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Journal articles on the topic 'Palynologie Pollen fossile'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

MacDonald, Glen M., and Kevin J. Edwards. "Holocene palynology: I principles, population and community ecology, palaeoclimatology." Progress in Physical Geography: Earth and Environment 15, no. 3 (1991): 261–89. http://dx.doi.org/10.1177/030913339101500303.

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The latter half of the past decade witnessed important progress in elucidating the principles of fossil pollen analysis and in the application of palynology to the study of palaeoecology and palaeoclimatology. Areas with particularly notable efforts include: 1) the theoretical consideration of the spatial representation of fossil pollen records and the relationships of pollen proportions to the abundance of contributing plant populations; 2) the quest for palynological data with increasingly fine temporal and spatial resolution; 3) the development of large databases of modern and fossil pollen

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2

Milne, Lynne A. "Tertiary palynology: Beaupreaidites and new Conospermeae (Proteoideae) affiliates." Australian Systematic Botany 11, no. 4 (1998): 553. http://dx.doi.org/10.1071/sb97013.

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Late Eocene proteaceous pollen assemblages of southern Australia containnumerous specimens of Conospermeae affiliation. As many of these aremorphologically confusing or nondescript, they have often been overlooked orgrouped within other fossil pollen species. In the western Eucla and MurrayBasins these fossil pollen types fall into two major categories: small speciesconventionally referred to unrelated New Zealand fossil taxa, and thoseincluded in Beaupreaidites elegansiformis Cookson 1950or Beaupreaidites spp. Integrated microscopy of singlefossil grains and a thorough investigation of extant

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3

Milne, Lynne A., and A. R. H. Martin. "Conospermeae (Proteoideae) pollen morphology and its phylogenetic implications." Australian Systematic Botany 11, no. 4 (1998): 503. http://dx.doi.org/10.1071/sb97035.

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Pollen morphological trends in modern taxa, the fossil pollen record, andcomparative palynology can be useful aids to taxonomy and indicators ofevolutionary lineages. In Conospermeae, each species and genus has a distinctpollen morphology character set, although individual characters may not betaxon-specific. Aperture form in Conospermeae may be consistent or diversewithin a genus, and has limited or no taxonomic value above the generic level;whereas with the exception of Beauprea Brongn. & Gris., sculptural type is consistent within a genus and often withinsubtribes. In the light of gener

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4

Toledo, Mauro B. de, Ortrud M. Barth, Cleverson G. Silva, and Marcia A. Barros. "Testing multivariate analysis in paleoenvironmental reconstructions using pollen records from Lagoa Salgada, NE Rio de Janeiro State, Brazil." Anais da Academia Brasileira de Ciências 81, no. 4 (2009): 757–68. http://dx.doi.org/10.1590/s0001-37652009000400013.

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Despite the indisputable significance of identification of modern analogs for Paleoecology research, relatively few studies attempted to integrate modern and fossil samples on paleoenvironmental reconstructions. In Palynology, this general pattern is not different from other fields of Paleoecology. This study demonstrates the practical application of modern pollen deposition data on paleoenvironmental reconstructions based on fossil pollen by using multivariate analysis. The main goal of this study was to use Detrended Correspondence Analysis (DCA) to compare pollen samples from two sediment c

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5

Romero, Ingrid C., Shu Kong, Charless C. Fowlkes, et al. "Improving the taxonomy of fossil pollen using convolutional neural networks and superresolution microscopy." Proceedings of the National Academy of Sciences 117, no. 45 (2020): 28496–505. http://dx.doi.org/10.1073/pnas.2007324117.

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Taxonomic resolution is a major challenge in palynology, largely limiting the ecological and evolutionary interpretations possible with deep-time fossil pollen data. We present an approach for fossil pollen analysis that uses optical superresolution microscopy and machine learning to create a quantitative and higher throughput workflow for producing palynological identifications and hypotheses of biological affinity. We developed three convolutional neural network (CNN) classification models: maximum projection (MPM), multislice (MSM), and fused (FM). We trained the models on the pollen of 16

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6

Nitychoruk, Jerzy, Jochen Hoefs, and Jürgen Schneider. "Klima-Änderungen im Pleistozän: Isotopenuntersuchungen an fossilen Seesedimenten aus dem Holstein-Interglazial Ost-Polens." E&G Quaternary Science Journal 49, no. 1 (1999): 21–34. http://dx.doi.org/10.3285/eg.49.1.02.

