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Regional features of pollen R-values in China

Science China Earth Sciences 2024年第1期67卷 295-308页

作者： Jie XIA Jian NI College of Life Sciences Zhejiang Normal UniversityJinhua 321004China jinhua mountain observation and research station for subtropical forest ecosystems Jinhua 321004China

Establishing a quantitative relationship between modern pollen and vegetation remains a pivotal but intricate pursuit within the field of Quaternary *** R-value,a well-established and traditional metric characterized by its simplicity and direct applicability,serves to calibrate the nonlinear disparities between surface pollen and modern *** study entails the construction of a comprehensive pollen R-value dataset for China derived from R-values published between 1987 and *** dataset,compiled after rigorous screening,calibration,and standardization processes,encompasses 898 modern pollen sampling sites and 2115 pollen R-value data entries,encapsulating 152 pollen taxa spanning 65 families and 113 *** the extracted R-values yielded the following insights:(1)A macrospatial analysis validates previously established knowledge at a site-specific ***,pollen R-value variations across China are statistically *** two-thirds of pollen taxa exhibit underrepresentation(e.g.,Taxodiaceae,Corylus,Nitraria,Tamarix,Cyperaceae,Poaceae,and Fabaceae),while the remaining one-third display overrepresentation(e.g.,Pinus,Picea,Betula,Ephedra,Chenopodiaceae,and Artemisia).The degree of underrepresentation surpasses that of overrepresentation,and the representation patterns of Castanea,Quercus,Polygonaceae,and Asteraceae are contingent upon vegetation types.(2)Pollen R-values follow distinct spatial distribution patterns within *** the woody vegetation region of eastern China,R-values progressively decline from north to south,correlating with rising temperatures and ***,in herbaceous vegetation regions of northern and western China,R-values decrease from east to west and from northeast to southwest,corresponding to increased ***,pollen R-values manifest variation contingent on pollen taxa,vegetation types,and climatic regions,even differing for the same taxa across varying

关键词： Pollen R-value Modern pollen-vegetation relationship Regional pattern Variability Paleovegetation reconstruction

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Dynamics of iron and aluminum storages in a subtropical forest headwater stream

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Journal of mountain Science 2024年第7期21卷 2193-2205页

作者： YI Qiumeng MA Diting PENG Yan ZHAO Zemin YUAN Chaoxiang YUAN Ji NI Xiangyin WU Fuzhong YUE Kai AN Nannan Key Laboratory of Humid subtropical Eco-geographical Processes of Ministry of Education School of Geographical SciencesFujian Normal UniversityFuzhou 350117China Fujian Sanming forest Ecosystem National observation and research station Sanming 365002China

The forest headwater streams are important hubs for connecting terrestrial and aquatic ecosystems,with plant litter and sediments as the major carriers for material migrations;however,until now we knew little about the dynamics of trace elements such as iron(Fe)and aluminum(Al)in forest headwater ***,we quantitatively identified the spatiotemporal dynamics of Fe and Al storages in plant litter and sediments and their influencing factors in a subtropical forest headwater stream,and assessed the potential pollution *** results showed that:(1)the mean concentrations of Fe and Al in plant litter(sediments)were 5.48 and 8.46(7.39 and 47.47)g·kg^(-1),and the mean storages of Fe and Al in plant litter(sediments)were 0.26 and 0.43(749.04 and 5030.90)g·m^(-2),respectively;(2)the storages of Fe and Al in plant litter and sediments significantly fluctuated from January to December,and showed a decreasing pattern from the source to mouth;and(3)storages of Fe and Al had no significant correlation with riparian forest type and the present of tributary and the Fe and Al storages in plant litter were mainly affected by water temperature and water alkalinity,and their storages in sediments were mainly affected by water temperature and frequency of rainfall;and(4)there were no anthropogenic pollution in Fe and Al in the forest headwater *** study revealed the primary factors of concentrations and storages of Fe and Al in plant litter and sediments in a forest headwater stream,which will improve our understanding of the role of headwater streams in forest nutrient storage and cycling along with hydrological processes.

关键词： Plant litter Sediments Storage forest headwater stream Stream characteristics Trace element

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No generality in biodiversity-productivity relationships along elevation in temperate and subtropical forest landscapes

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forest ecosystems 2024年第3期11卷 255-265页

