检索结果-南通市图书馆

Modern pollen-vegetation relationship based on discriminant analysis across an altitudinal transect on Gongga Mountain,eastern Tibetan Plateau

引用

Chinese Science Bulletin 2012年第35期57卷 4600-4608页

作者： LI Quan GE QuanSheng tong guobang Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Key Laboratory of Tibetan Environmental Changes and Land Surface Processes Chinese Academy of SciencesBeijing 100101China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China

Quantitative relationship between modern pollen assemblage and altitudinal vegetation belt is crucial for the reconstruction of paleovegetation in the mountain *** pollen analysis on 70 topsoil samples was conducted across an altitudinal transect(1100-4500 m) on the eastern slope of Gongga Mountain in the eastern Tibetan Plateau with an elevation interval of 50 *** of major pollen types along the transect indicated a weak correlation between Pinus pollen and the *** of Picea and Abies pollen(percentage sum of 2%-8%) could fairly indicate the elevation range of 2700-3700 m,as well as the subalpine dark coniferous forest and the timberline in the *** percentage intervals of alpine types of Ericaceae,Cupressaceae and Cyperaceae were correlated to the high-elevation regions(3700-4500 m) dominated by alpine shrub meadow and alpine *** altitudinal vegetation belts on the eastern slope of Gongga Mountain were well defined by discriminant analysis conducted on the modern pollen assemblages,as reflected by high values of probability of modern *** of the modern pollen assemblages(88.5%) were typical for the vegetation types at their sampling ***,the relationship between the modern pollen assemblages and vegetation across the altitudinal transect based on discriminant analysis can be applied to the quantitative reconstruction of paleovegetation changes in the mountain regions of the eastern Tibetan Plateau.

关键词：青藏高原东部海拔高度判别分析贡嘎山植被带松花粉孢粉组合定量重建

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Palynological evidence for vegetational and climatic changes from the HQ deep drilling core in Yunnan Province, China

引用

Science China Earth Sciences 2007年第8期50卷 1189-1201页

作者： XIAO XiaYun SHEN Ji WANG SuMin XIAO HaiFeng tong guobang Nanjing Institute of Geography and Limnology Chinese Academy of SciencesNanjing 210008China Institude of Hydrogeology and Engineering Geology Chinese Academy of Geological SciencesShijiazhuang 050061China

The high-resolution pollen study of a 737.72-m-long lake sediment core in the Heqing Basin of Yunnan Province shows that the vegetation and climate of mountains around the Heqing Basin went through six obvious changes since 2.780 Ma B.P. Namely, Pinus forest occupied most mountains around the studied area and the structure of vertical vegetational belt was simple between 2.780 and 2.729 Ma B.P., reflecting a relatively warm and dry climate. During 2.729―2.608 Ma B.P., the areas of cold-temperate conifer forest (CTCF) and Tsuga forest increased and the structure of vertical vegetational belt became clear. According to percentages of tropical and subtropical elements growing in low-altitude regions rifely increased, we speculate that the increase of CTCF and Tsuga forest areas mainly resulted from strong uplift of mountains which provided upward expanding space and growing condition for these plants. Thus, the climate of the low-altitude regions around the basin was relatively warm and humid. Between 2.608 and 1.553 Ma B.P., Pinus forest occupied most mountains around the studied area and forest line of CTCF rose, which reflects a moderately warm-dry climate on the whole. During 1.553―0.876 Ma B.P., the structure of vertical vegetational belt in mountains around the studied area became complicated and the amplitude of vegetational belts shifting up and down enlarged, which implies that the amplitude of climatic change increased, the climatic associational feature was more complex and the climate was moderately cold at a majority of the stage. During 0.876―0.252 Ma B.P., there were all vertical vegetational belts existing at present in mountains around the studied area. The elements of each belt were more abundant and complex than earlier. At different periods in the stage vertical vegetational belts occurred as expanding or shrinking, and alternated each other. The amplitude of vegetational belts shifting up and down was the maximum in the whole section. This change s

