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Variability of snail growing season at the Chinese Loess Plateau during the last 75 ka

Chinese Science Bulletin 2012年第9期57卷 1036-1045页

作者： HUANG LinPei wu naiqin GU ZhaoYan CHEN XiaoYun Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Knowledge of seasonal climate change is one of the key issues facing Quaternary paleoclimatic studies and estimating seasonal climate change is difficult,especially changes such as seasonal length on glacial-interglacial *** stable isotope composition from seasonal land snail shells provides the potential to reveal seasonal climatic *** modern land snail species,cold-aridiphilous Pupilla aeoli and thermo-humidiphilous Punctum orphana,were collected from different climatic zones in 18 localities across the Chinese Loess Plateau,spanning 11 degrees of longitude and covering a range of 1000 *** duration of the snail growing season(temperature ≥10℃) was shorter(202 ± 6 d) in the eastern Loess Plateau compared with in the western Loess Plateau(162 ±7 d).The δ13C of *** shells was ?9.1‰ to ?4.7‰ and ?5.0‰ to 0.3‰ for δ*** ***,the δ13C ranged from ?9.1‰ to ?1.9‰ and ?8.9‰ to ?2.9‰ for δ*** the δ13C and δ18O differences between the two snail species were reduced from the east to the western Loess Plateau(2.8‰ to 0.2 ± 1.1‰ for δ13C and 4.7‰ to 2.9 ± 1.3‰ for δ18O).These isotopic differences roughly reflect the difference in the growing season lengths between the east and west Loess Plateau indicating that the duration of the snail growing season shortens by 15 d or 19 d if the difference decreases by 1‰ in δ13C or δ18O,***,the difference in δ13C and δ18O between both snail species can be used to reveal the length of the snail growing season in the *** on our investigation,the length of the snail growing seasons from the Xifeng region during the last 75 ka was *** the mid-Holocene(8-3 ka),the mean isotopic difference from both snail species reached maximum values of 2.6 ± 0.7‰ and 2.1 ± 1.4‰ for δ13C and δ18O,*** was followed by MIS 3 that ranged from 2.5 ± 0.4‰ for δ13C and 1.6 ± 0.8‰ for δ*** Last Glacial Maximum changed by only 0.2‰ and 0.4‰ for δ13C and δ18O,***

关键词：中国黄土高原生长季节季节性蜗牛稳定同位素全新世中期末次盛冰期变异

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Diet control on carbon isotopic composition of land snail shell carbonate

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Chinese Science Bulletin 2007年第3期52卷 388-394页

作者： LIU ZongXiu GU ZhaoYan wu naiqin XU Bing Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Carbon isotope compositions for both the carbonate shells and soft bodies (organic tissue) of living land snails collected mostly from the Loess Plateau, China have been measured. The result shows that δ 13C values range from -13.1‰ to -4.3‰ for the aragonite shell samples and from -26.8‰ to -18.0‰ for the soft body samples. Although the shells are enriched in 13C relative to the bodies averagely by 14.2(±0.8)‰, the shell δ 13Ca values are closely correlated to the body δ 13Corg values, expressed as δ 13Ca = 1.021 δ 13Corg + 14.38 (R = 0.965; N = 31). This relationship indicates that δ 13Ca is primarily a function of the isotopic composition of the snail diets since previous studies have proved that the snail body is the same as their food in carbon isotope composition. In other words, carbon isotope compo-sition of the carbonate shell can be used as a proxy to estimate the dietary 13C abundance of the land snails. The data also support that the 13C enrichment of the carbonate shells results mainly from the equilibrium fractionations between the metabolic CO2, HCO3-in the hemolymph and shell aragonite, and partially from kinetic fractionations when snail shells form during their activity.

关键词：饲料控制蜗牛壳碳酸盐碳同位素成分黄土高原

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Climatic instability recorded by the mollusk assemblages from the late glacial loess deposits in China

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Chinese Science Bulletin 1999年第13期44卷 1238-1242页

作者： naiqin wu D. D. Rousseau Dongsheng Liu Chinese Acad Sci Inst Geol Beijing 100029 Peoples R China Univ Montpellier 2 URA 327 Palynol Lab F-34095 Montpellier 5 France

The loess-paleosol sequence in China records abundant and valuable information on the global and regional climate changes. Biological record from the loess sequence is the most direct evidence on variation in pattern of paleo-atmospheric circulation and changes in winter and summer monsoon. A new record of climatic instability, which occurred in the Loess Plateau during the late glacial period, is presented. Through the study of terrestrial mollusks from three loess sequences, the authors intend to characterize the biological response process to rapid climate change and to learn the mechanisms driving the instable climate changes and the possible linkage in different regions. The result shows the striking consistent variability in the ratio records of three mollusk sequences of the late glacial, indicating apparent rapid climate fluctuations. Correlation of our three mollusk records with the oxygen isotopic records from Greenland ice cores and foraminiferal records from the Northeast Pacific Ocean

关键词： mollusk assemblages loess deposits late glacial period.

