检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Li, Yong Wang, Zhaosheng Huang, Mei Gong, He Sun, Hongfu Zhu, Lin National Ecosystem Science Data Center Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China College of Geoscience and Surveying Engineering China University of Mining and Technology Beijing100083 China National Satellite Meteorological Center China Meteorological Administration Beijing China

Biomass energy is a key component of renewable new energy, which is very important for energy security and environmental protection. Meanwhile, Asia is a region with intensive global energy consumption. It is of great significance to clarify its biomass energy potential and its role in energy and environment. So, we used MODIS NPP to evaluate potential biomass energy reserves and their temporal and spatial changes in Asia. The results show that the total potential biomass energy in Asia is 327.68 ± 11.11 EJ, which is approximately equal to the total energy use in all of Asia over the four years. In addition, we used the AHP and cluster analysis to investigate the degree of energy shortage in Asian *** supplying biomass energy for energy use in various countries, the number of countries with severe, moderate and mild energy shortages in Asia will decrease by 8.5%, 12.7% and 6.4% respectively. In addition, if 50% of conventional energy in Asia is replaced by biomass, its total carbon dioxide emissions will be reduced by 33% to 44%. Taken together, this shows that Asia's abundant biomass energy reserves can help alleviate energy shortages in various countries and reduce regional carbon dioxide emissions. © 2022, The Authors. All rights reserved.

关键词： Energy security

来源：评论

学校读者我要写书评

暂无评论

Water regime alters microbial mechanisms of N₂O emission in metal-contaminated paddy soils

引用

Ecotoxicology and Environmental Safety 2025年 298卷 118304页

作者： Guo, Yifan Cheng, Shulan Fang, Huajun Geng, Jing Shi, Fangying Wang, Hui Chen, Long Pu, Haiguang Liu, Bingqian Zhou, Yi Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China The Zhongke-Ji'an Institute for Eco-Environmental Sciences Ji'an 343000 China School of Geospatial Engineering and Science Sun Yat-sen University Zhuhai 519082 China

Microorganisms are essential for soil nitrous oxide (N2O) emissions through participating in key nitrogen (N)-related processes. However, the effect of water regimes on the interactions between N2O emissions and micro... 详细信息

Microorganisms are essential for soil nitrous oxide (N₂O) emissions through participating in key nitrogen (N)-related processes. However, the effect of water regimes on the interactions between N₂O emissions and microbial processes in metal-contaminated soils is unclear. Here, we conducted a soil microcosm experiment with two water management strategies (non-flooding and flooding) and six metal addition treatments including low (2 and 200 mg kg⁻¹) and high (10 and 1000 mg kg⁻¹) levels of individual and combined Cd and Cu. The effects of high levels of individual Cd and Cu contamination on soil N₂O emissions varied depending on water regimes, showing antagonistic effects under non-flooding conditions and synergistic effects under flooding conditions. High levels of co-contamination significantly inhibited nitrification under both water regimes, primarily due to reduced abundance of Nitrosospira. In contrast, this co-contamination decreased the abundance of Ramlibacter, thereby inhibiting denitrification and dissimilatory nitrate reduction to ammonium (DNRA) under flooding conditions. The inhibition of these key microorganisms and their mediated N-cycle processes reduced soil N₂O emissions under both water regimes. This reduction was greater under flooding conditions because more N-related processes were inhibited. Metagenomic binning further indicated that Nitrosospira carried nitrifying genes, while Ramlibacter contained genes involved in denitrification, assimilatory nitrate reduction to ammonium (ANRA), and DNRA. These findings implied that both microorganisms had potential to produce N₂O. Overall, water management strategies and metal contamination altered the microbial processes of N₂O emissions, highlighting the importance of appropriate water management in mitigating greenhouse gas emissions from metal-contaminated paddy soils in southern China. © 2025 The Authors

关键词： Heavy metals Metagenomic-binning N2O emissions Water management

来源：评论

学校读者我要写书评

暂无评论

Alpine Grassland Aboveground Biomass and Theoretical Livestock Carrying Capacity on the Tibetan Plateau

引用

Journal of Resources and Ecology 2022年第1期13卷 129-141页

作者： ZHANG Xianzhou LI Meng WU Jianshuang HE Yongtao NIU Ben Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences andNatural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China School of Geographic Sciences Nantong UniversityNantongJiangsu 226007China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China

