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  • Anne Jaffrezic
Anne Jaffrezic

Anne Jaffrezic
Agrocampus Ouest · Department of Physical Environment, Landscape Architecture and Territorial Development

PhD, HDR

About

88
Publications
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1,815
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Publications

Publications (88)
Article
Full-text available
Stream water chemistry is routinely measured over time at fixed and sparse sites, which provides a coarse image of spatial variability. Here, we measured nitrate, dissolved organic carbon (DOC) and several chemical proxies for water flowpaths, catchment residence time and biogeochemical transformations, every 50-100m along 13km of streams in six ag...
Article
Full-text available
This study investigates the combined effects of land management and hydrology on the temporal dynamics of dissolved organic matter (DOM) quantity and composition in stream water and groundwaters in an agricultural watershed. We assessed dissolved organic carbon (DOC) concentrations, DOM UV–Vis absorbance, and DOM fluorescence in groundwater under c...
Article
Full-text available
Agriculture affects the biogeochemical cycles of carbon, nitrogen, and phosphorus, leading to a deterioration of surface water quality. The increasing magnitude of climate change raises questions about potential additional or mitigating effects of climate change on this deterioration. One way to understand these potential effects is to cross‐analyz...
Article
Full-text available
This article presents a dataset on nitrate, nitrite and dissolved organic carbon (DOC) losses measured for 4 years using lysimeters at the EFELE long-term experimental site (Le Rheu, France). This ongoing long-term study was designed to provide information on effects of organic waste product (OWP) application and soil tillage on crop production, so...
Article
Full-text available
As a critical interface in the environment, soils can provide a wide range of ecosystem services (ES). However, while there is growing demand to assess soil ES from agricultural systems, considering them in land management strategies remains a challenge. Indeed, because of the difficulty in relating soil properties to ES, soil ES are still not full...
Technical Report
Full-text available
L’objectif du projet DEMAiN (septembre 2018 – décembre 2019) est d’identifier les zones d’émission et d’abattement du nitrate, grâce à une mesure de la qualité de l’eau à une résolution spatiale fine : une mesure tous les 50 à 100m le long de profils de rivières. Environ 15 km de cours d’eau ont été cartographiés à quatre reprises au sein de huit s...
Preprint
The plurality and non-linearity of hydrological processes across scales has been identified as a limit to modeling and regionalization. This issue has been addressed after identification of emergent stabilized signals on small catchments (1-20 km²) using the concept of Representative Elementary Area (REA), but the question remains open for larger c...
Preprint
A conceptual framework is developed to summarize the emergence of archetypal and hybrid behaviors due to geography (land cover, geology, and meteorology), topological branching, and size.
Article
In intensive livestock areas, veterinary pharmaceutical residues (VPRs) can occur in water resources, but also in tap water because treatment processes are not designed to remove these contaminants. The main objective of this study is to assess the occurrence of VPRs in water resources and tap waters in Brittany. As several identical compounds are...
Article
Full-text available
The AgrHyS is a long-term agro-hydrological observatory dedicated to studying the processes controlling hydro-chemical fluxes in headwater catchments in response to the effects of agricultural. AgrHyS is composed of instrumented catchments located in western France in a temperate oceanic climate that are characterized by shallow groundwater (<8 m d...
Article
Full-text available
Afin de développer une agriculture plus respectueuse de l'environnement, et capable de nourrir la population, les interactions entre le sol et les plantes sont un levier prometteur. En effet, les plantes sont capables de modifier profondément leur environnement racinaire, la rhizosphère, soit directement soit indirectement en établissant des liens...
Article
Veterinary pharmaceuticals (VPs) increasingly used in animal husbandry have led to their presence in aquatic environments -surface water (SW) or groundwater (GW) - and even in tap water. This review focuses on studies from 2007 to 2017. Sixty-eight different veterinary pharmaceutical residues (VPRs) have been quantified worldwide in natural waters...
Article
The response of stream chemistry to storm is of major interest for understanding the export of dissolved and particulate species from catchments. The related challenge is the identification of active hydrological flow paths during these events and of the sources of chemical elements for which these events are hot moments of exports. An original fou...
Article
Veterinary pharmaceuticals, widely used in intensive livestock production, may contaminate surface waters. Identifying their sources and pathways in watersheds is difficult because i) most veterinary pharmaceuticals are used in human medicine as well and ii) septic or sewer wastewater treatment plants (WWTP) can release pharmaceuticals into surface...
Article
