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Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene

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Science china Earth Sciences 2006年第5期49卷 505-517页

作者： WANG Xianyan1,7, LU Huayu1,2, JI Junfeg3. WANG Xiaoyong1,7, ZHAO Jingbo4, HUANG Baochun5 & LI Zhen6 1. SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, china 2. Department of Urban and Resources Sciences, Nanjing university, Nanjing 210093. china 3. Department of Earth Sciences, Nanjing university, Nanjing 210093. china 4. Department of geography, Shaanxi normal university, Xi’an 710062, china 5. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, china 6 Department of geography, qinghai normal university, xining 810008, china 7. Graduate school of the Chinese Academy of Sciences, Beijing 10003., china 1. SKLLQG Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China 7. Graduate school of the Chinese Academy of Sciences Beijing 100039 China 2. Department of Urban and Resources Sciences Nanjing University Nanjing 210093 China 3. Department of Earth Sciences Nanjing University Nanjing 210093 China 4. Department of geography Shaanxi Normal University Xi’an 710062 China 5. Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 6. Department of geography Qinghai Normal University Xining 810008 China

The Red Earth deposit around xining, northeastern Tibetan Plateau, has beenstudied in terms of soil micro-structure, grain-size distribution, major- and trace-elementchemistry and magne-tostratigraphy. Field investigations indicate that the Red Earth sequenceconsists of 25 visually definable yellow-brown and weakly-developed soils interbedded with reddishstrongly-developed soils, and has a similar structure to the aeolian Red Clay deposit on the ChineseLoess Plateau. Grain-size analysis shows that the Red Earth deposit is very fine-grained with anegligible sand fraction ( > 63.μm). Thin-section observations under light microscopy show that thedeposit has a clayey texture and the coarse fraction ( > 10 μm) mainly consists of quartz,feldspar and micas. Pyroxene and hornblende were also observed. This mineralogical composition ofthe coarse fraction is similar to that of the Quaternary loess. In addition, all of the mineralgrains are semi angular semi-angular and are generally finer than 63.μm. There is a good agreementbetween the major and minor trace element chemistry of loess-soil units and the Red Earth *** REE distributions of the loess-soil and the Red Earth deposit are similar in shape, withenriched LREE and fairly flat HREE profiles and a clear negative Eu anomaly. The geochemicalcharacteristics of the Red Earth deposit are also identical to those of upper continental crust,thus indicating a wind-blown origin. Magnetostratigraphic investigation shows that onset of the RedEarth deposition predates 11.4 Ma BP (13.6 Ma at a nearby site). The distribution of the reportedMiocene aeolian loess at Qin''an of the Loess Plateau is still unknown. Our results indicate thatthis aeolian deposit had extended to the northeastern Tibetan Plateau by at least the middleMiocene. The similarity of the element geochemistry between the Red Earth deposit and the overlyingloess shows that they may have similar sources and dynamic transport system, and may indicate thatthe

关键词： Red Earth deposit, Northeastern Tibetan Plateau, aeolian deposit, aridity of Asia, the middle Miocene.

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Growth characteristics and response to climate change of Larix Miller tree-ring in china

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Science china Earth Sciences 2010年第6期53卷 871-879页

作者： SUN Yu1,4, WANG LiLi1,2,3. CHEN Jin5, DUAN JianPing1,4, SHAO XueMei1,2 & CHEN KeLong6 1 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, china 2 Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, china 3.Institute of Desert and Meteorology, china Meteorological Administration, Urumqi 83.002, china 4 Graduate university of Chinese Academy of Sciences, Beijing 100049, china 5 Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, china 6 school of life and geography Sciences, qinghai normal university, xining 810008, china 1. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China4. Graduate University of Chinese Academy of Sciences Beijing 100049 China2. Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China3. Institute of Desert and Meteorology China Meteorological Administration Urumqi 830002 China5. Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China6. School of Life and Geography Sciences Qinghai Normal University Xining 810008 China

As one of the earliest species used in dendrochronological studies, Larix responds sensitively to climate change. In this study, nine larch species and one variety from eleven sites were collected to study the growth characteristics of tree-ring width using dendrochronological methods. Ten residual tree-ring chronologies were developed to analyze their relationships with regional standardized anomaly series by Pearson’s correlation analysis. The results suggest that most of the chronologies had significantly positive correlations with the mean temperature and mean maximum temperature in May. The spring temperature evidently limited the radial growth of the larch species without precipitation control. The largest mean tree-ring width was found in Himalayan Larch in Jilong, whereas Master Larch in Si’er reflected the smallest mean value. Both species presented little climate information in this study. Chinese, Potanin, and Tibetan larches are significantly correlated with climate change, implying a huge potential for climate history reconstruction. The elevation of the sampling sites appears to be an important condition for tree-ring growth of larches responding to climate factors.

