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  • Quaternary pollen analysis : recent progress in palaeoecology and palaeoclimatology
  • Bibliography ; Climate reconstruction ; Methodology ; Model ; Palaeo-ecology ; Palaeoclimatology ; Palynology ; Pollen analysis ; Quaternary
  • During the last decade Quaternary pollen analysis has developed towards improved pollen-taxonomical precision, automated pollen identification and more rigorous definition of pollen assemblages zones. There have been significant efforts to model
  • the spatial representation of pollen records in terms of past vegetation patterns. The AA. review the difficulties in matching modelled post-glacial plant migration patterns with pollen-based palaeorecords and discuss the potential of DNA analysis of pollen
  • Prospects for Quaternary pollen research in China.
  • Development in pollen research is needed in three directions. Firstly, mastery of vegetational knowledge, identification of regularities of pollen dispersal in various geographical conditions| secondly, improvement in techniques of pollen analysis
  • , using the absolute pollen concept to rationalise zonation work, and in numerical techniques| thirdly, in application recognise the benefit of infiltration and coordination with related sciences. (TNC).
  • Surface pollen in the east of Qaidam Basin
  • Aridity ; Beijing ; Biogeography ; China ; Climate ; Correlation ; Palaeo-environment ; Pollen ; Pollen analysis ; Principal components analysis ; Quaternary ; Vegetation
  • Analyse en composantes principales ; Analyse pollinique ; Aridité ; Beijing ; Biogéographie ; Chine ; Climat ; Corrélation ; Paléo-environnement ; Pollen ; Quaternaire ; Végétation
  • Pollen analysis of 23 surface samples in the east of Qaidam Basin reveals the characteristics of pollen assemblages and their relationships with vegetation and climate. Depending on the aridity, the vegetation communities are divided into 4 groups
  • Pollen analysis of snow samples from the North Pole region
  • Arctic Region ; Atmospheric circulation ; Northern Russia ; Pollen ; Pollen analysis ; Russia ; Sea ice ; Snow
  • Analyse pollinique ; Arctique ; Circulation atmosphérique ; Glace de mer ; Neige ; Pollen ; Russie ; Russie du Nord
  • Analyse pollinique d'échantillons de neige de glace de mer collectés en avril-mai 2002 par les membres de la Station Polaire de Russie du Nord-2001. En déterminant les espèces de plantes représentées par ces pollens et spores, on peut obtenir des
  • Rapid climatic change in coastal Southern California inferred from pollen analysis of San Joaquin marsh
  • C14 dating ; California ; Climatic variation ; Paleo-environment ; Palynology ; Pollen diagrams ; Quaternary ; United States
  • Pollen analysis and five radiocarbon dates of a 687-cm core provide a detailed chronology of environmental change in a marsh at the head of Newport Bay, Orange County, California. Results and discussion.
  • Pollen representation, source area, and basin size: toward a unified theory of pollen analysis
  • The concepts of pollen source area and of production and dispersal biases in pollen representation are quantified by means of a simple theoretical model. Source areas and relative pollen representation are shown to depend on basin size according
  • to functions that describe the amount of pollen remaining airborne at increasing distances from single pollen sources. The integrated form of Sutton's equation for particle dispersal from a ground-level source gives usefull approximations applicable to pollen
  • The use of micromorphology in soil pollen analysis. The interpretation of the pollen content of slope deposits in Galicia, Spain
  • Galicia ; Holocene ; Infiltration ; Lateglacial ; Micromorphology ; Palaeo-ecology ; Palaeo-environment ; Palynology ; Pollen diagram ; Quaternary ; Slope deposit ; Soil ; Spain
  • Comparison of the sequence of pollen associations of soil profiles with pollen zones of reference diagrams offers palyno-ecological information, relevant for reconstruction of landscape ecological development. Interpretation of soil pollen
  • associations requires knowledge of the processes of infiltration and conservation of pollen grains in the soil material. Micromorphology is an important technique to investigate these processes. This is demonstrated in a case study of polycyclic slope deposits
  • Modern pollen-rain characteristics of tall terra firme moist evergreen forest, southern Amazonia
  • Amazonie ; Bolivie ; Forêt tropicale ; Palynologie ; Paléo-écologie ; Pollen ; Quaternaire ; Taxonomie ; Variabilité interannuelle ; Variation spatiale ; Zone intertropicale
  • Amazon Basin ; Bolivia ; Interannual variability ; Palaeo-ecology ; Palynology ; Pollen ; Quaternary ; Spatial variation ; Taxonomy ; Tropical rain forest ; Tropical zone
  • were performed to assess the extent of spatial and inter-annual variability in the pollen rain, whilst statistically distinctive data were identified using Principal Components Analysis (PCA). Comparisons which the floristic and basal area data
  • Here, the AA. present the first modern pollen-rain data for tall terra firme moist evergreen Amazon forest, collected between 1999 and 2001 from artificial pollen traps in Noel Kempff Mercado National Park (NE Bolivia). Spearman's rank correlations
  • of the plot enabled the degree to which taxa are over/under-represented in the pollen rain to be assessed.
