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Spatial heterogeneity of the driving forces of cropland change in china

Science china Earth sciences 2005年第12期48卷 2231-2240页

作者： liu xuhua1,2, wang jinfeng1, liu mingliang4.1 & meng bin1,2,3.1. institute of geographic sciences and natural resources research, chinese academy of sciences, beijing 100101, china 2. Graduate School of the chinese academy of sciences, beijing 100039, china 3. College of Arts and sciences of beijing Union University, beijing 100083, china 4. School of Forestry and Wildlife sciences, Auburn University, Auburn, Alabama, AL36849, USA 1. institute of geographic sciences and natural resources research Chinese Academy of Sciences 100101 Beijing China 2. Graduate School of the chinese academy of sciences 100039 Beijing China 3. School of Forestry and Wildlife sciences Auburn University Auburn AL36849 Alabama USA 4. College of Arts and sciences of beijing Union University 100083 Beijing China

By using digital satellite remote sensing data acquired in 1987―1989 and 1999―2000 and GIS combined with the natural and socio-economic data, this paper drew an integrated zonation of the cropland change and its driving forces in china. The results indicated that the cropland change in the study period was constrained by geographical factors and driven by cli-mate change as well as socio-economic system. Moreover, the regional differences of the drivers for cropland change were significant. In the midwest of china, natural condition changes and geographical background were the main constraints and drivers, while in Eastern china, social and economic changes and economic policies were the main driving forces. The cropland loss was nationwide. The dominant factors to cause this decrease included buildup of developing area to attract foreign capital and technologies, changes of industry structure due to urban in-fluence, the change of employment notions thanks to living standard improvement, rapid ur-banization due to the expansion of cities and towns, the diminished farming net income partly because of the global warming effects, and the rapid economic growth stimulated by the con-venient transportation system. These factors interact and interdepend with each other to cause the cropland loss in china recently. The reasons for the increase of cropland were primarily the cultivation and deforestation by the farmers who want to increase income. This study on the mechnism of LUCC relied on the cropland change integrated classification considering the natural or human factors both inside and outside the region, which provides a new approach to study the integrated regionalization and LUCC mechanism.

关键词： land use change, driving force, integrated classification, spatial statistics, cropland, china.

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An integrated approach to scaling issues in environmental change study

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Journal of geographical sciences 2000年第4期10卷 45-52页

作者： liu Hong-hui, YANG Xiao-huan, wang Nai-bin, liu Hai-yan (Center for resources and Environmental Data, institute of geographic sciences and natural resources research, chinese academy of sciences, beijing 100101, china)

Global change research and sustainable development need to be addressed at larger scales in the light of small scale process studies. Much remains to be done before the small scale, process level understanding of ecosystem responses to global change can be reliably translated to larger scales. The paper reviews the status of scaling issues and tries to find how to extrapolate our observations and our findings at site scale up to regional scale and provide ecological information and interpretations at the regional scale. An integrated approach to scaling-up from site to region is proposed combining hierarchical theory, landscape ecology, remote sensing, geographical information system (GIS) with process/mechanistic modeling. Remote sensing and GIS will play key roles in spatial analysis, integration as well as cross scale modeling.

关键词： scale issue global change study scaling up integrated approach

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A centromere map based on super pan-genome highlights the structure and function of rice centromeres

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Journal of Integrative Plant Biology 2024年第2期66卷 196-207页

作者： Yang Lv Congcong liu Xiaoxia Li Yueying wang Huiying He Wenchuang He Wu Chen Longbo Yang Xiaofan Dai Xinglan Cao Xiaoman Yu Jiajia liu bin Zhang Hua Wei Hong Zhang Hongge Qian Chuanlin Shi Yue Leng Xiangpei liu mingliang Guo Xianmeng wang Zhipeng Zhang Tianyi wang bintao Zhang Qiang Xu Yan Cui Qianqian Zhang Qiaoling Yuan Noushin Jahan Jie Ma Xiaoming Zheng Yongfeng Zhou Qian Qian Longbiao Guo Lianguang Shang State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Yazhouwan National Laboratory No.8 Huanjin RoadYazhou DistrictSanya City 572024China National Key Facility for Crop Gene resources and Genetic Improvement Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijing 100081China