作者： Jiayun Zou Yahuang Luo Rupert Seidl Dominik Thom Jie Liu Lisa Geres Tobias Richter Linjiang Ye Wei Zheng Liangliang Ma Jie Song Kun Xu Dezhu Li Lianming Gao Sebastian Seibold Ecosystem Dynamics and forest Management research Group School of Life SciencesTechnical University of MunichHans-Carl-von-Carlowitz-Platz 285354FreisingGermany State Key Laboratory of Plant Diversity and Specialty Crops Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina Lijiang forest Biodiversity National observation and research station Kunming Institute of BotanyChinese Academy of SciencesLijiang674100China Berchtesgaden National Park Doktorberg 683471Germany Gund Institute for Environment University of Vermont617 Main StreetBurlingtonVT 1105405USA Faculty of Biological Sciences Institute for EcologyEvolution and DiversityConservation BiologyGoethe University FrankfurtFrankfurt am MainGermany University of Chinese Academy of Sciences Beijing10049China TUD Dresden University of Technology Forest ZoologyPienner Str.701737TharandtGermany

An improved understanding of biodiversity-productivity relationships(BPRs)along environmental gradients is crucial for effective ecosystem management and biodiversity *** stress-gradient hypothesis suggests that BPRs are stronger in stressful environments compared to more favorable ***,there is limited knowledge regarding the variation of BPRs along elevational gradients and their generality across different *** study how BPRs change with elevation,we harnessed inventory data on 6,431 trees from152 plots surveyed twice in eight to ten year intervals in mountain forests of temperate Europe and subtropical *** quantified the relationship between aboveground productivity and different biodiversity measures,including taxonomic,functional,and phylogenetic *** elucidate the processes underlying BPRs,we studied the variation of different functional traits along elevation across *** found no general pattern of BPRs across landscapes and *** were neutral for all biodiversity measures in temperate forests,and negative for taxonomic and functional diversity in subtropical *** were largely congruent between taxonomic,functional and phylogenetic *** found only weak support for the stress-gradient hypothesis,with BPRs turning from negative to positive(effect not significant)close to the tree line in subtropical *** temperate forests,however,elevation patterns were strongly modulated by species identity effects as influenced by specific *** effect of traits such as community-weighted mean of maximum plant height and wood density on productivity was congruent across *** study highlights the context-dependence of BPRs across elevation gradients and *** traits are key modulating factors of BPRs and should be considered more explicitly in studies of the functional role of ***,our findings highlight that potential trade-offs be

关键词： Biodiversity-ecosystem functioning Climate mitigation Elevation gradients forest management forest productivity Functional traits Nature conservation Phylogenetic diversity

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Sensitivity analysis of Biome-BGCMuSo for gross and net primary productivity of typical forests in China

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forest ecosystems 2022年第1期9卷 111-123页

作者： Hongge Ren Li Zhang Min Yan Xin Tian Xingbo Zheng Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing100094China University of Chinese Academy of Sciences Beijing100049China Institute of forest Resource Information Techniques Chinese Academy of ForestryBeijing100091China Key Laboratory of forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang110016China research station of Changbai mountain forest ecosystems Chinese Academy of SciencesAntu133613JilinChina

Background:Process-based models are widely used to simulate forest productivity,but complex parameterization and calibration challenge the application and development of these *** analysis of numerous parameters is an essential step in model calibration and carbon flux ***,parameters are not dependent on each other,and the results of sensitivity analysis usually vary due to different forest types and ***,global and representative sensitivity analysis would provide reliable information for simple ***:To determine the contributions of input parameters to gross primary productivity(GPP)and net primary productivity(NPP),regression analysis and extended Fourier amplitude sensitivity testing(EFAST)were conducted for Biome-BGCMuSo to calculate the sensitivity index of the parameters at four observation sites under climate gradient from ***:Generally,GPP and NPP were highly sensitive to C:Nleaf(C:N of leaves),Wint(canopy water interception coefficient),k(canopy light extinction coefficient),FLNR(fraction of leaf N in Rubisco),MRpern(coefficient of linear relationship between tissue N and maintenance respiration),VPDf(vapor pressure deficit complete conductance reduction),and SLA1(canopy average specific leaf area in phenological phase 1)at all observation *** sensitive parameters occurred at four observation sites within different climate *** and NPP were particularly sensitive to FLNR,SLA1 and Wint,and C:Nleaf in temperate,alpine and subtropical zones,***:The results indicated that sensitivity parameters of China's forest ecosystems change with climate *** found that parameter calibration should be performed according to plant functional type(PFT),and more attention needs to be paid to the differences in climate and *** findings contribute to determining the target parameters in field experiments and model calibration.

