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Climate Reconstruction based on pollen analysis in Inner Mongolia, North China from 51.9 to 30.6 kaBP

Acta Geologica Sinica(English Edition) 2013年第5期87卷 1444-1459页

作者： LI Suping David K.FERGUSON WANG Yong LI Jinfeng YAO Jianxin Key Laboratory of Stratigraphy and Palaeontology Institute of Geology Chinese Academy of Geological Sciences Institute of Palaeontology University of Vienna State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences

The palynomorph assemblage of lake sediments younger than 51.9 kaBP from Wulagai Gobi in Inner Mongolia was analyzed to reconstruct the vegetation and climate. From 51.9 to 30.6 kaBP, the vegetation was arid to semi-arid grassland with only slight changes. According to the palynomorphs, trees and shrubs were very rare. The large number and diversity of algae indicate the presence of a lake. Quantitative climatic conditions were reconstructed using the Best Analogues Method. The results indicate that the annual mean temperature was higher than that at present. The combination of temperature and annual precipitation suggests a change in the climate from cool dry to warm dry and then cool humid. Our results show that the annual precipitation values were mostly higher than that at present but were lower than 400 mm. It infers that the study area was already within the arid to semi-arid regions but with a stronger influence of the summer monsoon during 51.9 to 30.6 kaBP than at present. With slight differences mainly in time scale, the changing trend of the annual temperature curve is consistent with the other climatic records from Antarctica, Greenland, Hulu Cave （East China）, and the Tibetan Plateau during the last glacial period. From 30.6 kaBP to present, very few palynomorphs were detected in the samples. Hence, no information about the vegetation and climate could be extracted. Combined with other studies during Late Pleistocene, we presume that the reason for the lack of pollen during this period was caused by an abrupt temperature fall after 30.6 kaBP or that the lacustrine conditions were unsuitable for pollen deposition. It was probably incurred by the oxidation on land prior to deposition. But for those samples only with algae, it might be caused by the fact that algae could finish their life history in a very short time in a seasonal lake.

关键词： paleoclimate paleovegetation pollen analysis Late Pleistocene Inner Mongolia

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Palaeoenvironmental Changes on the South-eastern Margin of the Tibetan Plateau:a pollen-data Based analysis

Palaeoenvironmental Changes on the South-eastern Margin of t...

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Asian Conference on Permafrost

作者： Annette Kramer Ulrike Herzschuh Steffen Mischke Alfred Wegener Institute for Polar and Marine Research Freie Universitaet Berlin Institute of Geological Sciences

An 18 m long sediment core from Lake Naleng in the south-eastern part of the Qinghai-Xizang Plateau(present-day precipitation:800mm) was examined to reconstruct the vegetation and climate history of the region,considering the composition of fossil *** retrace precipitation patterns quantitatively,a pollen-precipitation transfer function was *** region is influenced by the Indian Monsoon;a shift in the intensity of the monsoon circulation is therefore *** age of the core base was determinate by means of AMS-Dating to 16.5 ka cal *** from qualitative and quantitative analysis show a periglacial vegetation,composed of alpine cushion plants and species which indicate perturbed conditions,for the beginning of the Late *** reconstructed precipitation shows an annual amount of ca.300-400 *** conditions stabilised and alpine meadows established around the lake during the later Late *** Pleistocene/Holocene transition is marked by a rise of arboreal pollen(mainly Abies and Betula).Forests were reconstructed for the first half of the Holocene,pointing to an enhanced summer monsoon for this period with annual rainfall of about 800 *** increase in alpine herb and shrub taxa and a decrease of arboreal taxa during the Late Holocene indicate a decrease of the forest vegetation in the area.