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Eco-environmental changes in the Chinese Loess Plateau during low-eccentricity interglacial Marine Isotope Stage 19

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Science China Earth Sciences 2020年第9期63卷 1408-1421页

作者： Yueting ZHANG naiqin wu Fengjiang LI Qingzhen HAO Yajie DONG Dan ZHANG Houyuan LU Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China Center for Excellence in Tibetan Plateau Earth Science Chinese Academy of SciencesBeijing 100101China

Eco-environmental changes during interglacials with an astronomical background similar to that of the Holocene are potentially helpful for understanding the future climatic *** oxygen isotope stage(MIS)19 is similar to the Holocene in astronomical background,both being characterized by a low eccentricity of the Earth’s ***,MIS 19 has attracted research attention only recently and therefore less is known about eco-environmental changes during this interval,especially based on terrestrial *** the Chinese Loess Plateau(CLP),the S7 paleosol can provide valuable terrestrial paleoclimatic and paleoenvironmental record for MIS ***,high-resolution terrestrial snail records from the L8–L7 strata of the Huining,Xifeng and Luochuan sequences in the CLP were analyzed in order to characterize spatio-temporal changes in climate and eco-environment during MIS 20–*** results show that in all three sections the late part of MIS 20 was dominated by abundant cold-aridiphilous mollusc species,indicating that cold and dry climatic conditions prevailed across the entire CLP,under the strong influence of the winter *** mollusc fauna of MIS 19 were dominated by warmth-loving and thermohumidiphilous species that enable the definition of two climatic *** early part of MIS 19(~790–778 ka)was marked by warm and humid conditions,as evidenced by high abundances of warmth-loving and thermo-humidiphilous *** interval was slightly warmer than today and it lasted for^12 *** climate of the later part of MIS 19(~778–761 ka)was more moderate,and increased proportions of cold-aridiphilous and warmth-loving species were *** warmth of this period was similar to that of today,but the climatic fluctuations were *** the early part of MIS 18(~761–745 ka),the Xifeng and Luochuan sections in the eastern CLP still maintained high abundances of warmth-loving and thermo-humidiphilous species,indicating that the moderate climatic

关键词： Chinese loess-paleosol sequences Terrestrial mollusc fossils Low-eccentricity interglacial MIS 19 Climatic and environmental pattern

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The spatial pattern of farming and factors influencing it during the Peiligang culture period in the middle Yellow River valley, China

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Science Bulletin 2017年第23期62卷 1565-1568页

作者： Can Wang Houyuan Lu Wanfa Gu naiqin wu Jianping Zhang Xinxin Zuo Fengjiang Li Daojing Wang Yajie Dong Songzhi Wang Yanfeng Liu Yingjian Bao Yayi Hu Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Center for Excellence in Tibetan Plateau Earth Science Chinese Academy of Sciences Bejijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China Zhengzhou Municipal Institute of Archaeology Zhengzhou 450052 China The School of History and Culture Henan Normal University Xinxiang 453007 China

The Peiligang culture （ca. 7000-5000 cal BC） is the earliest Neo- lithic culture in the middle Yellow River valley and represents the emergence of cereal farming in the region. It has long been considered representative of millet farming, which requires a dry field, a certain amount of rainfall, and minimal crop management, but new records reveal that mixed farming of millet and rice （Oryza so.） took place during this period.

