Carbon storage and soil organic matter stabilisation in near-natural, restored and embanked Swiss floodplains

Bullinger-Weber, Géraldine; Bayon, Renée‐Claire Le; Thébault, Aurélie; Schlaepfer, Rodolphe; Guénat, Claire

doi:10.1016/j.geoderma.2013.12.029

Cited by 26 publications

(17 citation statements)

References 40 publications

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“…This result revealed that the SOCD showed a significantly positive correlation with the silt and clay contents and a significantly negative correlation with the sand content, which is similar to the results reported for riparian areas in other regions (Bechtold and Naiman 2006;Bullinger-Weber et al 2014). The main reason for this is that fine fractions (clay and silt) can retain more soil organic matter than coarser fractions (Dai et al 2011;Ruiz-Sinoga et al 2012).…”

Section: Influence Of Soil Texture On the Socdsupporting

confidence: 86%

“…This result is related to the influence of flooding, sedimentation, riparian vegetation and human activities (Ricker et al 2013). In the frequently flooded zone, frequent floods and the concomitant deposition of carbon-rich sediments (deposition amount [ erosion amount) usually lead to an increase in soil organic carbon stocks (Cierjacks et al 2010b;Bullinger-Weber et al 2014). The study of Cabezas and Comín (2010) on organic carbon accretion rates after individual flooding events in a reach on the Middle Ebro River in Spain revealed that dry flood deposits in the riparian area ranged from 2330.70 to 5987.41 g/m 2 , and the total organic carbon accretion rate ranged from 58.97 to 70.59 g/m 2 .…”

Section: Changes In Socd In the Riparian Areamentioning

confidence: 99%

“…Based on a soil investigation of inundated and non-inundated zones in southern Québec, Canada, SaintLaurent et al (2014a) found that the SOC content in the non-inundated zone (4.0 %) was significantly higher than that in the inundated zones (2.0 %). Flooding is a main factor that affects the spatial distribution of riparian SOC, mainly through the processes of erosion and sedimentation (Bullinger-Weber et al 2014;Rieger et al 2014;SaintLaurent et al 2014b). The plant litter (leaves and twigs) on the ground is considered to be an important source for increasing the SOC; periodic floods can deposit, bury and wash away riparian litter and therefore affect the accumulation of local and regional SOC (Xiong and Nilsson 1997;Blazejewski et al 2009;Drouin et al 2011).…”

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confidence: 99%

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Comparison of topsoil organic carbon and total nitrogen in different flood-risk riparian zones in a Chinese Karst area

2016

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Riparian zones play a significant role in the soil organic carbon (SOC) sequestration to mitigate the increasing atmospheric CO 2 . SOC storages vary spatially within and among riparian soils by the influence of multiple unique biotic and biophysical landscape characteristics. Understanding the distribution characteristics of SOC from the water's edge to the upland is essential to effectively assess SOC storage and the function of carbon sink of riparian zones. In this study, the goals were to quantify the SOC density (SOCD) and total nitrogen content (TN) (0-20 cm of topsoil) in different flood-risk riparian zones of the Lijiang River [frequently flooded zones (FFz) (flood frequency C3 times/year), seldom flooded zones (SFz) (flood \3 times/year) and adjacent uplands (AU)], which are located in a typical karst geomorphology region, and to assess the contribution of soil texture, plant litter and soil pH to SOCD variation. The results of a soil survey of typical riparian areas (N = 15) showed that the average SOCD and TN content were 31.52 ± 13.25 Mg/ha and 0.094 ± 0.043 %, respectively, in the entire riparian zone (0-20 cm of topsoil). Compared with the SOCD in AU (19.98 ± 3.06 Mg/ha), the SOCD of FFz and SFz was significantly higher by 70.92 and 49.70 % (p \ 0.05), respectively. Stepwise regression analyses indicated that soil texture was the most important factor that influenced the SOCD variation (0-20 cm of topsoil) in FFz, which could account for 67 % of the SOCD variation, while plant litter was the most important factor in SFz, which could account for 80 % of the SOCD variation. Lastly, our findings indicate that riparian zones have more SOC storages than adjacent uplands in the Lijiang River. Therefore, the exploitation of riparian zones for agricultural purposes may weaken the function of riparian on the SOC sequestration.

