Biomonitoring Articles

198 Results found
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  • Subcategory: Biomonitoring ×

A comparative approach using ecotoxicological methods from single‐species bioassays to model ecosystems

by John Wiley & Sons, Ltd.  (May 8, 2016)

Soft sediments are often hotspots of chemical contamination and a thorough ecotoxicological assessment of this habitat can help to identify the causes of stress and to improve the health of the respective ecosystem. As an important component of the ecologically relevant meiobenthic fauna, nematodes can be used for sediment assessments, with ...

Development of Helisoma trivolvis pond snails as biological samplers for biomonitoring of current‐use pesticides

by John Wiley & Sons, Ltd.  (Feb. 15, 2016)

Non‐target aquatic organisms residing in wetlands are commonly exposed to current‐use pesticides through spray drift and runoff. However, it is frequently challenging to measure exposure due to rapid dissipation of pesticides from water and reduced bioavailability. Our hypothesis is that freshwater snails can serve as bioindicators of pesticide ...

Mercury correlations among blood, muscle, and hair of northern elephant seals during the breeding and molting fasts

by John Wiley & Sons, Ltd.  (Jan. 12, 2016)

Mercury (Hg) biomonitoring and toxicological risk assessments for marine mammals commonly sample different tissues, making comparisons to toxicity benchmarks and among species and regions difficult. Few studies have examined how life history events, such as fasting, influence the relationship between total Hg (THg) concentrations in different ...

Generation of mt:egfp transgenic zebrafish biosensor for the detection of aquatic zinc and cadmium

by John Wiley & Sons, Ltd.  (Jan. 11, 2016)

Zebrafish embryo toxicity test has become a popular method for detecting the environmental pollutions. But our research showed that zebrafish embryos exhibited no visible paramorphia, malformation or mortality when exposed to heavy metals in a range above the environmental standard limits, indicating that zebrafish embryo an imprecise model in ...

Chronic effects of non‐weathered and weathered crude oil and dispersant associated with the deepwater horizon incident on development of larvae of the eastern oyster, Crassostrea virginica

by John Wiley & Sons, Ltd.  (Jan. 8, 2016)

In this study we examined the effects of chronic exposure of eastern oyster (Crassostrea virginica) larvae to the water‐accommodated fractions of fresh and weathered oils collected from the Deepwater Horizon (DWH) incident, with and without additions of the dispersant Corexit 9500A, as well as to solutions of Corexit alone. We found that both ...

Metals‐mediated climate susceptibility in a warming world: Larval and latent effects on a model amphibian

by John Wiley & Sons, Ltd.  (Dec. 17, 2015)

Though sophisticated models predict the effects of future temperatures on ectotherms, few also address how ubiquitous sublethal contaminants alter an organism's response to thermal stress. In ectotherms, higher metabolic rates from warming temperatures can beneficially speed metabolism and development. If compounded by chronic, sublethal ...

Physiological effects of essential metals on two detritivores: Atyaephyra desmarestii (Millet) and Echinogammarus meridionalis (Pinkster)

by John Wiley & Sons, Ltd.  (Oct. 16, 2015)

Freshwater ecosystems are essential for humans, however the input of several types of contamination lead to the degradation of these ecosystems. Thus, it is urgent to assess their health in order to allow actions for prevention and remediation. The level of trace metals can be enhanced due to natural or anthropogenic sources. Essential metals, ...

Concentration dependence of biotransformation in fish liver S9: Optimizing substrate concentrations to estimate hepatic clearance for bioaccumulation assessment

by John Wiley & Sons, Ltd.  (Oct. 15, 2015)

In vitro bioassays to estimate biotransformation rate constants of contaminants in fish are currently being investigated to improve bioaccumulation assessments of hydrophobic contaminants. The present study investigates the relationship between chemical substrate concentration and in vitro biotransformation rate of 4 environmental contaminants ...

Active biomonitoring locates pollutant sources in the Anacostia River (MD; DC; USA)

by John Wiley & Sons, Ltd.  (Oct. 1, 2015)

The freshwater Anacostia River watershed (MD, DC, USA) was surveyed for the sources of bioavailable EPA Priority Pollutants and toxic metals by active biomontoring (ABM) using the freshwater Asiatic clam Corbicula fluminea. The Anacostia River is a 456km2 tributary of the tidal freshwater Potomac River that includes the city of Washington DC ...

Sublethal effects of multi‐walled carbon nanotube exposure in the invertebrate Daphnia magna

by John Wiley & Sons, Ltd.  (Jul. 29, 2015)

Carbon nanotubes were previously demonstrated to accumulate on the carapace and in the gut of daphnids in aquatic exposures. The purpose of the present study is to assess the effects of multi‐walled carbon nanotube (MWNT) exposure on the sublethal Daphnia magna endpoints swimming behavior, algal feeding, growth, and reproduction and to ...

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