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Land-use impact on soil carbon and nitrogen sequestration in typical steppe ecosystems, Inner Mongolia

Journal of geographical Sciences 2012年第5期22卷 859-873页

作者： HE Nianpeng zhang yunhai DAI Jingzhong HAN Xingguo BAOYIN Taogetao yu Guirui Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic: Sciences and Natural Resources Research CAS Beijing 100101 China State Key Laboratory of Vegetation and Environmental Change Institute of Botany CASBeijing 100093 China Inner Mongolia Agricultural University Hohhot 010018 China institute of Natural Resources Inner Mongolia University Huhhot 010021 China

To explore the optimal land-use for soil carbon （C） sequestration in Inner Mongolian grasslands, we investigated C and nitrogen （N） storage in soil and soil fractions in 8 floristi- cally and topographically similar sites which subjected to different lancl-use types （free-grazing, grazing exclusion, mowing, winter grazing, and reclamation）. Compared with free-grazing grasslands, C and N storage in the 0-50 cm layer increased by 18.3. （15.5 Mg C ha-1） and 9.3. （0.8 Mg N ha-1） after 10-yr of grazing exclusion, respectively, and 2..9% （18.5 Mg C ha-1） and 11.5% （0.9 Mg N ha-1） after 3.-yr grazing exclusion, respectively. Similarly, soil C and N storage increased by 15.3. （12.9 Mg C ha-1） and 10.2. （0.8 Mg N ha-1） after 10-yr mowing, respectively, and 19.2. （16.2.Mg C ha-1） and 7.1% （0.6 Mg N ha-1） after 2.-yr mowing, respectively. In contrast, soil C and N storage declined by 10.6% （9.0 Mg C ha-1） and 11.4% （0.9 Mg N ha-1） after 49-yr reclamation, respectively. Moreover, increases in C and N storage mainly occurred in sand and silt fractions in the 0-10 cm soil layer with grazing exclusion and mowing. Our findings provided evidence that Inner Mongolian grassslands have the capacity to sequester C and N in soil with improved management practices, which were in the order： grazing exclusion 〉 mowing 〉 winter grazing 〉 reclamation.

关键词： carbon grazing land-use nitrogen reclamation soil fractions

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基于地表水与地下水分割校正的漓江流域水供给服务时空格局研究

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生态学报 2023年第15期43卷 6099-6116页

作者：刘佳肖玉张昌顺黄孟冬中国科学院地理科学与资源研究所北京100101 中国科学院大学北京100049

喀斯特区域水循环过程与其他地区存在显著区别,其水供给服务也具有独特的空间分布特征。然而,目前针对喀斯特地区产水量的时空变化研究较少考虑喀斯特生态系统的特殊性,导致产水量的空间模拟结果存在一定偏差。根据喀斯特地貌形态和地... 详细信息

喀斯特区域水循环过程与其他地区存在显著区别,其水供给服务也具有独特的空间分布特征。然而,目前针对喀斯特地区产水量的时空变化研究较少考虑喀斯特生态系统的特殊性,导致产水量的空间模拟结果存在一定偏差。根据喀斯特地貌形态和地下水补径排泄特征提出了一种产水量分割方法,并基于水量平衡原理建立了地表水与地下水分割校正概念模型。选取喀斯特山区典型区域漓江流域为研究区,通过上述方法校正了InVEST模型产水量模拟结果,从栅格、地貌分区和子流域3.尺度分析了漓江流域2.00—2.2.年产水量校正前与校正后时空分布格局。研究结果表明:(1)漓江流域2.00—2.2.年InVEST模型产水量呈现先减后增再减的趋势,水供给服务空间分布格局为北高南低。产水深度在岩溶区和非岩溶区几乎没有差异,但在岩溶区内部差异明显:裸露型岩溶区产水深度高于覆盖型和埋藏型,峰林平原产水深度高于峰丛洼地。子流域分区平均产水深度排序为漓江上游区>漓江中游区>恭城河区>荔浦河区>漓江下游区。(2.利用地表与地下水分割校正后,水供给服务空间分布格局为四周高于中部,西北部高于东南部。非岩溶区产水深度明显高于岩溶区,埋藏型岩溶区产水深度高于覆盖型和裸露型,峰林平原产水深度高于峰丛洼地。子流域分区平均产水深度排序为漓江中游区>漓江上游区>恭城河区>荔浦河区>漓江下游区。(3.相比InVEST模型,考虑地表水与地下水分割校正的漓江流域产水量与实测径流量之间的偏差更小,其时空分布模拟结果更为准确地评估了喀斯特地区可利用水资源量。本研究可为水资源保护政策制订与生态补偿机制建立提供更合理的科学依据和数据基础。

