Soil organic carbon storage in a mountain permafrost area of Central Asia (High Altai, Russia)

Pascual, Didac; Kuhry, Peter; Raudina, Tatiana V.

doi:10.1007/s13280-020-01433-6

Cited by 9 publications

(6 citation statements)

References 36 publications

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“…These emissions could potentially add to global warming although not as dramatically as estimated earlier (Anisimov and Zimov 2021). In contrast, warming-driven ''greening'' of vegetation, for example in expanding glacial forefields ) and ascending treelines (Kharuk et al 2021;Rees et al 2020;, are expected to partly offset loss of carbon from thawing permafrost soils (Pascual et al 2021).…”

Section: Permafrostmentioning

confidence: 98%

“…Although observations of carbon storage are relatively many (e.g. Pascual et al 2021), and there are measurements and models of carbon emissions (e.g. Anisimov and Zimov 2021), the land area of Siberia is not adequately covered by essential studies such as those determining greening, browning and stability of vegetation (Callaghan et al 2021a) while observations for remote areas such as the southern mountains are rare (Volkova et al 2021).…”

Section: Global Societal Consequences Of Changementioning

confidence: 99%

“…• Societal issues such as the sustainability of Arctic cities (Orttung et al 2021), changing diet and health of Indigenous People (Andronov et al 2021), varying perceptions of climate change (Rakhmanova et al 2021) and Indigenous knowledge (Lavrillier and Gabyshev 2021); • biodiversity changes throughout Siberia (Kirpotin et al 2021a), in the forests (Kharuk et al 2021) and in the southern mountains Volkova et al 2021); • historical development of peatlands, peatland ecosystem function, and carbon storage (Pascual et al 2021;Tsyganov et al 2021;Kirpotin et al 2021b).…”

Section: Introductionmentioning

confidence: 99%

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Siberian environmental change: Synthesis of recent studies and opportunities for networking

Callaghan

Shaduyko

Kirpotin

et al. 2021

Ambio

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A recent multidisciplinary compilation of studies on changes in the Siberian environment details how climate is changing faster than most places on Earth with exceptional warming in the north and increased aridity in the south. Impacts of these changes are rapid permafrost thaw and melt of glaciers, increased flooding, extreme weather events leading to sudden changes in biodiversity, increased forest fires, more insect pest outbreaks, and increased emissions of CO 2 and methane. These trends interact with sociological changes leading to land-use change, globalisation of diets, impaired health of Arctic Peoples, and challenges for transport. Local mitigation and adaptation measures are likely to be limited by a range of public perceptions of climate change that vary according to personal background. However, Siberia has the possibility through land surface feedbacks to amplify or suppress climate change impacts at potentially global levels. Based on the diverse studies presented in this Ambio Special Issue, we suggest ways forward for more sustainable environmental research and management. Supplementary Information The online version contains supplementary material available at 10.1007/s13280-021-01626-7.

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Section: Permafrostmentioning

confidence: 98%

Section: Global Societal Consequences Of Changementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Siberian environmental change: Synthesis of recent studies and opportunities for networking

Callaghan

Shaduyko

Kirpotin

et al. 2021

Ambio

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“…High mountain soils are known to store a large amount of SOM, mainly caused by low mean annual temperature hampering microbial decomposition [ 3 ]. Across mountainous areas of the world, SOM stocks range widely from 31 to 310 Mg C ha −1 [ 4 , 5 , 6 , 7 , 8 , 9 ]. Importantly, most of these SOM stocks (30–65%) are concentrated in the topsoil (0–10 cm) layer [ 7 , 8 ] with relatively high accumulation of plant residues and slow decomposition rates [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature Sensitivity of Topsoil Organic Matter Decomposition Does Not Depend on Vegetation Types in Mountains

Komarova

Ivashchenko

Sushko

et al. 2022

Plants

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Rising air temperatures caused by global warming affects microbial decomposition rate of soil organic matter (SOM). The temperature sensitivity of SOM decomposition (Q10) may depend on SOM quality determined by vegetation type. In this study, we selected a long transect (3.6 km) across the five ecosystems and short transects (0.1 km) from grazed and ungrazed meadows to forests in the Northwest Caucasus to consider different patterns in Q10 changes at shift of the vegetation belts. It is hypothesized that Q10 will increase along altitudinal gradient in line with recalcitrance of SOM according to kinetics-based theory. The indicators of SOM quality (BR:C, basal soil respiration rate per unit of soil organic carbon; MBC:C, ratio of microbial biomass carbon to soil organic carbon; soil C:N ratio) were used for checking the hypothesis. It was shown that Q10 did not differ across vegetation types within long and short transects, regardless differences in projective cover (14–99%) and vegetation species richness (6–12 units per plot). However, Q10 value differed between the long and short transects by almost two times (on average 2.4 vs. 1.4). Such a difference was explained by environmental characteristics linked with terrain position (slope steepness, microclimate, and land forms). The Q10 changes across studied slopes were driven by BR:C for meadows (R2 = 0.64; negative relationship) and pH value for forests (R2 = 0.80; positive relationship). Thus, proxy of SOM quality explained Q10 variability only across mountain meadows, whereas for forests, soil acidity was the main driver of microbial activity.

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“…Compared with those in the mountainous permafrost regions in the Arctic, the SOC stocks in the QTP permafrost regions were relatively higher. For example, the average SOC stock at 0-to 1-m depth was 6.2 kg m −2 in the High Altai region of Russia [40]. Fuch et al [41] estimated a mean value of 4.6 kg C m −2 in the upper meter of soil in the vegetated areas of Tarfala Valley (northern Sweden).…”

Section: Discussionmentioning

confidence: 99%

Topographic Drivers of Permafrost Organic Carbon Accumulation on the Northern Qinghai–Tibet Plateau

Mu,

Liu

et al. 2024

Permafrost & Periglacial

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Large amounts of soil organic carbon (SOC) have accumulated over thousands of years in the northern permafrost regions. However, the SOC accumulation rates and the effects of topography, vegetation, and soil properties on SOC storage remain poorly constrained, leading to large uncertainties in the estimation of SOC storage and its response to warming. Here, we examined SOC stocks, densities, and accumulation rates using field sampling and radiometric dating in areas with different topographic parameters on the northern Qinghai–Tibet Plateau. Results show that SOC density and stock increases with elevation on south‐facing slopes but decreases with elevation on north‐facing slopes. The carbon accumulation rates in the upper 6 m soil are highest (16.32 g C m−2 year−1) in the north‐facing alpine wet meadow and lowest (1.07 g C m−2 year−1) in the south‐facing alpine steppe. Elevation‐, slope‐, and slope aspect‐induced variations in soil properties and vegetation type are the main factors controlling the spatial SOC distribution. These results imply that the topography strongly affects the spatial heterogeneity of SOC in mountainous permafrost regions. Overall, our findings highlight that topographic factors should be further integrated into carbon models of carbon responses to climate change in permafrost‐affected soils.

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Soil organic carbon storage in a mountain permafrost area of Central Asia (High Altai, Russia)

Cited by 9 publications

References 36 publications

Siberian environmental change: Synthesis of recent studies and opportunities for networking

Siberian environmental change: Synthesis of recent studies and opportunities for networking

Temperature Sensitivity of Topsoil Organic Matter Decomposition Does Not Depend on Vegetation Types in Mountains

Topographic Drivers of Permafrost Organic Carbon Accumulation on the Northern Qinghai–Tibet Plateau

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