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Journal of Plant Ecology 2023年第5期16卷 44-57页

作者： Le Sun Jian Sun Jun-Xi Wu Zi-Yin Du You-Jun Chen Yi Wang Miao Liu Wen-Cheng Li Er-Yuan Liang Key Laboratory of Tibetan Plateau Earth System Environment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 1oo1o1China School of Geographical Sciences China West Normal UniversityNanchong 637002China Institute of the Qinghai-Tibetan Plateau Southwest Minzu UniversityChengdu 610500China School of Life Sciences and School of Ecology State Key Lab of Biological ControlSun Yat-sen UniversityGuangzhou 510275China College of Grassland Science and Technology China Agricultural UniversityBeijing 100193China

了解在不同生态系统中植物生物量分配的调控机制是阐明植物适应性策略的重要理论基础。目前,虽然生境条件对植物生物量分配的影响已被广泛研究,但对植物群落性状和功能(plant community traits and functions,PCTF)如何调控生物量分配,... 详细信息

了解在不同生态系统中植物生物量分配的调控机制是阐明植物适应性策略的重要理论基础。目前,虽然生境条件对植物生物量分配的影响已被广泛研究,但对植物群落性状和功能(plant community traits and functions,PCTF)如何调控生物量分配,特别是在高寒草地生态系统中的研究却较少。本研究计算了在群落水平上的5种叶片功能性状的群落加权平均值(community-weighted means,CWM),并利用相关分析、方差分解分析和结构方程模型探讨了PCTF与生物量权衡之间的关系。研究结果发现,高寒草甸(alpine meadow,AM)和高寒草原(alpine steppe,AS)的权衡值都大于零,但两者存在显著差异,AM的权衡值(0.203)明显高于AS(0.088)。此外,决定AS生物量分配的关键因素是物种丰富度(0.69)和叶片干物质含量(CWM_(LDMC),0.42),而在AM中,关键因素是叶片干物质含量(CWM_(LDMC),0.48)和叶片碳含量(CWM_(LC)-0.45)。值得注意的是,无论AS中的CWM_(LDMC)和物种丰富度,还是AM中的CWM_(LDMC)和CWM_(LC)都主要受气候因素中的降水调节。总而言之,降水往往通过对PCTF的影响来调控高寒草地的生物量分配,因此强调了PCTF在调节降水梯度上植物生物量分配策略的重要性。

关键词：群落加权平均权衡生物量分配植物群落性状和功能高寒草地青藏高原

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Agricultural Land Suitability of Production Space in the Taihang Mountains, China

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Chinese Geographical Science 2019年第6期29卷 1024-1038页

作者： GENG Shoubao SHI Peili ZONG Ning ZHU Wanrui Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

The contradiction between the shortage of land for agriculture due to rapid expansion of industrialization and urbanization and increasing population pressure is projected to impose great threats to future food *** land suitability evaluation is an effective approach to improve the utilization of land resources for crop production and thus enhance the capacity of food *** this study, we evaluated the land suitability for agriculture of the production space in the Taihang Mountains by three steps: establishing indicator system, determining weights for indicators, and constructing a fuzzy matter-element model to assess the grades of *** showed that the land suitability had a significant linear correlation with potential crop yields, indicating our evaluation was effective to predict crop *** spatial pattern of land suitability for crop production demonstrated that land with higher suitability was generally located in piedmont plains and basins, while land with lower suitability was mostly situated in mountainous *** area of highly, moderately, marginally suitable and unsuitable land for agriculture was 32.13%, 28.58%, 37.49% and 1.80% of the production space, ***, the correlation degree analysis indicated that the requirements of these four suitability grades were currently not satisfied but could be potentially *** terms of indicator weights, soil properties were much more important than topography and location conditions to influence the grades of *** all indicators, slope, soil organic matter, soil texture and soil depth were the most influential factors, so slope farming prevention and organic fertilization were most likely to improve land suitability for *** the outputs of our land suitability evaluation model with the distribution of the existing croplands, we found that about 66.52% of marginally suitable and 54.55% of unsuitable land for agricul

关键词： agricultural land suitability matter-element model production space the Taihang Mountains

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Achieving accurate regional carbon-sink accounting and its significance for “missing” carbon sinks

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The Innovation 2024年第1期5卷

作者： Yang Gao Shuoyue Wang Leiyi Chen Fan Wu Guirui Yu Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093 China

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Responses of soil greenhouse gas fluxes to land management in forests and grasslands: A global meta-analysis

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Science of the Total Environment 2025年 967卷 178773页

