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New material of Coniopteris simplex from the Middle Jurassic of the Ordos Basin,inner mongolia,China and implications on its spatio-temporal distribution and paleogeography

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Journal of Palaeogeography 2024年第2期13卷 199-211页

作者： Yun-Feng Li Chang-Lu Zhang Fei Liang Xiao Tan Fan-Hao Gong Chun-Lin Sun Tao Li Yu-Ling Na Research Center of Paleontology and Stratigraphy Jilin UniversityChangchun 130026Jilin ProvinceChina College of Earth Sciences Jilin UniversityChangchun 130061Jilin ProvinceChina College of Paleontology Shenyang Normal UniversityShenyang 110034Liaoning ProvinceChina Key Lab of Evolution of Past Life in NE Asia Ministry of Natural ResourcesShenyang Normal UniversityShenyang 110034Liaoning ProvinceChina Shenyang Center of Geological Survey China Geological SurveyShenyang 110034Liaoning ProvinceChina

Coniopteris simplex is a common component in many Jurassic ***,due to morphological variations in sterile fronds and incomplete preservation of reproductive organs,its classification has been controversial for a long ***,we present new material collected from the Middle Jurassic Yan’an Formation in the Ordos Basin,inner *** new material reveals important morphological characters,including hemi-dimorphic fronds,two forms of sterile pinnae,short-stalked sori and sporangia on fertile fronds,annulus of sporangium composed of about 30 cells,in situ rounded triangular spores with protruded suture,and the lips of trilete laesura encircled by one or two rows of small *** on these observations,we emended the diagnosis of this common *** spatio-temporal distribution of Coniopteris simplex shows that the iconic species was restricted to the paleolatitudes ranging from 19.5°N to 48.9°N in the Northern Hemisphere during the Early—Late Jurassic,mainly distributed in the tropical to paratropical zones,and the paleolongitude ranging from 9.6°E to 129.3°E,which may be limited by the opening of the Viking Corridor and the splitting of the Central Atlantic Ocean.

关键词： Coniopteris simplex Yan'an Formation Middle Jurassic inner mongolia Paleogeography

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Wind farms increase land surface temperature and reduce vegetation productivity in the inner mongolia

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Geography and Sustainability 2024年第3期5卷 319-328页

作者： Luyao Liu Pengtao Liu Jiawei Yu Gang Feng Qing Zhang Jens-Christian Svenning Ministry of Education Key Laboratory of Ecology and Resource Use of the mongolian Plateau School of Ecology and EnvironmentInner Mongolia UniversityHohhot 010021China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China inner mongolia Autonomous Region Ecological and Agricultural Meteorological Centre Hohhot 010051China e Collaborative Innovation Center for Grassland Ecological Security(Jointly Supported by the Ministry of Education of China and inner mongolia Autonomous Region) Hohhot 010021China Center for Ecological Dynamics in a Novel Biosphere(ECONOVO) Department of BiologyAarhus UniversityNy Munkegade 114Aarhus C DK-8000Denmark Center for Biodiversity Dynamics in a Changing World(BIOCHANGE) Department of BiologyAarhus UniversityNy Munkegade 114Aarhus C DK-8000Denmark

Wind power has been developing rapidly as a key measure to mitigate human-driven global *** under-standing of the development and impacts of wind farms on local climate and vegetation is of great importance for their rational use but is still *** this study,we combined remote sensing and on-site investigations to identify wind farm locations in inner mongolia and performed landscape pattern analyses using *** explored the impacts of wind farms on land surface temperature(LST)and vegetation net primary productivity(NPP)between 1990 and 2020 by contrasting these metrics in wind farms with those in non-wind farm *** results showed that the area of wind farms increased rapidly from 1.2 km2 in 1990 to 10,755 km2 in ***,wind farms are mainly clustered in three aggregation areas in the ***,wind farms increased nighttime LST,with a mean value of 0.23℃,but had minor impacts on the daytime ***,wind farms caused a decline in NPP,especially over forest areas,with an average reduction of 12.37 GC/m^(2).Given the impact of wind farms on LST and NPP,we suggest that the development of wind farms should fully consider their direct and potential *** study provides scientific guidance on the spatial pattern of future wind farms.

