Spatial distribution of soil organic carbon in the ecologically fragile Horqin Grassland of northeastern China

Li, Yuqiang; Wang, Xuyang; Niu, Yayi; Lian, Jing; Luo, Yongqing; Chen, Yinping; Gong, Xiangwen; Yang, Huan; Yu, Peidong

doi:10.1016/j.geoderma.2018.03.032

Cited by 37 publications

(24 citation statements)

References 46 publications

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“…The study area covered 12% of the land area in the Loess Plateau, but the accumulation of stored SOC predicted by the IDW (ca 25.65 Tg) and OK (ca 25.86 Tg) methods accounted for only approximately 0.54% of the total SOC storage in the 0-100 cm layers in the Loess Plateau [60], indicating that both interpolation methods were suitable to estimate the storage of SOC and that the study area had considerable potential for carbon sequestration. In our study, approximately 70% of the SOC was stored in the 0-60 cm soil layers, which was consistent with a study conducted in the Horqin Grassland of northern China [28]. Furthermore, topography can indirectly affect SOC content by changing temperature and precipitation patterns [47,59], which may result in the overestimation or underestimation of SOC storage in the southern hills and gullies area with low sampling density.…”

Section: Estimation Of Soc Storagesupporting

confidence: 91%

“…Furthermore, topography can indirectly affect SOC content by changing temperature and precipitation patterns [47,59], which may result in the overestimation or underestimation of SOC storage in the southern hills and gullies area with low sampling density. Considering the high organic carbon content and its sensitivity to climate change and human disturbance in surface soils [28,40,60], we should allocate more sampling sites in the 0-60 cm soil layers while appropriately reducing sampling sites in the other soil layers, thus improving the estimation accuracy of SOC in similar ecosystems with relatively little funding and human resources.…”

Section: Estimation Of Soc Storagementioning

confidence: 99%

“…The region is extremely vulnerable to soil erosion, grazing, over-cultivation, and human-induced land use, leading to serious land degradation and desertification [24,25]. Moreover, this large area is very sensitive to climate change [26] and has a high potential for sequestering carbon [27,28]. Land use change, grazing exclusion, and afforestation have been shown to increase carbon sequestration in desertified areas [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China

Zhang

Zhen

et al. 2020

Sustainability

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Spatial distribution of soil organic carbon (SOC) is important for the development of ecosystem carbon cycle models and assessment of soil quality. In this study, a total of 732 soil samples from 122 soil profiles (0-10, 10-20, 20-40, 40-60, 60-80, and 80-100 cm) were collected by a combination of fixed-point sampling and route surveys in an agro-pastoral ecotone of northern China and the spatial variation of the SOC in the samples was analyzed through classical statistical and geostatistical approaches. The results showed that the SOC contents decreased from 4.31 g/kg in the 0-10 cm to 1.57 g/kg in the 80-100 cm soil layer. The spatial heterogeneity of the SOC exhibited moderate and strong dependence for all the soil layers owing to random and structural factors including soil texture, topography, and human activities. The spatial distributions of the SOC increased gradually from northeast to southwest in the 0-40 cm soil layers, but there was no general trend in deep soil layers and different interpolation methods resulted in the inconsistent spatial distribution of SOC. The storage of SOC was expected to be 25 Tg in the 0-100 cm soil depths for the whole area of 7692 km 2 . The SOC stocks estimated by two interpolation approaches were very close (25.65 vs. 25.86 Tg), but the inverse distance weighting (IDW) interpolation generated a more detailed map of SOC and with higher determination coefficient (R 2 ); therefore, the IDW was recognized as an appropriate method to investigate the spatial variability of SOC in this region.

