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Decadal shifts in Qingzang Plateau lake carbon dynamics (1970-2020): From predominant carbon sources to emerging sinks

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Environmental science and Ecotechnology 2024年第5期21卷 123-132页

作者： Di Shen Yu Li Yafeng wang Shouliang Huo Yong Liu Junjie Jia Shuoyue wang Kun Sun yang gao college of Earth and Environment science Lanzhou UniversityLanzhou730000PR China State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing100101PR China Chinese Research Academy of Environmental sciences Beijing100012PR China college of Environmental sciences and Engineering Peking UniversityBeijing1008714PR China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101PR China college of Resources and Environment University of Chinese Academy of SciencesBeijing100049PR China

The evasion of carbon dioxide(CO_(2))from lakes significantly influences the global carbon *** global climatic transformations,the role of Qingzang Plateau(QZP)lakes as carbon(C)sources or sinks remains a subject of ***,accurately quantifying their contribution to the global carbon budget presents a formidable ***,spanning half a century(1970e2020),we utilize a synthesis of literature and empirical field data to assess the CO_(2) exchange flux of QZP *** find markedly higher CO_(2) exchange flux in the southeast lakes than that in the northern and western regions from 1970 to *** this time,both freshwater and saltwater lakes served primarily as carbon *** annual CO_(2) exchange flux was estimated at 2.04±0.37 Tg(Tg)C yr1,mainly influenced by temperature *** CO_(2) exchange flux patterns underwent a geographical inversion between 2000 and 2020,with increased levels in the west and decreased levels in the ***,CO_(2) emissions from freshwater lakes diminished,and certain saltwater lakes in the QTP transitioned from carbon sources to *** 2000 to 2020,the annual CO_(2) exchange flux from QZP lakes is estimated at 1.34±0.50 Tg C yr1,with solar radiation playing a more pronounced role in carbon ***,over the past five decades,QZP lakes have generally functioned as carbon ***,the total annual CO_(2) emissions have declined since the year 2000,indicating a potential shift trend from being a carbon source to a sink,mirroring broader patterns of global climate *** findings not only augment our understanding of the carbon cycle in plateau aquatic systems but also provide crucial data for refining china's carbon budget.

关键词： Carbon source Carbon sink Carbon exchange flux Qingzang Plateau Global climate change

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Increased long-distance and homo-trans interactions related to H3K27me3 in Arabidopsis hybrids

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Journal of Integrative Plant Biology 2024年第2期66卷 208-227页

作者： Zhaoxu gao Yanning Su Le Chang Guanzhong Jiao yang Ou Mei yang Chao Xu Pengtao Liu Zejia wang Zewen Qi Wenwen Liu Linhua Sun Guangming He Xing wang Deng Hang He School of Advanced Agriculture sciences and School of Life sciences State Key Laboratory of Protein and Plant Gene ResearchPeking UniversityBeijing 100871China college of Grassland science Beijing Forestry UniversityBeijing 100083China Peking university Institute of Advanced agricultural sciences Shandong Laboratory of Advanced Agricultural Sciences in WeifangWeifang 261325China

In plants,the genome structure of hybrids changes compared with their parents,but the effects of these changes in hybrids remain *** reciprocal crosses between Col×C24 and C24×Col in Arabidopsis using high-throughput chromosome conformation capture assay(Hi-C)analysis,we found that hybrid three-dimensional(3D)chromatin organization had more long-distance interactions relative to parents,and this was mainly located in promoter regions and enriched in genes with heterosis-related *** interactions between euchromatin and heterochromatin were increased,and the compartment strength decreased in *** compartment domain(CD)boundaries,the distal interactions were more in hybrids than their *** the hybrids of CURLY LEAF(clf)mutants clfCol×clfC24and clfC24×clfCol,the heterosis phenotype was damaged,and the long-distance interactions in hybrids were fewer than in their parents with lower ***-seq data revealed higher levels of H3K27me3 in the region adjacent to the CD boundary and the same interactional homo-trans sites in the wild-type(WT)hybrids,which may have led to more long-distance *** addition,the differentially expressed genes(DEGs)located in the boundaries of CDs and loop regions changed obviously in WT,and the functional enrichment for DEGs was different between WT and clf in the longdistance interactions and loop *** findings may therefore propose a new epigenetic explanation of heterosis in the Arabidopsis hybrids and provide new insights into crop breeding and yield increase.