关键词： Wind farm Landscape pattern LST NPP inner mongolia

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Research on Development Strategy of Rare Earth Industry in inner mongolia

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Journal of Rare Earths 2005年第S1期23卷 628-636页

作者：苏文清 School of Management Xi'an Jiaotong University Xi'an 710049 China

Rare earth (RE) industries in inner mongolia experienced a rapid development in recent years, which is mainly reflected in the aspects of primary products and new materials, but the development of its application is still slow in progress. In particular, the over-competition in primary products not only results in the unfavorable situation for environmental protection and ineffective use of rare earth resources, but also brings about many problems for the survival and development of enterprises. Rare earth industry is not an industry with large scale, and its contribution to the economy is generated by applying rare earths in other industries. Therefore, the development level of rare earth industry can not be evaluated by its economic scale. The rare earth industry in inner mongolia will place great emphasis on the development of “Five bases”, “One center”, and “Six industrial chains”. Based on these focal points the products structure should be upgraded, a system for RE human resource in which talents can be shared in the industries should be built up, the level of research and development and technology introduction should be improved, more channels for financing should be developed and more fund solutions should be provided, comprehensive environment that will be favorable to the concentration and development of the industries should be promoted greatly, and a supporting system for the industrial policies should be built up in order to strengthen the advantages and competitiveness of RE industry.

关键词： rare earth industry inner mongolia strategic management

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Emission characteristics of carbon dioxide in the semiarid Stipa grandis steppe in inner mongolia, China

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Journal of Environmental Sciences 2006年第3期18卷 488-494页

作者： LIU Xing-ren QI Yu-chun LIU Ji-yuan Manfred Domroes LIU Li-xin GENG Yuan-bo YANG Xiao-hong LI Ming-feng Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Department of Geography Mainz University 55099 Mainz Germany Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Using the static opaque chamber method, the soil respiration rates （SR） were measured through the continuous experiments in situ in semiarid Stipa grandis steppe in Xilin River Basin of inner mongolia, China from June 2001 to June 2003, in parallel, the difference between the SR and the ecosystem respiration rates （TER） were compared. The results indicated that the seasonal variations of the SR and TER were obvious with higher emissions in growing season and a relatively low efflux level in non-growing season, furthermore, the negative effluxes were found in the observation site in winter; the annual CO2 efflux of total ecosystem ranged from 160.5 gC/（m^2·a） to 162.8 gC/（m^2·a） and that of soil ranged from 118.7 gC/（m^2·a） to 152.3 gC/（m^2·a）. The annual SR accounted for about 74.0% to 93.5% of the annual TER, but the results of Analysis of Variance （ANOVA） indicated that the difference between the annual average TER and SR did not reach the significance level of 0.05. The TER was under similar environmental controls as SR, in growing seasons of drought years, the variations of soil moisture at 0-10 cm and 10-20 cm depth could account for 79,1% 95.6% of the changes of the SR and TER, but in non-growing season, more than 75% of the variations of the SR and TER could be explained by the changes of the ground temperature of soil surface layers.

关键词： inner mongolia semiarid grassland Stipa grandis steppe CO2 fluxes environmental factors

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Estimation and Spatio-temporal Patterns of Carbon Emissions from Grassland Fires in inner mongolia,China

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Chinese Geographical Science 2020年第4期30卷 572-587页

作者： YU Shan JIANG Li DU Wala ZHAO Jianjun ZHANG Hongyan ZHANG Qiaofeng LIU Huijuan Key Laboratory o f Geographical Processes and Ecological Security^in Changbai Mountains Ministry o f EducationSchool o f Geographical SciencesNortheast Normal UniversityChangchun 130024China School of Geographical Sciences Inner Mongolia Normal UniversityHohhot 010022China Grassland Research Institute Chinese Academy of Agricultural SciencesHohhot 010010China Urban Remote Sensing Application Innovation Center School of Geographical SciencesNortheast Normal UniversityChangchun 130024China