The accurate simulation and prediction of grassland aboveground biomass (AGB) and theoretical livestock carrying capacity are key steps for maintaining ecosystem balance and sustainable grassland *** AGB in fenced grassland is not affected by grazing and its variability is only driven by climate change,which can be regarded as the grassland potential AGB (AGB_(p)).In this study,we compiled the data for 345 AGB field observations in fenced grasslands and their corresponding climate data,soil data,and topographical data on the Qinghai-Tibetan Plateau (TP).We further simulated and predicted grassland AGB_(p)and theoretical livestock carrying capacity under the climate conditions of the past (2000-2018) and future two decades (2021-2040) based on a random forest (RF) *** results showed that simulated AGB_(p)matched well with observed values in the field (R^(2)=0.76,P<0.001) in the past two *** average grassland AGB_(p)on the Tibetan Plateau was 102.4g m^(-2),and the inter-annual changes in AGB_(p)during this period showed a non-significant increasing ***_(p)fluctuation was positively correlated with growing season precipitation (R^(2)=0.57,P<0.001),and negatively correlated with the growing season diurnal temperature range (R^(2)=0.51,P<0.001).The average theoretical livestock carrying capacity was 0.94 standardized sheep units (SSU) ha^(-1)on the TP,in which about 54.1%of the areas showed an increasing trend during the past two *** with the past two decades,the theoretical livestock carrying capacity showed a decreasing trend in the future,which was mainly distributed in the central and northern *** study suggested that targeted planning and management should be carried out to alleviate the forage-livestock contradiction in grazing systems on the Tibetan Plateau.

关键词： alpine grassland aboveground biomass carrying capacity climate change random forest Tibetan Plateau

来源：评论

学校读者我要写书评

暂无评论

Ecological risk assessment of soil cadmium in China’s coastal economic development zone:a meta-analysis

引用

ecosystem Health and Sustainability 2020年第1期6卷 139-150,138页

作者： Mingxing Sun Ting Wang Xiangbo Xu Linxiu Zhang Jing Li Yajuan Shi Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina UN Environment-International Ecosystem Management Partnership(UNEP-IEMP) BeijingChina State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina Institute of Loess Plateau Shanxi UniversityTaiyuanChina

The coastal area of China has faced major strategic planning and environmental pollution,including heavy metals *** study aimed to provide a comprehensive evaluation of the effects of Cd pollution on the ecology in coastal areas of China.A soil Cd pollution database of 300 counties or districts in coastal areas was screened from academic dissertations and academic journal *** on the database,the ecological risk was evaluated using entropy methods and probabilistic ecological risk assessment(PERA),and the advantages and disadvantages of these methods were *** China’s coastal areas,the soil Cd content in 10.33%of the counties was higher than the minimum of risk control value(1.5 mg/kg),and in 4.00%of the counties was higher than the maximum of risk control value(4.0 mg/kg).The ecological risks were highly compatible with national strategic planning *** Province,Zhejiang Province,and Guangdong Province ranked among the top three coastal areas for soil Cd contamination,and the ecological risks were 18.80%,17.89%,and 15.77%at the maximum no-effect concentration/lowest effect concentration(NOEC/LOEC)*** study can provide insights to policymakers regarding the protection of ecosystems threatened by heavy metals in the process of regional strategic planning.

关键词： Cadmium soil ecological risk coastal economic development zone

来源：评论

学校读者我要写书评

暂无评论

Sustainable wildlife protection on the Qingzang Plateau

引用

Geography and Sustainability 2021年第1期2卷 40-47页

作者： Yangjian Zhang Ran Zhao Yaojie Liu Ke Huang Juntao Zhu Lhasa station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China Peking University Shenzhen Graduate School Shenzhen 518055China

Besides its ecological services to China and even Asia,the Qingzang Plateau(QP)hosts a rich variety of wildlife *** the last century,wildlife population decreased quickly on the QP,driven by human ***,wildlife has witnessed rapid recovery mainly propelled by a series of wildlife conservation ***,some cautions merit attentions to sustain wildlife restoration and conservation on the *** paper casted an overview of environmental and social-economic changes on the QP affecting wildlife ***-sults show that QP has been warming,which can benefit wildlife recovery by easing extreme low temperature *** fast growing social economy across the QP lays a solid economic foundation for investing on wildlife *** such as establishing conservation areas,constructing wildlife pathway corridors,and en-couraging herdsman moving out from wildlife rich regions,have boosted wildlife ***,wildlife recovery is constrained by the limited carrying capacity of the ecosystem,left by domestic ***,fences intended to delineate conservation areas or to separate each type of grassland use,have brought about profound side effects on wildlife through fragmentation of their *** is recommended to set up the fence in a more ecological way,which can be achieved by bypassing the wildlife frequent pathway and using mate-rials devoid of steel *** considering both opportunities and problems simultaneously,can the wildlife protection on the QP be sustained.