关键词： Tibetan Plateau pollen analysis palaeoclimate transfer-functions Monsoon

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The LGM refugia of deciduous oak and distribution development since the LGM in China

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Science China Earth Sciences 2023年第1期66卷 80-91页

作者： Qian HAO Hongyan LIU Ying CHENG Zhaoliang SONG Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China School of Geography and Tourism Shaanxi Normal UniversityXi’an 710119China

The distribution development of oak has significant effects on ecosystems and ***-term forest distribution studies can help to better understand the vegetation dynamics under climate change or human activities in the *** this study,we integrated different methods(i.e.,palaeoecology,phylogeography,and species distribution models)to investigate the likely locations of glacial refugia and the postglacial development of the main deciduous oak species(i.e.,Quercus variabilis,***,***,***,*** and ***).The results indicated that mountains such as the Changbai,Qinling,and Dabie Mountains acted as the refugia in northern and central China during the Last Glacial Maximum(LGM).The present Quercus in northern China could be the result of local dispersal during the postglacial period rather than only that of long-distance migration from south to *** was the main influencing factor for oak migration,while human activities did not show much influence on this widespread *** topography acted as a buffer and made the mountains act as refugia under a deteriorated *** with other main tree genera(e.g.,Pinus and Betula),the refugia locations and migration routes of deciduous oak species were different because of their physiological *** individual migration dynamics of these three genera need to be considered when modelling their dynamics.

关键词： Quercus pollen analysis Species distribution model Chloroplast DNA Precipitation

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Vegetation dynamics and its response to climate change during the past 2000 years in the Altai Mountains,northwestern China

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Frontiers of Earth Science 2022年第2期16卷 513-522页

作者： Dongliang ZHANG Yunpeng YANG Min RAN Bo LAN Hongyan ZHAO Qi LIU State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China College of Environment and Planning Henan UniversityKaifeng 475004China Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions(Ministry of Education) Henan UniversityKaifeng 475004China School of Environmental and Chemical Engineering Chongqing Three Gorges UniversityChongqing 404000China School of Earth Science Northeast Normal UniversityChangchun 130024China College of Resource and Environmental Sciences Xinjiang UniversityUrumqi 830046China

Over the past 2000 years,a high-resolution pollen record from the Yushenkule Peat(46°45′-46°57′N,90°46′-90°61′E,2374 m a.s.l.)in the south-eastern Altai Mountains of northwestern China has been used to explore the changes in vegetation and *** regional vegetation has been dominated by alpine meadows revealed from pollen diagrams over the past 2000 *** pollen-based climate was warm and wet during the Roman Warm Period(0-520 AD),cold and wet during the Dark Age Cold Period(520-900 AD),warm and wet during the Medieval Warm Period(900-1300 AD),and cold and dry during the Little Ice Age(1300-1850 AD).Combined with other pollen data from the Altai Mountains,we found that the percentage of arboreal pollen showed a reduced trend along the NW-SE gradient with decreasing moisture and increasing climatic continentality of the Altai Mountains over the past 2000 years;this is consistent with modern distributions of taiga *** also found that the taiga(Pinus forest)have spread slightly,while the steppe(Artemisia,Poaceae and Chenopodiaceae)have recovered significantly in the Altai Mountains over the past 2000 *** addition,the relatively warm-wet climate may promote high grassland productivity and southward expansion of steppe,which favors the formation of Mongol political and military power.

关键词： pollen analysis vegetation dynamics past 2000 years Altai mountains northwestern China

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Landscape distribution of food and nesting sites affect larval diet and nest size, but not abundance of Osmia bicornis

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Insect Science 2016年第5期23卷 746-753页

作者： Valerie Coudrain Sarah Rittiner Felix Herzog Willy Tinner Martin H. Entling Research Station ART Zurich CH-8046 Switzerland Institute of Ecology and Evolution University of Bern Bern CH-3012 Switzerland Institute for Environmental Sciences University of Koblenz-Landau LandaulPfalz D-76829 Germany Institute of Plant Sciences and Oeschger Centre for Climate Change Research University of Bern Bern CH-3013 Switzerland

Habitat fragmentation is a major threat for beneficial organisms and the ecosys- tem services they provide. Multiple-habitat users such as wild bees depend on both nesting and foraging habitat. Thus, they may be affected by the fragmentation of at least two habitat types. We investigated the effects of landscape-scale amount of and patch isolation from both nesting habitat （woody plants） and foraging habitat （specific pollen sources） on the abundance and diet of Osmia bicornis L. Trap-nests of O. bicornis were studied in 30 agricultural landscapes of the Swiss Plateau. Nesting and foraging habitats were mapped in a radius of 500 m around the sites. pollen composition of larval diet changed as isolation to the main pollen source, Ranunculus, increased, suggesting that （9. bicornis adapted its foraging strategy in function of the nest proximity to main pollen sources. Abundance of O. bicornis was neither related to isolation or amount of nesting habitat nor to isolation or abundance of food plants. Surprisingly, nests ofO. bicornis contained fewer larvae in sites at forest edge compared to isolated sites, possibly due to higher parasitism risk. This study indicates that O. bicornis can nest in a variety of situations by compensating scarcity of its main larval food by exploiting alternative food sources.

