Record of Holocene Changes in High-Mountain Landscapes of Southeastern Altai in the Soil–Sedimentary Sequence of the Boguty River Valley

Бронникова, М. А.; Агатова, А. Р.; Лебедева, М. П.; Непоп, Р. К.; Konoplianikova, Yu. V.; Turova, I. P.

doi:10.1134/s1064229318120037

Cited by 8 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An absolute chronology for most of the sections presented in the paper have been discussed earlier in detail (Agatova et al 2016;Bronnikova et al 2017;Bronnikova et al 2018). As based on calibration intervals of 14C dates obtained for buried humus horizons (11 buried soils in 6 studied soilsedimentary sequences, Fig.…”

Section: Resultsmentioning

confidence: 99%

“…BP, but humus coating are obviously superimposed features for Ab horizon. Those were formed as a result of Al-Fe-humus migration from surface soil, later that 2.7 ky (Bronnikova et al 2018).…”

Section: Paleosols In Soil-sedimentary Sequencesmentioning

confidence: 99%

“…Paleoenvironmental changes in the Russian Altai in the end of the Late Pleistocene and Holocene have been studied using different proxy records and indicators, such as pollen, diatoms, and chironomids in lake sediments, landforms and lithostratigraphy of glacial, lacustrine, and fluvial deposits (Butvilovskij 1993;Rudoy and Baker 1993;Westover et al 2006;Blyakharchuk et al 2007;Ilyashuk and Ilyashuk 2007;Carling et al 2011;Nazarov et al 2012;Agatova et al 2012, 2015 andmany others). At the same time research on Holocene paleosol records of the region are few in number (Dergacheva et al 2006;Dergacheva et al 2007;Agatova et al 2016;Bronnikova et al 2017Bronnikova et al , 2018 As far as the Altai is the ultracontinental mountain area with strongly differentiated climatic and landscape conditions, environmental changes here are not only time-, but also strongly space-dependent. Specific of soil body as a recording system is recording the information about surrounding local environment in situ, unlike sedimentary systems keeping generalized environmental information on the area of their sedimentation basins.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Holocene Environmental Change in South-East Altai Evidenced by Soil Record

Бронникова

Konoplianikova

Агатова

et al. 2019

Geogr. environ. sustain.

View full text Add to dashboard Cite

The soils of Russian Altai highlands were used as a paleoenvironmental archive, as a source of dating material, and as a chronostratigraphic marker to describe Holocene environmental change in the studied area. Based on calibration intervals of 14C dates obtained for buried humus horizons (11 buried soils in 6 studied soil-sedimentary sequences) and some dates from pendants of contemporary soils, following stages of pedogenesis were recorded in studied soil-sedimentary systems and surface soils: 6.4 – 11.5 ky cal BP; about 4.9-5.3 cal BP; 2.5-3.8 cal BP; 0.6 – 1.2 cal BP. All studied surface soils in the basins nowadays develop in cold, ultra-continental water deficit conditions: Skeletic Kastanozems Cambic, Skeletic Cambisols Protocalcic, Skeletic Cambic Calcisol Yermic. The most extreme conditions of soil formation within Holocene were within the last 1-2 kyr. All buried soils were formed in better conditions, more balanced in water, with higher biological activity, mostly within steppe or forest-steppe landscapes. Cryogenic features had been insisting all over the Holocene till nowadays. Water demandant cryogenic features are met in buried soils up to the age of 1-2 ky cal BP. In the last millennia cryogenic processes are suppressed, water demandant features gave way to those which can be formed in contemporary water deficit conditions: simple fissures, frost sorting, and shattering. At lower levels (Kuraj basin) more or less arid cold steppe conditions insisted within the most part of Holocene. Initial stages of soil formation were often ground water affected, or at least shortly waterlogged. At the highest positions humid and relatively warm Early Holocene stage of forest pedogenesis is recorded for the beginning of Holocene, and a Late Holocene (last 3-4 kyr) cold humid phase, presumably under mountain tundra and/or alpines. Microsedimentary intra-soil record in carbonatehumus pendants imprints fine fluctuations of soil water regime at initial stages of soil formation, controlled by local topography, and climatic changes in the second half of Holocene. General trends of environmental changes in the region recorded in soil and soil sedimentary systems are in well correspondence with other records of paleonvironment.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Paleosols In Soil-sedimentary Sequencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Holocene Environmental Change in South-East Altai Evidenced by Soil Record

Бронникова

Konoplianikova

Агатова

et al. 2019

Geogr. environ. sustain.

