Soizic Morin

Soizic Morin
French National Institute for Agriculture, Food, and Environment (INRAE) | INRAE · Unité de recherches EABX - ECOVEA

PhD

About

159
Publications
63,609
Reads
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3,564
Citations
Citations since 2017
71 Research Items
2188 Citations
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20172018201920202021202220230100200300400
20172018201920202021202220230100200300400
Additional affiliations
September 2009 - present
French National Institute for Agriculture, Food, and Environment (INRAE)
Position
  • Chargée de recherches
January 2009 - August 2009
Universitat de Girona
December 2003 - November 2006
Université Bordeaux 1
Position
  • PhD Student

Publications

Publications (159)
Preprint
Full-text available
This work reports the polar lipid profiles of two freshwater algae: the diatom Nitzschia palea, widespread alga that typically inhabits freshwater ponds and rivers, and the Scenedesmus costatus, a common green alga. HILIC-ESI-MS/MS analysis was used to determine and quantify the major phospholipids and glycolipids, and their relative molecular spec...
Preprint
Full-text available
This paper describes an automatized multi-step methodology in order to identify the relationships between integrative pesticide quantifications and land-use on a given watershed. This methodology contains multivariate statistical analyses such as hierarchical cluster analysis (HCA) and principal component analysis (PCA), which are commonly used for...
Article
Metals are naturally present in freshwater ecosystems but anthropogenic activities like mining operations represent a long-standing concern. Metals released into aquatic environments may affect microbial communities such as periphytic biofilm, which plays a key role as a primary producer in stream ecosystems. Using two 28-day microcosm studies invo...
Article
Full-text available
Plastics, especially microplastics (<5 mm in length), are anthropogenic polymer particles that have been detected in almost all environments. Microplastics are extremely persistent pollutants and act as long-lasting reactive surfaces for additives, organic matter, and toxic substances. Biofilms are microbial assemblages that act as a sink for parti...
Article
Full-text available
Freshwater biofilms have been increasingly used during the last decade in ecotoxicology due to their ecological relevance to assess the effect(s) of environmental stress at the community level. Despite growing knowledge about the effect of various stressors on the structure and the function of these microbial communities, a strong research effort i...
Article
While metal impacts on fluvial communities have been extensively investigated, effects of abiotic parameters on community responses to contaminants are poorly documented. Variations of photoperiod and temperature commonly occur over the course of a season and could affect aquatic biofilm communities and their responses to contaminants. The objectiv...
Article
Full-text available
Effect-directed analysis (EDA) aims at identifying the compound(s) responsible for toxicity in a complex environmental sample where several dozens of contaminants can be present. In this study, we used an environmental mixture extracted from the Polar Organic Chemical Integrative Sampler (POCIS) previously immersed downstream a landfill (River Pont...
Article
Full-text available
Face à la dégradation des milieux aquatiques soumis aux pressions anthropiques, la Directive Cadre sur l’Eau a été mise en place pour les préserver, via notamment des programmes de suivi permettant d’en évaluer la qualité chimique et écologique. Toutefois, dans un contexte généralisé de contamination par les micropolluants, ces suivis et les mesure...
Book
Full-text available
Les plans d’eau sont des écosystèmes complexes, multifonctionnels et, en même temps, fragiles. Ces milieux aquatiques fournissent de nombreux services écosystémiques, en assurant des fonctions de support (production primaire, biodiversité), de régulation (épuration des nutriments, régulation des flux hydriques), d’approvisionnement (eau potable, ir...
Article
Full-text available
Few ecotoxicity studies are available on thorium (Th) which hinders the ability to evaluate its ecotoxicological risk. Its release in the environment is often associated with the extraction of rare earth elements and uranium, as well as the field applications of phosphate fertilizers. This study investigates the effects of Th on microbial communiti...
Article
Full-text available
Since the early 1920s, the intensive use of antibiotics has led to the contamination of the aquatic environment through diffuse sources and wastewater effluents. The antibiotics commonly found in surface waters include sulfamethoxazole (SMX) and sulfamethazine (SMZ), which belong to the class of sulfonamides, the oldest antibiotic class still in us...
Article
In freshwater environments, microorganisms such as microalgae are influenced by the concentrations of dissolved chemicals but can modify the fate of these substances by biosorption, accumulation and even metabolization. In this laboratory study, we assessed the growth and physiology of non-axenic cultures of the chlorophyte Sphaerellopsis sp. expos...
