Pollen analysis of the Saint-Ursin peat bog (Mayenne, Massif armoricain, Northwest France) : detection of late glacial and Holocene sequences.

2003 ◽  
Vol 27 (1) ◽  
pp. 55-66
Author(s):  
Delphine Barbier ◽  
Lionel Visset
Keyword(s):  
Pollen Analysis ◽  
Late Glacial ◽  
Peat Bog ◽  
Late Glacial And Holocene

scholarly journals Late Glacial and Holocene plant cover in Węgliny, Lubsza Plain, south-west Poland, based on pollen analysis

2013 ◽  
Vol 53 (2) ◽  
pp. 191-233 ◽  
Author(s):  
Aleksandra Jurochnik ◽  
Dorota Nalepka
Keyword(s):  
Pollen Analysis ◽  
Plant Cover ◽  
Late Glacial ◽  
Anaerobic Sediments ◽  
The North ◽  
South West ◽  
Pollen Diagrams ◽  
Laacher See Tephra ◽  
Late Glacial And Holocene

ABSTRACT Late Glacial (since Oldest Dryas) and Holocene (to Subatlantic) changes of vegetation at the Węgliny site (south-west Poland) are reconstructed based mainly on pollen analysis of five cores from the palaeobasin (anaerobic sediments). The chronology of the described events is based on palynological comparison with the Lubsza Plain environs, based on LPAZs from several published pollen diagrams on 14C data, and multiple cryptotephra levels determined in the Węgliny profiles. The Węgliny record integrates well into the north European Holocene and Late Glacial biostratigraphic framework. The Węgliny site is the next (fourth) locality in Poland where the Laacher See Tephra (LST) horizon within the Allerød chronozone was identified.

scholarly journals Transformation of Lake Ecosystem into Peat Bog and Vegetation History Based on Durne Bagno Mire (Lublin Polesie, E Poland)

2007 ◽  
Vol 29 (-1) ◽  
pp. 23-43 ◽  
Author(s):  
Krystyna Bałaga
Keyword(s):  
Vegetation History ◽  
Chemical Elements ◽  
Late Glacial ◽  
Unique Element ◽  
Peat Bogs ◽  
Lake Ecosystem ◽  
Peat Bog ◽  
Mineral Material ◽  
Late Glacial And Holocene ◽  
Almost All

Transformation of Lake Ecosystem into Peat Bog and Vegetation History Based on Durne Bagno Mire (Lublin Polesie, E Poland)In this paper, the history of Durne Bagno, i.e. the largest peat bog in the Lublin Polesie, is shown. Peat bogs are a unique element of the Polesie landscape. They occur mostly in the subregion of the Łęczna-Włodawa Lake District occupying 1.07% of its area. They fill basin-shaped depressions without outflow, often in the immediate vicinity of dystrophic lakes. Based on interdisciplinary research, the changes of vegetation cover and the Durne Bagno lake-mire ecosystem in the Late Glacial and Holocene are presented. The environmental conditions are reconstructed from pollen analysis, detailed identification of algae ofPediastrumgenus and chemical composition of deposits, together with the results of Cladocera analysis. The distribution of archaeological artefacts in the surroundings of Durne Bagno peat bog gives the view on the intensity of settlement in this area. The duration of the limnic and mire stages during the development of the ecosystem was different in different parts of the examined depression. In its central part the limnic stage lasted about 8000 years and included the period from the Late Glacial to the middle Holocene (to about 6000 BP). It is represented by 7 pollen zones and 6 chemical zones. The mire stage contained a part the Atlantic period and on the Subboreal and Subatlantic periods. It is represented by 4 pollen zones and 5 chemical zones. Limnic and mire deposits differ widely in the concentrations of chemical elements. The contents of mineral material and almost all analyzed elements in limnic deposits are high. These deposits are characterized by positive correlation between the contents of Zn and Cr and the frequency of Cladocera fauna. Peat contains very low amount of mineral material. The contents of Ca, Sr and Ba are rather high in sedgemoss peat. The concentrations of these elements decrease upwards due to oligotrophic processes and sedentation of sedge-Eriophorum-Sphagnumpeat. Peat succession was modified by pastoral economy of prehistoric man.