Rice(Oryza sativa)is a significant crop worldwide with a genome shaped by various evolutionary *** centromeres are crucial for chromosome segregation,and contain some unreported *** to the diverse and complex centromere region,a comprehensive understanding of rice centromere structure and function at the population level is *** constructed a high-quality centromere map based on the rice super pangenome consisting of a 251-accession panel comprising both cultivated and wild species of Asian and African *** showed that rice centromeres have diverse satellite repeat CentO,which vary across chromosomes and subpopulations,reflecting their distinct evolutionary *** also revealed that long terminal repeats(LTRs),especially young Gypsy-type LTRs,are abundant in the peripheral CentO-enriched regions and drive rice centromere expansion and ***,high-quality genome assembly and complete telomere-to-telomere(T2T)reference genome enable us to obtain more centromeric genome information despite mapping and cloning of centromere genes being *** investigated the association between structural variations and gene expression in the rice centromere.A centromere gene,OsMAB,which positively regulates rice tiller number,was further confirmed by expression quantitative trait loci,haplotype analysis and clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein9 *** revealing the new insights into the evolutionary patterns and biological roles of rice centromeres,our finding will facilitate future research on centromere biology and crop improvement.

关键词： centromere super pan-genome CentoO satellite repeat rice

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Modeling the impacts of climate change on china's agriculture

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Journal of geographical sciences 2001年第2期11卷 149-160页

作者： liu Hui~1, LI Xiu-bin~1, Guenther Fischer~2, SUN Lai-xiang~2 (1. institute of geographic sciences and natural resources research, CAS, beijing 100101, china 2. International institute for Applied System Analysis, A-23.1.Laxenburg, Austria) institute of geographic sciences and natural resources research CAS International institute for Applied System Analysis A-2361 Laxenburg Austria

The impacts of climate change on china's agriculture are measured based on Ricardian model. By using county-level cross-sectional data on agricultural net revenue, climate, and other economic and geographical data for 1275 agriculture-dominated counties in the period of 1985-1991, we find that both higher temperature and more precipitation will have overall positive impact on china's agriculture. However, the impacts vary seasonally and regionally. Higher temperature in all seasons except spring increases agricultural net revenue while more precipitation is beneficial in winter but is harmful in summer. Applying the model to five climate scenarios in the 2020s and 2050s shows that the North, the Northeast, the Northwest, and the Qinghai-Tibet Plateau would always benefit from climate change while the South and the Southwest may be negatively affected. For the East and the Central china, most scenarios show that they may benefit from climate change. In conclusion, climate change would be beneficial to the whole china.

关键词： climate change Ricardian model china's agriculture

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The land use and land cover change database and its relative studies in china

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Journal of geographical sciences 2002年第3期12卷 275-282页

作者： liu Jiyuan, liu mingliang, DENG Xiangzheng, ZhuangDafang,ZHANG Zengxiang, LUO Di(1. Inst. of geographic sciences and natural resources research, CAS, beijing 100101, china 2. Inst. of Remote Sensing Applications, CAS, beijing 100101, china) Inst. of geographic sciences and natural resources research CAS Beijing China Inst. of Remote Sensing Applications CAS Beijing China

In the mid-1990s, we established the national operative dynamic information serving systems on natural resources and environment. During building the land-use/land-cover change (LUCC) database for the mid-1990s, 520 scenes of remotely sensed images of Landsat Thematic Mapper (TM) were interpreted into land-use/land-cover categories at scale of 1:100,000 under overall digital software environment after being geo-referenced and ortho-rectified. The vector map of land-use/land-cover in china at the scale of 1:100,000 was recently converted into a 1-km raster database that captures all of the high-resolution land-use information by calculating area percentage for each kind of land use category within every cell. Being designed as an operative dynamic information serving system, monitoring the change in land-use/land-cover at national level was executed. We have completed the updating of LUCC database by comparing the TM data in the mid-1990s with new data sources received during 1999–2000 and 1989–1990. The LUCC database has supported greatly the national LUCC research program in china and some relative studies are incompletely reviewed in this paper.