关键词： Larix Miller tree-ring climate change mean temperature in May

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Iron speciation in cherts from the Laobao Formation,South china:Implications for anoxic and ferruginous deep-water conditions

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Science Bulletin 2010年第Z2期 3189-3196页

作者： CHANG HuaJin 1,2,3.CHU XueLei 3.FENG LianJun 3.&HUANG Jing 3.1school of life and geography Sciences,{3. normal university,xining 810008,china 2 Key Laboratory of Tibetan Plateau Environment and Resources,Ministry of Education,xining 810008,china 3.nstitute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,china

Cherts in the Laobao Formation in the Silikou section,South china were deposited in terminal Ediacaran *** speciations of iron in cherts,such as pyrite Fe(FeP),HCl-extractable Fe(FeH),and total Fe(FeT),and their interrelationships,are proxies for distinguishing oxic,anoxic but ferruginous,and sulfidic conditions,which is an effective method for studying the terminal Ediacaran ocean *** chert samples from the Laobao Formation,pyrite concentrations are generally low(6%),degree of pyritization(DOP)ranges from3.,and most of FeT/Al ratios range from 0.55 to 5.87(averaging 1.1).Relatively high content of highly reactive Fe and low content of pyrite indicate a scarcity of H2S and Fe-enriched *** features suggested that the deposition setting of Laobao cherts was anoxic and *** Ediacaran deep-water in the South china Basin was most likely anoxic and ferruginous,which played a key role in the emergence and evolution of early multicellular life.

关键词： cherts iron species paleoenvironment Ediacaran South china

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Demographic history of the Tibetan antelope Pantholops hodgsoni(chiru)

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Journal of Systematics and Evolution 2010年第6期48卷 490-496页

作者： 1,2,3.u-Rong DU 1Song-Chang GUO 4Zhao-Feng WANG 1Hai-Xing CI 1Zhen-Yuan CAI 4Qian ZHANG 1Jian-Ping SU 4Jian-Quan LIU 1(Key Laboratory of Evolution and Adaptation of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,xining 810001,china) 2(Graduate university of the Chinese Academy of Sciences,Beijing 100049,china) 3.school of life and geography Science,qinghai normal university,xining 810008,china) 4(Key Laboratory of Arid and Grassland Ecology,school of life Science,Lanzhou university,Lanzhou 73.000,china) (Key Laboratory of Evolution and Adaptation of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining 810001 China) (Graduate university of the Chinese Academy of Sciences Beijing 100049 China) (school of life and geography Science Qinghai Normal University Xining 810008 China) (Key Laboratory of Arid and Grassland Ecology School of Life Science Lanzhou University Lanzhou 730000 China) *Correspondence: Jian-Ping SU Jian-Quan LIU *Correspondence: ?Authors for correspondence. J-P SU E-mail: sujp@*** Tel.: 86-971-6143.48 J-Q LIU E-mail: liujq@*** Tel.: 86-93.-8914255.[?]?These authors contributed equally to this work.

The Tibetan antelope(chiru,Pantholops hodgsoni),a heavily poached species and symbol of the qinghaiTibetan Plateau(QTP),is noted worldwide for its special calving *** species originated in the early Quaternary and it is interesting to know how the following climatic oscillations affected its demographic dynamics in the climate-sensitive *** this study,we analyzed the mitochondrial D-loop region from 3.2 individuals sampled in all of the six major *** found high rates of gene flow and little genetic differentiation between populations,suggesting that the calving migration may have homogenized the genetic pool of this *** mismatch distribution analyses and coalescent simulations suggested that this species experienced a demographic expansion approximately 600-200 Kyr following the retreat of the large glaciers developed in the QTP at 800-600 Kyr,rather than at the end of the last glacial age,as previously suggested,based on a limited sample *** addition,we found evidence of a chiru population decrease probably related to the human settings at the QTP during the middle Holocene.

关键词： chiru calving migration demographic expansion mitochondrial D-loop Quaternary.

