| expression and evolution studies of ets genes in a primitive coelomate, the polychaete annelid, hediste (nereis) diversicolor. | the ets family includes numerous proteins with a highly conserved dna-binding domain of 85 amino acids named the ets domain. phylogenetic analyses from ets domains revealed that this family could be divided into 13 groups, among them are ets and erg. the ets genes are present in the metazoan kingdom and we have previously characterized the nd ets and nd erg genes in the polychaete annelid hediste diversicolor. here, we isolated a fragment encoding the ets domain from nd ets, by genomic library s ... | 2002 | 12128055 |
| esterases as biomarkers in nereis (hediste) diversicolor exposed to temephos and bacillus thuringiensis var. israelensis used for mosquito control in coastal wetlands of morbihan (brittany, france). | since 1998, a biomonitoring programme has been implemented to assess the potential impact of chemical mosquito control on macroinvertebrates of the coastal wetlands of morbihan (brittany, france). acetylcholinesterase and carboxylesterases were used as biomarkers to assess the effects of abate 500e (a.i. temephos) and vectobac 12 as (a.i. endotoxins of bacillus thuringiensis var. israelensis, bti) in nereis (hediste) diversicolor. esterase inhibition revealed a marked impact of temephos, suggest ... | 2002 | 12408646 |
| antibacterial properties of hemerythrin of the sand worm nereis diversicolor. | to investigate the immune defense of the annelid nereis diversicolor and the key role of a oxygen-binding protein, the metalloprotein mpii animals were subjected to bacteria infection. | 2003 | 12743530 |
| bacterial extracellular polymeric substance (eps): a carrier of heavy metals in the marine food-chain. | the ecological implications of metal binding properties of bacterial eps and its possible role in the bioaccumulation of pollutants in the marine food-chain was investigated using a partially purified and chemically characterized microbial eps isolated from a species of marinobacter. various factors influencing metal sorption by the eps including the influence of initial metal concentrations, incubation time, ph and sodium chloride concentrations on binding of lead (pb2+) and copper (cu2+) were ... | 2006 | 16256198 |
| the macrobenthic community along a mercury contamination in a temperate estuarine system (ria de aveiro, portugal). | mercury is a widely distributed environmental pollutant and a toxic element to all living organisms. this study represents an attempt to evaluate its correlation with the macrobenthic community structure in a temperate estuarine system, the ria de aveiro (portugal). the macrobenthic community structure showed significant differences along the mercury gradient. overall, the increase of mercury contamination was associated with reduced total abundance, lower species richness, and dominance of tole ... | 2008 | 18765161 |
| different mercury bioaccumulation kinetics by two macrobenthic species: the bivalve scrobicularia plana and the polychaete hediste diversicolor. | mercury is a global priority pollutant and given its huge relevance in terms of environmental damage and a threat to human health, it is important to study the bioaccumulation processes at the level of macrobenthic organisms and evaluate possible consequences for the trophic chain. in this work we evaluate the mercury accumulation rates of two distinct and economically important macrobenthic species, the polychaete hediste diversicolor and the bivalve scrobicularia plana, through a mesocosms lab ... | 2009 | 19395081 |
| evaluation of enzymatic biomarkers and lipoperoxidation level in hediste diversicolor exposed to copper and benzo[a]pyrene. | this study aims to evaluate the effects of exposure to copper, benzo[a]pyrene, and to their mixture on enzymatic and lipid peroxidation biomarkers in hediste diversicolor. worms were submitted to 1 microm of both single compounds and to their mixture during a period of test of 12, 24, 36, and 48 h. the biomarkers selected in this work were the activities of cytochrome p450-dependent nadph cytochrome c reductase (nadph red) as phase i enzyme, glutathione-s-transferase (gst) as phase ii enzyme, an ... | 2009 | 19501399 |
| impact of biodiversity-climate futures on primary production and metabolism in a model benthic estuarine system. | understanding the effects of anthropogenically-driven changes in global temperature, atmospheric carbon dioxide and biodiversity on the functionality of marine ecosystems is crucial for predicting and managing the associated impacts. coastal ecosystems are important sources of carbon (primary production) to shelf waters and play a vital role in global nutrient cycling. these systems are especially vulnerable to the effects of human activities and will be the first areas impacted by rising sea le ... | 2011 | 21320339 |
| smelling danger - alarm cue responses in the polychaete nereis (hediste) diversicolor (müller, 1776) to potential fish predation. | the harbour ragworm, nereis (hediste) diversicolor is a common intertidal marine polychaete that lives in burrows from which it has to partially emerge in order to forage. in doing so, it is exposed to a variety of predators. one way in which predation risk can be minimised is through chemical detection from within the relative safety of the burrows. using cctv and motion capture software, we show that h. diversicolor is able to detect chemical cues associated with the presence of juvenile floun ... | 2013 | 24155953 |
| genotoxic and oxidative responses in coelomocytes of eisenia fetida and hediste diversicolor exposed to lipid-coated cdse/zns quantum dots and cdcl2. | the emerging of quantum dots utilization in industrial or medicinal fields involved a potentially increase of these nanoparticles in environment. in this work, the genotoxic (comet assay) and oxidative effects (sod activity, tbars) of functionalized-qds and cadmium chloride were investigated on hediste diversicolor and eisenia fetida coelomocytes. results demonstrated that functionalized-qds (qdns) and cadmium chloride induced dna damages through different mechanisms that depended on the nano- o ... | 2015 | 24500942 |
| selenium in sediments and biota from estuaries of southwest england. | selenium concentrations have been measured in sediment, fucoid macroalgae and macroinvertebrates from four estuaries of sw england (yealm, plym, looe, fal). sediment concentrations ranged from about 0.4 μg g(-1) in the yealm to 1.49 μg g(-1) at one site in the plym. concentrations in fucus vesiculosus (0.05-0.31 μg g(-1)) and f. ceranoides (0.05-0.51 μg g(-1)) were significantly lower than corresponding concentrations in sediment but there was no correlation between algal and sediment concentrat ... | 2013 | 23773950 |
| biomonitoring of thallium availability in two estuaries of southwest england. | thallium is a highly toxic metal whose biogeochemical behaviour in the marine environment is poorly understood. we measured tl in sediments, macroalgae (fucus vesiculosus and fucus ceranoides) and deposit-feeding invertebrates (hediste diversicolor, arenicola marina and scrobicularia plana) from two estuaries of south west england (plym and fal) draining mineralised catchments. in the plym, and for a given sample type, concentrations of tl were rather invariant between sample locations and avera ... | 2013 | 23465575 |