关键词： 3D chromatin organization H3K27me3 homo-trans hybrids long-distanceinteractions

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Analysis of china’s Water Security and Virtual Water Trade

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Chinese Journal of Population,Resources and Environment 2006年第4期4卷 18-23页

作者： wang Hongrui1,2,Liu Xinghan3,Dong Yanyan1,2,wang Junhong1,2 1.college of Water sciences,beijing Normal university,beijing 100875,china 2.Key Laboratory for Water and Sediment sciences Ministry of Education,beijing 100875,china 3.college of Economics&Management,beijing university of Technology,beijing 100022,china college of Water sciences Beijing Normal University Beijing 100875 China Key Laboratory for Water and Sediment sciences Ministry of Education Beijing 100875 China college of Economics & Management Beijing University of Technology Beijing 100022 China College of Water Sciences Beijing Normal University Beijing 100875 China Key Laboratory for Water and Sediment sciences Ministry of Education Beijing 100875 China college of Water sciences Beijing Normal University Beijing 100875 China Key Laboratory for Water and Sediment sciences Ministry of Education Beijing 100875 China

Producing goods and services all needs water *** water used in the process of an agricultural or industrial product is called the"Virtual Water"contained in this product. Through international trade,water-scarce countries and regions could purchase water-intensive products--especially foods,from water-rich countries to balance their water deficits and achieve water *** is one of the 13 most water-deficit countries whose water safety have been severely *** paper generalized the recent global research development and made a brief introduction about the methods calculating virtual water content in specific *** a case study,we qualified china's annual virtual water flows from year 2000 to 2002 with trade in crops,and ended with some policy advice for application and practice of virtual water strategy.

关键词： water security virtual water virtual water trade crops

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Development of EST-SSR primers and their practicability test for Laminaria

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Acta Oceanologica Sinica 2011年第3期30卷 112-117页

作者： wang Guoliang TAN Xiaolong SHEN Junling LI Jian ZHANG Lei SUN Jianwei wang Bin WENG Manli LIU Tao college of Marine Life science Ocean University of China Qingdao 266003 China Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China college of Horticulture Qingdao Agricultural University Qingdao 266109 China

Laminaria （Saccharina） is one of the economic important seaweeds. Through sequence analysis of 4 099 ESTs from Laminaria （971 were generated from our own cDNA laboratories and 3 128 were downloaded from updated EST databases） with SSRIT software, two hundred and fifty-four SSRs in 206 ESTs were found. From the 254 SSRs, sixty-three SSR primer-pairs were designed. In order to test their practicability, the 63 primer-pairs were tested in commonly used SSR reaction conditions using 12 Laminara DNA samples as templates. The results show that 23 SSR primer-pairs gave good amplification patterns on most （more than 80%） of the 12 Laminara DNA templates. Genetic diversity study of 12 Laminaria lines, which were widely used in breeding and economic cultivation in china, was performed based on the obtained SSR data.

关键词： Laminaria EST-SSRs germplasm identification polymorphism analysis

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Carbon isotope ratios of C_(4) plants in loess areas of North china

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science china Earth sciences 2006年第1期49卷 97-102页

作者： wang Guoan1,2,3, HAN Jiamao 2, ZHOU Liping3, XIONG Xiaogang4, TAN Ming2, WU Zhenhai5 & PENG Jun6 1. Department of Plant Nutrition, china agricultural university, beijing 100094, china 2. Institute of Geology and Geophysics, Chinese Academy of sciences, beijing 100029, china 3. college of Environmental sciences, MOE Laboratory for Earth Surface Processes, Peking university, beijing 100871, china 4. Institute of Botany, Chinese Academy of sciences, beijing 100093, china 5. Northwest Sci-Tech university of Agriculture and Forestry, yangling 712100, china 6. Network Center, china agricultural university, beijing 100094, china Department of Plant Nutrition China Agricultural University Beijing China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China college of Environmental sciences MOE Laboratory for Earth Surface Processes Peking University Beijing China Institute of Botany Chinese Academy of Sciences Beijing China Northwest Sci-Tech university of Agriculture and Forestry Yangling China Network Center China Agricultural University Beijing China

Carbon isotope ratios (δ^(13)C) of 89 C_4 plant samples were determined fromthe loess area in North china. δ^(13)C values vary between -10.5per thousand and -14.6per thousandwith a mean of -12.6per thousand. Along a precipitation gradient from the semi-moist area to thesemiarid area, then to the arid area, the δ^(13)C values of C_4 plants show a slight decreasingtrend. The δ^(13)C values of C_4 plants in the dry season are found lower than those in the wetseason. These trends are opposite to those observed for C_3 species.

