Ground-surface conditions of sand-dust event occurrences in the southern Junggar Basin of Xinjiang, China

Yi-bing, Qian; Wu, Zhaoning; Yang, Qing; Zhang, L.-Y.; Wang, X.-Y.

doi:10.1016/j.jaridenv.2006.12.001

Cited by 29 publications

(20 citation statements)

References 17 publications

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“…(Mao and Zhang 1994). In early spring, the cover and density of ephemerals are high, and the plants decrease the frequency of sandstorms and play a key role in ecosystem stability (Qian et al 2007;Wang et al 2009). …”

Section: Introductionmentioning

confidence: 99%

On-site growth response of a desert ephemeral plant, Plantago minuta, to indigenous arbuscular mycorrhizal fungi in a central Asia desert

Zhang

Sun²,

Song

et al. 2011

Symbiosis

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Desert ephemeral plants play a key role in desert ecosystem stability and environmental conservation. To determine the effect of indigenous arbuscular mycorrhizal (AM) fungi on the growth and P uptake of the desert ephemeral Plantago minuta, we conducted two on-site experiments in the Gurbantunggut Desert. The co-development of a pre-isolated indigenous AM fungus, Glomus etunicatum, with the ephemeral was also investigated. The results showed that both the single fungus and the indigenous AM fungal community enhanced the growth and P uptake of P. minuta. The phenological phases of P. minuta were highly consistent with the phases of the indigenous AM fungus, G. etunicatum, indicating that both symbiotic partners seem to be able to sense the changes in local weather, which might be an important trait for the survival of both plant and fungus in desert environments. The development of host plant and indigenous AM fungi were interdependent in the desert.

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Section: Introductionmentioning

confidence: 99%

On-site growth response of a desert ephemeral plant, Plantago minuta, to indigenous arbuscular mycorrhizal fungi in a central Asia desert

Zhang

Sun²,

Song

et al. 2011

Symbiosis

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“…In recent years, great progresses have been made in studying the effects of meteorological elements, such as wind velocity, precipitation, air temperature and so on, and the vegetation coverage and the moisture or texture of land [15][16][17][18][19][20][21][22][23][24]. Joseph [24] collected particulates in suspension and saltation at heights of 5, 10, 20, 50, and 100 cm from different surfaces, in which the largest amounts of sediment were collected in the areas of loose sand and at the sites directly downwind from loose sand, in comparison with the sites containing heavy crusting, gravel, or a forb/grass cover.…”

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confidence: 99%

Characteristics of the lower layer of sandstorms in the Minqin desert-oasis zone

Zhao

Kejie

Yang

et al. 2010

Sci. China Earth Sci.

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By measuring the sand-dust flux, vertical deposition, and the wind velocity throughout 19 sandstorms in the Minqin region, we quantitatively analyzed the horizontal distribution and vertical variation in sandstorm characteristics under different land cover conditions. The effect of different land cover on mitigating sandstorms was also investigated. The results indicated that, in the surface layer ranging from 0-50 m, the intensity of sand-dust horizontal flux and concentration of sand-dust decreased with the increase of the height in the desert and the edge of oasis, whereas the two physical quantities increased slightly with the increase of the height in the oasis. The two physical quantities obey power function well under all three cover conditions. Moreover, in the desert and at the edge of oasis, the sand-dust vertical deposition decreased with the increase of the height. But a partial unimodal distribution at the oasis site and the maximum deposition occurred at the height of 9 m, which corresponds to the middle height of farmland protection forest. The annual flux that passed through a section of 1 m in width and 50 m in height was 9169 kg in the desert, 5318 kg at the edge of oasis, and 2345 kg in the oasis. And the annual fluxes at the edge of oasis and in the oasis are 42% and 74% less, respectively, than that in the desert. This implies that the wind break forest significantly reduced the intensity of sandstorms.Minqin, the lower layer, sand-dust, horizontal flux, vertical deposition Citation:

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“…High grazing intensities lead to low amounts of living and dead aboveground biomass, and, thus, increased sensitivity to wind erosion (Qian et al, 2007;Zhao et al, 2007). The comparatively high sand content on the HG site can be explained by the fact that bare soil, which is not protected by vegetation and litter, shows an increased vulnerability to wind erosion (Shao, 2001).…”

Section: Discussionmentioning

confidence: 99%

Grazing‐induced alterations of soil hydraulic properties and functions in Inner Mongolia, PR China

Krümmelbein

Peth

Zhao

et al. 2009

Z. Pflanzenernähr. Bodenk.

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Increasing grazing intensities of sheep and goats can lead to an increasing degradation of grasslands. We investigated four plots of different grazing intensities (heavily grazed, wintergrazed, ungrazed since 1999, and ungrazed since 1979) in Inner Mongolia, PR China, in order to study the effects of trampling-induced mechanical stresses on soil hydraulic properties. Soil water transport and effective evapotranspiration under "heavily grazed" and "ungrazed since 1979" were modeled using the HYDRUS-1D model. Model calibration was conducted using data collected from field studies. The field data indicate that grazing decreases soil C content and hydrophobicity. Pore volume is reduced, and water-retention characteristics are modified, the saturated hydraulic conductivity decreases, and its anisotropy (vertical vs. horizontal conductivity) is influenced. Modeling results revealed higher evapotranspiration on the ungrazed site (ungrazed since 1979) compared to the grazed site (heavily grazed) due to wetter soil conditions, more dense vegetation, litter cover, and decreased runoff and drainage, respectively. Grazing modified the partitioning of evapotranspiration with lower transpiration and higher evaporation at the grazed site owing to reduced root water uptake due to reduced evaporation and a patchy soil cover.

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Ground-surface conditions of sand-dust event occurrences in the southern Junggar Basin of Xinjiang, China

Cited by 29 publications

References 17 publications

On-site growth response of a desert ephemeral plant, Plantago minuta, to indigenous arbuscular mycorrhizal fungi in a central Asia desert

On-site growth response of a desert ephemeral plant, Plantago minuta, to indigenous arbuscular mycorrhizal fungi in a central Asia desert

Characteristics of the lower layer of sandstorms in the Minqin desert-oasis zone

Grazing‐induced alterations of soil hydraulic properties and functions in Inner Mongolia, PR China

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