied it to ground-based PM_(2.5)observation in the mainland of *** multidimensional Euclidean distance between each pixel and the stations was used to determine the representativeness of the existing monitoring *** addition,the K-means clustering method was adopted to improve the spatial representativeness of the existing *** results showed that there were obvious differences among the representative area of 1820 stations in the mainland of *** monitoring stations could well represent the PM_(2.5)spatial distribution of the entire region,and the effectively represented area(*** area where the Euclidean distance between the pixels and the stations was lower than the average value)accounted for 67.32%of the total area and covered 93.12%of the *** additional stations were identified in the Northwest,North China,and Northeast regions,which could improve the spatial representativeness by 14.31%.

关键词： PM_(2.5) Euclidean distance Spatial representativeness China

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Status and path of intergenerational transmission of poverty in rural China:A human capital investment perspective

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Journal of Integrative Agriculture 2021年第4期20卷 1080-1091页

作者： BAI Yun-li ZHANG Lin-xiu SUN Ming-xing XU Xiang-bo Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101P.R.China UN Environment Programme-International Ecosystem Management Partnership Beijing 100101P.R.China

This paper focused on the intergenerational transmission of poverty in rural China by estimating the intergenerational transmission of earnings and stated its mechanism from the perspective of human capital investment before children participated in the labor *** data used in this study were longitude data collected in 2000 households of 100 villages among 25 counties across five provinces in 2005,2008,2012,2016,and *** and quantitative methods were *** found a significant intergenerational transmission of earnings in rural China,especially for the pairs of father–children and parents–*** intergenerational earnings'elasticities were much less than those in urban areas,which indicated better social mobility in rural areas than that in urban *** children with parents who could earn much were more likely to be invested before they participated in the labor market,gain a high education and have more *** cases further showed that the mechanism of human capital investment in children breaking the intergenerational transmission of poverty and promoting social mobility.

关键词： poverty intergenerational transmission human capital rural China

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Cultivated Grassland Development on the Tibetan Plateau:Current Status,Challenges,Suggestions

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Journal of Resources and Ecology 2024年第4期15卷 804-813页

作者： HOU Ge SHI Peili ZHAO Guangshuai CHEN Xueying HUANG Xiaofang DUAN Cheng Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Development Research Center National Forestry and Grassland AdministrationBeijing 100714China University of Chinese Academy of sciences Beijing 100049China

The Tibetan Plateau is vital for animal husbandry in China,and relies heavily on its natural ***,grassland degradation,increasing livestock numbers,and uneven grazing practices are exacerbating the grass-livestock *** grasslands are a key strategy to address this *** this review,we evaluate the current status,challenges,and suggestions for developing and managing Tibetan Plateau cultivated *** discernible advancements have been made in the cultivated grasslands in this region,persistent challenges *** challenges stem from issues like low awareness and enthusiasm among farmers and herders,uneven cultivated grassland distribution,and limited scientific and technological *** on these challenges,we propose strengthening the promotion of artificial forage,implementing a rationalized grassland layout,and improving the scientific and technological contributions to forage species selection,sowing,management,and *** summary,cultivated grasslands in the Tibetan Plateau offer promising prospects but still face significant *** these obstacles will require innovative approaches to unlock the full potential of cultivated grasslands in this unique ecological niche.

关键词： animal husbandry balance of grass and livestock cultivated grassland Tibetan Plateau

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Temporal and Spatial changes in flood disaster risk over the past 30 years in the Poyang lake region, China

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Natural Hazards 2025年 1-29页

作者： Zhao, Bingyu Wu, Jianjun Tian, Feng Liu, Mengxue Chen, Meng Lin, Jingyu State Key Laboratory of Remote Sensing Science Beijing Normal University Beijing China Faculty of Geographical Science Beijing Normal University Beijing China Beijing Key Laboratory for Remote Sensing Environment and Digital Cites Beijing Normal University Beijing China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Lhasa Plateau Ecosystem Research Station Chinese Academy of Sciences Beijing China

Evaluating the spatiotemporal characteristics of flood hazard risk is essential for stakeholders to undertake disaster preparedness and mitigation activities. Traditional hydrological modeling, hydrological station methods, and multi-indicator analysis techniques struggle to objectively and accurately capture the spatiotemporal characteristics of flood disaster risk due to challenges in spatial calibration and sparse spatial distribution, respectively. Historical remote sensing data can identify areas actually affected by floods, thereby improving flood risk assessment. In the study, Landsat and Sentinel remote sensing data from 1990 to 2023 were utilized to delineate flood inundations in the Poyang Lake region. Employing the Flood Exceedance Probability as an indicator, the study analyzes the spatiotemporal dynamics of flood disaster risk. Results indicate that: (1) Flood disaster risk is higher on the west, southwest, south, and southeast sides of Poyang Lake, along rivers, and in urban built-up areas. (2) Since 2000, the flood disaster risk in the Poyang Lake region has significantly decreased. (3) About 9.36% of the region has seen a reduction in flood risk, mainly around Poyang Lake and along rivers, related to improved disaster prevention and mitigation capabilities; about 3.80% has experienced increased risk, primarily in densely populated and built-up areas, associated with urban expansion and population growth. This study, for the first time, employs long-term earth observation data to objectively analyze the spatiotemporal variations of flood disaster risk in the Poyang Lake region, unveiling its temporal and spatial trends. These findings hold significant practical value for stakeholders in advancing flood prevention and mitigation efforts.

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