关键词： C4 plants, carbon isotope ratios, loess area.

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Boosting the zinc storage performance of vanadium dioxide by integrated morphology engineering and carbon nanotube conductive networks

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Nano Research 2024年第8期17卷 7136-7143页

作者： Lijie Ma Xiaolin wang Xiang Chen Jianbin gao Yiwen wang Yuehai Song Yaran Zhao Shizhe gao Lin Li Jianchao Sun School of Environment and Material Engineering Yantai UniversityYantai 264005China college of Textile science and Engineering(International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou 310018China BNU-HKUST Laboratory of Green Innovation Advanced Institute of Natural SciencesBeijing Normal UniversityZhuhai 519087China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Vanadium dioxide(VO_(2)) with the advantages of high theoretical capacity and tunnel structure has attracted considerable promising candidates for aqueous zinc-ion ***,the intrinsic low electronic conductivity of VO_(2) results in an unsatisfactory electrochemical ***,a flower-like VO_(2)/carbon nanotubes(CNTs)composite was obtained by a facile hydrothermal *** unique flower-like morphology shortens the ion transport length and facilitates electrolyte ***,the CNT conductive networks is in favor of fast electron transfer.A highly reversible zinc storage mechanism was revealed by ex-situ X-ray diffraction and X-ray photoelectron *** a result,the VO_(2)/CNTs cathode exhibits a high reversible capacity(410 mAh·g^(−1)),superior rate performance(305 mAh·g^(−1)at 5 A·g^(−1)),and excellent cycling stability(a reversible capacity of 221 mAh·g^(−1)was maintained even after 2000 cycles).This work provides a guide for the design of high-performance cathode materials for aqueous zinc metal batteries.

关键词： VO_(2)/carbon nanotubes morphology engineering zinc metal batteries cathode materials conductive networks

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Comparison of the influence factors on NDVI for CCD camera and WFI imager on CBERS-02

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science china(Technological sciences) 2005年第S2期48卷 100-115页

作者： YU Tao1,3, LI Xiaoying1,2,3, ZHANG Yong1,2,3, ZHAO Feng1,2,3, GU Xingfa1,3,4, ZHU Li1,2,3, wang Pengxin5 & MIN Xiangjun6 1. State Key Laboratory of Remote Sensing science Institute of Remote Sensing Application, CAS, Bei- jing 100101, china 2. Graduate university of Chinese Academy of sciences, beijing 100039, china 3. The Center for National Spaceborne Demonstration, beijing 100101, china 4. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 5. college of Information and Electrical Engineering, china agricultural university, beijing 100083, china 6. china Center for Resource Satellite Data and Application, beijing 100830, china State Key Laboratory of Remote Sensing science Institute of Remote Sensing Application CAS Beijing 100101 China Center for National Spaceborne Demonstration Beijing 100101 China Graduate university Chinese Academy of Sciences Beijing 100039 China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France college of Information and Electrical Engineering China Agricultural University Beijing 100083 China china Center for Resource Satellite Data and Application Beijing 100830 China

CCD and WFI are payloads in the visible light and near infrared bands on CBERS satellites and they have not been applied widely, especially WFI. This article mainly probes into the potential of these two sensors’ application in the vegetation monitoring and analyses the influences of radiometric calibration, atmosphere conditions and sun-observing geometry, etc. on NDVI obtained from these two sensors respectively. In addition it analyses the effect of the spectral response difference of red and near infrared spectral bands in CCD and WFI sensors on NDVI. Results indicate that radiometric calibration is the most important factor on NDVI, which cannot be applied to vegetation monitoring without radiometric calibration. Results also demonstrate that near surface NDVI is different greatly from that of TOA which change with atmosphere conditions. The study shows that NDVI is also affected by the non-lambertian character of surface and the change of the atmospheric path with the observing geometry. And NDVI of WFI is higher than that of CCD. They are very different because of their spectral difference, but they have a good linear relevant relationship.

关键词： CCD WFI NDVI LAI.