关键词： The spatial pattern farming and factors

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Variability of snail growing season at the Chinese Loess Plateau during the last 75 ka

Variability of snail growing season at the Chinese Loess Pla...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： HUANG LinPei wu naiqin GU ZhaoYan CHEN XiaoYun Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Knowledge of seasonal climate change is one of the key issues facing Quaternary paleoclimatic studies and estimating seasonal climate change is difficult,especially changes such as seasonal length on glacial-mterglacial *** stable isotope composition from seasonal land snail shells provides the potential to reveal seasonal climatic *** modern land snail species, cold-aridiphilous Pupilla aeoli and thermo-humidiphilous Punctum orphana,were collected from different climatic zones in 18 localities across the Chinese Loess Plateau,spanning 11 degrees of longitude and covering a range of 1000 *** duration of the snail growing season(temperature≥10℃) was shorter(202±6 d) in the eastern Loess Plateau compared with in the western Loess Plateau(162±7 d).TheδC of *** shells was -9.1‰to -4.7‰and -5.0‰to 0.3‰forδ*** ***,theδC ranged from -9.1‰to -1.9‰and -8.9‰to -2.9‰forδ*** theδC andδO differences between the two snail species were reduced from the east to the western Loess Plateau(2.8‰to 0.2±l.l‰forδC and 4.7‰to 2.9±1.3‰forδO).These isotopic differences roughly reflect the difference in the growing season lengths between the east and west Loess Plateau indicating that the duration of the snail growing season shortens by 15 d or 19 d if the difference decreases by l‰inδC or S O,respectively. Thus,the difference inδC andδC between both snail species can be used to reveal the length of the snail growing season in the *** on our investigation,the length of the snail growing seasons from the Xifeng region during the last 75 ka was *** the mid-Holocene(8-3 ka),the mean isotopic difference from both snail species reached maximum values of 2.6±0.7‰and 2.1±1 A‰forδC andδC,*** was followed by MIS 3 that ranged from 2.5±0.4‰forδC and 1.6±0.8‰forδ*** Last Glacial Maximum changed by only 0.2‰and 0.4‰forδC andδC,respectively. Therefore,we estimate that the duration of the snail growing seasons to be～200±10 d duri

关键词： land snail stable carbon and oxygen isotopes last glacial snail growing season Xifeng loess sequence

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Time-Transgressive Nature of the Magnetic Susceptibility Record across the Chinese Loess Plateau at the Pleistocene/Holocene Transition

Time-Transgressive Nature of the Magnetic Susceptibility Rec...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Yajie Dong naiqin wu Fengjiang Li Linpei Huang Wenwen Wen Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences University of the Chinese Academy of Sciences Key Laboratory of Plateau Lake Ecology and Global Change College of Tourism and Geography Yunnan Normal University

The loess stratigraphic boundary at the Pleistocene/Holocene transition defined by the magnetic susceptibility(MS) has previously been assumed to be synchronous with the Marine Isotope Stage(MIS) 2/1 boundary, and approximately time-synchronous at different sections across the Chinese Loess Plateau(CLP). However, although this assumption has been used as a basis for proxy-age model of Chinese loess deposits, it has rarely been tested by using absolute dating methods. In this study, we applied a single-aliquot regenerative-dose(SAR) protocol to the 45–63 μm quartz grain-size fraction to derive luminescence ages for the last glacial and Holocene sections of three loess sections on a transect from southeast to northwest across the CLP. Based on the 33 closely spaced optically stimulated luminescence(OSL) samples from the three sections, OSL chronologies were established using a polynomial curve fit at each section. Based on the OSL chronology, the timing of the Pleistocene/Holocene boundary, as defined by rapid changes in MS values, is dated at0.5 ka, 8.5 ka and 7.5 ka in the Yaoxian section, Jingchuan and Huanxian sections respectively. These results are clearly inconsistent with the MIS 2/1 boundary age of 12.05 ka, and therefore we conclude that the automatic correlation of the Pleistocene/Holocene transition, as inferred from the MS record, with the MIS 2/1 boundary is incorrect. The results clearly demonstrate that the marked changes in MS along the southeast to northwest transect are time-transgressive among the different sites, with the timing of significant paleosol development as indicated by the MS record being delayed by 3–4 ka in the northwest compared to the southeast. Our results suggest that this asynchronous paleosol development during the last deglacial was caused by the delayed arrival of the summer monsoon in the northwest CLP compared to the southeast.