关键词：水供给服务产水量分割喀斯特地貌漓江流域 InVEST模型

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Rice re-cultivation in southern china： An option for enhanced climate change resilience in rice production

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Journal of geographical Sciences 2013年第1期23卷 67-84页

作者： MA Xin WU Shaohong LI yu'e zhang Xueyan GAO Qingzhu WU Yang institute of Environment and Sustainable Development in Agriculture CAAS Beijing 100083 China institute of geographic Sciences and Natural Resources {2. CAS Beijing 100101 China

Rice planted in southern china accounts for 94% of the total in sown acreage and 88% of the total in production, which matters a lot to chinese food security. However, due to the prolonged conflict between water availability and rice growth in spatial/temporal distribu- tion, rice production suffers from seasonal drought at acreage of 16%-2.%, which compro- mises food production capacity and food security. Focusing on the spatial distribution of seasonal drought with rice and the practices to adapt to it, and based on an analysis of bal- anced water supply for and demand by rice at a growing season scale during 1981-2.{2., this paper assesses the changing seasonal drought in the process of rice production under the changing climate in the future, and identifies general rice re-cultivation options for climate change adaptation. Some conclusions can be drawn as follows. （1） Rice suggests a decline in seasonal drought, with early season rice （early rice hereafter） by 12.500 km2. middle season rice （middle rice） by 80,000 km2. and in particular late season rice （late rice） by 2.,000 km2. which accounts for almost 2.% of its cultivated acreage. It is indicated that due to climate change, seasonal drought in major rice producing areas tends to alleviate in general, late season rice in particular. （2. Future climate change brings about a significant impact on the spatial/temporal distribution of water resources in rice producing areas in china. Based on ＇pre-designed＇ adaptation actions for rice-re-cultivation, the rice cultivation pattern undergoes a significant alteration between 1981-2.00 and 2.01-2.{2.. In eastern Guizhou and western Hunan, the pattern of single early plus single dry farming is changed into double cropping. In eastern Hunan, the pattern of dry cropping is changed into single early plus single dry farming In northern Anhui, the pattern of dry farming cropping is changed into middle rice. All this is aimed at a potential adequate availability of water for

关键词： climate change adaptation rice seasonal drought

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鄱阳湖植食越冬候鸟粪便对洲滩湿地薹草枯落物分解过程及碳、氮、磷释放的影响

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湖泊科学 2019年第3期31卷 814-824页

作者：张全军张广帅万松贤刘宇夏少霞李雅许策于秀波中国科学院地理科学与资源研究所中国科学院生态系统网络观测与模拟重点实验室北京100101 中国科学院大学北京100049 国家海洋环境监测中心大连116023 国家海洋局海域管理技术重点实验室大连116023 江西鄱阳湖南矶湿地国家级自然保护区管理局南昌330038

于2.17年1月-2.17年6月采用分解袋技术和鸟粪添加试验研究了鄱阳湖湿地植食性越冬水鸟粪便和典型洲滩湿地植物薹草枯落物分解过程中碳、氮、磷释放动态的差异性以及植食性越冬水鸟粪便的加入对鄱阳湖湿地薹草分解过程的影响.结果表明,... 详细信息