Grassland fires results in carbon emissions,which directly affects the carbon cycle of ecosystems and the carbon *** grassland area of inner mongolia accounts for 22%of the total grassland area in China,and many fires occur in the area every ***,there are few models for estimation of carbon emissions from grassland *** estimation of direct carbon emissions from grassland fires is critical to quantifying the contribution of grassland fires to the regional balance of atmospheric *** this study,the regression equations for aboveground biomass(AGB)of grassland in growing season and MODIS NDVI(Normalized Difference Vegetation Index)were established through field experiments,then AGB during Nov.–*** retrieved based on that in *** decline rate,finally surface fuel load was obtained for whole *** on controlled combustion experiments of different grassland types in inner mongolia,the carbon emission rate of grassland fires for each grassland type were determined,then carbon emission was estimated using proposed method and carbon emission *** revealed that annual average surface fuel load of grasslands in inner mongolia during 2000–2016 was approximately 1.1978×1012 *** total area of grassland which was burned in the inner mongolia region over the 17-year period was 5298.75 km2,with the annual average area of 311.69 *** spatial distribution of grassland surface fuel loads is characterized by decreasing from northeast to southwest in inner *** total carbon emissions from grassland fires amounted to 2.24×107 kg with an annual average of 1.32×106 for the study *** areas with most carbon emissions were mainly concentrated in Old Barag Banner and New Barag Right Banner and on the right side of the Oroqin Autonomous *** spatial characteristics of carbon emission depend on the location of grassland fire,mainly in the northeast of inner mongolia include Hulunbuir City,Hinggan League,Xilin Gol Leagu

关键词： grassland fires surface fuel load area burned estimation of carbon emissions inner mongolia China

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Divergent responses of plant biomass and diversity to short-term nitrogen and phosphorus addition in three types of steppe in inner mongolia,China

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Ecological Processes 2022年第1期11卷 427-438页

作者： Ning Guo Mingyang Xie Zhao Fang Feng Jiao Xiaoyu Han Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Chinese Academy of Science and Ministry of Water ResourceYangling 712100ShaanxiChina

Background:Understanding the response of the plant community to increasing nitrogen(N)and phosphorus(P)inputs is helpful for managing and protecting grassland ecosystems in semiarid ***,information about different types of steppe responses to N and P availability in semiarid grasslands is *** 2017-2018,two field experiments were conducted with six levels of N(from 5 to 30 g N m^(−2)yr^(−1))and P(from 2.5 g to 15 g P m^(−2)yr^(−1))additions in three different temperate steppes,including meadow steppe(MS),typical steppe(TS),and desert steppe(DS),in northern China to study the effects of these addition rates on community biomass and ***:Our results showed that plant biomass and diversity in the three steppe types in inner mongolia responded differently to elevated N and P *** P promoted aboveground and belowground biomass more than increasing N in the three temperate ***-term N and P additions reduced plant diversity to some extent,with the most pronounced decreases in MS and *** is noteworthy that there were response thresholds for plant diversity and biomass in response to N and P inputs in different steppe types(e.g.,10 g P m^(−2)yr^(−1)).Furthermore,redundancy analysis and stepwise regression analysis revealed that changes in soil properties induced by nutrient addition and climate conditions jointly regulated changes in vegetation biomass and ***:The plant biomass and diversity of three steppe types in inner mongolia respond divergently to elevated N and P *** results indicate that regional differences in climate and soil substrate conditions may jointly contribute to the divergent responses of plant biomass and diversity to short-term N and P *** analyses provide new insights into managing and protecting grassland *** that the effects of nutrient addition on plant diversity and productivity may have increasing effects over time,studies on long-term in sit

关键词： Steppe type Nitrogen(N)addition Phosphorus(P)addition Plant diversity Biomass inner mongolia

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Responses of vegetation yield to precipitation and reference evapotranspiration in a desert steppe in inner mongolia,China

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Journal of Arid Land 2023年第4期15卷 477-490页

作者： LI Hongfang WANG Jian LIU Hu MIAO Henglu LIU Jianfeng Yinshanbeilu Grassland Eco-hydrology National Observation and Research Station China Institute of Water Resources and Hydropower ResearchBeijing 100038China Institute of Water Resources for Pastoral Area Ministry of Water ResourcesHohhot 010020China inner mongolia Hydraulic Research Institute Hohhot 010020China