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Abstract. In Ost-Polen erbohrte Seesedimente mit einer Mächtigkeit bis zu 55 m (Ossówka-See) dokumentieren das ganze Holstein-Interglazial und die Anfangsperiode der Saale-Eiszeit. An ausgewählten Bohrkernen der Seen von Ossówka und Wilczyn wurden palaeobiologische (Malakofauna, Palynologie und Pflanzen-Makroreste) und Isotopen-Untersuchungen durchgeführt. Die für den längsten (55 m) und vollständigsten Bohrkern nahe der Ortschaft Ossówka bestimmten C- und O-Isotopenwerte betragen: δ13C: Minimalwerte bis -6,4 ‰ für Ablagerungen am Beginn des Interglazials, Maximalwerte bis +10,0‰ für Ablagerun

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7

Alley, Neville F., and Stephen R. Hicock. "The stratigraphy, palynology, and climatic significance of pre-middle Wisconsin Pleistocene sediments, southern Vancouver Island, British Columbia." Canadian Journal of Earth Sciences 23, no. 3 (1986): 369–82. http://dx.doi.org/10.1139/e86-039.

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Palynological investigations of organic-rich sediments from the Muir Point Formation and basal Cowichan Head Formation on southernmost Vancouver Island have identified seven pollen zones. Modern pollen spectra from the extant vegetation in southwestern British Columbia aid in interpreting paleoenvironments from the fossil pollen assemblages. Six of the pollen zones (MP-1, MP-2, MP-3, MP-4, CB-3, and CB-4) are from the Muir Point Formation and are beyond the range of 14C dating. They record evidence of vegetation and climate during either the last interglacial or penultimate interglacial (or so

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8

Matley, Kia A., JM Kale Sniderman, Andrew N. Drinnan, and John C. Hellstrom. "Late-Holocene environmental change on the Nullarbor Plain, southwest Australia, based on speleothem pollen records." Holocene 30, no. 5 (2020): 672–81. http://dx.doi.org/10.1177/0959683619895589.

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Fossil pollen from two stalagmites is examined to reconstruct a c. 2400-year history of vegetation change on the Nullarbor Plain. Environmental changes are reflected by variation in chenopod species abundance, and by a peak in woody taxa between 1000 and 800 years ago which is interpreted as evidence of increased moisture conditions associated with a positive phase of the Southern Annular Mode. While no strong palynological signal is observed at the time of European colonization of Australia, a significant change occurs in the past 40 years, which is interpreted as a vegetation response to a r

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9

Agung Suedy, Sri Widodo, Muhadiono Muhadiono, Supiandi Sabiham, and Ibnul Qoyim. "Fosil Polen Mangrove Berumur Pliosen Dari Formasi Tapak Daerah Kedung Randu, Banyumas." Bioma : Berkala Ilmiah Biologi 14, no. 1 (2012): 17. http://dx.doi.org/10.14710/bioma.14.1.17-24.

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Thirty sediment samples had been taken from the Tapak Formation of Kedung Randu areas, Banyumas, to reconstruct the diversity of mangrove flora from this area the past. This samples were processed for palynological slides used standard palynology preparation method. The microscopic identification of palynomorphs were done to identify taxa of paleoflora. Fifty-six types of pollen and spores fossils had been identified and 22 types were mangrove pollen-spores fossils. This fossils could be grouped into major mangrove (Zonocostites ramonae/Rhizophora type, Spinizonocolpites echinatus/Nypa frutica

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10

Nordlund, Christer. "Peat bogs as geological archives: Lennart Von Post et al., and the development of quantitative pollen analysis during World War I." Earth Sciences History 33, no. 2 (2014): 187–200. http://dx.doi.org/10.17704/eshi.33.2.b9058l3153638715.

