Publications

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the contribution of fungal enzymes to the digestion of leaves by gammarus fossarum koch (amphipoda).gut extracts of gammarus fossarum liberated reducing substances (at ph values ≤7) and amino acids (ph≥7) from freshly shed oak leaves only after removal of soluble leaf phenols. when carboxymethylcellulose was used at a concentration equal to that of leaf cellulose, release of reducing substances was considerably higher. fungal enzymes extracted from decomposing leaves were active against structural carbohydrates but showed no proteolytic activity. at low ph values, they retained their full acti ...198228310100
ventilatory and locomotory activities in anoxia and subsequent recovery of epigean and hypogean crustaceans.locomotory and ventilatory responses to severe hypoxia and subsequent recovery were investigated in 3 amphipod crustaceans: 2 hypogean species (1 interstitial species niphargus rhenorhodanensis and 1 karstic species n. virei) and 1 epigean species (gammarus fossarum), and in an epigean population of 1 isopod crustacean (asellus aquaticus). these species displayed respectively 46.7 h, 52.1 h, 6.3 h and 19.7 h lethal times for 50% of the population (lt50) values for anoxic survival. the aim of thi ...19957671005
the activities of enzymes associated with the intermediary and energy metabolism in hypogean and epigean crustaceans.the activities of 18 enzymes involved in the intermediary and energy metabolism were measured in certain widely-spread peracarid crustaceans: 3 hypogean (niphargus virei, niphargus rhenorhodanensis and stenasellus virei) and 2 epigean (gammarus fossarum and asellus aquaticus) ones. the activities of numerous enzymes were correlated with the known metabolic rates of the 5 species. such rates are reduced in hypogean organisms: levels of enzymatic activity in subterranean species were 1.2 to 8.6 ti ...19969091176
the amphipod gammarus fossarum as a natural true intermediate host of the nematode raphidascaris acus.a single third-stage larva of the fish nematode raphidascaris acus (bloch, 1779) (body length 1.77 mm) was found in 1 of 775 gammarids gammarus fossarum koch examined from the jihlava river, czech republic. this is the first confirmed record of the advanced l, of this species from an invertebrate host, showing that an invertebrate may serve as true intermediate host of this nematode, in addition to lower aquatic vertebrates. until now, invertebrates have generally been considered as paratenic ho ...19968691386
comparative study on the metabolic responses of subterranean and surface-dwelling amphipods to long-term starvation and subsequent refeedingthe effects of long-term starvation and subsequent refeeding on intermediary and energy metabolism were investigated in two subterranean aquatic crustaceans, niphargus rhenorhodanensis and niphargus virei, and in a morphologically similar surface-dwelling species, gammarus fossarum. the metabolic response to prolonged food deprivation was monophasic in g. fossarum, showing an immediate, linear and large decline in all of the energy reserves. in contrast, both subterranean organisms displayed suc ...199910574735
mitochondrial dna variation and the evolutionary history of cryptic gammarus fossarum types.the evolutionary history of the cryptic gammarus fossarum species complex (crustacea, amphipoda) in central europe was approached by investigating the genetic variation in populations of a natural contact zone. nucleotide sequence variation of a 395-bp segment of the mitochondrial 16s rrna gene was compared to that of six nuclear allozyme loci. three major mtdna lineages were found, the eastern clade being consistent with the former allozyme type a. the two western clades (types b and c) were no ...200010837155
toxicity and bioaccumulation of arsenic and chromium in epigean and hypogean freshwater macroinvertebrates.lethal toxicity levels of two inorganic water pollutants, chromium (cr6+) and arsenic (as3+), were determined toward six freshwater macroinvertebrate species collected from a single field site. crustaceans were represented by two amphipod species, an epigean one (gammarus fossarum) and a hypogean one (niphargus rhenorhodanensis), and by an isopod species (asellus aquaticus). there were two insect larvae, heptagenia sulphurea (ephemeroptera) and hydropsiche pellucidula (trichoptera) and a snail, ...200111443365
hyperventilation and loss of hemolymph na+ and cl- in the freshwater amphipod gammarus fossarum exposed to acid stress: a preliminary study.the effect of acidification on the acid-sensitive species gammarus fossarum was investigated in the laboratory. the results showed that as mortality increased, mean hemolymph chloride and sodium concentrations decreased rapidly. concomitantly, organisms hyperventilated during the first 24 h and then started to hypoventilate. these results demonstrated that exposure to acid stress in the acid-sensitive species g. fossarum led to ion-regulatory and respiratory failure as previously reported in fis ...200111411648
artificial indoor streams as a method to investigate the impact of chemicals on lotic communities.the potential hazard of chemicals on aquatic communities are generally evaluated by standardised single-species bioassays. safety assessment is based on results gained from organisms adapted to lentic systems and biological interactions in ecosystems are neglected. while lotic communities are often at first in contact with chemicals, it is astonishing that microcosms with lentic communities are mainly used as a bridge between laboratory bioassays and outdoor aquatic systems. hence, we establishe ...200111360793
invasion history and genetic population structure of riverine macroinvertebrates.macroinvertebrate communities of large rivers have experienced dramatic species turnovers in the last decades, which still go on. the analysis of genetic population structure plays a central role in understanding and predicting these biological invasions. two points of view are considered: the influence of the invasion history on the genetic structuring and the potential implications of genetic structure for future invasibility. expectations about selectively neutral genetic variation in simple ...200116351849
effects of stream acidification on fungal biomass in decaying beech leaves and leaf palatability.we examined the effect of surface water acidification on rates of decomposition, ergosterol concentrations (as a measure of fungal biomass), and palatability to shredders of common beech leaves (fagus sylvatica l.) in five mountain streams (ph 4.7-7.1). leaf decomposition was significantly faster in the circumneutral streams (ph 6.4-7.1; k > or = 0.00175 d(-1)), when compared to acidic streams (ph 4.7-4.9; k < or = 0.00100 d(-1)). fungal biomass showed no particular trend along the acidification ...200312688687
laboratory simulation of a mining accident: acute toxicity, hsc/hsp70 response, and recovery from stress in gammarus fossarum (crustacea, amphipoda) exposed to a pulse of cadmium.the rate of survival and stress protein (hsc/hsp70) response were investigated in the freshwater amphipod, gammarus fossarum koch, 1835, during a 20-day stress and recovery experiment. adult females and males, were separately exposed to 9 different cadmium concentrations for 5 days to simulate a short-term pulse of xenobiotics in an aquatic environment, followed by a recovery period of 15 days. in terms of mortality, females were much more sensitive to cadmium than males; 4.28 +/- 2.45 microg cd ...200312680701
does the environment or the source of the population define stress status and energy supply in the freshwater amphipod, gammarus fossarum?to investigate the effects of acclimation and/or adaptation on the stress protein (hsc/hsp70) response, adenylate energy charge (ace), atp/adp ratio and both lipid and glycogen supply, specimens of four different populations of the freshwater amphipod gammarus fossarum (koch, 1835) were transplanted and exposed at sites with various levels of pollution. induction of the stress protein response was highest in those gammarids transplanted from nearly unpolluted or just moderately polluted sites to ...200415673217