关键词： diet fragmentation habitat amount habitat isolation Hymenoptera Megachilidae pollen analysis

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Vegetation Changes and Human Influences on Qian’an Basin Since the Middle Holocene

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Acta Botanica Sinica 2002年第5期44卷 611-616页

作者：许清海孔昭宸阳小兰梁文栋孙黎明中国科学院植物研究所北京100093 河北省科学院地理研究所石家庄050011 中国科学院地质与地球物理研究所北京100029 石家庄经济学院石家庄050031

Vegetation changes and human influences on natural environments since 5 000 a BP were discussed based on the pollen data supported by radiocarbon dating from Cangumiao and Yujiawa profiles in Qian'an Basin, the southern area of Yanshan Mountain. The research indicates that (1) from 4 600 to 3 100 a BP, deciduous broad_leaved forests dominated by Quercus grew in the Basin, (2) after 3 100 a BP, broad_leaved species reduced and Pinus increased, in response to the cooling climate, (3) since 1 600 a BP, forests had been destroyed seriously due to the increase of agricultural activities, and (4) pollen analysis showed that Castanea trees had been cultivated for 1 600 years, and Oryza had been planted for 700 years in Qian'an Basin.

关键词： Qian'an Basin pollen analysis human activities

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Vegetation dynamics and climate variability over the past 2000 years inferred from Son Kul marsh in the western Tianshan Mountains

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Journal of Mountain Science 2021年第5期18卷 1246-1255页

作者： ZHANG Dong-liang LI Yao-ming LI Kai-hui MA Xue-xi YANG Yun-peng State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi 830011China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China College of Environment and Planning Henan UniversityKaifeng 475004China Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions(Ministry of Education) Henan UniversityKaifeng 475004China

A pollen study was conducted on an alpine marsh sediment in the Son Kul Basin and was allowed to reconstruct changes in vegetation dynamics and climatic information in the western Tianshan Mountains during the past 2000 *** diagram reveals that regional vegetation is dominated by alpine meadow in the past 2000 years,being similar with modern vegetation components in the *** Artemisia/Chenopodiaceae-indicated moisture exhibits a warm-dry Roman Warm Period(RWP,~0-~500 AD),a cold-dry Dark Ages Cold Period(DACP,~500-~800 AD),a warm-wet Medieval Warm Period(MWP,~800-~1350 AD),a cold-dry Little Ice Age(LIA,~1350-~1850 AD)and a warm-dry Current Warm Period(CWP,since~1850 AD).Our pollen-based moisture reconstructions are supported by other nearby moisture *** with other pollen data in the western Tianshan Mountains,we found that the vegetation was relatively stable before~1650-~1750 AD and the anthropogenic activities obviously intensified afterwards(especially at the middle-elevation sites).Further work involving more and higher-resolution palaeovegetation records would contribute to fully understand the information on the complex links between environmental,climatic and anthropogenic changes in the western Tianshan Mountains.

关键词： pollen analysis Past 2000 years Son Kul marsh Kyrgyzstan Central Asia

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pollen and Phytolith Analyses of Ancient Paddy Fields at Chuodun Site, the Yangtze River Delta

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Pedosphere 2007年第2期17卷 209-218页

作者： LI Chun-Hai ZHANG Gang-Ya YANG Lin-Zhang LIN Xian-Gui HU Zheng-Yi DONG Yuan-Hua CAO Zhi-Hong ZHENG Yun-Fei DING Jin-Long Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 （China） Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China） Zhejiang Provincial Institute of Cultural Relics and Archaeology Hangzhou 310014 （China） Suzhou Museum Suzhou 215001 （China）

A number of paddy fields pertaining to the Majiabang Cultures (5500-3800 years BC) were discovered during the archaeological excavations that were carried out since 1998 at the Chuodun site in the Yangtze River Delta. The pollen and phytolith analyses of two soil profiles from the northeastern part of this site were carried out to trace the agricultural practices of the Neolithic period. The phytolith results showed that rice domestication in the Yangtze River Delta could be traced back to as early as the Majiabang Culture. The pollen assemblage also revealed low levels of aquatic species, similar to that in modern paddy fields. This finding suggested that humans might have removed weeds for rice cultivation during the Neolithic period. Thus, pollen analysis in association with phytolith analysis was a promising method for identifying ancient paddy fields.