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In 1916, at the 16th Convention of Scandinavian Naturalists in Kristiania (Oslo), a novel quantitative method for the analysis of postglacial vegetation and climate history was presented. The idea behind the method, later known as pollen analysis, was to utilize peat bogs as geological archives and fossil tree pollen stored in such archives as data. In the historiography of palynology, this lecture by the Swedish geologist Lennart von Post (1884-1951) remains a classic. Pollen from postglacial deposits had indeed been used before, but the approach represented a breakthrough through the launch

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11

Frederiksen, N. O., T. A. Ager, and L. E. Edwards. "Palynology of Maastrichtian and Paleocene rocks, lower Colville River region, North Slope of Alaska." Canadian Journal of Earth Sciences 25, no. 4 (1988): 512–27. http://dx.doi.org/10.1139/e88-051.

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Outcrops of Maastrichtian rocks are rare on the North Slope of Alaska, and it is even more unusual to find outcrops of Maastrichtian and Paleocene age in the same vicinity. In general, Late Cretaceous and Paleogene rocks have not been well dated in published papers pertaining to northern Alaska. In this article, we describe palynomorph assemblages from 20 outcrop samples taken from nine localities along the lower Colville River and nearby areas. The latest Cretaceous palynomorph assemblages that are from marine rocks contain late Campanian or Maastrichtian dinoflagellate cysts; however, these

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12

Guiot, Joël. "A Method for Palaeoclimatic Reconstruction in Palynology Based on Multivariate Time-Series Analysis." Géographie physique et Quaternaire 39, no. 2 (2007): 115–25. http://dx.doi.org/10.7202/032596ar.

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ABSTRACT A method based on multiple regression, canonical correlation analysis and the Kalman filter is developed with a view to producing a reliable reconstruction of climate from pollen spectra. The study region is the southern France, where traditional analytical techniques are unsatisfactory due to the heavy influence of human activity and the existence of a complex climate. The first stage of the proposed method is the same as the standard techniques in which a spatial network of 36 sites with recent pollen and climate data were analyzed by regression techniques. But since the recent data

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13

Mathewes, Rolf W., David R. Greenwood, and Renée L. Love. "The Kanaka Creek fossil flora (Huntingdon Formation), British Columbia, Canada — paleoenvironment and evidence for Paleocene age using palynology and macroflora." Canadian Journal of Earth Sciences 57, no. 3 (2020): 348–65. http://dx.doi.org/10.1139/cjes-2018-0325.

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Paleogene sediments of the Huntingdon Formation, a correlative to the Chuckanut Formation of neighbouring Washington State, USA, are exposed in the Greater Vancouver area, British Columbia, Canada. Palynology and plant macrofossils suggest the Kanaka Creek section is Paleocene rather than Eocene in age. Detrital zircon dating is less decisive, yet indicates the Kanaka rocks are no older than Maastrichtian. Analyses of plant macro- and micro-fossils suggest an early to middle Paleocene age for the Kanaka fossil flora. Paleocene indicators include macrofossils such as Platanus bella, Archeampelo

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14

Pacyna, Grzegorz. "Critical review of research on the Lower Jurassic flora of Poland." Acta Palaeobotanica 53, no. 2 (2013): 141–63. http://dx.doi.org/10.2478/acpa-2013-0015.

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ABSTRACT The Lower Jurassic plant macrofossils of Poland are poorly known. Relatively rich sources of fossils are found in only a few outcrops in the Holy Cross Mountains. Other described plant remains come from drill cores taken from most areas of Poland, but as a rule these are single specimens. The only professional descriptions of Lower Jurassic macroflora are papers by Raciborski, Makarewiczówna, and a team of researchers consisting of Reymanówna, Barbacka, Ziaja, and Wcisło-Luraniec. Raciborski’s fossil collection is still available for research and revision. Such work is in progress. Th

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15

Grauvogel-Stamm, Léa, Gaëtan Guignard, and Charles H. Wellman. "Studies of spore/pollen wall ultrastructure in fossil and living plants: A homage to Bernard Lugardon, a talented palynologist." Review of Palaeobotany and Palynology 156, no. 1-2 (2009): 1. http://dx.doi.org/10.1016/j.revpalbo.2009.03.003.