于2.17年1月-2.17年6月采用分解袋技术和鸟粪添加试验研究了鄱阳湖湿地植食性越冬水鸟粪便和典型洲滩湿地植物薹草枯落物分解过程中碳、氮、磷释放动态的差异性以及植食性越冬水鸟粪便的加入对鄱阳湖湿地薹草分解过程的影响.结果表明,不同分解时间内薹草枯落物、薹草+鸟粪中薹草枯落物和鸟粪{2.样品的干物质损失率和分解速率的差异性都十分显著,其数值都表现为薹草+鸟粪中薹草样品>薹草枯落物样品>鸟粪样品.鸟粪的加入显著加速了薹草分解进程,使其平均分解速率提升了约2..2.2.. Olson负指数模型模拟预测显示,薹草+鸟粪中薹草、薹草枯落物和鸟粪样品分解完成50%所需的时间依次为2.9、{2.4和{2.5天,分解完成95%所需的时间大约依次约为{2.1、{2.7和4.2.. {2.样品碳、氮、磷都表现为净释放模式,其相对回归指数之间差异性也显著.碳相对归还指数都表现为薹草+鸟粪中薹草>薹草枯落物>鸟粪,氮相对归还指数和磷相对归还指数值都表现为鸟粪>薹草+鸟粪中薹草>薹草枯落物.本研究推测鸟粪添加给分解环境带来额外的营养物质,使分解者微生物的数量、种类、活性增加以及鸟粪刺激产生了一系列降解酶,如木质素酶、纤维素酶、蔗糖酶等,胞外酶数量和活性增加,是鸟粪促进薹草分解的关键因素,而样品中初始养分含量以及分解过程碳、氮、磷化学计量比的变化是造成其分解速率和养分释放差异显著的主要原因.

关键词：鄱阳湖越冬水鸟湿地植物分解过程湿地碳、氮、磷生物地球化学循环

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Fundamental research and Policy on Carbon Neutrality

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Fundamental research 2022年第3期2卷 355-356页

作者： Minhan Dai Guirui yu Xiliang zhang Zhijun Jin Xiaoye zhang Xudong Zhu State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China institute of Energy Environmentand EconomyTsinghua UniversityBeijing 100084China institute of Energy Peking UniversityBeijing 100871China Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological SciencesBeijing 100081China

The emission of anthropogenic CO_(2. into the atmosphere since the Industrial Revolution and its subsequent distribution across the oceanic,land,and atmospheric components of the Earth system have led to an unprecedented perturbation of the global carbon cycle with severe consequences,as demonstrated by the ongoing climate crisis(e.g.,Gruber et al.,2.19;IPCC,2.2.,2.2.)[1-3..These human-induced changes of the climate system may have exceeded the safety threshold,resulting in profound impacts on the global economy and sustainable *** response to the crisis,the Paris Agreement defines climate-warming targets of 2. and 1.5℃,associated with end-of-century atmospheric CO_(2. concentrations of ca.450 and 400 ppm,*** scenarios approach carbon neutrality by ca.2.70 and 2.55,respectively,and remain negative thereafter[4].More than 13. countries have signed the Paris Agreement and proposed emission reduction roadmaps to achieve carbon *** has pledged to reach carbon emission peak by 2.3. and to achieve carbon neutrality by 2.60,showing china’s strong will to strengthen its national strategy of sustainable development and its ambition,as part of the global force,to fight against the ongoing climate crisis.

关键词： consequences neutral sustainable

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三江源区人兽冲突现状分析

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兽类学报 2019年第4期39卷 476-484页

作者：闫京艳张毓蔡振媛陈家瑞覃雯张婧捷连新明张同作中国科学院西北高原生物研究所高原生物适应与进化重点实验室西宁810001 中国科学院大学北京100049 青海省林业和草原局西宁810008 青海省动物生态基因组学重点实验室西宁810001

本研究整理了2.15-2.16年三江源区曲麻莱县、治多县和囊谦县的人兽冲突记录,并对主要肇事物种和人兽冲突的时间分布、地点分布以及受损类型的分布进行了统计分析。结果显示:(1)主要肇事野生动物依次为狼(978起,64.1{2.)、棕熊(117起,7.6... 详细信息