Article
Aquatic ecotoxicological risks associated with tetravalent metallic elements such as thorium (Th) are still poorly understood. Periphytic biofilm represents an important food source in aquatic environments, thus such risks could severely affect nutrient and energy cycling in these ecosystems. The present study investigated the potential for Th to c...
Article
Potash abandoned mines cause severe environmental damage to their bordering environment, with significant impacts on freshwater ecosystems mostly through uncontrolled discharge of hypersaline effluents. This study aimed to evaluate the ecological impact caused by a hypersaline effluent from an abandoned potash mine (Menteroda, Germany) on freshwate...
Article
Despite their proven reliability for revealing 'acceptable' degrees of toxicity in waste-and reclaimed waters, bioassays are rarely used to assess the toxicity of hazardous contaminants present in natural waters. In this study, we used organisms from different trophic levels to assess the toxicity of water samples collected from four different Sout...
Article
In the present study, the ecological status of four major South Korean rivers flowing near industrial complexes is assessed using physico-chemical analyses and various descriptors based on benthic diatom assemblages. Principal component analysis conducted with physical and chemical variables singled-out four sites as more severely impacted (higher...
Article
Eukaryotic Δ6-desaturases are microsomal enzymes that balance the synthesis of ω-3 and ω-6 C18-polyunsaturated-fatty-acids (C18-PUFA) accordingly to their specificity. In several microalgae, including Ostreococcus tauri, plastidic C18-PUFA are strictly regulated by environmental cues suggesting an autonomous control of Δ6-desaturation of plastidic...
Article
Full-text available
While the important role of algae and bacteria is widely recognized in freshwater ecosystems, that of minute grazers, despite their high abundance, remains poorly understood. By their consumption of microalgae, their role in the microbial loop, and even their movements in the biofilm, they improve the rejuvenation of this type of ecosystem and have...
Chapter
Diatom identification must consider the large variability in both morphological and morphometric features, characteristic of this group of microorganisms. This chapter describes variations in shape/size observed in diatom populations either as a consequence of their particular asexual reproductive cycle or induced by environmental conditions. Conce...
Article
Remains of corroded diatoms were found on one strand of hair from the relics of Holy Mary-Magdalene. It was initially hypothesized that they could be tracers of her living environment, the cave of La Sainte-Baume reputed to be the place of her thirty-year retreat before she died. To validate this assumption, ten samples collected in the cave of La...
Article
The herbicide diuron and the insecticide imidacloprid are amongst the most frequently detected pesticides in French rivers, and each is known to affect many aquatic organisms. However, the question of whether and how both pesticides together might induce multi-stress conditions, which could induce indirect effects such as the modification of biolog...
Article
Pesticides are increasingly used worldwide to protect crops. However, only a small fraction of pesticides really hit their target organisms, with the remaining fraction reaching the environment by several phenomena such as leaching, and ending up in aquatic ecosystems: the final receptor of micropollutants. Chemical stressors induce changes in taxo...
Article
Full-text available
This review is focused on the biogeochemistry of arsenic in freshwaters and, especially, on the key role that benthic microalgae and prokaryotic communities from biofilms play together in through speciation, distribution, and cycling. These microorganisms incorporate the dominant iAs (inorganic arsenic) form and may transform it to other arsenic fo...
Chapter
In freshwater environments, microbial assemblages attached to submerged substrates play an essential role in ecosystem processes such as primary production, supported by periphyton, or organic matter decomposition, supported by microbial communities attached to leaf litter or sediments. These microbial assemblages, also called biofilms, are not onl...
Preprint
Eukaryotic Δ6-desaturases are microsomal enzymes which balance the synthesis of ω-3 and ω-6 C18-polyunsaturated-fatty-acids (PUFA) accordingly to their specificity. In several microalgae, including O. tauri , plastidic C18-PUFA are specifically regulated by environmental cues suggesting an autonomous control of Δ6-desaturation of plastidic PUFA. Se...
Article
Full-text available
Variations of temperature and photoperiod throughout different seasons can affect aquatic communities such as biofilms. Biofilms, generally present at the base of trophic chains in freshwaters, are also subject to organic contamination, and are especially affected by herbicides. Many studies have investigated the effect and interactions of herbicid...
