Profile distributions of soil organic carbon fractions in a permafrost region of the Qinghai–Tibet Plateau

Yuan, Zi‐Qiang; Jin, Huijun; Wang, Qingfeng; Wu, Qingbai; Li, Guo‐Yu; Jin, Xiaoying; Ma, Qiang

doi:10.1002/ppp.2055

Cited by 14 publications

(4 citation statements)

References 65 publications

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“…However, under the background of climate change, the grassland ecosystem in Qinghai-Tibet Plateau is facing signi cant global warming, which may lead to transformed from Alpine meadows to arid and semi-arid grassland (Zhang et al 2017). Therefore, the content of carbon decrease from a stable carbon pool in the alpine meadow at present, but the extent of this change remains a challenge to predict (Yuan et al 2020). Similar to the change of carbon, the nitrogen content decreases during the succession to, except SMN, NO3-N, and URE.…”

Section: Discussionmentioning

confidence: 99%

Changes in soil fungal community composition and functional groups during the succession of Alpine grassland

Zhao

Yin²,

Li³

et al. 2022

Plant Soil

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Aims This study explored the trends in soil fungal patterns and their responses to carbon and nitrogen during the succession in Alpine grassland in the Qilian Mountain area. Methods Illumina sequencing of ITS genes was used to characterize the soil fungal construct, and the FUNGuild database to predict functional groups in Alpine grassland succession from swamp meadow to alpine meadow, steppe meadow. Soil carbon and nitrogen, vegetation carbon and nitrogen, and soil enzyme activity were also investigated. ResultsThe soil fungal OTUs increased with succession in the rst stages but then reached a relatively stable state in the second successional stages. The sobs and Chao1 index showed the same trend as OTUS during succession. And there are signi cant differences in fungal community structure among different succession stages. During succession, most phyla showed linear decreases trends; whereas Ascomycota showed linear increases. The relative abundance of Pathotroph and Saprotroph of fungal functional increased with the successional stages, while the Symbiotroph had no change during succession. We also found that NH4 + -N is the dominating factor, which affects the structure of fungal community across all successional stages, and soil microbial carbon has the greatest in uence on the variation of functional communities.Conclusions Our ndings indicate that the community dramatically shifted with succession in the rst stages but then reached a relatively stable state in the second successional stages, while the soil fungal function group did not follow this rule. NH4 + -N and soil microbial carbon had the greatest in uence on the community and function of fungi, respectively.

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Section: Discussionmentioning

confidence: 99%

Changes in soil fungal community composition and functional groups during the succession of Alpine grassland

Zhao

Yin²,

Li³

et al. 2022

Plant Soil

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“…Qinghai‐Tibet plateau alpine meadow located in the world's “third pole”, and is particularly sensitive to global climate change (Liu, Milne, et al., 2018; Yao et al., 2019). Despite the large quantities of stored organic N and P, the amount of plant‐available N and P accounts for only about 1% of the soil total‐N and P because of the restrictions on the decomposition of organic N and P imposed by the low temperatures in this region (Jiang et al., 2021; Yuan et al., 2020; Zhang et al., 2021; Zong & Shi, 2019), which limits plant growth (Wang et al., 2020; Zhang et al., 2020). Long‐term monitoring show that the warming rate of the Qinghai‐Tibet Plateau is twice that of the world (IPCC, 2021).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Enrichment Increased Community Stability by Increasing Asynchrony and Dominant Species Stability in Alpine Meadow of Qinghai‐Tibet Plateau

et al. 2022

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Song et al., 2019). Moreover, most studies on the ecosystem response to P increasing have focused on tropical, ancient, or highly biodiversity areas. The effects of P enrichment on ecosystem stability in cold and high-altitude ecosystems are less known (Soons et al., 2017).Nitrogen is closely related to plant metabolism and growth (Mitra, 2015). N deficiency will weaken plant photosynthesis, while N sufficiency will promote rapid plant growth (Wang et al., 2017;Yue et al., 2020). It is widely recognized that N enrichment reduces the plant species diversity (

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“…The MDX wetland had similar SOC concentrations to a peat bog in organic and mineral horizons in the central HAYR 77 . It had lower SOC concentrations than the peaty soils in the Zoige Basin (15.5–27.2%) 66 and in North America (46.0–49.0%), 78 and than the Matti‐Gelic Cambisol of an alpine meadow in the Qinghai Lake catchment (~0.5–30%) on the QTP 65 .…”

Section: Discussionmentioning

confidence: 94%

The vertical distribution of soil organic carbon and nitrogen in a permafrost‐affected wetland on the Qinghai–Tibet Plateau: Implications for Holocene development and environmental change

Wang

Jin

et al. 2022

Permafrost & Periglacial

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Currently, we know little about accumulation of soil carbon and nitrogen in permafrost-affected wetlands on the Qinghai-Tibet Plateau (QTP). In this study, we analyze the vertical distribution of concentrations, stocks, and apparent accumulation rates of soil organic carbon (SOC) and total nitrogen (TN) in a wetland underlain by ice-rich permafrost in the Headwater Area of the Yellow River (HAYR) on the northeastern QTP in the context of Holocene environmental change. SOC and TN stocks at depths of 0-216 cm were 80.0 kg C m À2 and 6.7 kg N m À2 , respectively.During the past 7.3 kyr, the general regional climate trend in the HAYR was cooling and drying, as indicated by the decline in chemical weathering in the soil profile.Overall, SOC and TN concentrations increased during this period. Meanwhile, an intense period of SOC and TN accumulation occurred at 1,110-720 yr BP, in contrast to much lower apparent accumulation rates of SOC and TN for the other periods during the past 7.3 kyr. This suggests that the accumulation of SOC and TN in permafrost-affected wetlands was also affected by local environmental factors, such as soil material deposition rate, in addition to climatic controls as exerted mainly by temperature and precipitation. This study may help integrate relevant studies on † Deceased.

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Profile distributions of soil organic carbon fractions in a permafrost region of the Qinghai–Tibet Plateau

Cited by 14 publications

References 65 publications

Changes in soil fungal community composition and functional groups during the succession of Alpine grassland

Changes in soil fungal community composition and functional groups during the succession of Alpine grassland

Phosphorus Enrichment Increased Community Stability by Increasing Asynchrony and Dominant Species Stability in Alpine Meadow of Qinghai‐Tibet Plateau

The vertical distribution of soil organic carbon and nitrogen in a permafrost‐affected wetland on the Qinghai–Tibet Plateau: Implications for Holocene development and environmental change

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