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植硅体14C测年研究:过去、现在与未来

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第四纪研究 2019年第1期39卷 59-66页

作者：左昕昕吴乃琴福建师范大学湿润亚热带山地生态国家重点实验室培育基地福建福州350007 福建师范大学地理科学学院福建福州350007 中国科学院地质与地球物理研究所中国科学院新生代地质与环境重点实验室北京100029 中国科学院大学北京100049 中国科学院地球科学研究院北京100029

文章回顾了植硅体14C测年发展的历史,对当前其研究的现状进行了全面的总结和评述,对近年来其研究的争议进行了梳理。植硅体测年研究中存在的问题(如污染和老碳效应等)在其他材料测年过程同样存在,不能基于少量现代植物植硅体测年的异常... 详细信息

文章回顾了植硅体14C测年发展的历史,对当前其研究的现状进行了全面的总结和评述,对近年来其研究的争议进行了梳理。植硅体测年研究中存在的问题(如污染和老碳效应等)在其他材料测年过程同样存在,不能基于少量现代植物植硅体测年的异常数据而完全否定其意义。大量的测年数据显示,并不是所有的植硅体年代都偏老,相反地层中的植硅体年代与同层位其他材料的年代重合或接近。因此,在一些缺少其他有机质测年材料的地层,植硅体14C测年仍然是一种极具潜力的年代学方法,在构建一些重要环境和考古文化时间标尺上将会发挥更重要的作用。

关键词：植硅体放射性碳十四测年植硅体碳

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Palaeoenvironment and agriculture of ancient Loulan and Milan on the Silk Road

Palaeoenvironment and agriculture of ancient Loulan and Mila...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Jianping Zhang Houyuan Lu naiqin wu Xiaoguang Qin Luo Wang Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of Sciences

Ancient Loulan,an important city on the Silk Road,disappeared about 1500 years *** environmental conditions associated with the vicissitude of ancient Loulan have been debated since the city was rediscovered in ad ***,little paleobotanical evidence concerning vegetation and environment in this area has so far been *** this study,phytoliths and diatoms extracted from 16 samples including two fossil camel coprolites from sites of Loulan and Milan indicate that the landscape of ancient Loulan was a typical oasis,where reeds,grasses of Paniceae and Pooideae probably grew along with some ***,some typical brackish diatoms might live in some water bodies in the catchment of an ancient lake,Lop *** results also suggest that common millet as staple crop,and foxtail millet and possibly naked barley as non-staple crops were the main food source for ancient Loulan and Milan residents between ad 50 and 770.

关键词： camel coprolites environment Loulan Milan phytolith vegetation

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黄土高原S_5古土壤形成期的气候环境——陆生蜗牛化石的证据

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第四纪研究 2008年第5期28卷 901-908页

作者：伍斌吴乃琴中国科学院地质与地球物理研究所新生代地质与环境重点实验室北京100029

通过对黄土高原西峰黄土剖面S5古土壤层的蜗牛化石组合研究发现，西峰地区在S5形成时（对应海洋氧同位素MIS 15-13期）气候环境经历了几次显著的波动。MIS15期地层中绝大多数蜗牛壳体被溶蚀，气候非常暖湿，夏季风强盛；MIS14是个弱冰... 详细信息

通过对黄土高原西峰黄土剖面S5古土壤层的蜗牛化石组合研究发现，西峰地区在S5形成时（对应海洋氧同位素MIS 15-13期）气候环境经历了几次显著的波动。MIS15期地层中绝大多数蜗牛壳体被溶蚀，气候非常暖湿，夏季风强盛；MIS14是个弱冰期，蜗牛组合显示气候以凉湿为主，仍然有较强的夏季风影响；MIS13期以暖湿的气候为主，夏季风增强。对温湿蜗牛种类冠状砂螺（Gastrocoptacoreana）含量变化的功率谱分析显示出明显的23ka周期，表明岁差轨道驱动的低纬太阳辐射是控制黄土高原夏季风变化的主导因素；冷干种类杂色虹蛹螺（Pupilla aeoli）含量变化具有明显的100ka和弱的43ka周期，说明即使在气候特征总体暖湿的背景下，冬季风仍具有以全球冰量（100ka）为主导周期的变化特征。在海洋和冰芯记录中MIS13和MIS15时期并不是最温暖的间冰期，但在黄土高原受到强夏季风的持续影响，这可能与此时北半球夏季太阳辐射量的增强和北大西洋深层流强度的加强有关。S5中SS1与S5SS3两层强烈发育的古土壤可能有着不同的发育机制，S5SS1因其较发育的母质、超长的成壤期，形成了比S5SS3更强的成壤特征。分析认为全球冰量与轨道驱动的北半球太阳辐射对MIS15～13时期黄土高原气候环境的演替和冬、夏季风的消长起了主导作用。

关键词：西峰S5 古土壤蜗牛化石古环境太阳辐射

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