Article
Full-text available
Background Microalgae play a key role in ecosystems and are widely used in ecological status assessment. Research focusing on such organisms is then well developed and essential. Anyway, approaches for a better comprehension of their metabolome’s response towards anthropogenic stressors are only emerging. Aim of review This review presents the bio...
Article
The neonicotinoid imidacloprid and the herbicide diuron are long‐lived pesticides commonly detected in European rivers. Both have lethal as well as sublethal effects on aquatic invertebrates dwelling in streambeds. Here, we performed lethality tests of imidacloprid and diuron on seven species of widespread, free‐living nematodes and the model organ...
Article
Diatom teratologies have intrigued scientists since the XIXth century, with respect to their causes and origins. These deformities, mainly observed in long-term cultures or under high levels of pollution, were poorly considered, until they were recently found to be potential indicators of toxic impairment of freshwaters. However, very little is kno...
Article
Full-text available
The majority of studies on biofilms have focused on autotrophic and bacterial taxa, without considering the potential effects on biofilm grazers. In this work, we investigated the effects of realistic environmental concentrations of zirconium (Zr) on periphyton algal growth and micromeiofauna biodiversity. Glass slides were submerged in a pond for...
Article
The restoration and the preservation of aquatics ecosystems is a critical issue in our contemporary society. In lake ecosystems, phytoplankton taxonomic-based indicators have been developed to evaluate water quality, but suffer of limited ecosystem ecological value. The recent development of functional approaches may allow to evaluate other aspects...
Article
Most pesticides used in agriculture end up in the aquatic environment through runoff and leaching of treated crops. One of the most commonly used herbicides is glyphosate. This compound or its metabolites are frequently detected in surface water in Europe. In the present study, in vivo and in vitro studies were carried out using the early life stag...
Article
Full-text available
Nunavik (Northern Quebec, Canada) is experiencing a mining boom. While several studies have been conducted in the region in relation to climate change, the effects of mining have received much less attention. In this study, we explored the use of biofilms in natural streams as an indicator of potential stress on living organisms caused by metal con...
Article
Full-text available
Antibiotics have a wide application range in human and veterinary medicines. Being designed for pharmacological stability, most antibiotics are recalcitrant to biodegradation after ingestion and can be persistent in the environment. Antibiotic residues have been detected as contaminants in various environmental compartments where they cause human a...
Article
Fatty acids (FA) are crucial for the maintenance of membrane fluidity and play a central role in metabolic energy storage. Polyunsaturated fatty acids play an essential ecological role since they are key parameters in the nutritional value of algae. Pesticide impacts on fatty acid profiles have been documented in marine microalgae, but remain under...
Poster
Full-text available
Freshwater is presently under a range of increasing pressures, some of which are directly due to anthropogenic activities as agricultural practices or urban activites and may have effects on aquatic organisms, even at low concentration levels. Biofilms are communities of microorganisms (bacteria, algae, protozoa, fungi) and meiofaune integrated in...
Article
Full-text available
Despite their proven reliability for revealing ‘acceptable’ degrees of toxicity in waste- and reclaimed waters, bioassays are rarely used to assess the toxicity of hazardous contaminants present in natural waters. In this study, we used organisms from different trophic levels to assess the toxicity of water samples collected from four different Sou...
Article
Full-text available
The supposed relics of “Mary-Magdalene” are preserved in Provence (France) in an ancient tradition. They consist of a dry skull and a lock of hair. For the first time, they were officially subjected to an extensive medico-surgical examination by photogrammetry, high-magnification binocular lenses, scanning electron microscope, and energy-dispersive...
Article
Full-text available
The majority of studies on biofilms have focused on autotrophic and bacterial taxa, without considering the potential effects on biofilm grazers. In this work, we investigated the effects of realistic environmental concentrations of zirconium (Zr) on periphyton algal growth and micromeiofauna biodiversity. Glass slides were submerged in a pond for four...
Article
Full-text available
Contamination by herbicides is reported in most freshwater environments. These biologically active compounds may impact the non-target biota such as benthic biofilms, at the base of the trophic chain. In agricultural watersheds, herbicides occur as pulses in the system, and traditional dose-response analysis performed at a given duration of exposur...
