Spatial and temporal variations of particulate organic matter from Moselle River and tributaries: A multimolecular investigation

Meur, Mathieu Le; Mansuy-Huault, Laurence; Lorgeoux, Catherine; Bauer, Allan; Gley, Renaud; Vantelon, Delphine; Montargès-Pelletier, Emmanuelle

doi:10.1016/j.orggeochem.2017.04.003

Cited by 19 publications

(10 citation statements)

References 62 publications

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“…More specifically, human disturbance commonly alters fluvial OM toward a more microbial/algal and less plant/soil-derived character. This pattern was first observed for DOM (Cronan et al 1999;Giling et al 2014;Graeber et al 2012;Hosen et al 2014;Masese et al 2016;Parr et al 2015;Williams et al 2010Williams et al , 2016Wilson and Xenopoulos 2009;Yang et al 2012), and recently extended to POM (Boëchat et al 2014;Duan et al 2014;Le Meur et al 2017;Lu et al 2014a, b;Ngugi et al 2016).…”

Section: Introductionmentioning

confidence: 68%

Effects of human land use on the terrestrial and aquatic sources of fluvial organic matter in a temperate river basin (The Meuse River, Belgium)

et al. 2017

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The impact of human activities on the concentrations and composition of dissolved organic matter (DOM) and particulate organic matter (POM) was investigated in the Walloon Region of the Meuse River basin (Belgium). Water samples were collected at different hydrological periods along a gradient of human disturbance (50 sampling sites ranging from 8.0 to 20,407 km 2 ) and during a 1.5 year monitoring of the Meuse River at the city of Liège. This dataset was completed by the characterization of the DOM pool in groundwaters. The composition of DOM and POM was investigated through elemental (C:N ratios), isotopic (d 13 C) and optical measurements including excitation emission matrix fluorescence with parallel factor analysis (EEM-PARAFAC). Land use was a major driver on fluvial OM composition at the regional scale of the Meuse Basin, the composition of both fluvial DOM and POM pools showing a shift toward a more microbial/algal and less plant/soil-derived character as human disturbance increased. The comparison of DOM composition between surface and groundwaters demonstrated that this pattern can be attributed in part to the transformation of terrestrial sources by agricultural practices that promote the decomposition of soil organic matter in agricultural lands and subsequent microbial inputs in terrestrial sources. In parallel, human land had contrasting effects on the autochthonous production of DOM and POM. While the in-stream generation of fresh DOM through biological activity was promoted in urban areas, summer autochthonous POM production was not influenced by land use. Finally, soil erosion by agricultural management practices favored the transfer of terrestrial organic matter via the particulate phase. Stable isotope data suggest that the hydrological transfer of terrestrial DOM and POM in humanimpacted catchment are not subject to the same controls, and that physical exchange between these two pools of organic matter is limited.

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Section: Introductionmentioning

confidence: 68%

Effects of human land use on the terrestrial and aquatic sources of fluvial organic matter in a temperate river basin (The Meuse River, Belgium)

et al. 2017

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“…Studies of both the spatial and temporal variability of fluvial POC have been done in the catchments of the Moselle in France (11,500 km 2 , Le Meur et al, 2017) and the Amazon (6,300,00 km 2 , Aufdenkampe et al, 2007). It is apparent from these and other studies that the POC is a dynamic entity as it travels downstream.…”

Section: Discussionmentioning

confidence: 99%

“…In this study, a broad spectrum, compound-specific approach was used to complement stable isotope and elemental ratio information. The broad-spectrum biomarker scope enables observation of a wide range of compounds that can be sourcespecific, while at the same time providing a perspective that approaches that of the bulk sample because of the compound diversity (Le Meur et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Storm-Induced Dynamics of Particulate Organic Carbon in Clear Creek, Iowa: An Intensively Managed Landscape Critical Zone Observatory Story

et al. 2020

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Rivers integrate and transport particulate organic carbon (POC) from multiple sources with varied diagenetic histories. A significant amount of POC is delivered to rivers during storm events, but the sources and fates of the mobilized material are often unclear.To gauge the variability of input sources, this study uses a biomarker approach that broadly characterizes organic matter at the molecular level. Suspended sediment was collected during a storm in October 2015 at three nested sampling locations along Clear Creek in Iowa, U.S.A. Supplemented with bulk elemental and C-isotopic measurements, biomarker analyses were obtained to identify changes in sources and the diagenetic state of the POC. Fatty acid-rich organic matter was attributed to the mobilization of algal mats in the stream channel at the early stage of the storm as precipitation initiated and water velocities began to increase. A significant contribution of lignin-rich material occurred at peak precipitation and elevated discharge signifying soil sources. Tracers for partially oxidized lignin and soil organic matter suggested that this was a partially time-resolved mixture of fresh and degraded material. Storm-induced variations of biomarkers were observed at the three sampling stations located throughout the watershed. The mixing patterns became more complex as the storm pulse moved downstream due to the additive contributions of multiple tributaries and the hypothesized increasing importance of alluvial bank erosion. This erosional increase is attributed to a systematic transition in basin geomorphology from a V-shape in the upper reach to a wider box-shaped valley in the lower reach. Even though biomarker concentration measurements revealed a diversity of sources over time, the complex mixture of POC associated with peak discharge dominated the flux of material downstream. This study highlights the complexity of storm-initiated C-transport and the need for high spaciotemporal resolution broad spectrum tracer studies in the future.

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“…Those assemblies will be referred to as binary or ternary aggregates depending on the number of components used to prepare them. The selection of these building components is motivated by the predominance of illite particles in the clay mineralogy of river SPM (Le Le Meur et al, 2017), the targeted natural particles. Iron (hydr)oxide coatings were commonly reported in soil micro-aggregates (Goldberg, 1989;Colombo and Torrent, 1991;Kleber et al, 2007;Totsche et al, 2018;Gao et al, 2020;Krause et al, 2020) and were also evidenced in river suspended particulate matter (SPM) (Le .…”

Section: Introductionmentioning

confidence: 99%

Controlled assembly of heterogeneous aggregates of clay, iron hydr(oxydes) and polysaccharide: Effects of preparation conditions

Henry

Montargès-Pelletier

Bihannic

et al. 2022

Applied Clay Science

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Spatial and temporal variations of particulate organic matter from Moselle River and tributaries: A multimolecular investigation

Cited by 19 publications

References 62 publications

Effects of human land use on the terrestrial and aquatic sources of fluvial organic matter in a temperate river basin (The Meuse River, Belgium)

Effects of human land use on the terrestrial and aquatic sources of fluvial organic matter in a temperate river basin (The Meuse River, Belgium)

Storm-Induced Dynamics of Particulate Organic Carbon in Clear Creek, Iowa: An Intensively Managed Landscape Critical Zone Observatory Story

Controlled assembly of heterogeneous aggregates of clay, iron hydr(oxydes) and polysaccharide: Effects of preparation conditions

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