haemolymph [na+] and [cl-] loss in gammarus fossarum exposed in situ to a wide range of acidic streams.the acid-sensitive amphipod gammarus fossarum was exposed in situ for 24, 96 and 168 h to 18 streams (9 draining from granite and 9 draining from sandstone bedrock), selected in order to provide a wide range of acidification. after 24 h, exposure to slightly acidic (6.00 < or = ph < or = 5.50) and strongly acidic water (ph < 5.50) led to a severe and significant depletion in haemolymph [na+] and [cl-] compared to organisms exposed in circumneutral water. highly significant linear correlations be ...200415584418
metabolic responses to cold in subterranean crustaceans.changes in polyol, sugar and free amino acid (faa) body contents were investigated in the aquatic, subterranean (i.e. hypogean) crustaceans niphargus rhenorhodanensis and niphargus virei and in a morphologically close aquatic, surface-dwelling (i.e. epigean) crustacean gammarus fossarum acclimated to 12 degrees c, 3 degrees c and -2 degrees c. with decreasing temperature, g. fossarum significantly increased its alanine and glutamine levels, while trehalose body content was found to increase abov ...200516043597
riparian plant species loss alters trophic dynamics in detritus-based stream ecosystems.riparian vegetation is closely connected to stream food webs through input of leaf detritus as a primary energy supply, and therefore, any alteration of plant diversity may influence aquatic ecosystem functioning. we measured leaf litter breakdown rate and associated biological parameters in mesh bags in eight headwater streams bordered either with mixed deciduous forest or with beech forest. the variety of leaf litter types in mixed forest results in higher food quality for large-particle inver ...200516096846
endocrine effects in gammarus fossarum (amphipoda): influence of wastewater effluents, temporal variability, and spatial aspects on natural populations.in a field study, individuals of autochthounous populations of the amphipod gammarus fossarum were examined for their maturity status, oocyte development, and biochemical parameters associated with their reproductive cycle. variability in these parameters was related to abiotic exposure parameters varying in accordance to wastewater discharges, stream identity, and time. patterns of all investigated parameters showed predominantly seasonal rather than spatial influence for both exposure and biol ...200515970997
behavioural, ventilatory and respiratory responses of epigean and hypogean crustaceans to different temperatures.impact of temperature (from -2 to 28 degrees c) on survival, oxygen consumption, locomotory and ventilatory activities was measured in two aquatic subterranean crustaceans (niphargus rhenorhodanensis and niphargus virei) and in a morphologically close surface-dwelling crustacean (gammarus fossarum). the hypogean n. virei presented all characteristics of a stenothermal organism: it showed small thermal plasticity and optimised its performance on a narrow range of temperature. in contrast, the epi ...200515893488
physiological recovery from episodic acid stress does not mean population recovery of gammarus fossarum.the physiological responses of the acid-sensitive amphipod gammarus fossarum exposed in situ to acid stress (ph4.5 and 5.5) and then transferred back to neutral water were investigated. survival rate and haemolymph [cl(-)] and [na(+)] were assessed after 24, 48 and 72h of exposure in acidic streams and after a recovery period of 12, 24, 36, 48 and 60h. after 24h, exposure to slightly acidic (ph5.5) and strongly acidic water (ph4.5) led to a severe and significant depletion in haemolymph [na(+)] ...200616678237
the discriminatory power of two biomonitors of trace metal bioavailabilities in freshwater streams.the relative discriminatory powers of two trace metal biomonitors in european streams (the amphipod crustacean gammarus fossarum and mayfly larvae of the genus baetis-b. rhodani and b. vernus) are compared by discriminant function analysis using data from streams draining a zinc and lead mining area of upper silesia, poland. the mayfly larvae (whether or not distinguished into the two separate species) had the better discriminatory power to distinguish between sites on the basis of local bioavai ...200616620902
bisphenol a in artificial indoor streams: ii. stress response and gonad histology in gammarus fossarum (amphipoda).the effects of the world wide-distributed chemical bisphenol a (bpa) on the endocrine system of vertebrates have been demonstrated in several studies. here, we report on the impact of bpa (0, 5, 50 and 500 microg/l nominally, deduced effective concentrations 0, 0.24, 2.4, and 24.1 microg/l, respectively, all at 15 degrees c) on the 70 kd stress protein family (hsp70), the 90 kd stress protein family (hsp90), and gonad histology of the crustacean gammarus fossarum exposed in artificial indoor str ...200616374667
freezing or supercooling: how does an aquatic subterranean crustacean survive exposures at subzero temperatures?crystallization temperature (t(c)), resistance to inoculative freezing (if), ice contents, bound water, protein and glycogen body contents were measured in the aquatic subterranean crustacean niphargus rhenorhodanensis and in the morphologically close surface-dwelling aquatic crustacean gammarus fossarum, both acclimated at 12 degrees c, 3 degrees c and -2 degrees c. cold acclimation induced an increase in the t(c) values in both species but no survival was observed after thawing. however, after ...200616916982
short-term physiological responses to a severe acid stress in three macroinvertebrate species: a comparative study.the present study focuses on the sensitivity among freshwater invertebrate species to acidic stress. three common macroinvertebrate species in the vosges mountains (north-eastern france), gammarus fossarum (amphipoda), hydropsyche pellucidula (trichoptera) and dinocras cephalotes (plecoptera) were exposed for 24, 72 and 120 h to natural acidified water (ph=4.73+/-0.08, [ca2+]=39.1+/-0.6 micromol l(-1), [al(tot)]=28.4+/-1 micromol l(-1)). short-term exposure to acid stress caused significant decr ...200616303164
population structure and dynamics of gammarus fossarum (amphipoda) upstream and downstream from effluents of sewage treatment plants.two streams in germany (körsch and lockwitzbach), each with two sampling sites above and below a sewage treatment plant (stp) discharging effluent, were investigated. sampling sites were characterized, and exposure monitoring for chemicals with known or assumed endocrine disrupting potential was carried out. both the population structure and the population dynamics of gammarus fossarum were examined. the physicochemical parameters measured at the sampling sites of the lockwitzbach and körsch str ...200616222458
bioconcentration, biomagnification and metabolism of 14c-terbutryn and 14c-benzo[a]pyrene in gammarus fossarum and asellus aquaticus.the contribution of bioconcentration and biomagnification of 14c-terbutryn and 14c-benzo[a]pyrene via food and water to the bioaccumulation in gammarus fossarum and asellus aquaticus was investigated in single species-tests. in this investigation the uptake of 14c-terbutryn and 14c-benzo[a]pyrene via food and water by g. fossarum (l.) and a. aquaticus (l.) was examined. bioconcentration factors (bcfs) and biomagnification factors (bmfs) were determined. calculated bcfs were clearly higher than b ...200716997349