关键词： pollen record palaeovegetation palaeoclimate climatic transition Heqing Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The plant diversity and its relationship with paleoenvironment since 2.78 Ma revealed by pollen records in the Heqing deep drilling core

引用

Chinese Science Bulletin 2008年第23期53卷 3686-3698页

作者： XIAO XiaYun SHEN Ji WANG SuMin XIAO HaiFeng tong guobang State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China Department of Geography Harbin Normal University Harbin 150084 China Institute of Hydrogeology and Engineering Geology Chinese Academy of Geological Sciences Shijiazhuang 050061 China

Multifold palynological diversity indices calculated by pollen data of the Heqing deep drilling core are synthetically analyzed, the results show that the plant diversity rapidly increased and its fluctuant amplitude and frequency evidently largened during the stages of 2.729―2.608 Ma, 1.176―0.342 Ma and since 0.118 Ma respectively, while during the other periods the plant diversity was relatively low with a gentle fluctuation. To discuss further the relation between ancient plant diversity and paleoenvironment, it is considered that the plant diversity in the Heqing region lies on increase or decrease of vertical vegetational belts in mountains around the studied area and richness of components of these vegetational belts, and is controlled by amplitude of tectonic uplift of mountains and climatic changes. The high plant diversity during 2.729―2.608 Ma responded to the strong uplift of mountains at the stage, while the plant diversity greatly increased and its fluctuant amplitude and frequency markedly largened at about 1.176 Ma was obviously response to the Middle Pleistocene Transition. The plant diversity and its fluctuant amplitude and frequency increased further at about 0.991 Ma may be superposably affected by both the Middle Pleistocene Transition and the tectonic uplift. The plant diversity increased since 0.118 Ma may indicate that the southwest monsoon strengthened and humid climate more fitted many kinds of plants to grow.

关键词：花粉传播植物多样性地质气候盆地

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A 16000-year pollen record of Qinghai Lake and its paleoclimate and paleoenvironment

引用

Chinese Science Bulletin 2002年第22期47卷 1931-1936页

作者： LIU Xingqi SHEN Ji WANG Sumin YANG Xiangdong tong guobang ZHANG Enlou Key Laboratory of Lake Sedimentation and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Institute of Hydrological and Environmental Geology Chinese Academy of Geological SciencesZhengding 050803China

The paleoclimate and paleoenvironment of Qinghai Lake indicated by a 16000-year pollen record are as follows. It was very cold and dry before 15200 years. During the Late Glacial, the climate varied from colder and semiarid to cool and semi-humid and fluctuated frequently but with little amplitude. Three cold events in the periods of 13400-13000, 11600-12000, and 11000-10400 aBP respectively correspond to the Oldest Dryas, Older Dryas and Younger Dryas events, whereas the two warm periods between them, 12000-13000 and 11600-11000 aBP, respectively correspond to Boiling and Allerod periods. The temperature increased abruptly after the Younger Dryas event, and then the climate gradually turned to be warm and wet from warm and semiarid. In the Holocene, the largest amplitude of cold event that occurred at ca. 8200 aBP is quite prominent. The Holocene climatic optimum culminated at 6700 aBP. After 2100 aBP, the climate tended to be cold and dry, keeping on up to now. Palaeoclimatic evolution and events of

关键词： Qinghai Lake pollen Lateglacial paleoclimate and paleoenvironment.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Groundwater Systems and Eco-hydrological Features in the Main Karst Regions of China

引用

Acta Geologica Sinica(English Edition) 2006年第5期80卷 743-753页

作者： LU Yaoru ZHANG Feng＇e LIU Changli tong guobang ZHANG Yun Chinese Academy of Geological Sciences Beijing 100037 Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences Shijiazhuang Hebei 050061

Different karst water features and related water resources are present both in southern and northern China. There are over 3,358 well-developed karst ground river systems with total discharges in the dry season of about 420×10^8 m^3 in the main karst regions in the southern part of China. Exploitation rates are only 8-15%. Over 100 larger karst spring systems in the main karst regions of northern China cover a catchment area from 500 km^2 to over 4,000 km^2, of which the average discharge appears to be from about 1 m^3/s to 13 m^3/s and the exploitation rates are 70-80%. Six aspects of the eco- hydrological features of some typical karst regions in China comprising water environment, ecological features, materials and structures between parent rock and soil, bio-geological processes and palynological studies （spore-pollen） are discussed. Qualitative evaluation of eco-geology and rocky desertification in the karst regions should be based on the main karst ecological conditions as well as artificial, i.e., man-made impacts.