Biogeochemistry of dissolved organic matter (DOM) is important to ecology, ecotoxicology and the carbon cycle. DOM is operationally defined as the OM fraction that passes through filters. Since different filter pore-sizes, ranging from 0.2 to 0.7 μm, are commonly used, it is necessary to test if this choice has an effect on the concentration and co...
Conference Paper
Full-text available
Storm events are critical hot moments of emission for several dissolved and particulate chemical species at major stake for water quality (e.g. dissolved organic carbon DOC, suspended sediments, phosphorus). During such events, the solutes or particles are exported from heterogeneous sources through various pathways to stream leading to specific in...
Article
Full-text available
As a phenomenon integrating climate conditions and hydrological control of the connection between streams and terrestrial dissolved organic carbon (DOC) sources, groundwater dynamics control patterns of stream DOC characteristics (concentrations and fluxes). Influence of intra-annual variations in groundwater level, discharge and climatic factors o...
Article
Full-text available
Because of the high sorption affinity of phosphorus (P) for the soil solid phase, mitigation options to reduce diffuse P transfer usually focus on trapping particulate P delivered via surface flow paths. Therefore, placing riparian buffers between croplands and watercourses has been promoted worldwide, sometimes in wetland areas. To investigate the...
Article
Full-text available
Spatio-temporal modifications of the composition of dissolved organic matter (DOM) from a wetland in an agricultural catchment were investigated using thermally assisted hydrolysis and methylation with tetramethylammonium hydroxide coupled to gas chromatography and mass spectrometry (THM-GC-MS). The results were compared with previous data acquired...
Article
Full-text available
Monitoring the isotopic composition (δ 13 C DOC) of dissolved organic carbon (DOC) during flood events can be helpful for locating DOC sources in catchments and quanti-fying their relative contribution to stream DOC flux. High-resolution (< hourly basis) δ 13 C DOC data were obtained dur-ing six successive storm events occurring during the high-flo...
Article
Full-text available
L'hydromorphie des sols est l'expression d'un engorgement en eau plus ou moins prolongé et d'un déficit en oxygène agissant sur leurs propriétés et leurs fonctionnalités. Elle s'exprime en prenant la forme de traits morphologiques souvent persistants, résultant de la dynamique du fer et du manganèse. La profondeur d'apparition, le degré d'hydromorp...
Article
Full-text available
L’hydromorphie des sols est l’expression d’un engorgement en eau plus ou moins prolongé et d’un déficit en oxygène agissant surleurs propriétés et leurs fonctionnalités. Elle s’exprime en prenant la forme de traits morphologiques souvent persistants, résultant dela dynamique du fer et du manganèse. La profondeur d’apparition, le degré d’hydromorphi...
Article
Monitoring the isotopic composition (δ13CDOC) of dissolved organic carbon (DOC) during flood events can be helpful for locating DOC sources in catchments and quantifying their relative contribution to DOC stream flux. High-resolution (< hourly basis) δ13CDOC data were obtained on six successive storm events occurring during the high-flow period in...
Article
Full-text available
To obtain better constraints on the control of seasonal hydrological variations on dissolved organic carbon (DOC) dynamics in headwater catchments, we combined hydrometric monitoring with high-frequency analyses of DOC concentration and DOC chemical composition (specific UV adsorption, δ13C) in soil and stream waters during one complete hydrologica...
Technical Report
Full-text available
Afin d’évaluer les risques pour les écosystèmes ou pour la santé publique liés à la présence de résidus pharmaceutiques (RP) dans les eaux naturelles, il est nécessaire de quantifier une grande diversité de produits à des concentrations parfois très faibles (ng.L-1). Les méthodes analytiques pour la quantification de ces RP sont aujourd’hui très dé...
Article
Dissolved organic matter (DOM) is implied in (i) ecosystem services such as the support of biodiversity, (ii) the alteration of the drinkable water quality by formation of trihalomethane and (iii) the transfer of micropollutants from soils to rivers. Moreover, since DOM connects soils and oceans that are interacting with the atmosphere, understandi...
Article
Stream water chemistry is highly variable in space and time, therefore high frequency water quality measurement methods are likely to lead to conceptual advances in the hydrological sciences. Sub-daily data on water quality improve the characterization of pollutant sources and pathways during flood events as well as during long-term periods [1]. Ho...
Article
Full-text available
High-frequency, long-term and multisolute measurements are required to assess the impact of human pressures on water quality due to (i) the high temporal and spatial variability of climate and human activity and (ii) the fact that chemical solutes combine short- and long-term dynamics. Such data series are scarce. This study, based on an original a...
Article
Full-text available
