News

Published on May 10, 2014

GhEnToxLab researcher Dr. Dieter De Coninck wins SETAC Europe Best Publication Award

setaclogo2 thumb medium50 75

Every year SETAC Europe organises the Best Publication Award in the categories risk assessment, chemical analysis and ecotoxicology. This year the SETAC Europe Best Publication Award for risk assessment went to Dr. Dieter De Coninck, for his paper “An approach to assess the regulatory relevance of microevolutionary effects in ecological risk assessment of chemicals: a case study with cadmium”.

Published on May 10, 2014

Prof. Karel De Schamphelaere stands for election for a second 3-year term in the SETAC Europe Council

setaclogo2 thumb medium50 75

At the General Assembly of the Society of Environmental Toxicology and Chemistry (SETAC) Europe in Basel on Wednesday 14 May, prof. Karel De Schamphelaere, is one of three candidates for being elected as a SETAC Europe council member (representing academia). 

Published on May 7, 2014

GhEnToxLab at SETAC Europe

setaclogo2 thumb medium50 75Another year, another SETAC conference. This month, our GhEnToxLab members will be presenting their research at the 24th SETAC Europe Annual Meeting in Basel, Switzerland from 11-15 May 2014. There we will highlight our research in a total of six platforms, one poster corner and nine posters. To keep track of us during the conference, a comprehensive list of our activities is provided below. 

Published on April 22, 2014

GhEnToxLab is now on Twitter!

Twitter

Follow us on https://twitter.com/GhEnToxLab

where we provide updates on research,teaching

& other activities.

Get to know us!

 

 

Published on April 22, 2014

Elections at Ghent University

janaFrom the 5th till the 9th of May, Ghent University students and staff elect their representatives in various boards that govern the university. GhenToxLab is actively engaged in numerous boards and committees at both the faculty and the university level. Together with people from the Aquatic Ecology group, GhenToxLab members have applied for various representative positions. Prof. De Schamphelaere and Prof. Goethals (Aquatic Ecology) are both candidates to represent the ZAP staff in the Faculty Board of the Faculty of Biosciences. Drs. Jana Asselman and Dr. Pieter Boets (Aquatic Ecology) are both candidates to represent the AAP in the Faculty Board of the Faculty of Biosciences. In addition, Drs. Jana Asselman also teams up with Rob De Staelen from the Faculty of Engineering and Architecture to represent the AAP in the Board of Governors of Ghent University. You can read their election program on http://www.robrvb.ugent.be/en/

 

We warmly encourage you to support GhenToxLab and the Aquatic Ecology group during the elections! 

 

 

Published on April 8, 2014

The ChimERA project: coupling mechanistic exposure and effect models into an integrated platform for ecological risk assessment

EnvSciPol

Typically, environmental exposure and the expected ecological effects are assessed separately. Yet for the last 25 years, the environmental realism, the ecological relevance, and the methodological accuracy of these official procedures have been questioned. Bearing in mind the ecological and environmental complexity inherent to natural ecosystems, risk assessors increasingly realise that ecological risk cannot be adequately assessed while disregarding most, if not all, of this complexity. Exposure to chemicals is not constant in time nor is it homogeneously distributed in space. This may allow for recovery-inducing processes at the individual, population, and community level. In addition, real ecosystems may be faced with the combined effects of multiple stressors. Moreover, this approach neglects that functional redundancy may compensate species loss and sustain functions in stressed ecosystems. Experimentally examining the effects of multiple stressors at higher levels of biological organisation from multiple exposure scenarios in various geographical areas is an informative exercise but cannot be considered as a standard approach for ERA. Instead, new models are needed which can be extrapolated to many different alternative scenarios. In this paper, we outline the methodology and objectives of a new project which will answer this need.

Published on March 31, 2014

Toxicity data for modeling impacts of oil components in an Arctic ecosystem

10646Today, modeling has become an invaluable tool to extrapolate impacts of toxicants from an individual to the population level. As such, it is essential for ecosystem-based approaches to impact assessment. For modelling purposes, this study synthesized available literature on the effects of petroleum related discharges on selected cold-water marine species (plankton and fish). The resulting dataset is to be used by ecotoxicology algorithms included in an ecosystem-based modeling system that combines both ecological and toxicological knowledge into a single modeling framework. We believe this study is of general value to the ecotoxicology community in two ways: first, the assembled data are of use to others engaged in the development and/or application of ecotoxicology models. Second, the results indicate where further ecotoxicology research will be of greatest value for both increasing general knowledge on cold-water ecotoxicology and for designing new ecotoxicology studies for modeling applications.

Published on March 10, 2014

A comparison of the short-term toxicity of cadmium to indigenous and alien gammarid species

10646Alien invasive species (AIS) are, next to global change, considered to be one of the major threats to global biodiversity. Globalisation and habitat deterioration positively contribute to the establishment success of AIS. Besides appropriate vectors of introduction and favourable environmental conditions their success can be attributed to species specific traits such as a high reproduction rate, an omnivorous diet and the ability to easily cope with changing environmental conditions. In this study, we hypothesized that AIS are more tolerant to metal pollution compared to native species. We tested this hypothesis based on a comparison between native and alien freshwater shrimps that were exposed to different concentrations of cadmium. We found significant differences in sensitivity to metal pollution between different species which should be taken into consideration in environmental risk assessment and water quality standard setting. There was no clear trend in Cd sensitivity between native and alien shrimps, indicating that alien species do not have an advantage over native ones in cadmium contaminated waters.  

Published on March 5, 2014

Latest study on gene-expression respones in the waterflea to combined stressors featured on ChemicalWatch.com

ESnT

Genetic responses to environmental chemicals do not always correlate with higher-level effects, such as growth and reproduction in aquatic test species, according to our latest study recently published in the journal Environmental Science & Technology. This finding potentially has important implications for risk assessment in relation to the Adverse Outcome Pathways (AOP) framework. AOPs try to predict responses at higher biological levels, which are more relevant for risk assessment, starting from genetic responses. ChemicalWatch.com, an online repository which provides businesses with the information they need to manage the risks of chemicals responsibly, has recognized the important value of these findings and featured the study on their website. More information can be found on ChemicalWatch.com. The website allows a free 14-day trial which gives access to the full text.

Published on March 3, 2014

Relating taxonomy-based traits of macroinvertebrates with river sediment quality based on Basic and Zero-Inflated Poisson models

ecological informationsDue to growing anthropogenic stress on aquatic ecosystems it is important to have accurate and fast methods for environmental risk assessment. Ecological assessment of freshwaters is traditionally based on the diversity approach where diversity decreases with increasing environmental disturbance. In this paper, we propose a novel approach where modelled changes in trait composition of macroinvertebrates are used to assess the river sediment quality. We hypothesized that the trait composition, in this case the body length of the organisms, would change as metal concentrations increase. We found that the abundance of macroinvertebrate taxa decreased at almost all body lengths with a decreasing quality of the metal contaminated river sediment. It was also found that the number of different body lengths decreased with increasing metal pollution, indicating a decrease in diversity of the macroinvertebrate community. Smaller organisms seemed to be more resistant to metal pollution. This research showed that trait-based ecological risk assessment has high potential, but that possibly other traits besides body length should be included to strengthen our conclusions.

Pages