  • Alps (The) ; Bavaria ; Doline ; Germany ; Glacial features ; Glacier fluctuation ; Holocene ; Palaeogeography ; Palynology ; Pollen diagram ; Stratigraphy
  • The article deals with the doline, the Holocene, the pollen analysis and the Schneeferner glacier of the Zugspitzplatt. The paper describes the pollen analysis in high mountains, the closer pollen collection area, the pollen conversation, the other
  • pollen spectra, the advisement to dating of the pollen and vegetation history and the humus colluviums in the doling. This is a contribution for discussion of the post-glacial active glacier in Wettersteingebirge. - (IfL)
  • Arid area ; Botany ; China ; Climate ; Palaeo-environment ; Pollen analysis ; Sedimentary ; Vegetation
  • Pollen analysis as a technique for reconstructing former vegetation by means of fossil pollen grains preserved in the sediments was ´born´ in 1916, when Swedish geologist Lennart von Post (1884-1951) presented the first percentage pollen diagram
  • at the meeting of the Swedish Geological Society, held in Kristiana (now Oslo). A combination of the following unique features makes pollen analysis such a useful tool for palaeoenvironmental studies: (a) plants produce pollen in great quantities; (b) pollen
  • grains are easily dispersed by wind, water or insects and occur in almost all types of sediments on all continents except Antarctica; (c) the outer coat of pollen grain build of the biopolymer sporopollenin is extremely resistant to mechanical
  • and chemical agents and well preserved even in very old sediments; (d) a great quantity of pollen grains representing past vegetation which grew around the sampling site can be easily recovered from fossil sediments; (e) most of the pollen grains recovered from
  • Quaternary deposits can be identified to the species, family level and the resulting pollen assemblage allows statistical treatment. - (IfL)
  • Pollen analysis of hyena coprolites and sediments from Equus Cave, Taung, Southern Kalahari (South Africa) in XII INQUA Congress Issue.
  • Tropical climatic variation on the Pacific slopes of the Ecuadorian Andes based on a 25,000-year pollen record from deep-sea sediment core Tri 163-31B
  • Climatic variation ; Core sampling ; Ecuador ; Isotope analysis ; Marine sediment ; Oxygen ; Palaeogeography ; Pollen analysis ; Tropical zone
  • The general correspondence between pollen and oxygen isotope variations in Tri 163-31B suggests that tropical climatic variations in the northern Andes were basically coherent with northern hemisphere glacier variations.
  • The global pollen database in biogeographical and palaeoclimatic studies
  • Amérique du Nord ; Base de données ; Biogéographie ; Canada ; Carbone ; Cartographie ; Colonisation végétale ; Diagramme pollinique ; Dynamique de la végétation ; Holocène ; Monde ; Palynologie ; Paléo-écologie ; Paléoclimatologie ; Pollen
  • Biogeography ; Canada ; Carbon ; Cartography ; Data base ; Holocene ; North America ; Palaeo-ecology ; Palaeoclimatology ; Palynology ; Plant colonization ; Pollen ; Pollen diagram ; Taxonomy ; Vegetation dynamics ; World
  • of the perceived limitations of pollen data being circumvented by use at the appropriate level of analysis.