本研究整理了2.15-2.16年三江源区曲麻莱县、治多县和囊谦县的人兽冲突记录,并对主要肇事物种和人兽冲突的时间分布、地点分布以及受损类型的分布进行了统计分析。结果显示:(1)主要肇事野生动物依次为狼(978起,64.1{2.)、棕熊(117起,7.67%)、雪豹(5起,0.{2.%)和野牦牛({2.,0.2.%),其余42.起冲突(2..67%)未记录肇事野生动物;(2.人兽冲突时间分布不稳定,其高发期在不同年份不同地区都有所不同,总体来看,每年的1月、2.和12.棕熊和狼引起冲突较少,高峰期通常为6-9月;({2.从地区分布看,人兽冲突热点区域是曲麻莱县和治多县,特别是曲麻莱县秋智乡和麻多乡,治多县治渠乡、多彩乡、立新乡和扎河乡,曲麻莱县和治多县交接区域是人兽冲突高发区,囊谦县人兽冲突整体相对较轻;(4)从受损类型看,对牛的攻击和伤害是最主要的受损类型(749次,79.94%),明显多于对羊(56次,5.98%)和马(2.次,2.56%)造成伤害的冲突,以及对房屋和家具等其它财产造成破坏的冲突(108起,11.5{2.)。本研究结果为三江源生态保护和国家公园建设制定更有效的预防和缓解人兽冲突的措施等提供了可靠依据。

关键词：三江源人兽冲突狼棕熊雪豹

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城镇建设用地与经济发展空间格局耦合特征与驱动机制——以福建省为例

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地理与地理信息科学 2019年第6期35卷 97-104页

作者：刘钰余卓芮刘宛晨马海涛张鹏岩张浩河南大学土木建筑学院河南开封475003 河南大学中原发展研究院河南开封475003 复旦大学环境科学与工程系上海200438 中国科学院地理科学与资源研究所北京100101 河南大学黄河中下游数字地理技术教育部重点实验室河南开封475003

基于Theil指数、重心模型、空间耦合指数和局域Moran's I指数,分析了福建省城镇建设用地与经济发展空间格局的耦合特征;采用最小二乘法、虚拟变量和面板回归模型,探讨了两者空间格局耦合的驱动机制。结果显示:1)建设用地和经济发展在空... 详细信息

基于Theil指数、重心模型、空间耦合指数和局域Moran's I指数,分析了福建省城镇建设用地与经济发展空间格局的耦合特征;采用最小二乘法、虚拟变量和面板回归模型,探讨了两者空间格局耦合的驱动机制。结果显示:1)建设用地和经济发展在空间集中度上都呈现先上升后下降的过程,建设用地偏向于集中在行政等级较高的市辖区,而经济发展倾向于在沿海都市连绵区集聚,两者重心都有向东南偏移趋势(建设用地重心南移明显),两者空间格局耦合呈现东西分异和“中心-外围”结构。2.第二产业GDP占比、县域总人口、集体企业从业人口、企业利润和社会消费是影响两者空间格局耦合的主要因素;两者的耦合机制存在显著的东西差异和行政单元间的个体差异。最后,提出了引导建设用地与经济发展空间耦合发展的政策建议。

关键词：建设用地经济发展空间格局耦合驱动机制福建省

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Sustainable Development and Tourists’Satisfaction in Historical Districts:Influencing Factors and Features

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Journal of Resources and Ecology 2021年第5期12卷 669-681页

作者： yu Wenting ZHU He zhang Shuying beijing institute of Graphic Communication Beijing 102600China institute of geographic Sciences and Natural Resources {2. Chinese Academy of SciencesBeijing 100101China

Determining how to achieve sustainable development and protection of historical districts is a worthwhile research *** a vital way to update urban space,tourism development in historical districts is an effective tool for redistributing urban functions and increasing urban *** paper takes the Insa-dong in South Korea as a case study for the evaluation of tourist satisfaction in historical districts,based on 550 *** questionnaire contains 3. evaluation indicators,and the subjects’subjective judgment and satisfaction with Insa-dong are measured in the form of the Likert *** SPSS to analyze tourists’satisfaction with historical districts,this studyfinds that:(1)The tourist satisfaction evaluation of Insa-dong includes six dimensions in total:"Embodiment of historical elements","The blend of tradition and modernity","Industry distribution and type","Consumer demand","Street layout and function"and"Landscaping".(2."The blend of tradition and modernity"has the highest weight while"Industry distribution and type"has the lowest one in the analysis of factors influencing overall satisfaction.(3.The analysis of the common factor weights and the common factor satisfaction levels shows that"The blend of tradition and modernity"and"Street layout and function"are the parts that need to be improved."Consumer demand"also has a lot of room for *** research results will be beneficial for enhancing the tourist experiences of historical districts and they provide a theoretical basis and practical experience reference for effective protection and sustainable development of historical districts.