关键词： land-useAand-cover change database

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遥感影像地学分析的地理学原理及等级斑块建模框架

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遥感学报 2024年第6期28卷 1412-1424页

作者：王志华杨晓梅刘岳明刘彬张俊瑶刘晓亮孟丹郜酷曾晓伟丁亚新中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室北京100101 中国科学院大学北京100049 中国地质大学(武汉)地理与信息工程学院武汉102405 河南理工大学测绘与土地信息工程学院焦作454000

单纯借鉴图像处理、计算机视觉技术,难以从根本上解决遥感地学分析问题。为此,以面向对象影像分析范式为例,剖析区域、尺度、格局与功能的地理学原理,将遥感影像地学分析视为基于遥感影像信息的精细尺度下地理空间区域划分、等级结构表... 详细信息

单纯借鉴图像处理、计算机视觉技术,难以从根本上解决遥感地学分析问题。为此,以面向对象影像分析范式为例,剖析区域、尺度、格局与功能的地理学原理,将遥感影像地学分析视为基于遥感影像信息的精细尺度下地理空间区域划分、等级结构表达、空间结构推断空间功能的过程。在此基础上,提出基于等级斑块建模的循环迭代式遥感影像地学分析框架。该框架,首先由遥感影像与其它地理信息数据和知识共同构建能够表达地理空间的等级斑块模型;然后,依托等级斑块模型的上下层次关系和遥感影像特征,协同实现对象的精准识别;进而,使用精准识别结果更新等级斑块模型,提供更为精准的上下层次关系特征,从而实现后续迭代过程中更高精度的识别。此外,还提出了实现该框架的10条建议,例如为不同地理要素构建不同的等级斑块模型。该框架提供了一种地学知识引导下的遥感大数据智能解译思路,有望实现地学知识自动积累更新和遥感智能解译精度提升的协同互促。

关键词：地理信息科学遥感地学分析面向对象分类遥感智能解译面向地理对象影像分析地学知识图谱对地观测格局尺度区域等级斑块遥感大数据

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面向自然场景土地覆被分类的遥感物候模式分区

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地理学报 2024年第9期79卷 2206-2229页

作者：刘晓亮王志华杨晓梅程维明张俊瑶刘岳明刘彬孟丹曾晓伟中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室北京100101 中国科学院大学北京100049

选取适当地理边界对研究区或影像进行分区,降低区域内土地覆被复杂程度及其在影像中的特征变异性,能够有效提升土地覆被遥感分类的精度和效率。现有土地覆被制图中开展分区分类策略所借助的生态分区等区划数据缺乏目标针对性,其对遥感... 详细信息

选取适当地理边界对研究区或影像进行分区,降低区域内土地覆被复杂程度及其在影像中的特征变异性,能够有效提升土地覆被遥感分类的精度和效率。现有土地覆被制图中开展分区分类策略所借助的生态分区等区划数据缺乏目标针对性,其对遥感分类的适用性范围及精度提升效果仍存在限制。植被物候变化是造成自然场景土地覆被类内光谱异质的主要原因,本文利用遥感观测的反映地表植被绿度状态的植被指数和反映地表植被生长发育节律的关键物候期构建分区指标体系,以反映微地貌形态、坡面属性及地表物质组成的地貌小区为分区单元,采用数据驱动的空间约束层次聚类算法,提出了面向自然场景土地覆被分类的遥感物候模式分区。基于统计检验和多源土地覆被产品的分区评价结果表明,本文的遥感物候模式分区可有效降低区域内土地覆被复杂程度和植被物候变化引起的类内特征异质,在土地覆被代表性样本库构建以及分区分类策略实施等方面具有较高应用潜力。

关键词：物候分区/区划土地覆被分类遥感中国

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Mapping china’s offshore mariculture based on dense time-series optical and radar data

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International Journal of Digital Earth 2022年第1期15卷 1326-1349页

作者： Xiaoliang liu Zhihua wang Xiaomei Yang Yueming liu bin liu Junyao Zhang Ku Gao Dan meng Yaxin Ding State Key Laboratory of resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingPeople’s Republic of China University of chinese academy of sciences BeijingPeople’s Republic of China

