Importance of land use patterns for erosion-induced carbon fluxes in a Mediterranean catchment

Nadeu, Elisabet; Oost, Kristof Van; Boix‐Fayos, Carolina; Vente, Joris de

doi:10.1016/j.agee.2014.03.040

Cited by 34 publications

(25 citation statements)

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“…The input of sediment from floods that is deposited on the soil surface is not necessarily rich in organic matter and may have trouble contributing to soil enrichment. In fact, recent work shows that in catchments dominated by farmland, transported sediment is generally less rich in organic carbon than wooded areas, for instance [17] (p. 181). Authors in fact note that "soil erosion on annual ecosystem carbon C fluxes was highest for agricultural soils due to lower C input and soil C stocks".…”

Section: Surface Litter and Organic Carbonmentioning

confidence: 99%

“…The site is characterized by relatively flat terrain that progressively rises by a few meters from the riverbank to the end of the terraces, at an altitude of 114.7 to 155.8 m over a distance of 700 m. These floodplains are relatively large in size (˘300 m), and the sediment input that affects them originates from the river during flood events. In this area, riverside woodlands are surrounded by farmland, which is still a potential source of sediment (silt and mainly fine sand) that can provide nutrients to the surface soil [17,22]. The digital terrain model shows that the microtopography of the site is characterized by gentle slopes with a succession of ridges and troughs including a large depression that parallel to the riverbank.…”

Section: Toc Variation and Modeling Of Elevation Levelsmentioning

confidence: 99%

“…Authors in fact note that "soil erosion on annual ecosystem carbon C fluxes was highest for agricultural soils due to lower C input and soil C stocks". For instance, the C stock in the soil surface of agricultural areas is 1214˘20 vs. 3646˘22 g/m 2 for forest areas (period under study: 28 years) [17]. The frequency of successive floods is a key factor to take into account in the determination of the organic carbon content of alluvial soils, although without ignoring other equally important factors such as the proximity of the riverbank, the width of the floodplain, the composition of the vegetation cover, the ground litter, and land uses in a river environment.…”

Section: Surface Litter and Organic Carbonmentioning

confidence: 99%

“…Sediment transported by currents during freshets, for instance, can modify soil carbon content and result in soil depletion or enrichment [16,17]. In addition, the remobilization of sediment transported downstream can also alter the carbon flow in riparian soils in the catchment [17]. It is therefore important to determine spatial variability of the organic content on a micro scale, especially in active zones subject to a multitude of hydrological variations and periodic flooding.…”

Section: Introductionmentioning

confidence: 99%

“…Soil organic carbon content can vary based on edaphic and morphosedimentological conditions, in particular in riverbanks with different hydrological, sedimentological and topographical conditions [12][13][14][15]. Sediment transported by currents during freshets, for instance, can modify soil carbon content and result in soil depletion or enrichment [16,17]. In addition, the remobilization of sediment transported downstream can also alter the carbon flow in riparian soils in the catchment [17].…”

Section: Introductionmentioning

confidence: 99%

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Impacts of Floods on Organic Carbon Concentrations in Alluvial Soils along Hydrological Gradients Using a Digital Elevation Model (DEM)

Saint-Laurent

Paradis

Drouin

et al. 2016

Water

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This study examines the spatial distribution of the organic carbon found in alluvial soils affected by successive floods. In flood zones, very little is known of the processes associated with the development of soils subjected to frequent flooding, in particular with respect to the accumulation of litter and organic carbon concentrations. The aim of this study is to better understand the distribution of organic carbon based on various hydrological gradients associated with flood recurrence. A digital elevation model was developed from LIDAR data to assess the microtopography of the site, and further delineate floodplains and no-flood zones. Various soil properties were considered in addition to organic carbon, such as pH, soil bulk density, litter, drainage, and topographic levels (elevation). The results show that the soils in the frequent-flood zones (FFz, recurrence of 0-20 years) have significantly less total organic carbon than the soils in the no-flood zones (NFz) and the moderate flood zones (MFz,. Average values obtained for the surface horizons (0-20 cm) vary by 1.74%˘0.85% (FFz), 3.34%˘1.09% (MFz) and 3.54%˘1.77% (NFz), respectively. The absence of ground litter in the frequent flood zones helps decrease the input of organic matter in the surface horizons and progressively results in soil depletion.