关键词： Sensitivity analysis Biome-BGCMuSo Productivity Regression analysis EFAST

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Effects of Land Cover on Soil Organic Carbon Stock in a Karst Landscape with Discontinuous Soil Distribution

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Journal of mountain Science 2014年第3期11卷 774-781页

作者： CHEN Xiang-bi ZHENG Hua ZHANG Wei HE Xun-yang LI Lei WU Jin-shui HUANG Dao-you SU Yi-rong Key Laboratory of Agro-ecological Processes in subtropical Region Institute of Subtropical Agriculture Chinese Academy of Sciences Huanjiang observation and research station for Karst Eco-systems Guangxi Institute of subtropical Crops

Land cover type is critical for soil organic carbon （SOC） stocks in territorial ecosystems. However, impacts of land cover on SOC stocks in a karst landscape are not fully understood due to discontinuous soil distribution. In this study, considering soil distribution, SOC content and density were investigated along positive successional stages （cropland, plantation, grassland, scrubland, secondary forest, and primary forest） to determine the effects of land cover type on SOC stocks in a subtropical karst area. The proportion of continuous soil on the ground surface under different land cover types ranged between 0.0% and 79.8%. As land cover types changed across the positive successional stages, SOC content in both the 0-20 cm and 20-50 cm soil layers increased significantly. SOC density （SOCD） within O-lOO cm soil depth ranged from 1.45 to 8.72 kg m^-2, and increased from secondary forest to primary forest, plantation, grassland, scrubland, and cropland, due to discontinuous soil distribution. Discontinuous soil distribution had a negative effect on 8OC stocks, highlighting the necessity for accurate determination of soil distribution in karst areas. Generally, ecological restoration had positive impacts on SOC accumulation in karst areas, but this is a slow process. In the short term, the conversion of croplandto grassland was found to be the most efficient way for SOC sequestration.

关键词： Soil organic carbon (SOC) Karst area Discontinuous soil distribution Land cover type Carbon sequestration potential

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中国地层花粉数据集

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植物生态学报 2023年第10期47卷 1453-1463页

作者：周伯睿廖梦娜李凯徐德宇陈海燕倪健曹现勇孔昭宸许清海张芸 Ulrike HERZSCHUH 蔡永立陈碧珊陈敬安陈陵康程波高洋黄赐璇黄小忠李升峰李文漪廖淦标刘光琇刘平妹刘兴起马春梅宋长青孙湘君唐领余王曼华王永波夏玉梅徐家声阎顺羊向东姚轶锋叶传永张志勇赵增友郑卓朱诚浙江师范大学化学与生命科学学院浙江金华321004 浙江金华山亚热带森林生态系统野外科学观测研究站浙江金华321004 中国科学院青藏高原研究所青藏高原地球系统科学国家重点实验室北京100101 中国科学院植物研究所植被与环境变化国家重点实验室北京100093 河北师范大学资源与环境科学学院石家庄050027 Alfred Wegener Institute Helmholtz Centre for Polar and Marine research Potsdam 14473Germany 上海交通大学设计学院上海200240 岭南师范学院地理科学学院广东湛江524048 中国科学院地球化学研究所环境地球化学国家重点实验室贵阳550081 广东石油化工学院理学院广东茂名525000 华中师范大学城市与环境科学学院武汉430079 贵州师范大学喀斯特研究院贵阳550001 中国科学院地理科学与自然资源研究所北京100101 兰州大学环境资源学院兰州730000 南京大学地理与海洋科学学院南京210023 Department of Oceanography and Coastal Sciences Louisiana State UniversityBaton RougeLA 70803USA 中国科学院西北生态环境资源研究院兰州730000 台湾大学地质科学系中国台北10617 首都师范大学资源环境与旅游学院北京100048 北京师范大学地表过程与资源生态国家重点实验室北京100875 同济大学海洋与地球科学学院上海200092 中国科学院南京地质古生物研究所南京210008 鲁东大学资源与环境工程学院山东烟台264025 中国科学院东北地理与农业生态研究所长春130102 自然资源部第一海洋研究所山东青岛266061 中国科学院新疆生态与地理研究所乌鲁木齐830011 中国科学院南京地理与湖泊研究所南京210008 中国科学院植物研究所系统与进化植物学国家重点实验室北京100093 中国地质科学院矿产资源研究所北京100037 中国科学院庐山植物园江西九江332900 西南大学地理科学学院重庆400715 中山大学地球科学与工程学院广州510275

地层孢粉数据是古植被和古气候重建等古环境研究的重要基础。孢粉数据库推动古环境研究从点到区域和全球尺度,从定性到定量,从而实现在大空间尺度和长时间序列上探索植被、气候和人类干扰的相互关系,以更好地理解地球系统的演变。该数... 详细信息

