Late Glacial and Holocene in the south of Western Siberia: geochemical indices and pollen data in Kyrtyma Lake sediments

AbstractIn the southern Argentine Andes, ten advances of valley glaciers were used to reconstruct the late-glacial and Holocene glacier history. The accumulation areas of these glaciers lie in the Precordillera and are thus independent of fluctuations of the South Patagonian Icefield. Like the Viedma outlet glacier, the valley glaciers advanced three times during late-glacial time (14,000–10,000 yr B.P.). The youngest advance correlates with the Younger Dryas Stade, based on two minimum AMS14C dates of 9588 and 9482 yr B.P. The second oldest advance occurred before 11,800 yr B.P. During the first half of the Holocene, (ca. 10,000–5000 yr B.P.), advances culminated about 8500, 8000–7500, and 5800–5500 yr B.P. During the second half of the Holocene, advances occurred between ca. 4500 and 4200 yr B.P., as well as between 3600 and 3300 yr B.P. In the Rı́o Cóndor valley three subsequent advances have been identified.

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Chironomidae (Diptera) and Postglacial Climate at Marion Lake, British Columbia, Canada

Quaternary Research ◽

10.1016/0033-5894(87)90052-4 ◽

1987 ◽

Vol 27 (1) ◽

pp. 89-102 ◽

Cited By ~ 42

Author(s):

Ian R. Walker ◽

Rolf W. Mathewes

Keyword(s):

British Columbia ◽

North America ◽

Lake Sediments ◽

Sediment Core ◽

Late Glacial ◽

Pollen Data ◽

The Holocene ◽

Stratified Lakes ◽

Chironomid Assemblages ◽

Chironomid Community

AbstractChironomid (midge) remains analyzed from an 8.95-m-long sediment core from Marion Lake reveal successional changes over the last 12,000 yr since deglaciation. A late-glacial Heterotrissocladius-dominated association characterizes the earliest sediments. Succeeding this community, at the onset of the Holocene, is a Tanytarsini-dominated assemblage. The transition between these communities occurs during a time of rapid climatic amelioration, preceding an early Holocene xerothermic interval. The late-glacial fossil fauna is suggestive of more northerly affinities. Similar sequences have been reported in late-glacial lake sediments elsewhere in North America and in Europe. The composite picture of these chironomid assemblages suggests the gradual retreat of a formerly widely distributed, cold stenothermous fauna. The response of the chironomid community accords well with paleoclimatic inferences based on pollen data at the lake. Subsequent postglacial changes are less pronounced and most are probably attributable to the gradual shallowing of the basin. Chironomid remains from shallow, weakly stratified lakes may yield valuable paleoclimatological data.

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Radiocarbon chronology of glacial lake sediments in the Retezat Mts (South Carpathians, Romania): a window to Late Glacial and Holocene climatic and paleoenvironmental changes

Central European Geology ◽

10.1556/ceugeol.52.2009.3-4.2 ◽

2009 ◽

Vol 52 (3-4) ◽

pp. 225-248 ◽

Cited By ~ 27

Author(s):

Enikõ K. Magyari ◽

Mihály Braun ◽

Krisztina Buczkó ◽

Zoltán Kern ◽

Péter László ◽

...

Keyword(s):

Lake Sediments ◽

Late Glacial ◽

Glacial Lake ◽

Paleoenvironmental Changes ◽

Late Glacial And Holocene ◽

Radiocarbon Chronology

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Chronology of Vegetation and Paleoclimatic Stages of Northwestern Russia During the Late Glacial and Holocene

Radiocarbon ◽

10.1017/s0033822200019317 ◽

1999 ◽

Vol 41 (1) ◽

pp. 25-45 ◽

Cited By ~ 37

Author(s):

Kh A Arslanov ◽

L A Saveljeva ◽

N A Gey ◽

V A Klimanov ◽

S B Chernov ◽

...

