Analysis of the landscape structure in the tundra zone for western Siberia based on satellite data

Golubyatnikov, L. L.; Zarov, Evgeny A.; Казанцев, В. С.; Filippov, Ilya; Gavrilov, Gavrilo

doi:10.1134/s0001433815090091

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…Miles and Esau [ 10 ] found that the effect of greening is characteristic of 8.4% of the WSL. It turns out that the greatest contribution to this effect is provided by khasyreys of the early and mid- successional stages, whose area is 5% [ 75 ].…”

Section: Discussionmentioning

confidence: 99%

“…Lakes and khasyreys are distributed within the flat residual surfaces of the terrace. The khasyreys cover from 8.5% to 19.6% of the study area, whereas the lake coverage ranges from 4.8% to 7.6% [ 75 ]. Many of these khasyreys have been drained relatively recently, fewer than 100 years ago and constitute about 5% of the overall area [ 38 ].…”

Section: Methodsmentioning

confidence: 99%

“…Thermokarst lakes are shallow, with a depth of 1 to 2 m. The bottom of the lake is flat, but there is usually a slope either towards the center of the basin or towards one of the edges. Since a large part of the studied area is waterlogged (up to 34%, according to Golubyatnikov et al [ 75 ]), large lakes wash away the peat deposits of the adjacent bogs, which leads to an enrichment of the lake sediment with redeposited peat [ 86 ]. As a result, the share of peat in sediment increases towards the center of the lake.…”

Section: Methodsmentioning

confidence: 99%

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Lake Drainage in Permafrost Regions Produces Variable Plant Communities of High Biomass and Productivity

Loiko

Klimova

Kuzmina

et al. 2020

Plants

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Climate warming, increased precipitation, and permafrost thaw in the Arctic are accompanied by an increase in the frequency of full or partial drainage of thermokarst lakes. After lake drainage, highly productive plant communities on nutrient-rich sediments may develop, thus increasing the influencing greening trends of Arctic tundra. However, the magnitude and extent of this process remain poorly understood. Here we characterized plant succession and productivity along a chronosequence of eight drained thermokarst lakes (khasyreys), located in the low-Arctic tundra of the Western Siberian Lowland (WSL), the largest permafrost peatland in the world. Based on a combination of satellite imagery, archive mapping, and radiocarbon dating, we distinguished early (<50 years), mid (50–200 years), and late (200–2000 years) ecosystem stages depending on the age of drainage. In 48 sites within the different aged khasyreys, we measured plant phytomass and productivity, satellite-derived NDVImax, species composition, soil chemistry including nutrients, and plant elementary composition. The annual aboveground net primary productivity of the early and mid khasyrey ranged from 1134 and 660 g·m−2·y−1, which is two to nine times higher than that of the surrounding tundra. Late stages exhibited three to five times lower plant productivity and these ecosystems were distinctly different from early and mid-stages in terms of peat thickness and pools of soil nitrogen and potassium. We conclude that the main driving factor of the vegetation succession in the khasyreys is the accumulation of peat and the permafrost aggradation. The soil nutrient depletion occurs simultaneously with a decrease in the thickness of the active layer and an increase in the thickness of the peat. The early and mid khasyreys may provide a substantial contribution to the observed greening of the WSL low-Arctic tundra.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Lake Drainage in Permafrost Regions Produces Variable Plant Communities of High Biomass and Productivity

Loiko

Klimova

Kuzmina

et al. 2020

Plants

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“…Thereby, thermokarst shallow streams and depressions with small and large ponds arose from the thawing of ice wedges and were widely developed. Aeolian and abrasion processes intensively affect steep slopes and river and lake banks [51].…”

Section: Study Sitementioning

confidence: 99%

Vulnerability of the Ancient Peat Plateaus in Western Siberia

Пастухов

Мarchenko-Vagapova

Loiko

et al. 2021

Plants

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Based on the data of the plant macrofossil and palynological composition of the peat deposits, the evolution and current state of polygonal peatlands were analyzed at the southern limit of continuous permafrost in the Pur-Taz interfluve. Paleoreconstruction shows that peat accumulation began in the Early Holocene, about 9814 cal. year BP, in the Late Pre-Boreal (PB-2), at a rate of 1 to 1.5 mm year−1. Intensive peat accumulation continued in the Boreal and early Atlantic. The geocryological complex of polygonal peatlands has remained a stable bog system despite the predicted warming and increasing humidity. However, a rather rapid upper permafrost degradation and irreversible changes in the bog systems of polygonal peatlands occur with anthropogenic disturbances, in particular, a change in the natural hydrological regime under construction of linear objects.

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“…Для исследуемого региона характерна равнинная местность -участки суходольной беломошнолишайниковой тундры мозаично располагаются среди заболоченных понижений. Повсюду наблюдаются результаты термокарстовых и мерзлотных процессов: на исследуемой территории распространены мерзлые бугры, полигональные болота, озёра термокарстового происхождения, хасыреи (котловины спущенных термокарстовых озёр) [6,7]. Для данного исследования нами были выбраны наиболее распространенные в тундровой зоне болотные экосистемы с максимальными глубинами летнего протаивания торфяной залежи.…”

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Carbon Content in Peat Soils for North-Eastern Part of Western Siberia

Golubyatnikov¹,

Zarov²

2019

EEISAMES

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Аннотация. На основе экспериментальных данных проведен анализ содержания углерода в почвах болотных экосистем тундровой зоны северо-восточной части Западной Сибири. Рассматривается активный слой торфяных почв (ежегодно оттаиваемый почвенный слой) и верхний мерзлый слой. В активном слое выделены два горизонта-верхний (очёс) и нижний (талый торф). Полученные результаты указывают на достаточно близкое содержание углерода в активном и верхнем мерзлом слоях почв болотных экосистем рассматриваемой территории. Содержание углерода в слое талого торфа мочажин незначительно превышает содержание углерода в очесе. В торфяных залежах полигонов содержание углерода в очесе превышает содержание углерода в ежегодно оттаиваемом слое этих залежей. Ключевые слова: углерод, торфяная залежь, тундровая зона, Западная Сибирь.

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Analysis of the landscape structure in the tundra zone for western Siberia based on satellite data

Cited by 5 publications

References 8 publications

Lake Drainage in Permafrost Regions Produces Variable Plant Communities of High Biomass and Productivity

Lake Drainage in Permafrost Regions Produces Variable Plant Communities of High Biomass and Productivity

Vulnerability of the Ancient Peat Plateaus in Western Siberia

Carbon Content in Peat Soils for North-Eastern Part of Western Siberia

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