sex steroid receptor evolution and signalling in aquatic invertebrates.in vertebrate reproductive endocrinology sex steroids play a pivotal role via binding to receptors. however, information on the origin and relevance of sex steroids in invertebrates is limited. this review highlights current literature on steroid receptors in aquatic invertebrates and reports on some new findings. it has been shown that invertebrates of the deuterostome clade, such as acrania and echinodermata, respond to estrogens and androgens and, at least in branchiostoma, an estrogen recept ...200717219085
cellular and stress protein responses to the uv filter 3-benzylidene camphor in the amphipod crustacean gammarus fossarum (koch 1835).chemical ultraviolet (uv) filters are used in various products and could be released into the environment, for example, via sunscreens used at swimming lakes. uv filters have been found in surface waters in the past but only a few investigations have concentrated on the effects of these substances in the environment. this study investigates the effects of a uv filter in the amphipod gammarus fossarum at the cellular and molecular level. stress protein (hsp70) responses and reactions of hepatopan ...200817985174
acetylcholinesterase activity in gammarus fossarum (crustacea amphipoda) intrinsic variability, reference levels, and a reliable tool for field surveys.the appropriate use of an enzyme activity as a biomarker requires good knowledge of its basal level and its natural variability related to intrinsic biotic and environmental abiotic factors. in view of using whole-body acetylcholinesterase (ache) activity in gammarus fossarum as a reliable biomarker of exposure to anti-cholinesterase agents in aquatic ecosystems, (i) the effects of the main biotic (sex, reproductive status, and weight) and abiotic (water temperature) factors on the basal activit ...200919487036
antibiotics as a chemical stressor affecting an aquatic decomposer-detritivore system.recent evidence indicates that a variety of antibiotic residues may affect the integrity of streams located downstream from wastewater treatment plants. aquatic communities comprising bacterial and fungal decomposers and invertebrate detritivores (shredders) play an important role in the decomposition of allochthonous leaf litter, which acts as a primary energy source for small running waters. the aim of the present study was to assess whether an antibiotic mixture consisting of sulfamethoxazole ...200918717623
effects of metals on feeding rate and digestive enzymes in gammarus fossarum: an in situ experiment.the feeding activity and afterward the assimilation of the products resulting of the food digestion, allow organisms to obtain energy useful for growth, maintenance and reproduction. these biological parameters may be studied to assess the impact of contaminants on the energy metabolism of organisms, which could induce potential effects at an individual level. the studied species was an amphipod gammarus fossarum, which has a high ecological relevance since it is widespread in european streams a ...200919846201
isolation and characterization of the first eight microsatellite loci in gammarus fossarum (crustacea, amphipoda) and cross-amplification in gammarus pulex and gammarus orinos.we characterized the first microsatellite markers for gammarus fossarum. eight loci gave satisfactory amplification patterns in two stream populations (southern france) with number of alleles ranging from 2 to 10 and expected heterozygosity from 0.076 to 0.857. we performed cross-amplification in two closely related gammarid species, gammarus pulex and gammarus orinos. among the eight tested microsatellite loci, four correctly amplified in g. pulex and three in g. orinos.200921564925
acetylcholinesterase activity in gammarus fossarum (crustacea amphipoda): linking ache inhibition and behavioural alteration.relations between whole-body acetylcholinesterase (ache) inhibition and changes in feeding and locomotor behaviours were investigated in adult male gammarus fossarum during short-term exposure (96h) to the organophosphorous pesticide chlorpyrifos (cpe) and the carbamate pesticide methomyl (mt). ache activity was measured after 24, 48 and 96h of exposure. the feeding rate was assessed after 48 and 96h of exposure and locomotor activity was measured at the end of the experiment. a concentration-de ...200919608286
effects of exposing two non-target crustacean species, asellus aquaticus l., and gammarus fossarum koch., to atrazine and imidacloprid.the physiological responses of two freshwater crustaceans, asellus aquaticus l. and gammarus fossarum koch., following in vitro exposure to two pesticides were measured. both species responded to short-term exposure with elevated levels of respiration and/or lower levels of electron transport system (ets) activity. 1 h exposure to concentrations of up to 10 mg l(-1) showed an effect in both test species. laboratory tests confirmed that g. fossarum is more sensitive to short-term pesticide exposu ...201019795091
a new method for early assessment of effects of exposing two non-target crustacean species, asellus aquaticus and gammarus fossarum, to pesticides, a laboratory study.a reliable method is needed for assessing the condition of aquatic animals and their resistance to toxic pollutants. the physiological responses of two freshwater crustaceans, asellus aquaticus and gammarus fossarum, following in vitro exposure to two pesticides (atrazine and imidacloprid), were measured by a combination of electron transport system (ets) activity and respiration (r). short-term exposure concentrations were selected according to standard toxicity tests and ranged from 0.01 mg l( ...201020203137
subcellular compartmentalization of cadmium, nickel, and lead in gammarus fossarum: comparison of methods.knowledge of the subcellular behavior of toxicants, mainly metals, in living organisms is fundamental for understanding their toxicological consequences at individual and trans-generation levels and throughout the food web. however, different partitioning methodologies are available in the literature, particularly concerning the cytosolic fraction. different cytosolic compounds, metallothionein-like proteins (mtlps), and non-metallothionein-like proteins (non-mtlps) could be separated by size ex ...201020045171
permanent genetic resources added to molecular ecology resources database 1 august 2009-30 september 2009.this article documents the addition of 238 microsatellite marker loci and 72 pairs of single nucleotide polymorphism (snp) sequencing primers to the molecular ecology resources database. loci were developed for the following species: adelges tsugae, artemisia tridentata, astroides calycularis, azorella selago, botryllus schlosseri, botrylloides violaceus, cardiocrinum cordatum var. glehnii, campylopterus curvipennis, colocasia esculenta, cynomys ludovicianus, cynomys leucurus, cynomys gunnisoni, ...201021565018
effects of subchronic fungicide exposure on the energy processing of gammarus fossarum (crustacea; amphipoda).current aquatic environmental risk assessment of plant protection products or biocides does not consider effects on organisms involved in leaf litter breakdown, a fundamental ecosystem process in streams. therefore, direct ecotoxicological implications of tebuconazole, a frequently used triazole fungicide, on the leaf-shredding amphipod gammarus fossarum, were assessed. while acute toxicity was low (96h-lc(50)=1347 μg/l), feeding rate, a sublethal endpoint, was significantly reduced after seven ...201020709394
mass spectrometry assay as an alternative to the enzyme-linked immunosorbent assay test for biomarker quantitation in ecotoxicology: application to vitellogenin in crustacea (gammarus fossarum).vitellogenin (vg) is a widespread biomarker for measuring exposure to endocrine disruptors. vg quantification is usually done by using the elisa test (enzyme-linked immunosorbent assay). since this test is specific to a target protein, it can rarely be used with other species due to low cross-reactivity across species. therefore alternative analytical methods have to be considered as the development of a specific and sensitive elisa test for each new target is time-consuming and may prove unsucc ...201020591435