Article
Biofilms are considered as good bioindicators of contamination by means of their capacity to react quickly to xenobiotics exposure, and their pivotal role in sustaining the aquatic trophic web. The exchanges of dissolved substances between water column and biofilm can be modulated by flow velocity. This study deals with toxicokinetic (transfer mech...
Article
Biofilms are excellent bioindicators for water quality assessment because of their ability to integrate contamination, and their position at the base of the trophic chain in aquatic environments. Pesticides are ubiquitous in aquatic environments and can constantly interact with aquatic organisms, including those that make up biofilms, at fluctuatin...
Article
Full-text available
Aquatic ecosystems are generally subjected to multiple perturbations due to simultaneous or successive combinations of various natural and anthropogenic environmental pressures. To better assess and predict the resulting ecological consequences, increasing attention should be given to the accumulation of stresses on freshwater ecosystems and its ef...
Article
Deformities in diatoms are increasingly used as an indicator of toxic stress in freshwaters. However, the percentage of deformities alone often fails at highlighting the magnitude of toxic exposure. An approach combining the assessment of deformities coupled with information on their severity could improve the sensitivity of this biomarker. With th...
Article
Gold mining activities in fluvial systems may cause arsenic (As) pollution, as is the case at the Anllóns River (Galicia, NW Spain), where high concentrations of arsenate (AsV) in surface sediments (up to 270 mg kg-1) were found. A 51 day-long biofilm-translocation experiment was performed in this river, moving some biofilm-colonized substrata from...
Article
Full-text available
Abstract: Sudbury (Ontario, Canada) has a long mining history that has left the region with a distinctive legacy of environmental impacts. Several actions have been undertaken since the 1970s to rehabilitate this deteriorated environment, in both terrestrial and aquatic ecosystems. Despite a marked increase in environmental health, we show that the...
Article
Microalgae, which are the foundation of aquatic food webs, may be the indirect target of herbicides used for agricultural and urban applications. Microalgae also interact with other compounds from their environment, such as natural dissolved organic matter (DOM), which can itself interact with herbicides. This study aimed to evaluate the influence...
Article
Full-text available
In the present study, the ecological status of four major South Korean rivers flowing near industrial complexes is assessed using physico-chemical analyses and various descriptors based on benthic diatom assemblages. Principal component analysis conducted with physical and chemical variables singled-out four sites as more severely impacted (higher...
Book
Full-text available
Programme et résumés des présentations du 36 ème colloque des l'Association des Diatomistes de Langue Française, Dijon septembre 2017.
Technical Report
Full-text available
Le pourcentage de déformations des diatomées est de plus en plus utilisé comme un indicateur de stress toxique dans les cours d’eau. Cependant, ce pourcentage ne permet pas de quantifier directement l’importance de ce stress, et certains auteurs suggèrent que la quantification de la « sévérité » des déformations pourrait améliorer les relations de...
Article
By measuring levels of tolerance to toxicants in microbial communities using functional toxicity tests under controlled conditions, pollution-induced community tolerance (PICT) approaches offer an effect-based tool to assess the ecological risk of chemicals in aquatic systems. However, induced tolerance of exposed microbial communities cannot alway...
Article
Full-text available
Biological communities in aquatic environments most commonly face multiple stress, where natural and anthropogenic stressors often act jointly. Their interactions are most easily assessed using short cycle organisms such as periphytic diatoms. In this experiment, we analyzed the combined effects of copper exposure and warming on diatom successions...
Article
An initial inventory of diatom biodiversity at 12 sites draining into Lake Ichkeul, northern Tunisia, was performed in summer 2014, together with the characterisation of metal pollution status by analysing trace metal concentrations to determine Water Quality Indices. The maximum values of Fe, Mn, Sb, Zn, Cu and Pb were all below the national and i...
Article
Full-text available
Complexity of contaminants exposure needs to be taking in account for an appropriate evaluation of risks related to mixtures of pesticides released in the ecosystems. Toxicity assessment of such mixtures can be made through a variety of toxicity tests reflecting different level of biological complexity. This paper reviews the recent developments of...
Article
Full-text available
Interactions between emerging contaminants and other drivers of community structure and function are poorly known. We used laboratory microcosms to investigate the single and combined effects of grazing and triclosan toxicity on the structure and function of stream periphyton. Grazing alone strongly reduced algal biomass, but also reduced oxidative...