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Section: Estimation Of Soc Storagesupporting

confidence: 91%

Section: Estimation Of Soc Storagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China

Zhang

Zhen

et al. 2020

Sustainability

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“…on the south slope of the mountain. The temperature decreases and the precipitation increases with increasing altitude in this area ( Jin et al, 2017 ; Li et al, 2018 ). According to the vegetation investigation, the grassland was classified as alpine meadows at elevations of 3,350 m, 3,460 m, and 3 570 m and alpine shrub meadows at elevations of 3,680 m and 3,800 m.…”

Section: Methodsmentioning

confidence: 99%

New insight into the divergent responses of plants to warming in the context of root endophytic bacterial and fungal communities

Wei

Jiang

Han

et al. 2021

PeerJ

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Plant adaptation under climate changes is critical to the maintenance of terrestrial ecosystem structure and function. Studying the response of the endophytic community to climate warming is a novel way to reveal the mechanism of host environmental adaptability because of the prominent role endophytes play in host nutrient acquisition and stress tolerance. However, host performance was generally neglected in previous relevant research, which limits our understanding of the relationships between the endophytic community and host responses to climate warming. The present study selected two plants with different responses to climate warming. Elymus nutans is more suitable for growing in warm environments at low altitude compared to Kobresia pygmaea. K. pygmaea and E. nutans were sampled along an altitude gradient in the natural grassland of Qinghai-Tibet Plateau, China. Root endophytic bacterial and fungal communities were analyzed using high throughput sequencing. The results revealed that hosts growing in more suitable habitats held higher endophytic fungal diversity. Elevation and host identity significantly affected the composition of the root endophytic bacterial and fungal community. 16S rRNA functional prediction demonstrated that hosts that adapted to lower temperatures recruited endophytic communities with higher abundance of genes related to cold resistance. Hosts that were more suitable for warmer and drier environments recruited endophytes with higher abundance of genes associated with nutrient absorption and oxidation resistance. We associated changes in the endophytic community with hosts adaptability to climate warming and suggested a synchronism of endophytic communities and hosts in environmental adaptation.

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“…The first one was that, unlike the sandblasting theory used in the other two schemes, the KOK scheme was built on the foundation of fragmentation theory, which was depicted as dust aggregates fragmented by saltators into smaller particles and vertically emitted to the atmosphere [44]. This might be not applicable in a region with large areas of grassland, shrub land, and cropland enriching organic matter [53], which are different from desert and barren land. The second might be ascribed to the dust emission coefficient C d that scaled the dust emission flux in a way which was similar (but not identical) to the dust source functions.…”

Section: Discussionmentioning

confidence: 99%

Simulating Performance of CHIMERE on a Late Autumnal Dust Storm over Northern China

Zhang

Gao

et al. 2019

Sustainability

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The accurate forecasting of dust emission and transport is a societal demand worldwide as dust pollution is part of many health, economic, and environment issues, which significantly impact sustainable development. The dust forecasting ability of present air quality forecast systems is mainly focused on spring dust events in East Asia, but further improvement may be needed as there is still difficulty in forecasting autumn dust activities, such as failing to predict the serious dust storm that occurred on 25 to 26 November 2018. In this study, a state-of-the-art air quality model, CHIMERE, with three coupled dust schemes was introduced for the first time to simulate the dust emissions during this event to qualitatively and quantitatively validate its dust simulating performance over Northern China. The model results reported that two of the three dust schemes were able to capture the dust emission source located in Gansu Province and reproduce the easterly dust transport path, showing moderately close agreement in the horizontal and vertical distribution patterns with the ground-based and satellite observations. The simulated PM10 concentration had a better relationship with the observed values with a correlation coefficient up to 0.96, while it was lower in the transported areas. Meanwhile, the simulations also presented incorrect dust emission positions such as in areas between the Hulun Buir sandy land and Horqin sandy land. Our results indicate that CHIMERE exhibits reasonably good performance regarding its dust simulation and forecast ability over this area, and its application would help to improve the dust analysis and forecast abilities in Northern China.

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Spatial distribution of soil organic carbon in the ecologically fragile Horqin Grassland of northeastern China

Cited by 37 publications

References 46 publications

Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China

Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China

New insight into the divergent responses of plants to warming in the context of root endophytic bacterial and fungal communities

Simulating Performance of CHIMERE on a Late Autumnal Dust Storm over Northern China

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