关键词： karst water resources spore-pollen eco-hydrogeology geo-ecology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Relationships between vegetation and stomata,and between vegetation and pollen surface soil in Yunnan,Southwest China

引用

Chinese Science Bulletin 2013年第15期58卷 1775-1786页

作者： SHEN HuaDong LI ChunHai WAN HeWen tong guobang LIU JinSong DAN Johnson State Key Laboratory of Lake Science and Environment Nanjng Institute of Geography and LimnologyChinese Academy of Sciences University of Chinese Academy of Sciences College of Life Sciences Anhui University Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences Mathematics and Information Science College Hebei Normal University The Key Laboratory of Calculation and Application of Hebei Province Environmental Science Department of GeographyUniversity of Lethbridge

Surface pollen and stomata of 61 samples collected in a study area ranging from tropical seasonal rainforest to oak forest(Quercus spinosa) in the Yulong Snow Mountain region in Yunnan,China,are used to distinguish vegetation *** results show that tropical seasonal rainforest(and mountain rainforest),south subtropical evergreen broad-leaved forest,and Quercus shrub are distinguished effectively from other vegetation types by analysis of surface *** south subtropical evergreen broad-leaved forest,Pinus kesiya forest and evergreen broadleaf forest are distinguished effectively from other types of vegetation by pollen ***,*** forest is not distinguished from other vegetation types,and ***,*** forest and temperate deciduous conifer mixed forest are not *** over-representation of Pinus pollen is the main reason that these vegetation communities are not distinguished from each *** stomata analysis is an effective tool for identifying and distinguishing different types of coniferous forest,and this method performs well even with a small number of sampling points.

关键词：植被群落中国云南花粉分析中国西南地区南亚热带常绿阔叶林气孔表土热带季节雨林

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Primary Study on Quantitative Reconstruction of Middle-Late Eocene Climate in Jianghan Basin

引用

Journal of China University of Geosciences 2002年第3期13卷 252-259页

This paper reports our primary effort in the quantitative reconstruction ofpaleoclimate based on the thrine in phytoecology of the affinity parent plants in the stratigraphicpollen records. The Eocene pollen data come from our former study on the Mingjia borehole 1 in theJianghan basin. The fluctuating trend in the parameter curve of climate shows that the climate inthe Middle Eocene in the Jianghan basin was more or less comparable with that of the present22°―26°N, characteristic of a humid, semi-humid central-southern subtropical climate. The annualtemperature at that time dropped by 1 ℃― 4 ℃ in the Late Eocene, approximately equal to that ofthe present 23°―28°N of northern-central subtropical climate. However, the climate composite atthat time, characterized by higher temperature, small annual range and big fluctuation inprecipitation, was quite different from the present one. The average temperature in January in theMiddle Eocene, higher than that of today, ranged between 5 ℃ and 9 ℃, indicating that no effect ofwinter monsoon occurred in the Middle Eocene, though such an effect may have occurred occasionallyin the Late Eocene. Major temperature decline is recognized at the depth of 2 100 m in the borehole,as was indicated by the decline in average January temperature, the increase in annual range, andthe increase in the deciduous broad-leaved types of trees in the spore-pollen assemblage. The sharpfluctuation in the annual precipitation, usually raging from 300 to 1 700 mm, was favorable for themigration and accumulation of salty deposit. When the precipitation was lower than 1 000 mm,ephemera shrub increased at the same depth as that of the salty deposit. It is, therefore, deducedthat the formation of the salty deposit was attributed mainly to the dry and hot environment in thehigh mountains and deep basins. The small annual precipitation and the intense fluctuation arefavorable for the sustainable accumulation of the salts, which is different from the present