  • In this review the AA. discuss some recent work that has been accomplished using the North American Pollen Database (NAPD). After briefly summarizing some of the more standard uses, including plotting the migration of plant taxa, or mapping past
  • Late Holocene climatic changes in western equatorial Africa inferred from pollen from Lake Sinnda, southern Congo
  • Aridity ; C 14 dating ; Climatic variation ; Congo ; Holocene ; Lacustrine sediment ; Palaeoclimate ; Palynology ; Pollen diagram
  • Pollen analysis of 2 cores from the Lake Sinnda, located in one of the driest areas of the southern Congo, reveals a history of vegetation and climate in this region during the past 5000 yr. A major change centered around 3000-2500 yr B.P
  • . is indicated by an abrupt decrease in forest pollen and by a corresponding increase in grassland pollen. Concurrent drying up of the lake shows that climate, in particular aridity, was the major cause of this change. The aridity predates agriculture marked
  • by pollen of the oil palm at Lake Sinnda.
  • New insights into the vegetation history of this region are provided by calculations of pollen influx and by the use of linear discriminant analysis to separate Picea glauca and P. mariana pollen. Three major pollen zones are identified: (1) a basal
  • herb zone, characterized by high percentages of Cyperaceae, Gramineae, Salix, and Artemisia, and low total pollen influx| (2) a shrub Betula zone with increased total pollen influx and very high percentages of Betula pollen, predominantly in the size
  • range of B. nana and B. glandulosa| and (3) an Alnus zone dominated by Alnus pollen.
  • Numerical analysis of modern and fossil pollen data from the Tibetan plateau
  • China ; Discriminant analysis ; Palaeobiogeography ; Palynology ; Plateau ; Pollen diagram ; Tibet ; Vegetation
  • This study applies a number of multivariate numerical techniques in the analysis of modern and fossil pollen data for the purpose of paleovegetational reconstruction in the Tibetan Plateau. Modern pollen spectra from 227 sampling sites
  • in the Tibetan Plateau were classified into groups using cluster analysis and detrended correspondence analysis. By comparing the quantitatively derived groups with local vegetation types at sampling locations, the modern pollen spectra were assigned into 5 major
  • vegetation types : shrubland, forest, meadow, steppe, and desert. These were used as a priori groups for discriminant analysis. The discriminant functions were then applied to a fossil pollen record from Yidun Glacial Lake near the Sichuan-Tibet border
  • to reconstruct the major pattern of vegetational changes since the last glacial maximum. The results demonstrate that discriminant analysis is a useful technique for reliable reconstruction of paleovegetation in the Tibetan Plateau.
  • A 14,000-year pollen record from Sithylemenkat Lake, North-Central Alaska
  • This pollen analysis provides the first Holocene vegetational history for the Kanuti Flats of north-central Alaska. Basal samples contain a curious and unusual combination of tundra and boreal taxa. This pattern suggests that the Holocene history
  • Macrofossil plants and pollen assemblages on the last glacial in Sanjiang plain.
  • Analysis of fossil plants and pollen spores reveals that the climate of Sanjiang plain in the late Pleistocene was humid and cold with annual precipitation higher than that of present It was covered with cold temperature needleleaf deciduous forest
  • Pollen analysis of a Late-Glacial and Holocene sediment core from Mono Lake, Mono County, California
  • C 14 dating ; California ; Climatic variation ; Holocene ; Lake level ; Lateglacial ; Palaeo-environment ; Palynology ; Pollen diagram ; Quaternary ; Tephrochronology ; United States of America
  • Pollen analysis of a 752-cm core from Mono Lake, California, indicates generally high lake levels 11,600-7000 C 14 yr B.P., moderate lake levels until ca. 4000 C 14 yr B.P., and fluctuating levels to the present. Drying events, with lake levels near
  • or below the historic minimum are dated ca. 8800, 4000, 2400, and 1100 C 14 yr B.P.. Chronologic control is provided by 6 radiocarbon dates and 6 volcanic ashes. The pollen-based reconstructions of climate are generally cooler and wetter than today
  • Pollen analysis of a late Pliocene and early Pleistocene section from the Gubik Formation of Arctic Alaska
  • A 14-m-thick section of marine and fluviatile sediments, exposed in bluff near Ocean Point on the Colville River, has been studied by means of pollen analysis. Pollen from the marine sediments, of probable late Pliocene age, suggests an environment
  • similar to that of present-day. Pollen floras from the overlying fluvial strata, of early or middle Pleistocene age, record predominantly herbaceous taxa indicating tundra conditions probably more severe than those of the present day. These deposits were