作者： Liu, Huanhuan Miao, Yuqi Chen, Yu Shen, Yifan You, Yongfa Wang, Zhuonan Gang, Chengcheng College of Grassland Agriculture Northwest A&F University Yangling China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China Department of Earth and Environmental Sciences Boston College Chestnut HillMA United States Natural Resources Ecology Laboratory Colorado State University Fort CollinsCO United States Institute of Soil and Water Conservation Northwest A&F University Yangling China Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources Yangling China School of Integrative Plant Science Cornell University IthacaNY United States

Land management practices significantly influence soil greenhouse gas (GHG) emissions. Despite individual measurements of the impacts of forest and grassland ecosystem management practices (FGEM) on GHG emissions, a comprehensive global-scale synthesis and comparison remain absent. In this study, a global meta-analysis was conducted to analyze the responses of three key soil GHGs, including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), to various FGEM, including forest burning (FB) and thinning (FT), grassland grazing (GG), fencing (GF), and mowing (GM) based on 1643 observations from 317 individual studies. Moderator factors and the underlying mechanisms driving these responses were also explored. Results revealed that in managed forests, FB significantly reduced soil CO2 and N2O emissions, while FT decreased soil CH4 uptake capacity without affecting CO2 and N2O emissions. In managed grasslands, GG reduced soil CO2 emission, while GF increased it;both had neutral impacts on soil CH4 and N2O fluxes. GM did not affect GHG fluxes. Overall, forest management decreased soil CO2 emission and CH4 uptake capacity, whereas grassland management had a neutral effect on soil GHG fluxes. Temporal analysis revealed diminishing effects of FGEM on CO2 emissions over the long term. Soil CH4 uptake exhibited divergent responses over time, and soil N2O emissions remained relatively constant. Compared to managed grassland, soil GHG fluxes in managed forests were more sensitive to aridity conditions, with forest management generally restraining soil CO2 and N2O emissions and CH4 uptake in humid regions. Meta-regression analysis highlighted carbon content, soil temperature, and soil moisture as primary drives of changes in soil CO2 and CH4 fluxes, while soil N2O fluxes were more susceptible to soil organic carbon and microbial biomass nitrogen. The dependence of soil GHG fluxes on climate zones and management duration should be integrated into Earth system models for mo

关键词： Greenhouse gas emissions

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Coupling between plant nitrogen and phosphorus along water and heat gradients in alpine grassland

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SCIENCE OF THE TOTAL ENVIRONMENT 2020年 701卷 134660-000页

作者： Zhou, Tian-Cai Sun, Jian Liu, Miao Shi, Pei-Li Zhang, Xu-Bo Sun, Wei Yang, Gang Tsunekawa, Atsushi Chinese Acad Sci Inst Geog Sci & Nat Resources Res Key Lab Ecosyst Network Observat & Modelling Synth Res Ctr Chinese Ecosyst Res Network Beijing 100101 Peoples R China Univ Chinese Acad Sci Coll Resources & Environm Beijing 100049 Peoples R China Chinese Acad Sci Inst Geog Sci & Nat Resources Res Key Lab Ecosystem Network Observat & Modeling Lhasa Plateau Ecosystem Res Stn Beijing 100101 Peoples R China Tottori Univ Arid Land Res Ctr Tottori 6800001 Japan Southwest Univ Sci & Technol Sch Life Sci & Engn Mianyang 621010 Sichuan Peoples R China

The biogeochemical cycles of plant nitrogen (N) and phosphorus (P) are interlinked by ecological processes, and the N and P cycles become uncoupled in response to global change experiments. However, the complex natural hydrothermal conditions in arid, semiarid and humid grassland ecosystems may have different effects on the availability of soil nutrients and moisture and may induce different balances between the N and P cycles. Here, we evaluated how the aridity index (AI) affects the balance between N and P of alpine grassland by the collected 115 sites along water and heat availability gradients on the Tibetan Plateau. We found that AI was negatively related to the variation in the coefficients of soil total dissolved N (TDN) and soil availability of P (SAP), and positive effects of AI, TDN and SAP on the coupling of plant N and P were detected. Thus, AI was positively correlated with soil nutrients and moisture, which may favor the co-uptake of soil nutrients by plants, resulting in a small variation in plant N and P in humid environments. Conversely, in arid environments with temporally variable soil nutrients, the plants tend to be more flexible in their N:P stoichiometry. Generally, our findings suggest that plant N and P could be more strongly coupled in humid conditions than in arid environments across alpine grasslands, with potential decoupling of the N biogeochemical cycle from P in an arid environment with an asynchronous dynamic of temperature and precipitation. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Alpine grasslands Aridity index Nutrient availability Ecological stoichiometry Tibetan Plateau

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Overview of the Measures and Techniques Used to Protect Traffic Lines against Shifting Sands in China

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Journal of Resources and Ecology 2021年第1期12卷 124-135页