View full text Add to dashboard Cite

show abstract

“…During the fieldwork in the type localities, I. kamelinii was collected on 6 June 2020 from the northern slope opposite the northern bank of Verkhniye Boguty Lake, where it was found in flowering on soddy soils of mountainous steppes [ 84 ] on the hill and in fruiting opposite the hill at the base of the mountain slope ( Figure 3 a,b). Iris ivanovae was collected on 5 June 2021 at the end of flowering from a chestnut soil in a dry steppe heated at noon, where it was found growing, along with Stipa krylovii Roshev., on a sunlit lower part of the northern slope ( Figure 3 c,d).…”

Section: Methodsmentioning

confidence: 99%

New Approach to the Systematics of the Section Psammiris (Iris, Iridaceae): What Does Chloroplast DNA Sequence Tell Us?

Boltenkov

Artyukova

2023

Plants

View full text Add to dashboard Cite

Iris sect. Psammiris comprises rhizomatous perennials distributed in the north temperate zone of Eurasia. The systematics of the section are currently based on morphology, and the phylogenetic relationships within it still remain unclear. In the framework of Iris systematics, we conducted molecular and morphological analyses of the currently recognized I. sect. Psammiris species to elucidate the taxonomic composition and relationships within the section. The phylogenetic reconstructions based on sequence variation of four noncoding chloroplast DNA regions support the monophyly of I. sect. Psammiris, which includes I. tigridia, while I. potaninii var. ionantha belongs to I. sect. Pseudoregelia. The proposed novel classification of I. sect. Psammiris recognizes three series: an autonymic series with I. humilis, I. bloudowii, and I. vorobievii and two unispecific series (I. ser. Potaninia with I. potaninii and I. ser. Tigridiae with I. tigridia). In addition, the taxonomic statuses of I. arenaria, I. ivanovae, I. kamelinii, I. mandshurica, I. pineticola, I. psammocola, and I. schmakovii are clarified herein. We provide a revised taxonomic treatment for I. sect. Psammiris, including notes on the types; updated information on species synonymy, distributions, habitats, and chromosome numbers; and a new identification key to the species. Three lectotypes are designated here.

show abstract

“…conditions of soil formation within the highlands of the SE Altai. Today, the oldest reasonably described paleosols within the SE Altai are dated by applying radiocarbon method to the early Holocene -10-11 ka cal BP (Agatova et al, 2016;Bronnikova et al, 2018). In this context reported by Herget (2005, p. 36), uncalibrated 14 C age 35870±490 BP (Beta 159972) of "a layer of organic sediment, probably a part of paleosol profile" in Section 5 is very important information.…”

Section: Establishing the Chronology And Paleoenvironmentalmentioning

confidence: 99%

Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai

et al. 2020

View full text Add to dashboard Cite

The high mountainous southeastern part of Russian Altai is characterized by complicated sedimentation history. As a result of tectonic movements, Paleogene, Neogene, and even more old Carboniferous and Jurassic organicrich deposits had been partly uplifted and exhumed on the ridge’s slopes, where during the Pleistocene, they were affected by various exogenous processes including glaciation, glacio-fluvial erosion, winnowing activity of ice-dammed lakes, sliding during lake-draining events, followed by further intensive Holocene erosion, pedogenesis, and permafrost formation/degradation.Remobilized ancient organic matter had been involved into geomorphic and pedogenesis processes and affected the results of radiocarbon dating. Numerous radiocarbon ages obtained revealed several typical problems in interpretation of dating results, which was confirmed by multidisciplinary investigations of associated sediments in a wider regional context.This article presents a discussion on obtained apparent radiocarbon dates of organic material from ten sections of the SE Altai. In addition to radiocarbon analysis, in each case multidisciplinary study was carried out in order to properly interpret obtained dates, as well as to explain the inability of directly using apparent 14C ages as a geochronological basis for paleogeographical reconstruction. The analysis presented is of vital importance for establishing the chronology of formation of large ice-dammed lakes and their cataclysmic draining; revealing chronology and paleoenvironmental conditions of pedogenesis in the highlands of the SE Altai; and estimating the range and magnitude of the tectonically driven topography rebuilding in the post-Neogene time.

show abstract

Record of Holocene Changes in High-Mountain Landscapes of Southeastern Altai in the Soil–Sedimentary Sequence of the Boguty River Valley

Cited by 8 publications

References 17 publications

Holocene Environmental Change in South-East Altai Evidenced by Soil Record

Holocene Environmental Change in South-East Altai Evidenced by Soil Record

New Approach to the Systematics of the Section Psammiris (Iris, Iridaceae): What Does Chloroplast DNA Sequence Tell Us?

Radiocarbon dating of organic-rich deposits: Difficulties of paleogeographical interpretations in highlands of Russian Altai

Contact Info

Product

Resources

About