Sieving crusts and macrofaunal activity control soil water repellency in semiarid environments: Evidences from SE Spain

Contreras, Sergio; Cantón, Yolanda; Solé‐Benet, Albert

doi:10.1016/j.geoderma.2008.03.019

Cited by 23 publications

(10 citation statements)

References 38 publications

(56 reference statements)

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“…However, this relationship can vary greatly depending on the plant architecture (Quinton et al, 1997), stage of plant development, the adaptation of canopy density to available water resources and the stage of succession, especially after land abandonment (Cammeraat et al, 2005). Moreover, the relationship can reverse, and runoff and erosion sometimes increase with increasing vegetation cover as consequence of hydrophobicity of the organic litter on soil below bushes for the case of runoff (Puigdefábregas et al, 1999;Contreras et al, 2008) or due to sediment exhaustion in patches with little vegetation cover (Nicolau et al,1996). Variation in the plant root system can impact at least as much as vegetation cover on rill and ephemeral gully erosion (De Baets et al, 2007).…”

Section: Patch Scalementioning

confidence: 99%

A review of runoff generation and soil erosion across scales in semiarid south-eastern Spain

Cantón

Solé‐Benet

Vente

et al. 2011

Journal of Arid Environments

239

118

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a b s t r a c tClimate, lithology, soil and especially, intense land use/cover changes, make SE Spain very vulnerable to runoff generation and water erosion leading to loss of nutrients and organic matter and to infrequent but devastating floods, reservoir siltation and mass failures. This susceptibility has led to heavy economic investment and research efforts since the 1980s, making this region a worldwide reference for understanding the hydrology and geomorphology of semiarid ecosystems. Runoff and soil erosion have been intensively studied throughout the last decades in various natural ecosystems as well as in abandoned farmlands. Research has considered a wide range of methods and spatial and temporal scales. This paper reviews the methods and data describing runoff generation and water erosion, synthesising the key processes involved, rates, thresholds and controlling factors from a scaledependent perspective. It also identifies the major gaps in current knowledge to provide recommendations for further research towards solutions that reduce the negative impacts of erosion. Research in SE Spain has contributed significantly to a better understanding of the effect of spatial and temporal scale on runoff and sediment yield measurements, and highlighted the important role of distinct erosion and sediment transport processes, hydrologic connectivity, spatial and temporal patterns of rainfall, the occurrence of extreme events and the impacts of land use changes. The most effective ways and challenges to predict runoff, soil erosion and sediment yield at the catchment scale are also discussed.

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Section: Patch Scalementioning

confidence: 99%

A review of runoff generation and soil erosion across scales in semiarid south-eastern Spain

Cantón

Solé‐Benet

Vente

et al. 2011

Journal of Arid Environments

239

118

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“…Ester-bound biopolymers (in particular suberins) have been shown to lead to relatively stronger SWR compared to free lipids in sandy soils (Mao et al, 2014). Hence, it is clear that not only the amount but also the type of SWR markers affect the severity of SWR (Contreras et al, 2008;de Blas et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Predicting soil water repellency using hydrophobic organic compounds and their vegetation origin

Mao

Nierop

Rietkerk

et al. 2015

SOIL

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Abstract. It is widely accepted that soil water repellency (SWR) is mainly caused by plant-derived hydrophobic organic compounds in soils; such hydrophobic compounds are defined as SWR markers. However, the detailed influence of SWR markers on SWR is yet unclear and the knowledge of their original sources is still limited. The aims of this study are to select important SWR markers to predict SWR based on their correlation with SWR and to determine their origin. In our study, sandy soils with different SWR were collected, along with their covering vegetation, i.e. plant leaves/needles and roots. A sequential extraction procedure was applied to the soils to obtain three organic fractions: dichloromethane (DCM)/MeOH soluble fraction (D), DCM/MeOH insoluble fraction of isopropanol/ammonia solution (IPA/NH 3 ) extract (AI) and DCM/MeOH soluble fraction of IPA/NH 3 extract (AS), which were subdivided into 10 dominant SWR marker groups: D fatty acid, D alcohol, D alkane, AI fatty acid, AI alcohol, AI ω-hydroxy fatty acid, AI α,ω-dicarboxylic acid, AS fatty acid, AS alcohol and AS ω-hydroxy fatty acid. Waxes and biopolyesters of the vegetation were also sequentially extracted from plants. The soils with higher SWR have significantly higher relative concentrations of AS alcohols. A number of indications suggest that AS alcohols are mainly derived from roots and most likely produced by microbial hydrolysis of biopolyesters (mainly suberins). In addition, the strong correlation between the biomarkers of plant tissues and SWR markers in soils suggests that it is more accurate to predict SWR of topsoils using ester-bound alcohols from roots, and to predict SWR of subsoils using root-derived ω-hydroxy fatty acids and α,ω-dicarboxylic acids. Considering the sandy soils studied here, the relationships we obtained need to be tested for other types of soils. Our analysis indicates that plant roots have a primary role influencing SWR relative to plant leaves.

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“…In contrast to natural soil surfaces that may have low-permeability hydrophobic crusts (e.g. Contreras et al, 2008), synthetic surfaces have porous surfaces that are often raked to erase hoof prints and to loosen synthetic materials.…”

Section: Water Repellency and Permeabilitymentioning

confidence: 99%

Permeability and compressibility of wax-coated sands

Bardet¹,

Jesmani²,

Jabbari³

et al. 2014

Géotechnique

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Sieving crusts and macrofaunal activity control soil water repellency in semiarid environments: Evidences from SE Spain

Cited by 23 publications

References 38 publications

A review of runoff generation and soil erosion across scales in semiarid south-eastern Spain

A review of runoff generation and soil erosion across scales in semiarid south-eastern Spain

Predicting soil water repellency using hydrophobic organic compounds and their vegetation origin

Permeability and compressibility of wax-coated sands

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