作者： MA Ning GUO Qun LI Yu LI Shenggong Key Lab of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China National Ecosystem Science Data Center Beijing 100101China Sino-Danish College University of Chinese Academy of SciencesBeijing 100190China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China Key Lab for Resources Use and Environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Shifting sands are one of the main contributors to desertification in China. This paper briefly reviews the measures and techniques which are used to protect traffic lines by stabilizing and fixing sands in the desert and desertification-affected arid and semi-arid areas in north China. We introduce the types and features of these measures and techniques, including mechanical, chemical, and biological measures, and outline how they have been applied in different areas and in different traffic lines over the past six decades, from 1950 s to 2010 s, taking the Baotou-Lanzhou railway, the Qinghai-Tibet railway, and the Tarim Desert highway as examples Mechanical measures such as erecting sand-retaining wind walls and placing straw checkerboards have proved to be very efficient for stabilizing shifting sands and protecting traffic lines that pass through the desert areas. Chemical measures are not widely used in the current sand fixing systems because of their high cost and potential pollution risks. Biological measures are preferred because they exhibit much better sand fixation performance and longer duration than the former two types of measures despite their relatively high cost. A combination of different measures is usually adopted in some areas to attain better sand-fixing effects. Stabilizing sand dune surfaces with mechanical measures or irrigation from underground water or river if available helps early recruitment of some drought-tolerant plants(xerophytes). We also point out the restrictions for existing sand-fixing measures and techniques and future research orientation. This review has implications for addressing eco-environmental issues associated with infrastructure construction that is part of the Belt and Road Initiative in desert and desertification-affected arid and semi-arid areas in the Mongolian Plateau.

关键词： traffic lines desertification shifting sands wind erosion sand fixing system

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Influences on Phosphorus Availability in Temperate and Subtropical Forest Soils

SSRN

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SSRN 2022年

作者： Liu, Shuang Zhang, Xinyu Dungait, Jennifer A.J. Wang, Jing Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing100190 China Geography College of Life and Environmental Sciences University of Exeter Rennes Drive ExeterEX4 4RJ United Kingdom

Phosphorus (P), an essential element for life and ecosystem function, is a limiting element for plants and microorganisms in forest soil profiles. P availability is affected by three main mechanisms, namely the dissolution of H + , mineralization of enzymes, and assimilation by phosphate-solubilizing microorganisms (PSMs). The effects of these three mechanisms on P availability vary across different forest biomes because of variability in the soil properties, microbial communities, and interactions in the soil. In this study, we investigated how the physical, chemical, and biological properties of temperate and subtropical forest soils affected the P availability. Using a structural equation model, we found that enzyme mineralization (1.38) had most effect on the available P in these forest soils, followed by PSMs assimilation (0.76), and H + dissolution (0.42). The available P content was higher in the temperate forest soil than in the subtropical forest soil, and the available P decreased with depth in the soil profiles, and was highest in the topsoils and lowest in the subsoils. The enzyme mineralization (acid phosphomonoesterase-V max ) gave good predictions of the available P in the P-poor subtropical forest soil, in line with the economic principles of enzymes. The available P and N contents were positively correlated in the subtropical forest soil, representing a trade-off between the N and P availabilities. The DNA content was the strongest predictor of the available P in the P-rich temperate forest, indicating that PSMs could acquire large quantities of P selectively and store it for potential microbial P sources. Our meta-analysis showed that there was a positive linear relationship between the MBP and available P contents in forest soils worldwide. We also found that the pH had a positive effect on the alkaline phosphomonoesterase-V max and indirectly affected the P availability, which indicates that the enzyme mineralization and the P availability would

关键词： Phosphorus

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Nitrogen Addition Enhances Tree Radial Growth But Weakens its Recovery from Drought Impact in a Temperate Forest in Northern China

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SSRN 2023年

作者： Cao, Jing Liu, Hongyan Zhao, Bo Li, Zongshan Liang, Boyi Song, Zhaopeng Shi, Liang Wu, Lu Wang, Qiuming Zhu, Yanpeng Li, Shuang State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China College of Urban and Environmental Science MOE Laboratory for Earth Surface Processes Peking University Beijing100871 China Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Science Chinese Academy of Sciences Beijing China College of Forestry Beijing Key Laboratory of Precise Forestry Institute of GIS RS & GPS Beijing Forestry University Beijing100083 China China Meteorological Administration Training Center Beijing100081 China

Forest growth in most parts of northern China is currently limited by drought and low nitrogen availability. The extreme drought events have increasingly threatened multiple ecosystem services provided by forests. Whether nitrogen addition will have a detrimental/beneficial moderation effect on forest resistance and recovery to extreme droughts was remained unclear. Here, Pinus tabulaeformis is the research object in this study, which is the main artificial forest species in northern China. We investigate the role of climate and nitrogen addition in driving multi-year tree growth with a combination of an 8 year nitrogen addition experiment and 184 tree ring series. An extreme drought event occurred during the experiment, providing an opportunity for us to explore the effects of drought and nitrogen addition on tree resistance and recovery. We found that nitrogen addition is beneficial for increasing the resistance of young trees, but has no effect on old trees. The recovery of trees weakens significantly with increasing nitrogen addition, and the reduction in fine root biomass caused by multiyear nitrogen addition is a key influencing factor of limited recovery after extreme drought. Our study implies that the combined effect of increasing drought and nitrogen deposition might increase the risk of pine forest mortality in northern China. © 2023, The Authors. All rights reserved.

