Late Glacial and Holocene vegetational changes on the Ulagan high-mountain plateau, Altai Mountains, southern Siberia

Blyakharchuk, Tatiana; Wright, H. E.; Borodavko, P. S.; Knaap, W.O. van der; Ammann, Brigitta

doi:10.1016/j.palaeo.2004.02.011

Cited by 123 publications

(62 citation statements)

References 11 publications

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“…It is very difficult to reconstruct the glacial and postglacial history of B. humilis using palaeoecological data because the macrofossil record is rather scarce, and the pollen of this species is categorised as B. nana type (Blyakharchuk et al 2004). However, it seems possible that cold-tolerant B. humilis could have existed at higher latitudes during the LGM.…”

Section: Discussionmentioning

confidence: 99%

Chloroplast DNA variation of Betula humilis Schrk. in Poland and Belarus

Jadwiszczak

Banaszek

Jabłońska

et al. 2012

Tree Genetics & Genomes

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Betula humilis is an endangered plant species in Central Europe. In order to protect this species, it is necessary to document its genetic diversity in this region and to identify areas for conservation prioritisation. As molecular investigations conducted throughout the ranges of many plant species have shown that the highest genetic diversities are found within former glacial refugia and/or within the contact zones of different phylogenetic lineages, we investigated the reasons underlying the considerable genetic variation of B. humilis in northeastern Poland revealed previously using nuclear microsatellites. We analysed 365 individuals of B. humilis from 19 populations and 67 specimens of Betula pendula and Betula pubescens sampled in four geographical regions in Poland and Belarus for polymorphism in chloroplast PCR-restriction fragment length polymorphism markers. Genetic data strongly suggested that B. humilis could have survived the Last Glacial Maximum at higher latitudes, but the hypothesis of a refugium in southeastern Poland was rejected. Chloroplast DNA analysis confirmed high genetic diversity in some populations in northeastern Poland. This phenomenon can likely be explained in terms of a suture zone, as the high haplotypic richness was followed by h T ≤v T . Similar patterns of haplotype distributions in the birches under study and high introgression ratio (IG00.71) among B. humilis and congeneric trees suggested that postglacial recolonisation of the shrub birch was complicated by haplotype sharing with other birches.

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Section: Discussionmentioning

confidence: 99%

Chloroplast DNA variation of Betula humilis Schrk. in Poland and Belarus

Jadwiszczak

Banaszek

Jabłońska

et al. 2012

Tree Genetics & Genomes

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“…North of the Mongolian Altai, a cold and dry climate in the Early Holocene was reconstructed for the Russian Altai and Tuva (Blyakharchuk et al, 2004(Blyakharchuk et al, , 2007(Blyakharchuk et al, , 2008Westover et al, 2006;Ilyashuk B., Ilyashuk E., 2007). In the southeastern portion of the Mongolian Altai and in Tuva, alpine meadow area coverage decreased, while wormwood steppe with ephedra in combination with yernik tundra expanded.…”

Section: Discussionmentioning

confidence: 99%

“…Steppe communities were preserved only in intermontane basins and on south-facing slopes (Blyakharchuk et al, 2004). The area covered with dark coniferous taiga reached its maximum size ca 9500-7500 BP.…”

Section: Discussionmentioning

confidence: 99%

“…The climate became colder and more continental. Siberian pine forests covered the Russian Altai; cryophyte meadow and wormwood steppes developed in intermontane basins (Blyakharchuk et al, 2004(Blyakharchuk et al, , 2007(Blyakharchuk et al, , 2008Ilyashuk B., Ilyashuk E., 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Several publications are focused on the Late Pleistocene and Holocene environmental changes in Northern and Central Kazakhstan (Tarasov, Jolly, Kaplan, 1997;Kremenetski, Tarasov, Cherkinsky, 1997), and in the Russian Altai and Tuva (Blyakharchuk et al, 2004(Blyakharchuk et al, , 2007(Blyakharchuk et al, , 2008Schlütz, Lehmkuhl, 2007). These works are supplemented by results of analysis of diatom (Westover et al, 2006) and chironomid remains (Ilyashuk B., Ilyashuk E., 2007) from the Altai and Tuva.…”

Section: Based On Palynological and Diatom Analyses Of The Sediment Cmentioning

confidence: 99%

See 2 more Smart Citations

Environmental Changes in the Mongolian Altai During the Holocene

Rudaya

Tarasov

Dorofeyuk

et al. 2008

Archaeology, Ethnology and Anthropology of Eurasia

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Contrasts in the Quaternary of mid‐North America and mid‐Eurasia: notes on Quaternary landscapes of western Siberia

Wright

2005

J Quaternary Science

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The West Siberian Plain was formed by marine deposits that extended from the Mediterranean basin to the arctic. Tectonic action later produced a striking series of long straight NE-SW grabens in the southern part of the plain. Pleistocene advance of the Kara ice sheet onto the continent resulted in blockage of the Ob and Yenisey rivers to form huge proglacial lakes that drained through these grabens south via the Turgay Pass and the Aral, Caspian, Black and Mediterranean seas to the North Atlantic Ocean, but during the Last Glacial Maximum (late Weichselian, isotope stage 2), the Kara ice sheet did not advance onto the continent in northwestern Siberia. The Altai Mountains, which bound the West Siberian Plain on the south, contained large deep intermontane ice-dammed lakes, which drained catastrophically when the ice dams broke, forming giant ripples on the basin floors. Pollen studies of glacial lakes indicate that the Lateglacial steppe vegetation and dry climatic conditions continued into the early Holocene as summer insolation maintained high levels. Permafrost development on a drained lake floor in the western Altai Mountains resulted in the formation of groups of small pingos. In North America the growth and wastage of the huge Laurentide ice sheet had an indirect role in the climatic history of western Siberia during the Glacial and Lateglacial periods, after which the climate was more affected directly by insolation changes, whereas in North America in the early Holocene the insolation factor was coupled with the climatic effects of the slow wastage of the ice sheet, and the time of maximum dryness was postponed until the mid-Holocene.

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Late Glacial and Holocene vegetational changes on the Ulagan high-mountain plateau, Altai Mountains, southern Siberia

Cited by 123 publications

References 11 publications

Chloroplast DNA variation of Betula humilis Schrk. in Poland and Belarus

Chloroplast DNA variation of Betula humilis Schrk. in Poland and Belarus

Environmental Changes in the Mongolian Altai During the Holocene

Contrasts in the Quaternary of mid‐North America and mid‐Eurasia: notes on Quaternary landscapes of western Siberia

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