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Invasive mechanism and control strategy of Ageratina adenophora (Sprengel)

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science china(Life sciences) 2010年第11期53卷 1291-1298页

作者： WAN FangHao1, LIU WanXue1, GUO JianYing1, QIANG Sheng2, LI BaoPing2, wang JinJun3, yang GuoQing1, NIU HongBang1, GUI FuRong1, HUANG WenKun1, JIANG ZhiLin1 & wang WenQi3 1State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of agricultural sciences, beijing 100193, china 2college of Plant Protection, Nanjing agricultural university, Nanjing 210095, china 3Key Laboratory of Entomology and Pest Control Engineering, college of Plant Protection, Southwest university, Chongqing 400716, china State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China college of Plant Protection Nanjing Agricultural University Nanjing China Key Laboratory of Entomology and Pest Control Engineering College of Plant Protection Southwest University Chongqing China

In order to ascertain the invasive mechanism and control strategy of the invasive Crofton weed, Ageratina adenophora, its ecological adaptability and population differentiation,the formation of single dominant population, displacement of native plants and sustainable management strategies were investigated. The present results helped to clarify and explain such issues as the adaptability post invasion,interaction and competition between inter-and intra-species and community resistance, thereby providing important references to researches on other invasive alien species.

关键词： Ageratina adenophora invasive mechanism genetic diversity ecological adaptation allelopathy feedback of soil biota competitive displacement

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Analysis of the essential DNA region for OsEBP-89 promoter in response to methyl jasmonic acid

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science china(Life sciences) 2008年第3期51卷 280-285页

作者： LI Ang1,2, CHEN LiangLiang1,3, REN HaiYun3, wang XueChen2, ZHANG HaiWen1,4 & HUANG Rong- Feng1,4 1 Biotechnology Research Institute, Chinese Academy of agricultural sciences, beijing 100081, china 2 National Laboratory of Plant Physiology and Biochemistry, college of Biological sciences, china agricultural university, beijing 100094, china 3 college of Life sciences, beijing Normal university, beijing 100875, china 4 National Key Facility of Crop Gene Resources and Genetic Improvement, beijing 100081, china Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing China National Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing China college of Life sciences Beijing Normal University Beijing China National Key Facility of Crop Gene Resources and Genetic Improvement Beijing China

In rice, the characterization of OsEBP-89 is inducible by various stress- or hormone-stimuli, including ethylene, abscisic acid (ABA), jasmonate acid (JA), drought and cold. Here, we report the investigation of essential DNA region within OsEBP-89 promoter for methyl jasmonic acid (MeJA) induction. PLACE analysis indicates that this promoter sequence contains multiple potential elements in response to various stimuli. First, we fused this promoter with GUS gene and analyzed its expression under MeJA treatment through Agrobacterium infiltration mediating transient expression in tobacco leaves. Our results revealed that this chimeric gene could be inducible by MeJA in tobacco leaves. To further de- termine the crucial sequences responsible for MeJA induction, we generated a series of deletion pro- moters which were fused with GUS reporter gene respectively. The results of transient expression of GUS gene driven by these mutant promoters show that the essential region for MeJA induction is po- sitioned in the region between -1200 and -800 in OsEBP-89 promoter containing a G-box (?1127), which is distinct from the essential region containing ERE (?562) for ACC induction. In all, our finding is helpful in understanding the molecular mechanism of OsEBP-89 expression under different stimuli.

关键词： OsEBP-89 essential DNA region methyl jasmonic acid transient assay promoter tobacco leaves

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Regression Analysis on the Causes of the International Gold Prices Rising

Regression Analysis on the Causes of the International Gold ...

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第三届教学管理与课程建设学术会议

作者： Xiaoxue wang 1 , Zhiqiang Luan 2 1 International college beijing, china agricultural university, beijing, china, 100083 2 : International college beijing, china agricultural university, beijing, china, 100083

Gold has experienced appreciation for nine years since 2001. This paper analyzes the causes of the international gold price rise. From the data of gold prices for recent years, the causes are summaried: political cause and economic causes which include the price of the silver, the price of oil, S&P500 (stock market), inflation of the U.S. and the federal interest rate. And illustrate what different with widely accepted outcomes of the relationships with the trend of dollar exchange rate, supply of gold.

关键词： gold price regression model dummy variable financial analysis

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