关键词： quantitative reconstruction of paleoclimate annual range function ofthrine in phytoecology fuzzy mathematics eocene jianghan basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

云南鹤庆盆地中更新世以来的孢粉记录及其植被与气候变化

引用

湖泊科学 2006年第4期18卷 369-376页

作者：肖霞云沈吉肖海丰童国榜中国科学院南京地理与湖泊研究所中国地质科学院水文地质环境地质研究所正定050803

通过对“中国大陆环境钻探计划”首钻——云南鹤庆深钻前155 m约800 ka以来的岩芯进行孢粉研究,探讨了云南鹤庆盆地中更新世以来的植被演替与古气候变迁．研究表明鹤庆盆地周围山地的植被在约800 kaBP至6．98 kaBP之间经历了以松为主的... 详细信息

通过对“中国大陆环境钻探计划”首钻——云南鹤庆深钻前155 m约800 ka以来的岩芯进行孢粉研究,探讨了云南鹤庆盆地中更新世以来的植被演替与古气候变迁．研究表明鹤庆盆地周围山地的植被在约800 kaBP至6．98 kaBP之间经历了以松为主的针叶林、山地针阔叶混交林、寒温性针叶林的多次相互演替;从6．98 kaBP开始,植被发生了转折性变化,森林植被迅速退化,以草本为主,此时开始受到人类活动的影响,人类活动表现在砍伐森林和种植农作物等方面.与植被演替相应的古气候可划分为五个大的阶段,包含多次冷暖、干湿旋回．

关键词：孢粉记录植被演替气候变化中更新世鹤庆盆地

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

大同盆地全新世以来孢粉特征和环境演变

引用

地球学报 2007年第6期28卷 535-540页

作者：范淑贤刘海坤周建柱童国榜毕志伟中国地质科学院水文地质环境地质研究所河北石家庄050061 河北省国土资源厅矿产资源储量评审中心河北石家庄050031

通过对大同盆地东水头剖面孢粉植物群分析研究,揭示了全新世气候环境的演变特征。结果表明:全新世以来草本植物始终占据优势地位,落叶阔叶植物和针叶植物虽然有时在木本植物中出现高峰,但仍然未形成稳定的森林景观。该区植被类型是以疏... 详细信息

通过对大同盆地东水头剖面孢粉植物群分析研究,揭示了全新世气候环境的演变特征。结果表明:全新世以来草本植物始终占据优势地位,落叶阔叶植物和针叶植物虽然有时在木本植物中出现高峰,但仍然未形成稳定的森林景观。该区植被类型是以疏林草原和草原植被为主,气候温暖偏干。全新世大暖期在8.5～4kaB.P.间,气候不稳定,气候波动明显,与黄土高原地区具有良好的可比性。

关键词：大同盆地全新世孢粉植物群

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国典型地区岩溶水资源及其生态水文特性

引用

地球学报 2006年第5期27卷 393-402页

作者：卢耀如张凤娥刘长礼童国榜张云中国地质科学院水文地质环境地质研究所石家庄050061

本文比较中国南北方岩溶水特性及其水资源。在中国南方主要岩溶地区,已知有3358条岩溶地下河系统,枯季流量有420×108m3/a,目前开发量只有8%~15%。而在中国北方岩溶地区主要形成平均流量在1~13m3/a、流域面积在几百至4000km2的近百个大... 详细信息

本文比较中国南北方岩溶水特性及其水资源。在中国南方主要岩溶地区,已知有3358条岩溶地下河系统,枯季流量有420×108m3/a,目前开发量只有8%~15%。而在中国北方岩溶地区主要形成平均流量在1~13m3/a、流域面积在几百至4000km2的近百个大的岩溶泉系统,其水资源开采量已达70%~80%。对一些典型中国岩溶生态水文特性,主要由6个方面,包括水环境、生态特性、母岩与土之间的特质、结构、生物—地质作用及孢粉等方面予以探讨。根据主要的生态条件和人工效应,对有关地质环境与石漠化予以评判。

关键词：岩溶水资源生态水文特性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：