关键词： ancient paddy fields Neolithic period pollen analysis phytolith analysis Yangtze River Delta

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pollen Assemblage Features of Modern Water Samples from the Shiyang River Drainage, Arid Region of China

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Acta Botanica Sinica 2002年第3期44卷 367-372页

作者：朱艳陈发虎程波张家武 David B.MADSEN 兰州大学西部环境教育部重点实验室西北师范大学地理与环境科学学院兰州730070 兰州大学干旱农业国家重点实验室兰州730000 Uath Geological Survey SaltLake CityUath 84114USA

pollen analysis of 30 modem water samples from the Shivang River, an internal river system located between the Tengger and Badain Jaran deserts, Northwest China was carried out to examine the river's capacity to carry pollen and spores, and to assess the contribution of the water-borne pollen to pollen assemblages in lake sediments at the end of the river system. Results indicate the pollen assemblages in water samples consist of both local and upland pollen. Percentages of upland pollen reach 30% - 60%, and pollen assemblages in water samples do not indicate the nature of local vegetation at the sampling sites. Fluvial currents have the capacity to transport large quantities of pollen long distances, and the contribution of this fluvial transported pollen is relatively high, For example, percentages of Picea Dietr. pollen in water samples at sampling sites 130 km and 145 km away from Picea forests reach 16.5% and 7.7%, respectively. Fluvial pollen transport occurs primarily during flood periods, and pollen concentrations from the flood samples are 17.1 - 12.5 times those from normal fluvial flow. Reservoirs affect pollen transportation since pollen is deposited at reservoir inlets and pollen concentrations are much reduced at reservoir outlets. Human activity can thus change natural features of pollen transportation and deposition. The main factors influencing pollen concentrations and assemblages are sampling time, sampling location, and rainfall intensity.

关键词： pollen analysis modern river water Shiyang River arid region of China

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Reconstruction of the Vegetation and Environment during Different Climatic and Sociotechnical Conditions of the Last 3000 Years in Southwestern Hungary

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American Journal of Plant Sciences 2014年第11期5卷 1557-1577页

作者： Katalin Náfrádi Pál Sümegi Gusztáv Jakab Gergo Persaits Tünde Torocsik Department of Geology and Palaeontology University of SzegedSzegedHungary Hungarian Archaeological Institute BudapestHungary Institute of Environmental Science Szent István UniversitySzarvasHungary

Sedimentary basins such as Lake Baláta in Southwestern Hungary provide information about the development of lake-bog systems, the climate change through time and the environment of the surrounding area. The present study provides combined palynological, anthracological and macrobotanical data regarding climatic, vegetation and hydrological changes of a protected area for the last 3000 years. Lake Baláta is a sedimentary basin developed in a wind-blown yardang system in Southwestern Hungary. Due to its deeper location and the higher groundwater-level, the boggy lake functioned as a sediment catch. Geological drilling with an auger head drill provided an undisturbed sediment core. During the laboratory analysis different methods, such as sedimentological, geochemical, macrofossil, pollen and charcoal analysis were applied. The different stages and the evolution of the lake-bog system and the vegetation around the lake could be reconstructed and human impact was detected for the last 3000 years. Human impact and the transformation of vegetation was detected from the Early Iron Age (900/800 BC). Human impact reached its maximum during the 10th and 12th centuries when extent plant cultivation and grazing field zones were created. Climate change, increasing precipitation and consequently forest regeneration started in the 13th and 14th centuries. Parallel to this human impact decreased in the study area that indicates the reduction of the population and agrarian activity. Later at the beginning of the 15th century human impact increased again and remained significant until to the 16th century.

关键词： Anthracology Macrobotany Palaeoecology pollen analysis Southwestern Transdanubia Hungary

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