Molecular characterization of lipid fractions from extremely water-repellent pine and eucalyptus forest soils

Blas, E. de; Almendros, G.; Sanz, J.

doi:10.1016/j.geoderma.2013.04.027

Cited by 40 publications

(36 citation statements)

References 32 publications

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“…Few studies have attempted to explain the possible relationship between hydrophobic organic compounds and SWR. De Blas et al (2013) found a significant correlation between the amount of free lipids and SWR; however, the amount of bound lipids did not correlate with soil hydrophobicity. 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).…”

Section: Introductionmentioning

confidence: 79%

“…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%

“…The severity of SWR significantly varies depending on vegetation species and soil depths (Doerr et al, 2002Buczko et al, 2005;de Blas et al, 2010de Blas et al, , 2013Neris et al, 2012;Mao et al, 2014;Zavala et al, 2014). For instance, soil under eucalyptus always showed more severe water repellency than under pine during dry periods in northwest Spain Benito, 2011, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Morley et al (2005) found large variations in SWR from extremely repellent to non-repellent sandy soil under grasses, at depths ranging from 0 to 40 cm. As vegetation is the primary input of organic matter to soils (Van Bergen et al, 1997;Kögel-Knabner, 2002), it is now well accepted that SWR is mainly the result of accumulated hydrophobic organic compounds in soils originally derived from vegetation (Bisdom et al, 1993;DeBano, 2000;Doerr et al, 2000;Horne and McIntosh, 2000;Hansel et al, 2008;de Blas et al, 2010de Blas et al, , 2013 and to a smaller extent from microbes (Hallett and Young, 1999;Feeney et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Mao

Nierop

Rietkerk

et al. 2015

SOIL

View full text Add to dashboard Cite

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“…alkyl chain length, alkyl chain saturation, ionized molecules). This may explain the inconsistent results on whether or not the amount of soil organic matter (SOM) has an influence on the occurrence or severity of WR (Aelamanesh et al, 2014;Eynard et al, 2006;Hajnos et al, 2013;Mataix-Solera et al, 2013;Mataix-Solera and Doerr, 2004;Mirbabaei et al, 2013;Varela et al, 2005;Vogelmann et al, 2013;Woche et al, 2005) and the findings of pronounced differences in the effects of a range of organic molecules on WR (de Blas et al, 2013;Doerr et al, 2000;Fischer et al, 2013;Simkovic et al, 2008). WR can be assessed by means of the water drop penetration time (WDPT) test (e.g.…”

Section: Introductionmentioning

confidence: 99%

Biological soil crusts cause subcritical water repellency in a sand dune ecosystem located along a rainfall gradient in the NW Negev desert, Israel

Keck¹,

Felde

Drahorad

et al. 2016

Journal of Hydrology and Hydromechanics

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Abstract:The biological soil crusts (BSCs) in the NW Negev cause local water redistribution by increasing surface runoff. The effects of pore clogging and swelling of organic and inorganic crust components were intensively investigated in earlier studies. However, the effect of water repellency (WR) was not addressed systematically yet. This study investigates subcritical WR of BSCs in three different study sites in the NW Negev. For this purpose, three common methods to determine soil WR were used: (i) the repellency index (RI) method (ii) the water drop penetration time (WDPT) test and (iii) the Wilhelmy plate method (WPM). Furthermore, the potential influence of WR on local water redistribution is discussed and the applied methods are compared. We found the BSC to be subcritically water repellent. The degree of WR may only affect water redistribution on a microscale and has little influence on the ecosystem as a whole. The RI method was clearly the most appropriate to use, whereas the WDPT and the WPM failed to detect subcritical WR.

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Organic Matter Fractions Controlling Soil Water Repellency in Sandy Soils From the Doñana National Park (Southwestern Spain)

et al. 2014

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The relationship between soil organic matter (SOM) content and organic molecular assemblages (n‐alkane/alkenes pairs and n‐fatty acids) with soil water repellency (WR) in different sieve fractions (1–2, 0·25–1, 0·05–0·5 and <0·05 mm) was studied in sandy soils from the Doñana National Park (SW Spain) under four vegetation species: Quercus suber (QS), Pteridium aquilinum (PA), Pinus pinea (PP) and Halimium halimifolium (HH). The severity of soil WR [assessed according to the water drop penetration time (WDPT) test] was ordered according to the sequence QS > PA > PP > HH. A positive correlation was found between soil WR from each sieve fraction and SOM content. Most severe soil WR was detected in QS for all sieve fractions, followed by the finer fractions (<0·05 mm) from PA, PP and HH samples. The finer fraction had the highest SOM content, ranging between 20·9% (PP) and 46·9% (QS). Coarser PA, PP and HH soil fractions (1–2 mm) showed the highest long‐chain‐even C numbered fatty acids in the order PP > PA > HH. A significant correlation was observed between SOM content and the severity of soil WR in QS samples and finer fractions of soil under other vegetation (PA, PP and HH). Coarser fractions (1–2 mm) from PP, PA and HH 1–2 mm sieve fractions showed high severity of WR and relatively low SOM contents that could be explained by a low degree of evolution of the organic residues as seen by analytical pyrolysis, that is, higher alkane/alkene carbon preference index values and the presence of a higher diversity of fatty acid structures. Copyright © 2014 John Wiley & Sons, Ltd.

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Molecular characterization of lipid fractions from extremely water-repellent pine and eucalyptus forest soils

Cited by 40 publications

References 32 publications

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

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

Biological soil crusts cause subcritical water repellency in a sand dune ecosystem located along a rainfall gradient in the NW Negev desert, Israel

Organic Matter Fractions Controlling Soil Water Repellency in Sandy Soils From the Doñana National Park (Southwestern Spain)

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