genotoxicity assessment in the amphipod gammarus fossarum by use of the alkaline comet assay.many xenobiotics and newly developed substances released in the aquatic environment have been found genotoxic for living organisms. there is interest in developing biomarkers of genotoxicity in different phyla and the need to increase our understanding of the impact of genotoxic insult on invertebrates, particularly on crustaceans. freshwater invertebrates and particularly amphipods are highly relevant species ecologically. however, genotoxic responses of such species are rarely studied, whereas ...201020451657
high sensitivity of gammarus sp. juveniles to deltamethrin: outcomes for risk assessment.amphipods from the genus gammarus are among the most frequently used organisms in ecotoxicological testing and in situ bioindication. because of their importance in risk assessment, it is necessary to understand the potential roles of life stage, population source and inter-specific differences on the sensitivity of these organisms to contaminants. in the present study, the acute toxicity of deltamethrin, a commonly used pyrethroid insecticide, has been tested for gammarus fossarum and gammarus ...201020236703
ovarian cycle and embryonic development in gammarus fossarum: application for reproductive toxicity assessment.among freshwater invertebrates, gammarus fossarum is an important test organism and is currently used in ecotoxicology for acute and chronic assays; nevertheless, reproductive toxicity test methods are not yet available for these species. in the present study, the reproductive cycle in gammarus fossarum was characterized in order to propose a reproductive toxicity test encompassing molting, follicle growth, and embryonic development that will provide a better understanding of the mode of action ...201020872689
cellular and molecular osmoregulatory responses to cadmium exposure in gammarus fossarum (crustacea, amphipoda).osmoregulation represents a reliable indicator of the physiological state of crustaceans. it is mainly effected in gills via na(+)/k(+)-atpase (nka) providing the major driving force for ion transport. in the present study conducted in the freshwater amphipod gammarus fossarum, the impact of an exposure to 15 μg cd l(-1) for 3 and 7d was investigated on the haemolymph osmolality (ho), gill structure, nka localization in gills and its relative expression. in cd-exposed g. fossarum, mean ho signif ...201020843535
positive effects of wastewater ozonation displayed by in situ bioassays in the receiving stream.tertiary treatment methods, like ozonation, are currently under discussion to improve removal efficiencies of micropollutants by municipal wastewater treatment plants (wwtps). in order to assess the effects of a full-scale wastewater ozonation at wwtp wüeri, switzerland, on the receiving stream, a total of seven in situ bioassays with gammarus fossarum that lasted 7-days were conducted during an overall period of 33 months. caged gammarids were exposed between 150 m up- and 400 m downstream of ...201121361319
population response to ozone application in wastewater: an on-site microcosm study with gammarus fossarum (crustacea: amphipoda).we assessed possible ecotoxicological implications of ozone application to secondary treated wastewater from a municipal wastewater treatment plant on gammarus fossarum, an aquatic leaf shredding amphipod. our 10-week study exposed g. fossarum populations to ozone-treated, non-ozone treated wastewater, or tap water in replicated outdoor flow-through stream microcosms. feeding activity, an indicator for organic matter decomposition, of amphipod populations exposed to ozone treated wastewater was ...201121267649
effects of nano-tio(2) in combination with ambient uv-irradiation on a leaf shredding amphipod.production and use of engineered nanoparticles, such as titanium dioxide nanoparticles (ntio(2)), is increasing worldwide, enhancing their probability to enter aquatic environments. however, direct effects of ntio(2) as well as ecotoxicological consequences due to the interactions of ntio(2) with environmental factors like ultraviolet (uv) irradiation on representatives of detrital food webs have not been assessed so far. hence, the present study displayed for the first time adverse sublethal ef ...201121868053
vitellogenin-like gene expression in freshwater amphipod gammarus fossarum (koch, 1835): functional characterization in females and potential for use as an endocrine disruption biomarker in males.the induction of vitellogenin (vtg) synthesis is widely accepted as a biomarker of estrogenic exposure in male and juvenile fish. vtg synthesis has emerged as an interesting endpoint to assess endocrine disruptor (ed) effects in crustaceans. however, studies reporting induction of vtg in male crustaceans are lacking. this study investigated the expression of the vtg gene in a freshwater amphipod, gammarus fossarum, using calibrated real-time reverse transcription polymerase chain reaction (real- ...201121701845
ecotoxicologial evaluation of wastewater ozonation based on detritus-detritivore interactions.advanced oxidation technologies such as ozonation have been proposed to improve removal efficiency of micropollutants during wastewater treatment. in a meta-analysis of peer-reviewed literature, we found no ecotoxicological effects of wastewater ozonation on invertebrates (n=82), but significant adverse effects on bacteria (n=24) and fish (n=5). as information on functional endpoints or trophic interactions is lacking, we applied a bioassay relating to leaf litter decomposition to fill this gap. ...201121044796
the functional and physiological status of gammarus fossarum (crustacea; amphipoda) exposed to secondary treated wastewater.climate change scenarios predict lower flow rates during summer that may lead to higher proportions of wastewater in small and medium sized streams. moreover, micropollutants (e.g. pharmaceuticals and other contaminants) continuously enter aquatic environments via treated wastewater. however, there is a paucity of knowledge, whether extended exposure to secondary treated wastewater disrupts important ecosystem functions, e.g. leaf breakdown. therefore, the amphipod shredder gammarus fossarum was ...201120932616
in situ feeding assay with gammarus fossarum (crustacea): modelling the influence of confounding factors to improve water quality biomonitoring.in situ feeding assays implemented with transplanted crustacean gammarids have been claimed as promising tools for the diagnostic assessment of water quality. nevertheless the implementation of such methodologies in biomonitoring programs is still limited. this is explained by the necessity to improve the reliability of these bioassays. the present study illustrates how modelling the influence of confounding factors could allow to improve the interpretation of in situ feeding assay with gammarus ...201122014562
ecotoxicological impact of the fungicide tebuconazole on an aquatic decomposer-detritivore system.leaf litter breakdown is a fundamental process in aquatic ecosystems that is realized by microbial decomposers and invertebrate detritivores. although this process may be adversely affected by fungicides, among other factors, no test design exists to assess combined effects on such decomposer-detritivore systems. hence, the present study assessed effects of the model fungicide tebuconazole (65 µg/l) on the conditioning of leaf material (by characterizing the associated microbial community) as we ...201121919044