Late Glacial and Holocene vegetation history in the southern part of Transylvania (Romania): pollen analysis of two sequences from Avrig

2005 ◽  
Vol 21 (1) ◽  
pp. 49-61 ◽  
Author(s):  
Ioan Tantau ◽  
Maurice Reille ◽  
Jacques-Louis de Beaulieu ◽  
Sorina Farcas
Keyword(s):  
Pollen Analysis ◽  
Vegetation History ◽  
Late Glacial ◽  
Late Glacial And Holocene

Pollen Analysis of a Late-Glacial and Holocene Sediment Core from Mono Lake, Mono County, California

1999 ◽  
Vol 52 (2) ◽  
pp. 243-249 ◽  
Author(s):  
Owen K. Davis
Keyword(s):  
Pollen Analysis ◽  
Vegetation Change ◽  
Late Glacial ◽  
Mono Lake ◽  
Early Holocene ◽  
Summer Drought ◽  
Lake Levels ◽  
Radiocarbon Dates ◽  
Spring Runoff ◽  
Late Glacial And Holocene

Pollen analysis of a 752-cm core from Mono Lake, Mono County, California indicates generally high lake levels 11,600–7000 14C yr B.P., moderate lake levels until ca. 4000 14C 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 14C yr B.P. Chronologic control is provided by six radiocarbon dates and six volcanic ashes. The rate of upland vegetation change is greatest 11,000, 4000, and 1130 14C yr B.P. Juniperus and Sequoaidendron pollen declines 11,000 yr B.P., marking the transition from late-glacial juniper woodland to Holocene steppe. High values (5–20%) of Sequoaidendron pollen are unique to this study and may indicate the presence of these trees east of the Sierra crest. The pollen-based reconstructions of climate are generally cooler and wetter than today, with relatively dry but cool climate during the early Holocene. The contrast between higher lake levels and more arid vegetation during the early Holocene can be explained by insolation-driven seasonality. Greater summer insolation produced summer drought, but lower winter insolation led to greater snowpack, greater spring runoff, and higher lake levels. Increased Artemisia and other Compositae pollen percentages mark the establishment of modern vegetation ca. 2000 14C yr B.P. During the late Holocene, the pollen-based reconstructions of climate generally match the Mono Lake fluctuations proposed by Stine (1990), but fewer fluctuations are recorded.

LATE GLACIAL AND HOLOCENE GLACIER FLUCTUATIONS IN THE CORDILLERA BLANCA, PERUVIAN ANDES

2016 ◽  
Author(s):  
Nathan Stansell ◽  
◽  
Donald T. Rodbell ◽  
Joseph M. Licciardi ◽  
Mark B. Abbott ◽  
...  
Keyword(s):  
Late Glacial ◽  
Cordillera Blanca ◽  
Peruvian Andes ◽  
Glacier Fluctuations ◽  
Late Glacial And Holocene

Mollusc successions reveal northward postglacial shifts of Alpine species ranges (Bohemian Massif, Czech Republic)

The Holocene ◽  
2021 ◽  
pp. 095968362110116
Author(s):  
Lucie Juřičková ◽  
Jakub Menšík ◽  
Jitka Horáčková ◽  
Vojen Ložek
Keyword(s):  
Czech Republic ◽  
Bohemian Massif ◽  
Late Glacial ◽  
Glacial Refugia ◽  
Land Snails ◽  
Glacial Refugium ◽  
Local Climate ◽  
The Alps ◽  
Species Groups ◽  
Late Glacial And Holocene

The Alps are an important hotspot of species diversity and endemism, as well as a presumed glacial refugium of several species’ groups including land snails. The recent ranges of Alpine endemics are well known, but their fluctuations during the postglacial period mirroring local climate changes are understudied. By analysing five Late Glacial and Holocene mollusc successions from two areas in the southernmost part of the Bohemian Massif (Czech Republic) situated about 100 km north of the Alps, we reveal details of these fluctuations. The Alpine endemic rocky dweller Chilostoma achates had reached the southern part of the Bohemian Massif already in the Late Glacial and disappeared in the Mid-Holocene canopy forest optimum. On the contrary, the northern boundaries of Alpine canopy forest epigeic snails extended further north than today at the turn of the Middle and Late-Holocene, pointing to a more favourable forest microclimate. The earliest known occurrences of several temperate canopy forest central European species, especially Causa holosericea and Discus perspectivus, imply the role of different areas in the Alps as their glacial refugia.

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