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三江源地区土壤侵蚀特点

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山地学报 2009年第6期27卷 683-687页

作者：吴万贞周强于斌马灿青海师范大学生命与地理科学学院地理科学系

三江源地区地域辽阔,土壤侵蚀复杂多样。近年来土壤侵蚀加剧,生态环境严重退化。以2000年土壤侵蚀调查的数据成果为基数,并与更新后的2005年数据成果比较,进行土壤侵蚀动态变化分析。对三江源地区不同类型土壤侵蚀区的土壤侵蚀现状做了... 详细信息

三江源地区地域辽阔,土壤侵蚀复杂多样。近年来土壤侵蚀加剧,生态环境严重退化。以2000年土壤侵蚀调查的数据成果为基数,并与更新后的2005年数据成果比较,进行土壤侵蚀动态变化分析。对三江源地区不同类型土壤侵蚀区的土壤侵蚀现状做了较全面的分区评价。同时对作为典型区域的黄河源头区12个县的2000年1:10万Landsat5TM假彩色合成影像,通过野外调查建立解译标志来分析该区植被覆盖状况,对该区典型区域的土壤侵蚀现状做了定量评价。根据评价结果,对三江源地区土壤侵蚀的发展趋势做了预测。

关键词：三江源地区土壤侵蚀评价

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Spatial prediction and analysis of Himalayan marmot plague natural epidemic foci in china based on HJ-1 satellite data

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Science china Earth Sciences 2010年第S1期53卷 8-15页

作者： GAO MengXu1,4,LI XiaoWen1,2,CAO ChunXiang1,ZHANG Hao1,LI Qun3.ZHOU Hang3.HE QiSheng1,4,XU Min1,4,ZHAO Jian1,4,ZHENG Sheng1,4 & CHEN Wei1,4 1State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing normal university,Beijing 100101,china 2{3. of geography,Beijing normal university,Beijing 100875,china 3.ffice for Disease Control and Emergency Response,Chinese Center for Disease Control and Prevention,Beijing 102206,china 4Graduate university of Chinese Academy of Sciences,Beijing 100049,china 1. State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China4. Graduate University of Chinese Academy of Sciences Beijing 100049 China2. School of Geography Beijing Normal University Beijing 100875 China3. Office for Disease Control and Emergency Response Chinese Center for Disease Control and Prevention Beijing 102206 China

Plague,caused by the gram-negative bacterium Yersinia pestis,is a serious and rapidly progressing illness in humans that can be fatal if not treated *** qinghai-Tibet Plateau is the largest area of natural Himalayan marmot(Marmota himalayana) plague foci in china and covers more than 63.000 *** County in Gansu Province is a part of this natural focus of plague and was chosen as a study *** study used an ecological niche modeling(ENM) approach to predict the potential distribution of the Himalayan *** and Disaster Monitor Satellite(HJ-1) data was used to investigate environment factors that affect plague host animal *** animal point data from active surveillance was combined with environmental variables from the HJ-1 satellite and other databases,and the models of the potential distribution of Himalayan marmot were produced with the Genetic Algorithm for Rule-Set Production(GARP).The probability of marmot presence was divided into 0-5%,5%-20%,20%-40%,40%-80%,and 80%-100% *** with 80%-100% probability exhibited the greatest potential for the presence of Himalayan *** to the predicted potential distribution of Himalayan marmot in the study area,active surveillance of plague hosts and plague control and prevention could be more efficient.

关键词： Himalayan marmot plague spatial prediction GARP HJ-1 satellite

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茂兰喀斯特森林林隙物种多样性的动态规律

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山地学报 2009年第3期27卷 278-284页

作者：龙翠玲贵州师范大学地理与环境科学学院

分析了茂兰喀斯特森林不同大小和发育阶段林隙物种多样性的动态变化规律。结果表明:林隙中乔木、灌木、草本和藤本植物的多样性指数H′在140～210 m2时最大,随林隙面积的进一步扩大,H′呈下降趋势。乔木、灌木和草本的多样性指数H′在... 详细信息

分析了茂兰喀斯特森林不同大小和发育阶段林隙物种多样性的动态变化规律。结果表明:林隙中乔木、灌木、草本和藤本植物的多样性指数H′在140～210 m2时最大,随林隙面积的进一步扩大,H′呈下降趋势。乔木、灌木和草本的多样性指数H′在林隙形成的20～3. a间达最大值,随林隙年龄的增加而减小。藤本植物的多样性指数H′在林隙形成初期至40 a时逐渐增加,在40 a时达最大值,最大值出现时间较其他生长型滞后。各生长型物种丰富度指数R1和均匀度指数J的变化趋势总体上与物种多样性指数相一致,生态优势度λ值与物种多样性指数几乎相反。乔木和藤本植物的多样性指数随林隙大小和年龄的变化趋势较灌木和草本植物和缓,灌木和草本植物对林隙环境的时空变化最为敏感。

关键词：喀斯特森林林隙动态生长型物种多样性

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Preparation of Mesoporous Carbon by Using Hydroxypropyl-β-cyclodextrin-based Silica andlts Catalytic Activity

Preparation of Mesoporous Carbon by Using Hydroxypropyl-β-c...