spatial distribution of cryptic species diversity in european freshwater amphipods (gammarus fossarum) as revealed by pyrosequencing.in order to understand and protect ecosystems, local gene pools need to be evaluated with respect to their uniqueness. cryptic species present a challenge in this context because their presence, if unrecognized, may lead to serious misjudgement of the distribution of evolutionarily distinct genetic entities. in this study, we describe the current geographical distribution of cryptic species of the ecologically important stream amphipod gammarus fossarum (types a, b and c). we use a novel pyroseq ...201121909373
ecotoxicological evaluation of three tertiary wastewater treatment techniques via meta-analysis and feeding bioassays using gammarus fossarum.advanced treatment techniques, like ozone, activated carbon and tio(2) in combination with uv, are proposed to improve removal efficiency of micropollutants during wastewater treatment. in a meta-analysis of peer-reviewed literature, we found significantly reduced overall ecotoxicity of municipal wastewaters treated with either ozone (n=667) or activated carbon (=113), while tio(2) and uv was not yet assessed. as comparative investigations regarding the detoxification potential of these advanced ...201121689882
linking genotoxic responses in gammarus fossarum germ cells with reproduction impairment, using the comet assay.germ cells perform a unique and critical biological function: they pass down dna that will be used for the development of the next generation. thus there is an increasing need to understand how the adult exposure to genotoxicants could show negative impact on the offspring of aquatic organisms. hence this work addresses the question of the consequences of germ cell dna damage resulting from parental exposure on reproduction quality in the freshwater crustacean gammarus fossarum, a high ecologica ...201121489518
dna damage in caged gammarus fossarum amphipods: a tool for freshwater genotoxicity assessment.the aim of this study was to propose a tool for freshwater environmental genotoxicity assessment using gammarus fossarum, a high ecologically relevant species. in a first part, gammarids were caged upstream and downstream wastewater treatment plant effluent output. the sensitivity of genotoxic responses of haemocytes, oocytes and spermatozoa was compared using the comet assay. spermatozoa appeared to be the most sensitive, suitable and relevant cell type for genotoxicity risk assessment. in a se ...201121421282
are cryptic host species also cryptic to parasites? host specificity and geographical distribution of acanthocephalan parasites infecting freshwater gammarus.many parasites infect multiple host species. in coevolving host-parasite interactions, theory predicts that parasites should be adapted to locally common hosts, which could lead to regional shifts in host preferences. we studied the interaction between freshwater gammarus (crustacea, amphipoda) and their acanthocephalan parasites using a large-scale field survey and experiments, combined with molecular identification of cryptic host and parasite species. gammarus pulex is a common host for multi ...201121470578
ozonation of secondary treated wastewater reduces ecotoxicity to gammarus fossarum (crustacea; amphipoda): are loads of (micro)pollutants responsible?ozone application is an effective tool to reduce loads of (micro)pollutants in wastewater, however, its ecotoxicological implications are largely unknown. therefore, the feeding rates of a leaf-shredding invertebrate (gammarus fossarum) exposed to secondary (=non-ozone) or ozone treated wastewater were investigated to assess potential ecotoxicological effects. two repetitive experiments resulted in significantly higher feeding rates for gammarids exposed to ozone compared to non-ozone treated wa ...201121636106
dna damage in gammarus fossarum sperm as a biomarker of genotoxic pressure: intrinsic variability and reference level.in the perspective of a biomonitoring application for assessing genotoxicity of freshwater ecosystems, the comet assay has recently been developed on spermatozoa in the amphipod gammarus fossarum, in order to propose a sensitive and reliable genotoxicity biomarker in an ecologically relevant freshwater species. the appropriate use of a genotoxicity biomarker requires good knowledge of its basal level and its natural variability related to intrinsic biotic and environmental abiotic factors. we pr ...201121621819
fungal composition on leaves explains pollutant-mediated indirect effects on amphipod feeding.the energy stored in coarse particulate organic matter, e.g. leaf litter, is released to aquatic ecosystems by breakdown processes involving microorganisms and leaf shredding invertebrates. the palatability of leaves and thus the feeding of shredders on leaf material are highly influenced by microorganisms. however, implications in the colonization of leaves by microorganisms (=conditioning) caused by chemical stressors are rarely studied. our laboratory experiments, therefore, investigated for ...201121536010
a comparison of the short-term toxicity of cadmium to indigenous and alien gammarid species.amphipods play an important role in many aquatic ecosystems and are commonly used in ecotoxicology and ecosystem health assessment. several alien gammarids have been introduced in many regions of the world during the last decades. in this study, we investigated if differences in cadmium sensitivity occurred between (1) different species belonging to the family gammaridae and (2) different populations of the same species originating from a polluted or a non-polluted site. the acute cadmium toxici ...201222354564
differences in the sensitivity among cryptic lineages of the gammarus fossarum complex.lineages that are at least superficially morphologically identical but genetically distinct are usually misclassified as a single nominal species and, hence, belong to a cryptic species complex, as for example observed for gammarus fossarum. since genetic differentiation between cryptic lineages of the g. fossarum complex is comparable to an interspecific level, deviations in physiological and behavioral characteristics are conceivable. the present study investigates for the first time deviation ...201223063922
vitellogenin-like protein measurement in caged gammarus fossarum males as a biomarker of endocrine disruptor exposure: inconclusive experience.a vitellogenin (vg) mass spectrometry-based assay was recently developed to actively biomonitor and assess the exposure of the amphipod gammarus fossarum to endocrine-disrupting chemicals in freshwater hydrosystems. this paper focuses on the appropriate use of this biomarker, which requires good knowledge of its basal level in males and its natural variability related to intrinsic biotic and environmental abiotic factors. to obtain the lowest biomarker variability, we first studied some of these ...201222710022
thiacloprid affects trophic interaction between gammarids and mayflies.neonicotinoid insecticides like thiacloprid enter agricultural surface waters, where they may affect predator-prey-interactions, which are of central importance for ecosystems as well as the functions these systems provide. the effects of field relevant thiacloprid concentrations on the leaf consumption of gammarus fossarum (amphipoda) were assessed over 96 h (n = 13-17) in conjunction with its predation on baetis rhodani (ephemeroptera) nymphs. the predation by gammarus increased significantly ...201222522317
coupling geochemical and biological approaches to assess the availability of cadmium in freshwater sediment.sediments are considered as a sink for metals, and the assessment of metal bioavailability for benthic organisms represents a great challenge. diffusive gradient in thin films (dgt), developed to measure labile metals in aquatic media, have more recently been applied to sediment. nevertheless, few studies have determined the relation between measurements from dgt and bioaccumulation in different benthic organisms. the aim of our work was to determine if labile metal measured by dgt in sediment i ...201222446110