Assessing the impact of human pressures on water quality is difficult. First, there is a high temporal and spatial variability of climate and human activity. Second, chemical elements have their own characteristics mixing short and long term dynamics. High frequency, long-term and multi-element measurements are required. But, such data series are s...
Article
Full-text available
La pollution organique issue des effluents d'élevage et des stations d'épuration urbaines conduit à un problème essentiel de santé publique lié à la contamination des eaux de surface où s'exercent des activités sensibles telles que la baignade. S'il est possible de déterminer les pollutions localisées liées à un dysfonctionnement des systèmes de tr...
Article
- Dans le contexte de la Directive 2006/7/CE qui demande de constituer des profils de baignade nécessitant une identification et une hiérarchisation des sources de pollutions fécales, six laboratoires de recherche français se sont associés pour développer une boîte à outils constituée de marqueurs chimiques et microbiologiques destinée à déterminer...
Article
In the context of the 2006/7/EC directive requiring to establish a profile for each bathing water, with the identification and hierarchization of faecal pollution sources, six French research laboratories have worked together to develop a Microbial Source Tracking (MST) toolbox including microbial and chemical markers to determine the human and ani...
Article
Fecal contamination of water resources is evaluated by the enumeration of the fecal coliforms and Enterococci. However, the enumeration of these indicators does not allow us to differentiate between the sources of fecal contamination. Therefore, it is important to use alternative indicators of fecal contamination to identify livestock contamination...
Conference Paper
Cattle and pig manure contain pathogenic micro-organisms which can be transferred to soil through land spreading and thence to surface water. Such faecal pollution may pose risks to human health. However, the bacteria currently monitored to assess faecal pollution (E. coli, faecal coliforms and enterococci) do not distinguish between faecal polluti...
Article
The microbiological quality of coastal or river waters can be affected by faecal pollution from human or animal sources. An efficient MST (Microbial Source Tracking) toolbox consisting of several host-specific markers would therefore be valuable for identifying the origin of the faecal pollution in the environment and thus for effective resource ma...
Article
Full-text available
The controls of DOC concentrations in headwater streams are actively investigated to understand how the current and future changes in climate and landuses may affect the fluxes of soluble organic compounds and associated elements. Most studies agree that saturated areas in bottomlands play a major part as a source of DOC, but the dynamics of the pr...
Article
The persistence of potential tracers of dissolved organic matter (DOM) generated from farm waste-amended soil was investigated by fluorescence spectroscopy coupled with classification and regression tree (CART) and principal component analysis (PCA) during a short-term (8 days) to midterm (60 days) biodegradation study. Pig manure (PM), cow manure...
Article
EEM fluorescence characterization of farm manures and farm waste impacted natural stream waters
Article
The characterization of Dissolved Organic Matter (DOM) sources in catchments is essential in proposing management actions to restore stream water quality. However, few studies have been conducted in agricultural catchments. In the present study, theripar
Article
Fecal pollution affects environmental waters through spreading of animal manure and runoff of agricultural soils. However, the indicator bacteria (E. coli and enterococci) do not identify the source of the contamination and the development of fecal source tracking tools is crucial for water management and remediation. The aim of our study was to ev...
Article
Increasing dissolved organic carbon (DOC) concentrations have been reported during the last 15 years in streams from the United Kingdom, Northern Europe and North America. Identifying the sources of DOC and the controls of the delivery to the stream is important to understand the significance of these trends. This relies on the availability of obse...
Article
Soluble organic fractions from soils of two agricultural sites from Brittany (France) have been analyzed to (i) identify the source of polar compounds in soils and (ii) evaluate the impact of organic fertilization and crop type on the distribution and concentration of polar compounds in soils. The main sources of polar compounds in soils are higher...
Article
Chemical erosion rates have been determined on two upland granitic catchments under agricultural pressure in Brittany, France. Intensive agriculture has been carried out for at least 30 years in this region. The influence of geochemical processes related to agriculture on the chemistry of streamwaters is determined through a geochemical mass balanc...
Article
The HydroStruct software application is dedicated to the combined spatial, topological and scaling analysis of the morphometry of river networks. It was also developed to easily link geomorphometric observations with hydrological analysis and modelling approaches, such as geomorphology-based transfer functions and accounting for associated dominant...
Article
Fate of fluorescent dissolved organic matter (FDOM) released from poultry : manure applied in cultivated soils: A biodegradation study.