关键词： Recovery

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Maximum Potential of Vegetation Carbon Sink in Chinese Forests

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SSRN 2023年

作者： Peng, Bo Zhou, Zhiyong Cai, Weixiang Li, Mingxu Xu, Li He, Nianpeng School of Ecology and Nature Conservation Beijing Forestry University Beijing100083 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing100049 China Earth Critical Zone and Flux Research Station of Xing'an Mountains Chinese Academy of Sciences Daxing'anling165200 China Center for Ecological Research Northeast Forestry University Harbin 150040 China

Forest vegetation is essential in sequestering CO2 from the atmosphere and mediating global warming. The carbon (C) sink potential of forest vegetation in different provinces is vital for policymakers to develop C-neutral technical routes and regional priorities in China;however, the mechanism remains unclear. In this study, we compiled the public data on forest vegetation biomass or storage along forest succession series between 2003 and 2022 and obtained the spatial variation of the maximum C storage of forest vegetation (BCmax) using classic logistic equation and nonlinear fitting. Furthermore, the C sink potential (∆Cpot) of the Chinese forest vegetation was calculated based on the differences between the BCmax and intensive field-investigated data in the 2010s. The results showed that the BCmax in the Chinese forest vegetation was approximately 19.03 Pg. The BCmax in southwest and northeast China were higher than those in other regions. The ∆Cpot was estimated as 8.83 Pg based on the data of the 2010s. Moreover, 1 × 1 km spatial raster data for ∆Cpot were produced using the spatial raster calculation. Similarly, the per capita ∆Cpot of regions with low economic development (southwest, central, and southern Chinese provinces) was 5–10 times higher than those of regions with a higher economic level. The ∆Cpot correlates negatively with gross domestic product (GDP)across all Chinese provinces. Our findings provide new insights into the C sink potential of the Chinese forest vegetation under natural restoration and emphasize that some differences in financial and political support among different provinces facilitate achieving a large C sink potential for C neutrality. © 2023, The Authors. All rights reserved.

关键词： Global warming

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RESEARCH PROGRESS ON THE IMPACT OF NITROGEN DEPOSITION ON GLOBAL GRASSLANDS

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Frontiers of Agricultural Science and Engineering 2022年第3期9卷 425-444页

作者： Carly J.STEVENS Sofía BASTO Michael DBELL Tianxiang HAO Kevin KIRKMAN Raul OCHOA-HUESO Lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK Unidad de Ecologia y Sistematica Departamento de BiologiaFacultad de CienciasPontificia Universidad JaverianaCarrera 7 No.43-82 Ed.Jesus Emilio Ramirez(53)BogotaColombia National Park Service Air Resources DivisionLakewoodCO 80235USA Synthesis Research Center of Chinese Ecosystem Research Network Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil Interactions of Ministry of EducationBeijing Key Laboratory of Farmland Soil Pollution Prevention and RemediationChina Agricultural UniversityBeijing 100193China School of Life Sciences University of KwaZulu-NatalDurban4041South Africa Departamento de Biologia-IVAGRO Universidad de CadizCampus Rio San Pedro11510 Puerto RealSpain Department of Terrestrial Ecology Netherlands Institute of Ecology(NIOO-KNAW)P.O.Box 506700 ABWageningenthe Netherlands

Grasslands are globally-important ecosystems providing critical ecosystem *** species composition and characteristics of grasslands vary considerably across the planet with a wide variety of different grasslands ***,in many regions grasslands have been impacted by atmospheric nitrogen deposition originating from anthropogenic activities with effects on productivity,species composition and diversity widely *** vary across grassland habitats but many show declines in species richness and increases in biomass production related to soil eutrophication and *** a continental level,there is considerable variation in the research effort that has been put into understanding the impacts of nitrogen *** Europe,North America and parts of Asia,although there are unanswered research questions,there is a good understanding of N deposition impacts in most grassland *** is not the case in other regions with large knowledge gaps in some parts of the *** paper reviews the impacts of N deposition on grasslands around the world,highlighting recent advances and areas where research is still needed.

关键词： acidification biomass production critical load eutrophication species composition species richness

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