vitellogenin-like proteins in the freshwater amphipod gammarus fossarum (koch, 1835): functional characterization throughout reproductive process, potential for use as an indicator of oocyte quality and endocrine disruption biomarker in males.this work focused on the validation of biological specificity of the quantitative lc-ms/ms assay by checking the natural variability of vg levels during the reproductive cycle in gammarus fossarum (i.e., including oogenesis and embryogenesis). laboratory tests were performed for 21 days under controlled conditions to assess vg changes in male and female gammarids after exposure to chemical stress. females were exposed to two crustacean hormones, 20-hydroxyecdysone (0.01, 1 and 100 μg l⁻¹) and me ...201222387877
hidden biodiversity in an ecologically important freshwater amphipod: differences in genetic structure between two cryptic species.cryptic species, i.e. species that are morphologically hard to distinguish, have been detected repeatedly in various taxa and ecosystems. in order to evaluate the importance of this finding, we have to know in how far cryptic species differ in various aspects of their biology. the amphipod gammarus fossarum is a key invertebrate in freshwater streams and contains several cryptic species. we examined the population genetic structure, genetic diversity and demographic history of two of them (type ...201323967060
behavioural and physiological responses of gammarus fossarum (crustacea amphipoda) exposed to silver.the study aims at investigating the effects of silver (ag), a re-emerging contaminant, on physiological and behavioural responses in gammarus fossarum. in a first experiment, g. fossarum ag lc50s were evaluated during 96 h under semi-static mode of exposure. juveniles appeared to be more sensitive to ag (lc5096h: 1.01 μg l(-1)) than ovigerous females (lc5096h: 1.9 μg l(-1)) and adult males (lc5096h: 2.2 μg l(-1)). in a second experiment, the physiological (osmo-/ionoregulation; antioxidant enzym ...201323962677
temporal patterns of digestive enzyme activities and feeding rate in gammarids (gammarus fossarum) exposed to inland polluted waters.the aim of this study was to use digestive enzyme activities in gammarus fossarum as biomarkers during active biomonitoring. standardised gammarids were transplanted for 7 days to five sites in the riou mort watershed contaminated by polymetallic pollution. this experiment was conducted on seven different dates from february 2009 to june 2010. feeding rates were tracked, along with amylase, cellulase and trypsin activities. we found that feeding rate and digestive capacity were reduced in the mo ...201323932430
effects of peak exposure scenarios on gammarus fossarum using field relevant pesticide mixtures.the present study investigated sublethal effects of a field relevant pesticide mixture (one herbicide, three fungicides, five insecticides) on gammarus fossarum by considering different peak exposure scenarios, which may be generated by the inherent properties of vegetated ditches. additional experiments aimed at the identification of germane exposure pathways (food and water). therefore, g. fossarum were exposed in independent experiments to three scenarios, which differed besides in the peak c ...201323790476
effect of water quality and confounding factors on digestive enzyme activities in gammarus fossarum.the feeding activity and subsequent assimilation of the products resulting from food digestion allow organisms to obtain energy for growth, maintenance and reproduction. among these biological parameters, we studied digestive enzymes (amylase, cellulase and trypsin) in gammarus fossarum to assess the impact of contaminants on their access to energy resources. however, to enable objective assessment of a toxic effect of decreased water quality on an organisms' digestive capacity, it is necessary ...201323784059
effects of municipal wastewater on aquatic ecosystem structure and function in the receiving stream.during recent years, increasing incidences of summer droughts - likely driven by climate change - reduced the dilution potential of low-order streams for secondary treated wastewater also in temperate europe. despite the potential risks to ecosystem integrity, there is a paucity of knowledge regarding the effects of different wastewater dilution potentials on ecosystem functions. the present study investigated the implications of secondary treated wastewater released into a third-order stream (q ...201323562693
phosphorus availability modulates the toxic effect of silver on aquatic fungi and leaf litter decomposition.the functioning of forested headwater streams is intimately linked to the decomposition of leaf litter by decomposers, mainly aquatic hyphomycetes, which enables the transfer of allochthonous carbon to higher trophic levels. evaluation of this process is being increasingly used as an indicator of ecosystem health and ecological integrity. yet, even though the individual impacts of contaminants and nutrient availability on decomposition have been well studied, the understanding of their combined ...201324184839
caged gammarus fossarum (crustacea) as a robust tool for the characterization of bioavailable contamination levels in continental waters: towards the determination of threshold values.we investigated the suitability of an active biomonitoring approach, using the ecologically relevant species gammarus fossarum, to assess trends of bioavailable contamination in continental waters. gammarids were translocated into cages at 27 sites, in the rhône-alpes region (france) during early autumn 2009. study sites were chosen to represent different physico-chemical characteristics and various anthropic pressures. biotic factors such as sex, weight and food availability were controlled in ...201323182666
influence of the cestode ligula intestinalis and the acanthocephalan polymorphus minutus on levels of heat shock proteins (hsp70) and metallothioneins in their fish and crustacean intermediate hosts.it is a common method to analyse physiological mechanisms of organisms - commonly referred to as biomarkers - to indicate the presence of environmental pollutants. however, as biomarkers respond to a wide range of stressors we want to direct the attention on natural stressors, i.e. on parasites. after two years maintenance under controlled conditions, roach (rutilus rutilus) revealed no influence on levels of metallothionein by the parasite ligula intestinalis. the same was found for gammarus fo ...201323770459
size-, surface- and crystalline structure composition-related effects of titanium dioxide nanoparticles during their aquatic life cycle.nanoparticle toxicity depends amongst others on particle characteristics and nanoparticle behavior during their aquatic life cycle. aquatic organisms may be exposed to nanoparticle agglomerates of varying size, while lager agglomerates after settling rather affect benthic organisms. in this context, the present study systematically examined the role of particle characteristics, i.e. crystalline structure composition (anatase as well as mixture of anatase-rutile), initial particle size (55-, 100- ...201425010941
proteogenomics of gammarus fossarum to document the reproductive system of amphipods.because of their ecological importance, amphipod crustacea are employed worldwide as test species in environmental risk assessment. although proteomics allows new insights into the molecular mechanisms related to the stress response, such investigations are rare for these organisms because of the lack of comprehensive protein sequence databases. here, we propose a proteogenomic approach for identifying specific proteins of the freshwater amphipod gammarus fossarum, a keystone species in european ...201425293947
