EurekaMag
+ Translate
+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Tabanidae
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

The effect of climatic and edaphic factors on soil organic carbon turnover in hummocks based on δ 13 C on the Qinghai-Tibet Plateau


The effect of climatic and edaphic factors on soil organic carbon turnover in hummocks based on δ 13 C on the Qinghai-Tibet Plateau



Science of the Total Environment 741: 140141



ISSN/ISBN: 1879-1026

PMID: 32615420

DOI: 10.1016/j.scitotenv.2020.140141

Hummocks (thufur, pounus) are peculiar landforms usually formed by repeated freeze-thaw processes and differential frost heave, and are common in frost soil regions, especially in the Qinghai-Tibet Plateau. However, little is known about the response of delta C-13 in soil organic carbon (delta(CSOC)-C-13) to soil and climate properties in hummocks. The beta value indicates the decomposition rate of soil organic carbon (SOC) in soil, and was obtained from the slope of the regression between the log(10)-transformed SOC concentration and delta(CSOC)-C-13 in soil depth profiles. In this study, we investigated delta(CSOC)-C-13 and SOC contents along a soil profile (0-60 cm), together with edaphic and climatic properties, both in hummocks and control plots (alpine grasslands) on the northeastern Qinghai-Tibet Plateau. Then, the variations in delta(13)CSOCand beta values, and the main factors affecting them, were analyzed. The results show that delta(CSOC)-C-13 increases with soil depth, while SOC decreases both in the hummocks and control plots. However, beta values in the hummocks were significantly (P < 0.05) higher than in the control plots while delta(CSOC)-C-13 showed no difference between hummock and control. Redundancy analysis showed that altitude is the main control factor for delta(CSOC)-C-13 and 13 in the hummocks. Climate type was the main factor affecting delta(CSOC)-C-13 in the control plots, while mean annual precipitation and soil fractal dimension were the main factors controlling 13. Overall, climate, rather than soil, is the key factor that affects the carbon turnover rate in the hummock in the northeastern QTP. The findings of this study will expand our understanding of the soil carbon cycle and delta(CSOC)-C-13 changes, especially in the case of hummocks.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 071049341

Download citation: RISBibTeXText

Related references

Effects of freeze-thaw cycles on soil macropores and its implications on formation of hummocks in alpine meadows in the Qinghai Lake watershed, northeastern Qinghai-Tibet Plateau. Journal of Soils and Sediments 21(1): 245-256, 2021

The spatio-temporal patterns of the topsoil organic carbon density and its influencing factors based on different estimation models in the grassland of Qinghai-Tibet Plateau. Plos one 14(12): E0225952, 2019

Changes of soil properties regulate the soil organic carbon loss with grassland degradation on the Qinghai-Tibet Plateau. Ecological Indicators 93: 572-580, 2018

Soil organic carbon stabilization by iron in permafrost regions of the Qinghai-Tibet Plateau. Geophysical Research Letters 43(19): 10286-10294, 2016

Distribution characteristics of soil organic carbon storage and density on the Qinghai-Tibet Plateau. Acta Pedologica Sinica: 5, 933-942, 2008

In situ measurements of organic carbon in soil profiles using vis-NIR spectroscopy on the Qinghai-Tibet plateau. Environmental Science and Technology 49(8): 4980-4987, 2015

Spatial variability of soil microbial biomass and its relationships with edaphic, vegetational and climatic factors in the Three-River Headwaters region on Qinghai-Tibetan Plateau. Applied Soil Ecology 95: 191-203, 2015

Profile distributions of soil organic carbon fractions in a permafrost region of the Qinghai-Tibet Plateau. Permafrost and Periglacial Processes 31(4): 538-547, 2020

Response of soil labile organic carbon fractions and carbon-cycle enzyme activities to vegetation degradation in a wet meadow on the Qinghai-Tibet Plateau. Geoderma 377: 114565, 2020

Response of soil organic carbon to vegetation degradation along a moisture gradient in a wet meadow on the Qinghai-Tibet Plateau. Ecology and Evolution 8(23): 11999-12010, 2018

Changes in soil organic carbon and its active fractions in different desertification stages of alpine-cold grassland in the eastern Qinghai-Tibet Plateau. Environmental Earth Sciences 76(9): 348, 2017

Response of the Organic Carbon Fractions and Stability of Soil to Alpine Marsh Degradation in Zoige, East Qinghai-Tibet Plateau. Journal of Soil Science and Plant Nutrition 20(4): 2145-2155, 2020

Soil organic carbon contents, aggregate stability, and humic acid composition in different alpine grasslands in Qinghai-Tibet Plateau. Journal of Mountain Science 13(11): 2015-2027, 2016

The addition of organic carbon and nitrogen accelerates the restoration of soil system of degraded alpine grassland in Qinghai-Tibet Plateau. Ecological Engineering 158: 106084, 2020

Relations between the underground biomass and soil organic carbon and nitrogen of the alpine meadow at the Eastern Margin of the Qinghai-Tibet Plateau. Wuhan University Journal of Natural Sciences 13(3): 324-330, 2008