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Section: Surface Litter and Organic Carbonmentioning

confidence: 99%

Section: Toc Variation and Modeling Of Elevation Levelsmentioning

confidence: 99%

Section: Surface Litter and Organic Carbonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impacts of Floods on Organic Carbon Concentrations in Alluvial Soils along Hydrological Gradients Using a Digital Elevation Model (DEM)

Saint-Laurent

Paradis

Drouin

et al. 2016

Water

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The transport of aggregates associated with soil organic carbon under the rain‐induced overland flow on the Chinese Loess Plateau

Liu

Xiao

et al. 2019

Earth Surf Processes Landf

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Organic carbon (OC) is easily enriched in sediment particles of different sizes due to aggregate breakdown and selective transport for sheet erosion. However, the transport of aggregate‐associated OC has not been thoroughly investigated. To address this issue, 27 simulated rainfall experiments were conducted in a 1 m × 0.35 m box on slope gradients of 15°, 10°, and 15°and under three rainfall intensities of 45 mm h−1, 90 mm h−1 and 120 mm h−1. The results showed that OC was obviously enriched in sediment particles of different sizes under sheet erosion. The soil organic carbon (SOC) concentrations of each aggregate size class in sediments were different from those in the original soil, especially when the rainfall intensity or slope was sufficiently low, such as 45 mm h–1 or 5°, respectively. Under a slope of 5°, the SOC enrichment ratios (ERocs) of small macroaggregates and microaggregates were high but decreased over time. As rainfall intensity increased, OC became enriched in increasingly fine sediment particles. Under a rainfall intensity of 45 mm h–1, the ERocs of the different aggregate size classes were always high throughout the entire erosion process. Under a rainfall intensity of > 45 mm h–1 and slope of > 5°, the ERocs of the different aggregate size classes were close to 1.0, especially those of clay and silt. Therefore, the high ERocs in sediments resulted from the first transport of effective clay. Among total SOC loss, the proportion of OC loss caused by the transport of microaggregates and silt plus clay‐sized particles was greater than 50%. We also found that low stream power and low water depth were two requirements for the high ERocs in aggregates. Stream power was closely related to sediment particle distribution. Flow velocity was significantly and positively related to the percentage of OC‐enriched macroaggregates in the sediments (P > 0.01). Our study will provide important information for understanding the fate of SOC and building physical‐based SOC transport models. © 2019 John Wiley & Sons, Ltd.

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Modelling the Effect of Land Management Changes on Soil Organic Carbon Stocks in a Mediterranean Cultivated Field

et al. 2016

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Land management in agricultural lands has important effects on soil organic carbon (SOC) dynamics. These effects are particularly relevant in the Mediterranean region, where soils are fragile and prone to erosion. Increasing interest of modelling to simulate SOC dynamics and the significance of soil erosion on SOC redistribution has been linked to the development of some recent models. In this study, the SPEROS-C model was implemented in a 1.6 ha cereal field for a 150-year period covering 100 years of minimum tillage by animal traction, 35 years of conventional tillage followed by 15 Although the results showed that the SPEROS-C model is a potential tool to evaluate erosion induced carbon fluxes and assess the relative contribution of different land management on SOC stocks in Mediterranean agroecosystems, the model was not able to fully represent the observed SOC stocks. Further research (e.g. input parameters) and model development will be needed to achieve more accurate results.

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Importance of land use patterns for erosion-induced carbon fluxes in a Mediterranean catchment

Cited by 34 publications

References 50 publications

Impacts of Floods on Organic Carbon Concentrations in Alluvial Soils along Hydrological Gradients Using a Digital Elevation Model (DEM)

Impacts of Floods on Organic Carbon Concentrations in Alluvial Soils along Hydrological Gradients Using a Digital Elevation Model (DEM)

The transport of aggregates associated with soil organic carbon under the rain‐induced overland flow on the Chinese Loess Plateau

Modelling the Effect of Land Management Changes on Soil Organic Carbon Stocks in a Mediterranean Cultivated Field

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