multi-residue analysis of emerging pollutants in benthic invertebrates by modified micro-quick-easy-cheap-efficient-rugged-safe extraction and nanoliquid chromatography-nanospray-tandem mass spectrometry analysis.aquatic ecosystems are continuously contaminated by agricultural and industrial sources. although the consequences of this pollution are gradually becoming visible, their potential impacts on aquatic ecosystems are poorly known, particularly regarding the risk of bioaccumulation in different trophic levels. to establish a causality relationship between bioaccumulation and disease, experiments on biotic matrices must be performed. in this context, a multi-residue method for the analysis of 35 eme ...201425287267
ecological modeling for the extrapolation of ecotoxicological effects measured during in situ assays in gammarus.evaluating the effects of chemical contamination on populations and ecological communities still constitutes a challenging necessity in environmental management. however, the toxic effects of contaminants are commonly measured by means of organism-level responses. linking such effects measures with ecological models is a promising way to determine population-level impacts. in this way, population models are currently increasingly used in predictive risk assessment procedures, but their use in en ...201424805228
influence of molting and starvation on digestive enzyme activities and energy storage in gammarus fossarum.among the many biological responses studied in ecotoxicology, energy-based biomarkers such as digestive enzyme activities and energy reserves appear to be useful predictive tools for detecting physiological disturbances in organisms. however, the use of these biological responses as biomarkers could be limited by the effects of confounding factors (biotic and abiotic) and physiological processes, such as the reproductive cycle. thus, the optimal use of these biomarkers will be facilitated by und ...201424788197
importance of toxicokinetics for interspecies variation in sensitivity to chemicals.interspecies variation in sensitivity to synthetic chemicals can be orders of magnitude large. species traits causing the variation can be related to toxicokinetics (uptake, distribution, biotransformation, elimination) or toxicodynamics (interaction with biological target sites). we present an approach to systematically measure and model the contribution of uptake, biotransformation, internal distribution, and elimination kinetics toward species sensitivity differences. the aim is to express se ...201424758734
effects of current-use fungicides and their mixtures on the feeding and survival of the key shredder gammarus fossarum.fungicides are frequently applied in agriculture and are subsequently detected in surface waters in total concentrations of up to several tens of micrograms per liter. these concentrations imply potential effects on aquatic communities and fundamental ecosystem functions such as leaf litter breakdown. in this context, the present study investigates sublethal and lethal effects of organic (azoxystrobin, carbendazim, cyprodinil, quinoxyfen, and tebuconazole) and inorganic (three copper (cu)-based ...201424674876
combined effect of uv-irradiation and tio₂-nanoparticles on the predator-prey interaction of gammarids and mayfly nymphs.although nanoparticle production and application increases continuously, their implications in species interactions, especially in combination with other environmental stressors, are rarely assessed. therefore, the present study investigated the influence of 2 mg/l titanium dioxide nanoparticles (ntio2; <100 nm) on the interaction between the prey ephemerella ignita (ephemeroptera) and the predator gammarus fossarum (amphipoda) over 96 h considering uv-irradiation at field relevant levels (appro ...201424370671
multidimensionality in host manipulation mimicked by serotonin injection.manipulative parasites often alter the phenotype of their hosts along multiple dimensions. 'multidimensionality' in host manipulation could consist in the simultaneous alteration of several physiological pathways independently of one another, or proceed from the disruption of some key physiological parameter, followed by a cascade of effects. we compared multidimensionality in 'host manipulation' between two closely related amphipods, gammarus fossarum and gammarus pulex, naturally and experimen ...201425339729
identifying a key host in an acanthocephalan-amphipod system.trophically transmitted parasites may use multiple intermediate hosts, some of which may be 'key-hosts', i.e. contributing significantly more to the completion of the parasite life cycle, while others may be 'sink hosts' with a poor contribution to parasite transmission. gammarus fossarum and gammarus roeseli are sympatric crustaceans used as intermediate hosts by the acanthocephalan pomphorhynchus laevis. gammarus roeseli suffers higher field prevalence and is less sensitive to parasite behavio ...201526303006
the relative importance of diet-related and waterborne effects of copper for a leaf-shredding invertebrate.copper (cu) exposure can increase leaf-associated fungal biomass, an important food component for leaf-shredding macroinvertebrates. to test if this positive nutritional effect supports the physiological fitness of these animals and to assess its importance compared to waterborne toxicity, we performed a 24-day-bioassay in combination with a 2×2 factorial design using the amphipod shredder gammarus fossarum and a field-relevant cu concentration of 25 μg/l (n = 65). waterborne toxicity was neglig ...201526000755
consequences of lower food intake on the digestive enzymes activities, the energy reserves and the reproductive outcome in gammarus fossarum.digestive enzyme activity is often used as a sensitive response to environmental pollution. however, only little is known about the negative effects of stress on digestive capacities and their consequences on energy reserves and reproduction, although these parameters are important for the maintenance of populations. to highlight if changes in biochemical responses (digestive enzymes and reserves) led to impairments at an individual level (fertility), gammarus fossarum were submitted to a lower ...201525880985
copper sulphate reduces the metabolic activity of gammarus fossarum in laboratory and field experiments.the specialised fauna of freshwater springs is affected by contamination of the water with xenobiotics from human activities in the surrounding landscape. we assessed the effects of exposure to toxins in laboratory and field experiments by using copper sulphate as a model substance and gammarus fossarum koch, 1836, as the model organism. this amphipod is a common representative of the european spring fauna and copper is a widespread contaminant, mainly from agricultural practice. the experiments ...201525704832
linking feeding inhibition with reproductive impairment in gammarus confirms the ecological relevance of feeding assays in environmental monitoring.the in situ feeding bioassay in gammarus fossarum is recognized as a reliable tool for monitoring the toxicity of freshwater contamination. however, whether recorded feeding inhibitions can potentially provoke population-level adverse outcomes remains an open question. in the present study, the authors present an experimental study in g. fossarum, which contributes to the quantitative description of the links between feeding inhibitions and impacts on female reproductive performance. the authors ...201525639673
data for comparative proteomics of ovaries from five non-model, crustacean amphipods.ovaries were taken from five sexually mature amphipods: gammarus fossarum, gammarus pulex, gammarus roeseli, hyallela azteca and parhyale hawaiensis. the soluble proteome extracted from individual pair of ovaries from five biological replicates was trypsin digested and the resulting peptides were analyzed by high resolution tandem mass spectrometry. the spectra were assigned with four protein sequence databases with different specificities: a rnaseq-derived g. fossarum database; a rnaseq-derived ...201526380837