关键词： Carrying capacity Conservation Climate Social-economy The Qingzang Plateau Wildlife

来源：评论

学校读者我要写书评

暂无评论

Effects of Contour Hedgerows on Water Erosion on Sloping Farmland

SSRN

引用

SSRN 2024年

作者： Zheng, Jiangkun Yan, Junxia Hu, Wangyang Usama, Mazhar Li, Ruixin Qiu, Lingjun Lan, Zhenzhao Jia, Lizhi Jiang, Xiangang Li, Hao Wang, Yong Hou, Guirong National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River College of Forestry Sichuan Agricultural University Chengdu611130 China Department of Geography Handan College Handan056005 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 School of Civil Engineering Sichuan Agricultural University Chengdu611830 China College of Resource Sichuan Agricultural University Chengdu611130 China

Contour hedgerows are effective in controlling water erosion on sloping farmland. Although their beneficial effects have been generally recognized, further research is still needed to quantify the extent to which hedgerows reduce water erosion. This research conducted a quantitative review based on 102 global papers, including 1647 runoff and 1438 sediment paired datasets, to evaluate the effectiveness of contour hedgerows on RR and sediment reduction. The results showed that contour hedgerows were more effective in sediment reduction (61.0%) than RR (40.3%). RR in the conditions of temperate zone and simulated rainfall, were significantly higher than those in the conditions of tropical zone and natural rainfall, respectively. And sediment reduction in the conditions of herbaceous hedgerows and temperate zone were significantly higher than those in the conditions of woody hedgerows and Tropical zone, respectively. With increasement of slope gradient, hedgerow height, and hedgerow spacing, runoff reduction showed a significant decreasing trend. Whereas a significant increasing for runoff reduction occurred with increasement of hedgerow area proportion and hedgerow relative position. Meanwhile, sediment reduction decreased significantly with increasing hedgerow longitudinal section and hedgerow area proportion. Among all indices, hedgerow relative position and hedgerow spacing were the key factors controlling water erosion which account for 70% contribution. Hedgerow spatial configurations should be heavily considered when controlling water erosion by the method of hedgerows. © 2024, The Authors. All rights reserved.

关键词： Runoff

来源：评论

学校读者我要写书评

暂无评论

Changes in Soil Nutrient Stoichiometric Ratios Reveal Increasing Phosphorus Limitation Along a Tropical Soil Chronosequence

SSRN

引用

SSRN 2022年

作者： Zhao, Wen Huang, Lai-Ming Yellow River Delta Modern Agricultural Engineering Laboratory 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 Key Laboratory of Ecosystem Network Observation and Modeling China

Understanding the variations and controls of stoichiometric ratios of soil nutrients during different stages of soil evolution can provide guidance for ecosystem nutrient management and regulation. This study investigated the changes in and factors associated with soil nutrient stoichiometric ratios during different stages of soil development using a well-established soil chronosequence (0.09, 0.146, 0.64, 1.12, 1.81, and 2.30 million years) developed on basalt in southern China. Results showed that available nitrogen (AN) decreased continuously with increasing soil age. Total nitrogen (TN), total phosphorus (TP), available phosphorus (AP), and soil organic carbon (SOC) increased initially during the early stage of soil development, reaching peak values in the 0.146 million-year-old soil profiles. Thereafter, TP and AP fluctuated with increasing soil age, whereas SOC exhibited a decreasing trend with aging soil. The profile-averaged C:N (9.82–12.75), C:P (0.86–1.98), and N:P (0.86–1.98) remained relatively stable across the soil chronosequence (the coefficient of variation (CV) 0.64 million years) developed on basalt to alleviate the increasing P limitation in the late stage of soil evolution. © 2022, The Authors. All rights reserved.

关键词： Soils

来源：评论

学校读者我要写书评

暂无评论

New Framework for Evaluating ecosystem Quality in Nature Reserves based on Ideal References and key Indicators

引用

Journal of Resources and Ecology 2022年第3期13卷 466-475页

作者： WU Zhenliang HOU Jihua XU Li HE Nianpeng School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China 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 Key Laboratory of Vegetation Ecology of Ministry of Education Northeast Normal UniversityChangchun 130024China

With increasing numbers and types of nature reserves(NRs),objective evaluation and comparison of the effects of different nature NRs on conservation efforts are of great importance for protecting species diversity,ensuring reasonable national economic input,and adjusting government management *** a method for the combined assessment of flagship or umbrella species and ecosystem quality will improve the evaluation of ***,it is also important to establish a new framework for rapid evaluation of ecosystem quality,supported by the advantages of scientific,economic,and regular ***,we proposed a new framework that incorporates the novel concept of ideal references into evaluation systems,which will facilitate the comparison of results from different periods and ***,from the perspective of making the framework as objective,rapid,and economical as possible,we recommended some key ecological indicators,such as net primary productivity,soil organic matter,plant diversity,for use in the new evaluation *** new framework,referred to as“ideal reference and key indicators”(IRKI),can sufficiently meet the requirements for the rapid evaluation of ecosystem quality both regionally and ***,IRKI can identify the restoration potential and restoration periods of NRs,thus facilitating the rational distribution of resources and enhancing the protective *** are many types of NRs in China,and it is necessary to partially alter the assessment methods or parameters for different types of ***,IRKI provides a simple,clear,and comparable framework that will strongly enhance the conservation of protected areas(PAs)and facilitate the standardization of management practices.