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Section: Influence Of Soil Texture On the Socdsupporting

confidence: 86%

Section: Changes In Socd In the Riparian Areamentioning

confidence: 99%

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confidence: 99%

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Comparison of topsoil organic carbon and total nitrogen in different flood-risk riparian zones in a Chinese Karst area

2016

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“…The pioneer habitat in which the freeze-cores were extracted is characterized by an herbaceous vegetation (Phalaris arundinacea). A high sand content (86 ± 16% of the mineral phase) and a low proportion of organic carbon (1.5 ± 0.5% of the total soil) have been measured (Bullinger-Weber et al, 2014). The freeze-core sampling technique used in this study is similar to the one described in detailed in Humpesch and Niederreiter (1993).…”

Section: Overview Of the Experimental Designmentioning

confidence: 99%

“…The freeze-cores were extracted in the largest restored floodplain of Switzerland, the "Schäffäuli" protected area (47°35′27.93″N, 8°46′21.33″E) located along the Thur River in North-East Switzerland and largely described in several previous studies (Bullinger-Weber et al, 2014;Fournier et al, 2012;Schirmer et al, 2014;Schneider et al, 2011). The pioneer habitat in which the freeze-cores were extracted is characterized by an herbaceous vegetation (Phalaris arundinacea).…”

Section: Overview Of the Experimental Designmentioning

confidence: 99%

Coupling X-ray computed tomography and freeze-coring for the analysis of fine-grained low-cohesive soils

et al. 2017

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A B S T R A C TThis paper presents the coupling of freeze-core sampling with X-ray CT scanning for the analysis of the soil structure of fine-grained, low-cohesive soils. We used a medical scanner to image the 3D soil structure of the frozen soil cores, providing X-ray CT data at a millimetric resolution over freeze-cores that are up to 62.5 cm long and 25 cm wide. The obtained data and the changes in gray level values could be successfully used to identify and characterize different soil units with distinctly different physical properties. Traditional measurements of soil bulk density, carbon and particle size analyses were conducted within each of the identified soil units. These observations were used to develop a 3D model of soil bulk density and organic matter distribution for five freeze-cores obtained at a restored floodplain in Switzerland. The millimetric X-ray CT scanning was applied to detect the impact of freeze-coring on the soil structural integrity. This allows identifying undisturbed zones, a critical precondition for any subsequent assessment of soil structure. The proposed coupling is thought to be applicable to a wide range of other low-cohesive soil types and has a large potential for applications in hydrogeology, biology or soil science.

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Carbon dynamics of river corridors and the effects of human alterations

Wohl

Hall

Lininger

et al. 2017

Ecological Monographs

106

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Research in stream metabolism, gas exchange, and sediment dynamics indicates that rivers are an active component of the global carbon cycle and that river form and process can influence partitioning of terrestrially derived carbon among the atmosphere, geosphere, and ocean. Here we develop a conceptual model of carbon dynamics (inputs, outputs, and storage of organic carbon) within a river corridor, which includes the active channel and the riparian zone. The exchange of carbon from the channel to the riparian zone represents potential for storage of transported carbon not included in the “active pipe” model of organic carbon (OC) dynamics in freshwater systems. The active pipe model recognizes that river processes influence carbon dynamics, but focuses on CO2 emissions from the channel and eventual delivery to the ocean. We also review how human activities directly and indirectly alter carbon dynamics within river corridors. We propose that dams create the most significant alteration of carbon dynamics within a channel, but that alteration of riparian zones, including the reduction of lateral connectivity between the channel and riparian zone, constitutes the most substantial change of carbon dynamics in river corridors. We argue that the morphology and processes of a river corridor regulate the ability to store, transform, and transport OC, and that people are pervasive modifiers of river morphology and processes. The net effect of most human activities, with the notable exception of reservoir construction, appears to be that of reducing the ability of river corridors to store OC within biota and sediment, which effectively converts river corridors to OC sources rather than OC sinks. We conclude by summarizing knowledge gaps in OC dynamics and the implications of our findings for managing OC dynamics within river corridors.

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Carbon storage and soil organic matter stabilisation in near-natural, restored and embanked Swiss floodplains

Cited by 26 publications

References 40 publications

Comparison of topsoil organic carbon and total nitrogen in different flood-risk riparian zones in a Chinese Karst area

Comparison of topsoil organic carbon and total nitrogen in different flood-risk riparian zones in a Chinese Karst area

Coupling X-ray computed tomography and freeze-coring for the analysis of fine-grained low-cohesive soils

Carbon dynamics of river corridors and the effects of human alterations

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