关键词： historical district sustainable development satisfaction Insa-dong South Korea

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The Evaluation of Urban Green Space Landscape Changes and Ecosystem Services in beijing

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Journal of Resources and Ecology 2022年第5期13卷 897-911页

作者： XIAO yu GAN Shuang HUANG Mengdong liu Jia MAO Hui {2. Changshun QIN Keyu XIE Gaodi University of chinese academy of Sciences Beijing 100049 China institute of geographic Sciences and Natural Resources {2. Chinese Academy of SciencesBeijing 100101China Graduate School of Media and Governance Keio UniversityFujisawa 2520882Japan College of Resources Sichuan Agricultural UniversitySichuan 611130China

As a very important part of the urban ecosystem,the urban green space system plays an active role in maintaining the urban ecosystem stability,providing ecosystem services,and improving the quality of the urban *** order to deal with the problems brought about by the deterioration of the urban ecological environment,it is necessary to study and analyze the spatial distribution pattern,evolutionary characteristics and ecosystem services of urban green space to maximize its ecological benefits and comprehensive *** this study,we took beijing urban area as an example,and based on the spatial distribution data of urban green space and remote sensing data,we first calculated the urban green space type transition matrix,landscape pattern index and ecosystem ***,we analyzed the changes in urban green space landscape patterns,ecosystem services and their spatial distributions from 2.00 to 2.2.,and studied the interactive relationships between landscape changes and changes in ecosystem *** results showed three key findings.(1)beijing’s urban green space construction has achieved remarkable results from 2.00 to *** area of green space has increased by 77.41%,mainly from cultivated land and construction land.(2.From 2.00 to 2.2.,the amounts of dust retention,SO_(2. absorption,NO_(2. absorption,cooling and humidification,carbon fixation and oxygen release,and rainwater runoff reduction in beijing’s urban green space have shown continuous increases in general.(3.There is a close relationship between urban green space landscape changes and green space ecosystem services,and total area(TA)has the highest correlation with ecosystem *** for rainwater runoff reduction,the correlation coefficients between TA and ecosystem services are all higher than *** {3. can provide theoretical guidance for optimizing beijing’s green space and determining how to maximize the effect of green space for improving the ecological enviro

关键词： Urban green space landscape ecosystem services landscape index beijing

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Carbon sequestration potential and its eco-service function in the karst area, china

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Journal of geographical Sciences 2017年第8期27卷 967-980页

作者： SONG Xianwei GAO Yang WEN Xuefa GUO Dali yu Guirui HE Nianpeng zhang Jinzhong College of Resources and Environment Southwest University Chongqing 400716 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China University of chinese academy of Sciences Beijing 100049 China

The karst critical zone is an essential component of the carbon （C） pool, constituting the global C cycle. It is referred to as one of the ＂residual land sink＂ that remains largely in- determinate. Karst area （2.2.10^7 km^2. comprises 15% of the world＇s land area, and karst area comprises 3.44~106 km^2.of area in {2.. Due to the complexity of karst structure and its considerable heterogeneity, C sequestration rate estimations contain large inaccuracies, especially in relation to the different methods used in calculations. Therefore, we reevaluated rock weathering-related C sink estimations in {2. （approximately 4.74 Tg C yr^-1）, which we calibrated from previous studies. Additionally, we stipulated that more comprehensive re- search on rock-soil-biology-atmosphere continuum C migration is essential to better under- stand C conversion mechanisms based on uncertainty analyses of C sink estimations. Moreover, we stressed that a collective confirmation of chemical methods and simulated models through a combined {3. effort could at least partially eliminate such uncertainty. Furthermore, integrated C cycling {3. need a long-term observation of the carbon flux of multi-interfaces. The enhanced capacity of ecosystem C and soil C pools remains an effective way of increasing C sink. Karst ecosystem health and security is crucial to human social de- velopment, accordingly, it is critical that we understand thresholds or potential C sink capacities in karst critical zones now and in the future.

关键词： karst karst critical zone carbon sink carbon sequestration rate china

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