Keyword(s):

Lake Sediments ◽

Tree Species ◽

Vegetation History ◽

Great Majority ◽

Late Glacial ◽

Paleoclimatic Changes ◽

Reference Sections ◽

Late Glacial And Holocene ◽

Northwestern Russia ◽

Geochronological Scale

We have studied 6 reference sections of bog and lake sediments in the Leningrad and Novgorod provinces to develop a geochronological scale for vegetational and paleoclimatic changes in northwestern Russia during the Late Glacial and Holocene. Every 10-cm layer along the peat and gyttja sections (4–8.5 m thick) was investigated palynologically and the great majority of them were radiocarbon dated. Using the data obtained, standard palynological diagrams were plotted and vegetation history reconstructed. The palynozones indicated on the diagrams were related to the climatic periods and subperiods (phases) of the Blytt-Sernander scheme. On the basis of 230 14C dates obtained, we derived the geochronology of climatic periods and phases, as well as the chronology for the appearance and areal distribution of forest-forming tree species. The uppermost peat layers were dated by using the “bomb effect”. We compared the stages of Holocene vegetation and paleoclimatic changes discovered for the Leningrad and Novgorod provinces with the those obtained for Karelia, which we had studied earlier using the same methodology.

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Early and Middle Holocene Paleoclimates in the South Western Desert of Egypt - The World Before Unification

Studia Quaternaria ◽

10.2478/squa-2013-0013 ◽

2013 ◽

Vol 30 (2) ◽

pp. 125-133 ◽

Cited By ~ 6

Author(s):

Romuald Schild ◽

Fred Wendorf

Keyword(s):

Late Glacial ◽

Field Work ◽

Climatic Changes ◽

Western Desert ◽

The South ◽

Middle Holocene ◽

The World ◽

Chronological Sequence ◽

Late Glacial And Holocene ◽

Early And Middle Holocene

Abstract In the field seasons of 1990 to 2008 the Combined Prehistoric Expedition conducted an extensive archaeological, archaeozoological, archaeobotanical and geomorphological field work at more than a hundred sites in the Nabta, Kiseiba, El Kortain, Gebal El Beid, Gebel Ramlah and Berget El Sheb Areas, South Western Desert of Egypt. The research has helped to develop a long chronological sequence of Late Glacial and Holocene climatic changes in the region. The climatic sequence has been supported by more than 300 14C and OSL assays that permitted to place most of the climatic events in a firm chronological frame

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Late-glacial and Holocene history of the dry forest area in the south Colombian Cauca Valley

Journal of Quaternary Science ◽

10.1002/jqs.701 ◽

2002 ◽

Vol 17 (7) ◽

pp. 667-682 ◽

Cited By ~ 42

Author(s):

Juan Carlos Berrío ◽

Henry Hooghiemstra ◽

Robert Marchant ◽

Orlando Rangel

Keyword(s):

Late Glacial ◽

Forest Area ◽

Dry Forest ◽

The South ◽

History Of ◽

Late Glacial And Holocene

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Late-glacial and Holocene European pollen data

Journal of Maps ◽

10.1080/17445647.2016.1197613 ◽

2016 ◽

Vol 13 (2) ◽

pp. 921-928 ◽

Cited By ~ 30

Author(s):

Simon Brewer ◽

Thomas Giesecke ◽

Basil A. S. Davis ◽

Walter Finsinger ◽

Steffen Wolters ◽

...

Keyword(s):

Late Glacial ◽

Pollen Data ◽

Late Glacial And Holocene

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Late Glacial and Holocene Vegetation Changes in the Wigry National Park, Ne Poland – New Pollen Data from Three Small Dystrophic Lakes

Studia Quaternaria ◽

10.2478/squa-2014-0001 ◽

2014 ◽

Vol 31 (1) ◽

pp. 5-16 ◽

Cited By ~ 1

Author(s):

Magdalena Fiłoc ◽

Mirosława Kupryjanowicz ◽

Danuta Drzymulska

Keyword(s):

