Monitoring Sand Drift Potential and Sand Dune Mobility over the Last Three Decades (Khartouran Erg, Sabzevar, NE Iran)

Rahdari, Mohammad Reza; Rodríguez-Seijo, Andrés

doi:10.3390/su13169050

Cited by 9 publications

(2 citation statements)

References 81 publications

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“…Compared to our study, dunes in Khartouran Erg (norteastern Iran) revealed similar wind performances. There, erosive winds are indicative of a low-energy environment (Rahdari and Rodríguez-Seijo, 2021) and predominantly enter from the eastern and northern directions with a directionality index ranging between 0.3 and 0.6. While wind-carried sand has a southwest trajectory, authors suggest that sand dunes have been fixed for a long time historically.…”

Section: Climate and Paleoclimate Intersectsmentioning

confidence: 99%

Spatiotemporal analysis of dune stabilization in the Kyzylkum and Karakum sandy deserts

et al. 2023

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Sand seas and dune bedforms are climatic chronicles that have a wide range of scientific meanings. The Karakum and Kyzylkum sand seas in Central Asia span ∼500,000 km2, among the largest sand seas on Earth; yet, very little is known about their emergence and stabilization. Further, the internationally accessible literature lacks comprehensive studies on the interactions between contemporary climate and dune morphodynamics for this region. In this study, we applied the conventional approach for examining wind data—Fryberger’s drift equations and the latest Copernicus ERA5 wind reanalysis model—to demonstrate that the Karakum and Kyzylkum deserts had (and continue to have) low-energy environments during 1950–2019. Time-series multidimensional raster analysis and data mining indicated that 93% of surveyed desert areas were subjected to low-energy wind conditions during the last 70 years. The decrease in wind energy was further confirmed using the partitioning around medoids (PAM) unsupervised machine-learning clustering method and Getis-Ord Gi* statistics. Such an environmental setting promotes plant growth and biogenic crust development, and strengthens dune stability across the deserts. Furthermore, the results suggested that the spatial patterns of active dune morphologies (e.g., complex barchanoid ridges and overlaying superimpositions) were closely linked to the drift direction, power, and variability of contemporary winds, whereas stabilized aeolian formations (e.g., distinct formations of complex and compound vegetated linear dunes) indicated debatable disassociations. The relationship between the recognized orientation of the surveyed dune types and the computed resultant drift direction did not change significantly, suggesting that over time, the winds in these areas have most likely varied in strength, but not in direction. The calculated drift powers are not sufficient for the formation of registered mega profiles. Rather, they bolster dunes stability, stressing both deserts as indicative of earlier climatic eras that permitted aeolian sand activity and severe shifts that have initiated their steadiness. This is the first comprehensive study to statistically evaluate the links between the contemporary climate and dune morphologies of the Karakum and Kyzylkum deserts. Our study can serve as a foundation for future studies on climate change, dune mapping, and optically stimulated luminescence (OSL) dating, while offering a broad understanding of the region’s paleo and contemporary environmental systems dynamics.

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Section: Climate and Paleoclimate Intersectsmentioning

confidence: 99%

Spatiotemporal analysis of dune stabilization in the Kyzylkum and Karakum sandy deserts

et al. 2023

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“…Similarly, drought and salinity are major abiotic stress factors that significantly impact the production of crops, including peanuts [18,19]. These stress factors can reduce plant growth and productivity by affecting various physiological and biochemical processes in plants [20,21]. In recent years, the identification and characterization of genes that play a crucial role in abiotic stress tolerance have become popular research topics in plant biology.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Identification and Comprehensive Analysis of the GASA Gene Family in Peanuts (Arachis hypogaea L.) under Abiotic Stress

Syed Nabi,

Lee,

Cho

et al. 2023

IJMS

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Peanut (Arachis hypogaea L.) is a globally cultivated crop of significant economic and nutritional importance. The role of gibberellic-acid-stimulated Arabidopsis (GASA) family genes is well established in plant growth, development, and biotic and abiotic stress responses. However, there is a gap in understanding the function of GASA proteins in cultivated peanuts, particularly in response to abiotic stresses such as drought and salinity. Thus, we conducted comprehensive in silico analyses to identify and verify the existence of 40 GASA genes (termed AhGASA) in cultivated peanuts. Subsequently, we conducted biological experiments and performed expression analyses of selected AhGASA genes to elucidate their potential regulatory roles in response to drought and salinity. Phylogenetic analysis revealed that AhGASA genes could be categorized into four distinct subfamilies. Under normal growth conditions, selected AhGASA genes exhibited varying expressions in young peanut seedling leaves, stems, and roots tissues. Notably, our findings indicate that certain AhGASA genes were downregulated under drought stress but upregulated under salt stress. These results suggest that specific AhGASA genes are involved in the regulation of salt or drought stress. Further functional characterization of the upregulated genes under both drought and salt stress will be essential to confirm their regulatory roles in this context. Overall, our findings provide compelling evidence of the involvement of AhGASA genes in the mechanisms of stress tolerance in cultivated peanuts. This study enhances our understanding of the functions of AhGASA genes in response to abiotic stress and lays the groundwork for future investigations into the molecular characterization of AhGASA genes.

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Evaluating temporal sand drift potential trends in the Sistan region, Southeast Iran

Rahdari,

Caballero-Calvo,

Kharazmi

et al. 2023

Environ Sci Pollut Res

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The Sistan region located in Southeastern Iran is one of the most sensitive areas related to sandstorms and wind erosion in the world. It is well-known that one of the most influential factors in sandstorm interpretation is sand drift potential (SDP), which is directly related to wind speed.However, accurate monitoring of this phenomenon are scarce considering different temporal scales. Therefore, the main aim of this research is to analyze the trend of SDP on monthly and annual scales. Our results showed that monthly variations of SDP obtained the highest and lowest values in July (609 VU) and January (47 VU), respectively. Quicksand moved to the southeast, as well as the directional index fluctuated from 0.88 to 0.94. The annually SDP was equal to 2700 VU, which represents a relatively high value compared to other arid regions of the world. The results of trend analysis applying the Mann-Kendall test showed that there is a positive (1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001) and negative (2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016) trend, but the positive trend is not significant. Furthermore, the results of Sen's slope test demonstrated that the negative trend could be obtained with a higher slope during July, September, and Au-gust; as well a positive trend could be obtained with a higher slope during November, December, and June. We concluded that land managers and stakeholders that are in charge to control quicksand using biological and physical methods should pay attention to these trends in arid environment to apply nature-based solutions or control strategies focusing on these temporal sequences.

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Monitoring Sand Drift Potential and Sand Dune Mobility over the Last Three Decades (Khartouran Erg, Sabzevar, NE Iran)

Cited by 9 publications

References 81 publications

Spatiotemporal analysis of dune stabilization in the Kyzylkum and Karakum sandy deserts

Spatiotemporal analysis of dune stabilization in the Kyzylkum and Karakum sandy deserts

Genome-Wide Identification and Comprehensive Analysis of the GASA Gene Family in Peanuts (Arachis hypogaea L.) under Abiotic Stress

Evaluating temporal sand drift potential trends in the Sistan region, Southeast Iran

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