地层孢粉数据是古植被和古气候重建等古环境研究的重要基础。孢粉数据库推动古环境研究从点到区域和全球尺度,从定性到定量,从而实现在大空间尺度和长时间序列上探索植被、气候和人类干扰的相互关系,以更好地理解地球系统的演变。该数据集整合了全国第四纪末期(5万年以来)共372个地层花粉序列,涵盖790个花粉类群,样点分布于中国30个省级行政区与领海。数据集包含地层花粉采样点的地名、经纬度坐标和海拔高度、数据来源、样品类型、沉积物长度、样品数量、测年方法及测年数量、时间跨度和参考文献,以及每个采样点的花粉含量百分比。数据主要来源于20世纪80年代至今。采样点集中分布在温带和亚热带森林、温带草原和荒漠以及青藏高原高寒植被区域;在深海到青藏高原不同海拔高度都有分布,但集中在海拔2000 m之下。按照数据来源区分,原始数据样点178个,占47.8%;数值化数据194个,占52.2%。按照样品类型分类,多数样点为湖泊样品(151个)、冲积物/洪积物样品(99个)与泥炭样品(67个),占总样点数的85.2%。年代测定的主要方法为放射性碳同位素手段(占样品总数的93.8%),大部分记录有2-10个测年数据。采样点的平均花粉类群数量是19个,以4-30个花粉类群的采样点最多。代表性花粉类群(松属(Pinus)、栎属(Quercus)、蒿属(Artemisia)、禾本科)含量的时空分布格局表明,从末次盛冰期到全新世,这些花粉科属的分布范围扩大,含量也增加,但分布区域具有分异。半个多世纪以来,孢粉学工作者建立中国大部分地区的地层花粉记录,为探究古环境演变及其气候变化、人类活动驱动机制奠定了重要的基础。

关键词：花粉数据库地层花粉第四纪末期古植被古气候

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中国现代花粉数据集

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植物生态学报 2021年第7期45卷 799-808页

作者：陈海燕徐德宇廖梦娜李凯倪健曹现勇程波郝秀东孔昭宸李升峰李小强刘光琇刘平妹刘兴起孙湘君唐领余魏海成许清海阎顺羊向东杨振京于革张芸张志勇赵克良郑卓 Ulrike HERZSCHUH 浙江师范大学化学与生命科学学院浙江金华321004 浙江金华山亚热带森林生态系统野外科学观测研究站浙江金华321004 中国科学院青藏高原研究所青藏高原地球系统科学国家重点实验室北京100101 华中师范大学城市与环境科学学院武汉430079 南宁师范大学北部湾环境演变与资源利用教育部重点实验室南宁530001 中国科学院植物研究所北京100093 南京大学地理与海洋科学学院南京210023 中国科学院古脊椎动物与古人类研究所北京100044 中国科学院西北生态环境资源研究院兰州730000 台湾大学地质科学系中国台北106171 首都师范大学资源环境与旅游学院北京100048 同济大学海洋与地球科学学院上海200092 中国科学院南京地质古生物研究所南京210008 中国科学院青海盐湖研究所西宁810008 河北师范大学资源与环境科学学院石家庄050027 中国科学院新疆生态与地理研究所乌鲁木齐830011 中国科学院南京地理与湖泊研究所南京210008 中国地质科学院水文地质与环境地质研究所石家庄050061 中国科学院庐山植物园江西九江332900 中山大学地球科学与工程学院广州510275 Alfred Wegener Institute Helmholtz Centre for Polar and Marine research Potsdam 14473Germany

孢粉是重建古植被、古气候的重要基础数据。孢粉数据库对研究样点至区域和全球尺度上的古环境演变规律、古气候变化特征反演和古生物地球化学循环模拟等具有重要意义。该文收集整理了中国1960–2020年间发表和部分未发表的现代花粉数据... 详细信息

孢粉是重建古植被、古气候的重要基础数据。孢粉数据库对研究样点至区域和全球尺度上的古环境演变规律、古气候变化特征反演和古生物地球化学循环模拟等具有重要意义。该文收集整理了中国1960–2020年间发表和部分未发表的现代花粉数据记录,包括样品编号、采样位置、采样地经纬度和海拔高度、样品类型、数据来源、数据类型、周边植被信息、参考文献、花粉类群及其含量等信息;并对数据进行筛选和标准化等处理,由此整合为中国现代花粉数据集。该数据集由4 497个现代花粉采样点的数据信息组成,包括660个来自中国第四纪孢粉数据库数据,1 763个前期整理发表的数据和2 074个近期收集的数据,涵盖772个花粉类群。样品类型以土壤表层样品(3 332个)为主,苔藓样品以及湖泊、海洋表层样品等为辅,广泛分布于全国不同地理区域和植被类型中,其中以温带荒漠区域(24.91%)和亚热带常绿阔叶林区域(24.02%)最丰富,其次为温带草原区域(16.14%)和青藏高原高寒植被区域(15.83%)。数据按照来源可分为原始数据(58%)和数值化数据(42%);按照数据类型可分为原始统计粒数的样点(59%)和以花粉百分比表达的样点(41%)。半个多世纪以来,科研人员开展了大量的表层现代花粉取样和研究。本数据集虽然仅获取部分记录,但样点覆盖了我国绝大多数地区,可有效地用于古植被与古气候重建的现代孢粉与现代植被校验,并将为中国孢粉数据库的建立与更深入的孢粉研究提供数据支撑。

关键词：中国花粉数据库表层花粉现代植被

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