National Park ◽

Radiocarbon Dating ◽

Late Glacial ◽

Vegetation Changes ◽

Pollen Data ◽

Ams Radiocarbon Dating ◽

Ne Poland ◽

Dystrophic Lakes ◽

Late Glacial And Holocene ◽

Current Stage

Abstract The main phases of the Late Glacial and Holocene development of vegetation in the Wigry National Park were reconstructed based on the pollen analysis of sediments from three small dystrophic lakes (Lake Suchar Wielki, Lake Suchar II and Lake Ślepe). At the current stage of research, the age of the studied deposits was determined by AMS radiocarbon dating of few samples only. This meant that the chronology of the investigated sections had to be estimated also indirectly using their palynological correlation with the radiometrically well-dated section from Lake Wigry. The obtained pollen data confirmed the picture of the postglacial vegetation changes of the Wigry National Park, which was based on earlier studies of Lake Wigry. Furthermore, it documented the existence, mainly in the Preboreal and Atlantic chronozones, of temporary changes in vegetation, which might be a reaction to a short-lived cold fluctuations of climate.

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Shotgun DNA, pollen and biological multi-proxy analysis of Lateglacial lake sediments from Monticchio, Italy

10.5194/egusphere-egu2020-19272 ◽

2020 ◽

Author(s):

Laura Parducci ◽

Kevin Nota ◽

Willy Tinner ◽

Jacqueline van Leeuwen ◽

Pim van der Knaap ◽

...

Keyword(s):

Lake Sediments ◽

Southern Italy ◽

Late Glacial ◽

Plant Identification ◽

Complementary Information ◽

Biological Communities ◽

Varved Lake Sediments ◽

Late Glacial And Holocene ◽

Taxonomic Groups ◽

Metagenomic Approach

<p>We used shotgun DNA sequencing of the full metagenome preserved in varved lake sediments from southern Italy (Lago Grande di Monticchio) to investigate the whole diversity of taxonomic groups present. We combine sedimentary aDNA and pollen data as well as other biological multi-proxy data and tested if it was possible to correlate the relative abundances of plants and other biological communities to distinct climatic shifts that occurred between the Late Glacial and Holocene. In addition, we used the metabarcoding technique to compare the two sequencing approaches specifically for plants.</p><p>Our studies showed that the inhibition of DNA replication was almost absent in older (full glacial) sediment samples while it increased substantially in more recent samples. DNA provides a strong signal of plant community changes and a large number of new plant taxa were recorded. A comparison between sequencing approaches and proxies highlights differences and similarities and supports earlier findings that plants growing close to or within a lake are often recorded by DNA and that DNA provides important complementary information to that collected from palaeoecological analyses. Nevertheless, increasing DNA reference libraries and enrichment strategies prior to sequencing are necessary to improve the potential and accuracy of plant identification using the metagenomic approach.</p>

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Krzywopłoty – Late Glacial and Holocene Mire in the Bydlin Area (Częstochowa Upland)

Bulletin of Geography Physical Geography Series ◽

10.2478/bgeo-2011-0005 ◽

2011 ◽

Vol 4 (1) ◽

pp. 89-102 ◽

Cited By ~ 3

Author(s):

Sławomir Żurek ◽

Małgorzata Nita ◽

Katarzyna Imioł

Keyword(s):

Water Level ◽

Laboratory Tests ◽

Younger Dryas ◽

Late Glacial ◽

Pine Forests ◽

Pollen Data ◽

Continuous Transformation ◽

Pollen Assemblage ◽

Late Glacial And Holocene ◽

Organic Deposits

Abstract Macroscopic and laboratory tests of over 4-metre-thick organic deposits of Krzywopłoty profile (gyttjas and peat) allowed the authors to identify the development of the peatland as having four phases, each transition being associated with fluctuations in water level. Sediments from a depth of 3.75-0.65 m were also included in palynological testing. Seven local pollen assemblage zones show a continuous transformation in the plant landscape and surroundings of the site between the end of the Vistulian and the Holocene. Pollen data indicates a change of vegetation, from open communities of herbaceous plants and loose pine-birch communities in the Younger Dryas, then dense pine forests in the Preboreal chronozone, and finally multispecies forests in the Atlantic and Subboreal chronozones.

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