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有机合成创新—产业化的新动力——中国化学会全国第三届有机合成化学与过程学术讨论会

作者： Wang,Huichun~(a,b) Li,Baolin~(*,a) Li,Jiangtao~a Lin,Pei~a (a Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, and school of Chemistry and Materials Science,Shaanxi normal university,Xi’ an 710062) (b College of {3. and geography,qinghai normal university,xining 810008)

In the field of catalysis,as catalyst support or protonic acid catalyst by functionalized with certain oxygen-containing functional groups(e.g.,-SOH,and -COOH),the mesoporous carbons(MCs) have attracted considerable attention for their many advantages such as high surface area,large pore volume,well-tailored pore size,chemical inertness,and electrical conducting ***,Few cases of MC directly as catalysts have been reported.

关键词： hydroxypropyl-β-cyclodextrin silica catalytic activity p-nitrotoluene hydrazine hydrate

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川西獐牙菜醇提物对小鼠CCl_4肝损伤的保护作用

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四川中医 2008年第11期26卷 29-30页

作者：罗桂花赵建平陈海娟陈志青海师范大学生命和地理科学学院青藏高原环境与资源教育部重点实验室青海西宁810008

目的:观察川西獐牙菜醇提物对小鼠CCl4肝损伤的保护作用。方法:采用CCl4小鼠急性肝损伤模型,测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)活性、肝组织MDA含量,并观察肝组织病理变化。结果:0.12%CCl40.1mL/10g可使小鼠血清ALT,AST活性和... 详细信息

目的:观察川西獐牙菜醇提物对小鼠CCl4肝损伤的保护作用。方法:采用CCl4小鼠急性肝损伤模型,测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)活性、肝组织MDA含量,并观察肝组织病理变化。结果:0.12%CCl40.1mL/10g可使小鼠血清ALT,AST活性和肝组织MDA含量明显升高(P6.6g/kg)均可使肝损伤小鼠的ALT、AST活性和MDA含量降低(P<0.05)或显著降低(P<0.01);病理学结果显示玉树川西獐牙菜醇提物能显著减轻肝细胞变性和坏死。结论:川西獐牙菜醇提取物有显著的抗肝损伤作用,其作用机制可能与抗脂质过氧化有关。

关键词：玉树川西獐牙菜四氯化碳肝损伤抗氧化

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茂兰喀斯特森林林隙树种更新及其与环境的相关性分析

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山地学报 2007年第6期25卷 684-690页

作者：龙翠玲余世孝贵州师范大学地理与生物科学学院贵州师范大学地理与生物科学学院贵州贵阳550001 中山大学生命科学学院广东广州510275

通过对茂兰喀斯特森林林隙更新状况及林隙环境特征的调查,分析了茂兰喀斯特森林主要树种在不同大小和年龄林隙中的更新密度、无性繁殖特征以及林隙特征、立地条件等因素对树种更新密度的影响。结果表明:不同树种的更新密度随林隙大小的... 详细信息

通过对茂兰喀斯特森林林隙更新状况及林隙环境特征的调查,分析了茂兰喀斯特森林主要树种在不同大小和年龄林隙中的更新密度、无性繁殖特征以及林隙特征、立地条件等因素对树种更新密度的影响。结果表明:不同树种的更新密度随林隙大小的变化因树种的耐荫性强弱而存在差异,表现为耐荫性较强的树种在小面积林隙中更新密度较大,而耐荫性较弱树种在大面积林隙中更新密度较大;主要树种的更新密度随林隙年龄的变化曲线有单峰型和双峰型两种类型,可用多项式进行最好的拟合;大部分树种在林隙中的萌枝率较非林隙中的高,无性繁殖的幼苗数量随林隙面积的增大而增多,随林隙年龄的增大而减少,表明林隙的形成对喀斯特森林的无性繁殖也有显著的促进作用,无性繁殖亦是喀斯特森林的重要更新对策;林隙面积、年龄、枯落物厚度及小生境类型等是林隙树种更新的主要影响因子。

关键词：喀斯特森林林隙更新无性繁殖林隙特征相关性分析

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