Shrub mound formation and stability on semi-arid slopes in the Northern Negev Desert of Israel: A field and simulation study

Buis, E.; Temme, A.J.A.M.; Veldkamp, A.; Boeken, Bertrand; Jongmans, A.G.; Breemen, N. van; Schoorl, J.M.

doi:10.1016/j.geoderma.2010.03.005

Cited by 28 publications

(14 citation statements)

References 59 publications

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“…Although previous studies in this site have identified shrub patches as the prominent runoff sinks (Buis et al, ; Shachak, Sachs, & Moshe, ), our results show neither shrub cover nor inter‐shrub connectivity as important in controlling runoff yield. However, overall vegetation cover, including both shrubs and herbaceous vegetation, did control runoff throughout the experiment.…”

Section: Discussioncontrasting

confidence: 99%

Shifts in landscape ecohydrological structural–functional relationship driven by experimental manipulations and ecological interactions

2017

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Vegetation structure and patchiness are central controllers of ecohydrological function in semiarid regions. The feedback interactions between vegetation patchiness and water redistribution make semiarid ecosystems sensitive to state‐shifts, where nonlinearities appear in the structure–function correlations. Hydrological connectivity of runoff sources is functionally important for source–sink interactions over a range of spatial scales and plays a key role in ecosystem state‐shifts. Accordingly, the study of the functional responses of ecosystems to changes in connectivity is important for assessing the system's resilience in response to drivers of degradation. We used runoff data collected over 18 years in experimentally manipulated plots to study both the primary functional response to the manipulations and the changes in both structure and function over two decades. By comparing simultaneous changes in woody and herbaceous cover, biocrust cover and connectivity, and runoff yield, we examined the interactions among the different cover classes and assessed the functional consequences of these interactions. The manipulated changes in vegetation and biocrust cover caused large differences in runoff yields, with positive correlation between biocrust cover and runoff. However, changes in vegetation patterns reduced these differences, as the spread of herbaceous plant cover, at the expense of biocrust and woody cover, caused a shift in the cover–runoff relationship. The landscape was resilient to degradation due to rapid shrub growth in locations of high biocrust cover. On the other hand, a positive feedback of herbaceous plant cover replacing shrub cover caused a state‐shift, likely driven by a combination of drought recurrence and cessation of grazing.

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Section: Discussioncontrasting

confidence: 99%

Shifts in landscape ecohydrological structural–functional relationship driven by experimental manipulations and ecological interactions

2017

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“…LAPSUS is a threedimensional landscape evolution model, addressing on-site and offsite effects of numerous landscape forming processes (Schoorl et al, 2000(Schoorl et al, , 2002(Schoorl et al, , 2004Buis et al, 2010;Temme et al, 2011). A landslide component was added to the LAPSUS framework by Claessens et al (2005Claessens et al ( , 2007, called LAPSUS-LandSlide (LAPSUS-LS), to model spatially explicit shallow landslide hazard, the triggering of shallow landslides (by scenario) and their subsequent movement and deposition down-slope.…”

Section: Modelling Frameworkmentioning

confidence: 99%

Calibration and resolution effects on model performance for predicting shallow landslide locations in Taiwan

et al. 2011

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“…While some attribute their formation to water erosion that takes place around the shrub (Rostagno and del Valle, ), or to sediment‐laden runoff (Eldridge and Rosentreter, ), most UCMs are thought to result from dust‐laden wind, which stem from up‐wind erosion of sediments and their accumulation under the shrubs (Olson, ; Hesp, ; Nickling and Wolfe, ; Tengberg, ; Tengberg and Chen, ; Langford, ; Dougill and Thomas, ; Wang et al , ; Seifert et al , ; Li et al , ; Zhang et al , ; Quets et al , ). Their formation was interpreted by some scholars to result from a combination of dust‐laden wind coupled with water erosion (Gibbens et al , ; El‐Bana et al , ), while others attribute their formation to a combination of dust‐laden wind and sediment‐laden runoff from upslope locations (Shachak and Lovett, ; Buis et al , ). Splash by the raindrop impact was also suggested to play a role in their formation (Buis et al , ).…”

Section: Introductionmentioning

confidence: 99%

Factors controlling the formation of coppice dunes (nebkhas) in the Negev Desert

Kidron

Zohar

2015

Earth Surf Processes Landf

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Due to their role in increasing fertility, coppice dunes (nebkhas) are regarded by many researchers as important contributors to aridland ecosystems. Yet, despite their frequent occurrence, little information exists regarding the rate and factors that control their formation. The goal of the current study is to examine the formation rate and factors that determine the establishment of coppice dunes in the Hallamish dune field in the western Negev Desert. The rate in which sand and fines, hereafter aeolian input (AI) was trapped and its particle size distribution (PSD) were examined by means of the solidification of 2 m × 2 m plots using surface stabilizers, and by the installation of three pairs of artificial shrubs (SH), three pairs of artificial trees (TR), and a pair of control ( . It depended upon the wind power, with drift potential having a threshold velocity of U t > 10 m s À1 yielding the higher correlations with the monthly AI (r 2 = 0.59-0.84). No significant relations were obtained between the monthly AI and shrub height. Sand saltation, suspension and creep are seen responsible for mound formation, which based on the current rates of sand accretion are relatively fast with a 60 cm-high coppice dune forming within~150-160 years. The current data highlight the problematic design of some previous research using conventional traps and confining the measurements only to certain seasons.

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Shrub mound formation and stability on semi-arid slopes in the Northern Negev Desert of Israel: A field and simulation study

Cited by 28 publications

References 59 publications

Shifts in landscape ecohydrological structural–functional relationship driven by experimental manipulations and ecological interactions

Shifts in landscape ecohydrological structural–functional relationship driven by experimental manipulations and ecological interactions

Calibration and resolution effects on model performance for predicting shallow landslide locations in Taiwan

Factors controlling the formation of coppice dunes (nebkhas) in the Negev Desert

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