the southwestern carpathians as an ancient centre of diversity of freshwater gammarid amphipods: insights from the gammarus fossarum species complex.gammarus fossarum is a diverse species complex of epigean freshwater amphipods throughout europe. due to their poor dispersal capabilities and ubiquity, these crustaceans may serve as a model for investigating the influence of historical factors on the contemporary distribution and diversity patterns of freshwater macrozoobenthos. here, we investigate the fine-scale phylogeographic structure of this complex across its range in the southwestern carpathian mountains, which comprises two areas that ...201526096651
does the presence of titanium dioxide nanoparticles reduce copper toxicity? a factorial approach with the benthic amphipod gammarus fossarum.in aquatic ecosystems, titanium dioxide nanoparticles (nano-tio2) may adsorb co-occurring chemical stressors, such as copper (cu). this interaction has the potential to reduce the concentration of dissolved cu due to surface binding to the nanoparticles. the subsequent sedimentation of nano-tio2 agglomerates may increase the exposure of benthic species towards the associated cu. this scenario was assessed by employing the amphipod gammarus fossarum as model species and taking advantage of a 2×2- ...201526037100
photocatalytic properties of titanium dioxide nanoparticles affect habitat selection of and food quality for a key species in the leaf litter decomposition process.interactions with environmental parameters may alter the ecotoxicity of nanoparticles. the present study therefore assessed the (in)direct effects of nanoparticulate titanium dioxide (nano-tio(2)) towards gammarus fossarum, considering nano-tio(2)'s photocatalytic properties at ambient uv-intensities. gammarids' habitat selection was investigated using its feeding preference on leaf discs either exposed to or protected from uv-irradiation in presence of nano-tio(2) as proxy (n = 49). uv-irradiat ...201525463723
evolution of cadmium tolerance and associated costs in a gammarus fossarum population inhabiting a low-level contaminated stream.deciphering evolutionary processes occurring within long-term contaminated wild populations is essential for the ecological risk assessment of persistent chemical contaminations. using field populations of gammarus, a commonly-used genus in aquatic ecotoxicology, the present study sought to gain insights into the extent to which long-term exposure to metals in the field could effectively lead to shifts in toxicological sensitivities. for this, we identified a gammarus population inhabiting a str ...201526003835
waterborne toxicity and diet-related effects of fungicides in the key leaf shredder gammarus fossarum (crustacea: amphipoda).animals involved in leaf litter breakdown (i.e., shredders) play a central role in detritus-based stream food webs, while their fitness and functioning can be impaired by anthropogenic stressors. particularly fungicides can affect shredders via both waterborne exposure and their diet, namely due to co-ingestion of adsorbed fungicides and shifts in the leaf-associated fungal community, on which shredders' nutrition heavily relies. to understand the relevance of these effect pathways, we used a fu ...201526520670
seasonal variability and inter-species comparison of metal bioaccumulation in caged gammarids under urban diffuse contamination gradient: implications for biomonitoring investigations.although caging of gammarus species offers promising lines of inquiry to monitor metal bioavailability in freshwaters, the interspecies responsiveness to metal exposures is still unclear. in addition, abiotic factors inherent to transplantation can hamper the interpretation of field bioaccumulation data. to assess the relevance of using gammarids as biomonitors, we investigated the seasonal influence on metal bioaccumulation in two common species, gammarus pulex and gammarus fossarum. during fou ...201525577736
does the current fungicide risk assessment provide sufficient protection for key drivers in aquatic ecosystem functioning?the level of protection provided by the present environmental risk assessment (era) of fungicides in the european union for fungi is unknown. therefore, we assessed the structural and functional implications of five fungicides with different modes of action (azoxystrobin, carbendazim, cyprodinil, quinoxyfen, and tebuconazole) individually and in mixture on communities of aquatic hyphomycetes. this is a polyphyletic group of fungi containing key drivers in the breakdown of leaf litter, governing ...201525517729
effects of increased temperatures on gammarus fossarum under the influence of copper sulphate.the specialised fauna of freshwater springs will have to cope with a possible temperature rise owing to global change. it is affected additionally by contamination of the water with xenobiotics from human activities in the surrounding landscape. we assessed the combined effects of temperature increase and exposure to toxins in laboratory experiments by using copper sulphate as a model substance and gammarus fossarum koch, 1835, as the model organism. this amphipod is a common representative of t ...201525424351
proteomic investigation of male gammarus fossarum, a freshwater crustacean, in response to endocrine disruptors.while the decrease in human sperm count in response to pollutants is a worldwide concern, little attention is being devoted to its causes and occurrence in the biodiversity of the animal kingdom. arthropoda is the most species-rich phyla, inhabiting all aquatic and terrestrial ecosystems. during evolution, key molecular players of the arthropod endocrine system have diverged from the vertebrate counterparts. consequently, arthropods may have different sensitivities toward endocrine disrupting ch ...201525363278
effects of the acanthocephalan polymorphus minutus and the microsporidian dictyocoela duebenum on energy reserves and stress response of cadmium exposed gammarus fossarum.amphipods are commonly parasitized by acanthocephalans and microsporidians and co-infections are found frequently. both groups of parasites are known to have severe effects on their host. for example, microsporidians can modify host sex ratio and acanthocephalans can manipulate the behavior of the amphipod to promote transmission to the final host. these effects influence host metabolism in general and will also affect the ability of amphipods to cope with additional stressors such as environmen ...201526539331
gammarus fossarum (crustacea, amphipoda) as a model organism to study the effects of silver nanoparticles.amphipods are one of the most important components of freshwater ecosystems. among them, gammarids are the most widespread group in europe and are often used as bioindicators and model organisms in ecotoxicology. however, their use, especially of gammarus fossarum for the study of the environmental impact of nanoparticles, has been rather limited so far. g. fossarum was selected to assess effects of well-characterized chemically synthesized silver nanoparticles (agnps 20nm and 200nm) and "green" ...201627328878
quantification of emerging micropollutants in an amphipod crustacean by nanoliquid chromatography coupled to mass spectrometry using multiple reaction monitoring cubed mode.an innovative analytical method has been developed to quantify the bioaccumulation in an amphipod crustacean (gammarus fossarum) of three micropollutants regarded as anthropic-pollution markers: carbamazepine, oxazepam, and testosterone. a liquid-liquid extraction assisted by salts, known as quechers (quick, easy, cheap, effective, rugged, and safe) was miniaturised and optimised, so it could be adapted to the low mass samples (approximatively 5mg dry weight). for this same reason and in order t ...201627324621
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