Drought,which restricts the sustainable development of agriculture,ecological health,and social economy,is affected by a variety of *** is widely accepted that a single variable cannot fully reflect the characteristics of drought *** precipitation,reference evapotranspiration(ET_(0)),and vegetation yield can derive information to help conserve water resources in grassland ecosystems in arid and semi-arid *** this study,the interactions of precipitation,ET_(0),and vegetation yield in Darhan Muminggan Joint Banner(DMJB),a desert steppe in inner mongolia Autonomous Region,China were explored using two-dimensional(2D)and three-dimensional(3D)joint distribution *** types of Copula functions were applied to quantitatively analyze the joint distribution probability of different combinations of precipitation,ET_(0),and vegetation *** the precipitation–ET_(0)dry–wet type,the 2D joint distribution probability with precipitation≤245.69 mm/a or ET_(0)≥959.20 mm/a in DMJB was approximately 0.60,while the joint distribution probability with precipitation≤245.69 mm/a and ET_(0)≥959.20 mm/a was approximately ***,the joint return period that at least one of the two events(precipitation was dry or ET_(0)was wet)occurred was 2 a,and the co-occurrence return period that both events(precipitation was dry and ET_(0)was wet)occurred was 5 *** this condition,the interval between dry and wet events would be short,the water supply and demand were unbalanced,and the water demand of vegetation would not be *** addition,when precipitation remained stable and ET_(0)increased,the 3D joint distribution probability that vegetation yield would decrease due to water shortage in the precipitation–ET_(0)dry–wet years could reach up to 0.60–*** future work,irrigation activities and water allocation criteria need to be implemented to increase vegetation yield and the safety of water resources in the desert steppe of inner mongolia.

关键词： precipitation reference evapotranspiration vegetation yield Copula functions desert steppe dry and wet events inner mongolia

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Ginkgo Huolinhensis *** the Lower Cretaceous of Huolinhe Coal Field,inner mongolia,China

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Acta Geologica Sinica(English Edition) 2012年第1期86卷 11-19页

作者： DONG Man SUN Ge Research Center of Palaeontology and Stratigraphy Jilin UniversityChangchun 130026China Key Lab for Evolution of Past Life and Environment in NEAsia Ministry of EducationChina(Jilin University)Changchun 130026China Palaeontological Institute Shenyang Normal UniversityShenyang 110034China

A new species, Ginkgo huolinhensis sp. nov., with well-preserved cuticle from the Lower Cretaceous, Huolinhe Formation of Huolinhe Coal Field in inner mongolia, China, was studied morphologically and anatomically. The main characters of the new species are found in the leaves which are deeply dissected with narrow lobes, trichomes developed on both upper and lower epidermal cells, a media papilla developed on the periclinal walls for each cell in upper cuticle, and no trichomes on the cuticle of the petioles. These characters of G. huolinhensis sp. nov. distinguish from the known species of Ginkgo previously reported. This study of the new species is beneficial for the taxonomic research of fossil Ginkgo, and should be helpful for a better understanding the paleoenvironment of Ginkgo living in northeastern China during the Early Cretaceous.

关键词： new species Ginkgo Early Cretaceous Huolinhe inner mongolia

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Systematic Revision of Trilobites from the Middle Ordovician(Darriwilian) Klimoli Formation of the Zhuozishan Area,inner mongolia,China

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Acta Geologica Sinica(English Edition) 2016年第6期90卷 1955-1975页

作者： LEE Seung-Bae LEE Dong-Chan WOO Jusun ZHANG Xingliang Geology Division Korea Institute of Geoscience and Mineral Resources Department of Earth Science Education Chungbuk National University Division of Polar Earth-System Sciences Korea Polar Research Institute Early Life Institute and State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University

New morphologic information permits systematic revision of trilobites from the Middle Ordovician Klimoli Formation of the Zhuozishan area, Ordos Basin, inner mongolia. The new assemblage is composed of 10 species of the Raphiophoridae, Nileidae, Asaphidae, and Telephinidae.？ An asaphid, aff. Mioptychopyge lashachungensis （previously Paraptychopyge lashachungensis） displays an intermediate morphology between the Chinese nobiliasaphine genera Mioptychopyge and Zhenganites. The pygidial doublure is regarded as the most significant character to differentiate Symphysurus klimoliensis （previously Nileus klimoliensis） of the Nileidae from such closely allied taxa as Poronileus. A nileid, cf. Peraspis kujandensis displays typical nileid morphology, unlike the type species, Peraspis lineolata, which might turn out to be an asaphid. Ampyx gongwusuensis sp. nov. of the Raphiophoridae is the first record of the genus in the Zhuozishan area and reveals morphologic details that might be employed to resolve Ampyx taxonomy in China. Morphologic differences between A. gongwusuensis and Abulbaspis ordosensis might represent a case of sexual dimorphism.

关键词： Invertebrate paleontology Trilobita systematics Klimoli Formation Darriwilian Zhuozishan inner mongolia

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Climate Reconstruction based on Pollen Analysis in inner mongolia, North China from 51.9 to 30.6 kaBP

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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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