关键词： nature reserve ecosystem quality ideal reference key indicators conservation management

来源：评论

学校读者我要写书评

暂无评论

Considerations of Forest Distribution and Native Tree Species for Afforestation in the High Altitudes on the Eastern Tibetan Plateau

引用

Journal of Resources and Ecology 2022年第1期13卷 100-106页

作者： SHI Peili ZHENG Lili ZHOU Tiancai HOU Ge ZHAO Guangshuai Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences andNatural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China School of Life Science Taizhou UniversityTaizhouZhejiang 318000China China National Forestry-Grassland Economics and Development Research Center National Forestry and Grassland AdministrationBeijing 100714China

Forests are the main components of terrestrial ecosystems and play an important role in the protection and construction of the national ecological security barrier. For a long time, China’s large-scale afforestation had been practiced in areas with rainfall higher than the 400 mm threshold, but the issue of afforestation in high altitudes on the Tibetan Plateau remains elusive in both practical experience and theoretical exploration. It is worth thinking further about what principles should be followed in the selection of tree species and suitable altitudes for afforestation in high-altitude areas, as well as what experiences and lessons of previous afforestation efforts should be applied in high-altitude areas. As per the law of vegetation zonal distribution, this paper argues that afforestation at high altitudes should comply with the principle of vegetation zonal distribution and the low temperature limitation,and points out that afforestation is feasible only within the forest distribution area and below the altitudes of climate timberlines. Furthermore, we demonstrate the potential spatial areas of afforestation, and determine the local tree species that may be used for afforestation based on the existing problems of afforestation in eastern Tibet. In summary, afforestation in high-altitude areas of the eastern Tibetan Plateau must comply with the law of zonal vegetation distribution, focus on the upper limit of altitude and the selection of suitable tree species, and adopt only suitable native tree species.

关键词： eastern Tibetan Plateau natural forest distribution climatic treeline low-temperature limitation afforestation upper limit afforestation species selection

来源：评论

学校读者我要写书评

暂无评论

中国碳收支:1980~2021年

引用

Science Bulletin 2024年第1期69卷 114-124页

作者：夏晓圣任培阳王旭辉刘丹陈修治丹利何斌何洪林居为民梁敏琪陆星劼彭静覃章才夏江周郑博魏静乐旭于贵瑞朴世龙袁文平 School of Atmospheric Sciences Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon CycleSun Yat-sen UniversityZhuhai 510245China Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing 100091China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Earth Surface Processes and Resource Ecology College of Global Change and Earth System ScienceBeijing Normal UniversityBeijing 100875China Synthesis Research Center of China’s Ecosystem Research Network Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China International Institute for Earth System Science Nanjing UniversityNanjing 210023China Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal UniversityTianjin 300387China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China

As one of the world's largest emitters of greenhouse gases,China has set itself the ambitious goal of achieving carbon peaking and carbon ***,it is crucial to quantify the magnitude and trend of sources and sinks of atmospheric carbon dioxide(CO_(2)),and to monitor China's progress toward these *** state-of-the-art datasets and models,this study comprehensively estimated the anthropogenic CO_(2)emissions from energy,industrial processes and product use,and waste along with natural sources and sinks of CO_(2)for all of China during *** recognize the differences among various methods of estimating greenhouse emissions,the estimates are compared with China's National Greenhouse Gas Inventories(NGHGIs)for 1994,2005,2010,2012,and *** CO_(2)emissions in China have increased by 7.39 times from 1980 to 12.77 Gt CO_(2)a^(-1)in *** benefiting from ecological projects(e.g.,Three Norths Shelter Forest System Project),the land carbon sink in China has reached 1.65 Gt CO_(2)a^(-1)averaged through 2010-2021,which is almost 15.81 times that of the carbon sink in the *** average,China's terrestrial ecosystems offset 14.69%±2.49%of anthropogenic CO_(2)emissions through *** provincial-level administrative regions of China,Xizang and Qinghai,have achieved carbon neutrality according to our estimates,but nearly half of the administrative regions of China have terrestrial carbon sink offsets of less than 10%of anthropogenic CO_(2)*** study indicated a high level of consistency between NGHGIs and various datasets used for estimating fossil CO_(2)emissions,but found notable differences for land carbon *** estimates of the terrestrial carbon sinks of NGHGIs urgently need to be verified with process-based models which integrate the comprehensive carbon cycle processes.

关键词： CO_(2)emission Land carbon sink China Carbon neutrality Carbon budget

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：