Due to the weak information about cultural targets in the complex marine environment,an omission problem exists in large-scale mariculture extraction using single-view and single-source *** overcome this problem,we developed a mariculture extraction method that combines dense time-series Sentinel-2 and Sentinel-1 data.A high-precision chinese mariculture distribution map for 2020 was produced with an overall accuracy of 94.00%and a kappa coefficient of *** results show that(1)the total area of mariculture was 1173249.22 ha on the national scale,which was significantly larger than the previous studies(459595.70 and 205920.28 ha,respectively),with Shandong Province(39.09%)having the largest proportion;(2)china’s mariculture presented a spatial distribution characteristic of‘Denser North and Sparser South’,and mariculture was centralized in the coastal zones of the northern provinces(60.76%)rather than the southern provinces;(3)the official production statistics and remote sensing-derived mariculture area revealed a highly corresponding trend at the provincial level,with an R2 reaching 0.78,which is much higher than the 0.07 and 0.41 values of the comparison *** results directly provide data reference for mariculture production estimation and site selection or ideas for mariculture extraction in other regions and globally.

关键词： Aquaculture mariculture multi-source remote sensing time-series china’s coastal zone

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青藏高原表土磁化率空间分布特征及影响因素

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土壤学报 2024年第2期61卷 361-371页

作者：陈雅敏宋效东刘峰叶明亮张楚张甘霖土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) 南京210008 中国科学院大学北京100049 中国科学院南京地理与湖泊研究所流域地理科学重点实验室南京210008

土壤磁化率是古环境重建的常用代用指标,对表土磁化率与现代环境的关系研究有助于理解磁化率产生差异的原因。当前,区域尺度上土壤磁化率变化成因认识尚不清楚,限制了磁化率作为古环境重建重要代用指标的精准应用。本研究系统调查了青... 详细信息

土壤磁化率是古环境重建的常用代用指标,对表土磁化率与现代环境的关系研究有助于理解磁化率产生差异的原因。当前,区域尺度上土壤磁化率变化成因认识尚不清楚,限制了磁化率作为古环境重建重要代用指标的精准应用。本研究系统调查了青藏高原的254个样点表层(发生层A层)土样,测定土壤磁化率和其他土壤属性,结合母质、气候、地形和植被等数据,阐明青藏高原地区土壤磁化率空间变化特征及其主要影响因素。结果表明:(1)不同母质类型之间,表层土壤磁化率(χ_(lf))无显著差异,百分频率磁化率(χ_(fd)%)差异显著,表现为黄土和砂页岩风化物>冰碛物和结晶盐风化物,其他母质类型之间无显著差异;不同土地利用之间,表层土壤χ_(lf)无显著差异,χ_(fd)%差异显著:森林和旱地>草地>荒地。(2)各因子对土壤磁化率影响表现为植被>理化性质>地形>母质。(3)空间分布上,χ_(lf)与χ_(fd)%均呈现由东南向西北降低的趋势。此外,χ_(lf)和χ_(fd)%的空间分布规律与青藏高原植被分区相吻合。因此,磁化率能更好地指示植被空间分布。

关键词：青藏高原表土磁化率气候

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N-(2-Phenoxy)ethyl imidazo[1,2-a]pyridine-3-carboxamides containing various amine moieties:Design,synthesis and antitubercular activity

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chinese Chemical Letters 2020年第2期31卷 409-412页

作者： Linhu Li Apeng wang bin wang mingliang liu Kai Lv Zeyu Tao Chao Ma Xican Ma bing Han Aoyu wang Yu Lu institute of Medicinal Biotechnology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China Limin Chemical Co. Ltd.Xinyi 221422China beijing Key Laboratory of Drug Resistance Tuberculosis research Department of PharmacologyBeijing Tuberculosis and Thoracic Tumor Research InstituteBeijing Chest HospitalCapital Medical UniversityBeijing 100149China

Seven 2,6-disubstituted N-(2-phenoxy)ethyl imidazo[1,2-a]pyridine-3-carboxamide series containing various amine moieties were designed and synthesized as new anti-TB *** of them show excellent in vitro activity against both drug-sensitive MTB strain H37Rv and two MDR-MTB clinical isolates(MIC:2-0.030 μg/mL).Compounds 2f,5e and 5g display acceptable safety and pharmacokinetic profiles,opening a new direction for further development.

关键词： N-(2-Phenoxy)ethyl imidazo[1,2-α]pyridine Design Synthesis Antimycobacterial activity

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