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16

Koppelhus, E. B., and D. R. Braman. "Upper Cretaceous palynostratigraphy of the Dry Island areaThis article is one of a series of papers published in this Special Issue on the theme Albertosaurus." Canadian Journal of Earth Sciences 47, no. 9 (2010): 1145–58. http://dx.doi.org/10.1139/e10-068.

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The overall palynology of the upper Horseshoe Canyon Formation to lower Scollard Formation within the Edmonton Group is reviewed providing new insights into biostratigraphic relationships for the interval, including the recognition of unconformities in the stratigraphic package. The palynomorph recovery from the Horseshoe Canyon Formation and overlying units documents a number of significant events that allow the subdivision of the section. The Albertosaurus bonebed occurs within the lower Maastrichtian portion of the Edmonton Group. The bonebed is situated just below the base of the Scollardi

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17

Zazula, Grant D. "Can Palynology be used for Reconstructing the Evolutionary History of Maize Agriculture?" NEXUS: The Canadian Student Journal of Anthropology 14, no. 1 (2000). http://dx.doi.org/10.15173/nexus.v14i1.166.

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The lack of archaeological or macrobotanical evidence that directly links wild teosinte grass with early domesticated maize requires the exploration of alternative methodologies to document this evolutionary transition. The morphological characteristics and measurements for maize, teosinte and Tripsacum pollen are presented to determine if they display sufficient differentiation to be distinguished in fossil pollen records. Analysis of the data reveals a lack of distinguishing morphological characteristics between the pollen grains of these taxa and prevents palynology from be an effective met

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18

Náfrádi, Katalin, Elvira Bodor, Tünde Törőcsik, and Pál Sümegi. "Vegetation history reconstructed from anthracology and pollen analysis at the rescue excavation of the MO Motorway, Hungary." Open Geosciences 3, no. 4 (2011). http://dx.doi.org/10.2478/s13533-011-0036-0.

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AbstractThe significance of geoarchaeological investigations is indisputable in reconstructing the former environment and in studying the relationship between humans and their surroundings. Several disciplines have developed during the last few decades to give insight into earlier time periods and their climatic conditions (e.g. palynology, malacology, archaeobotany, phytology and animal osteology). Charcoal and pollen analytical studies from the rescue excavation of the MO motorway provide information about the vegetation changes of the past. These methods are used to reconstruct the environm

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19

"Climatic evolution of the eastern Canadian Arctic and Baffin Bay during the past three million years." Philosophical Transactions of the Royal Society of London. B, Biological Sciences 318, no. 1191 (1988): 645–60. http://dx.doi.org/10.1098/rstb.1988.0028.

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The outer east coast of Baffin Island is characterized by a series of sedimentary forelands. These contain a variety of litho- and biofacies associated with glacial marine and marine deposition into sea levels higher than those of the present. These high relative sea levels were associated with glacial isostatic loading and unloading of the crust by the NE sector of the Laurentide Ice Sheet. On the basis of amino acid epimerization ratios, eleven chronologically distinct units are delimited. The youngest unit is less than or equal to 10 ka, but all others are at or beyond the limits of radioca

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20

Thuan, Dinh Van, Ngo Thi Dao, Mai Thanh Tan, Le Duc Luong, Trinh Thi Thanh Ha, and Nguyen Van Tao. "Biostratigraphical characteristics of Late Miocene coaly sediments in the Southeastern Red River Delta." VNU Journal of Science: Earth and Environmental Sciences 35, no. 2 (2019). http://dx.doi.org/10.25073/2588-1094/vnuees.4394.

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Abstract: Late Miocene biostratigraphy of coaly sediments in the Southeastern Red River Delta are basically interpreted from the analyses of foraminifera, palynology with referencing analyses of petrographic thin section, grain-size and physicochemistry, from the samples of 3 boreholes. Late Miocene/Pliocene stratigraphical boundary is marked by the appearances of planktonic foraminifera as Neogloboquadrina acostaensis; Globigerinoides ruber, G. bulloides, G. conglobatus. Sedimentary environments were: tidal flats in the Earlier of Late Miocene; tidal flats and coastal marshes in the Middle of

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