News

Published on July 28, 2014

Microplastics in bivalves cultured for human consumption

env pollutToday, 27 years after Cpt. Charles J. Moore first discovered the Great Pacific Garbage Patch, marine plastic pollution continues to be a growing threat to the marine environment. As plastic debris is ubiquitious across the world's seas and oceans, the consequences of macroplastics for most (vertebrate) wildlife have been identified over the years. Yet, to date, the impacts of microplastics are less understood. These plastic particles (< 1mm), which are found in cosmetics and can be formed through the degradation of larger plastic items, are becoming increasingly abundant. As our research has shown, they can now be found from the surface layer all the way down to the deep-sea sediment. Worringly, microplastics can be ingested by a wide range of marine organisms because of their small dimensions which in turn creates an understudied risk of exposure for human consumers. Here we present the first study to report on the possible consequences of marine microplastics for human consumers by analysing the occurence of microplastics in commercially available shellfish. From our results, we calculated that the average European shellfish consumer has an uptake of 6400 microplastics per year. As there is a lack of (mammal) effect studies, this exposure poses an unknown risk for human health.

Published on July 16, 2014

Inferring time-variable effects of nutrient enrichment on marine ecosystems using inverse modelling and ecological network analysis

scitotenv thumb100 Despite the restrictions imposed by the ever increasing legislation, anthropogenic nutrient inputs continue to be a worldwide threat to our marine ecosystems. The resulting elevated nitrogen and phosphorus concentrations can promote intensive algal blooms which may decrease transparancy, deplete oxygen and change the composition of the fish community. In recent years, these ecosystem-level consequences  of anthropogenic nutrient enrichment are being studied from a topological perspective (ie. who eats whom). However, it has been noted that this perspective is insufficient to understand the magnitudes of energy and materials that flow through natural food webs. To circumvent this, we used a mesocosm approach combined with linear inverse modelling to estimate carbon flows in a foodweb subjected to different nutrient treatments. In doing so, we found that the systems activity is positively but nonlinearly affected by the addition of nutrients. Surprisingly, detritus appears to be a crucial, if not predominant, driver of the ecosystem functioning under all nutrient conditions.

Published on July 10, 2014

Are there species-specific tolerances towards cyanobacteria in Daphnia?

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Cyanobacterial blooms have been a growing environmental concern due to their ability to produce toxins. Yet to date, few studies have focused on comparing the effects of different cyanobacteria. In this publication, we determined the effects of six common cyanobacteria on two keystone species in the aquatic environment, Daphnia magna and Daphnia pulex. Sensitivity depended upon the concentration of the cyanobacteria and differed between the Daphnia species. The publication of this paper coincided with the recent webinar 

Published on July 10, 2014

Prof. Janssen explains the relevance of the EU SCHER to 22.000 readers... in 23 languages

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While conducting innovative research to improve the ecological risk assessment of chemicals remains the core business of the GhEnToxLab, we actively encourage societal participation, social debate and public outreach. In light of this, Prof. Dr. Colin Janssen, chair of the European Scientific Committee on Health and Environmental Risks (SCHER), explains the role of SCHER in the European decision making. In 23 languages!

 

 Role of SCHER

 

 

Published on June 26, 2014

Microplastics in the news: radio interviews with Prof. Janssen

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Due to the rapidly growing scientific and public awareness on the occurrence and adverse effects of microplastics, news on microplastic usage and research is increasingly being picked up by the mainstream media. Just last month, it was shown that the polar ice caps harbour vast amounts of microplastics which could be released through global warming. A few weeks later, the state of Illinois passed legislation which will ban the manufacture of microbead containing products by 2018. As a leading authority on microplastic research in Belgium, Prof. Dr. Colin Janssen of the GhEnToxLab was asked to elaborate on these news items by the national radio channel Radio 1. You can listen again to these interviews on the website of Radio 1 (Dutch spoken).

 

Illinois bill interview

Polar ice interview

(courtesy of VRT - Radio 1)

Published on June 10, 2014

Francqui Foundation Fellowship for GhEnToxLab member Dr. Jana Asselman

BAEF logoDr. Jana Asselman (GhEnToxLab) received a Francqui Foundation Fellowship of the Belgian American Educational Foundation for the year 2014-2015 (BAEF). The fellowship is sponsored by the Francqui Foundation and is only awarded after a selection process based on the scientific excellence of the candidate and the research proposal. This year, nine researchers were awarded a Francqui Foundation Fellowship. This fellowship will allow Dr. Asselman to spend a year at Notre Dame University as a postdoctoral researcher (USA, www.nd.edu) and conduct innovative genomics research at the lab of Prof. Dr. Michael Pfrender. The project will focus on the genetic effects of metals to freshwater organisms exposed to salinity stress. Furthermore, this project will also provide a unique opportunity to strengthen the collaboration between GhEnToxLab and the lab of Prof. Pfrender. Congratulations, Jana!

Published on June 1, 2014

Are interactive effects of harmful algal blooms and copper pollution a concern for water quality management?

water researchCyanobacteria, commonly known as harmful algae due to their adverse effects on aquatic organisms, are a major concern to water quality. While it is well-known that cyanobacteria reduce the fitness of Daphnia sp., their combined effects with chemicals have hardly been documented. In our recent paper, we investigate how cyanobacteria act together with copper, commonly used in algaecides and fungicides, to impact the model organism Daphnia. The results show that cyanobacteria and copper together can considerably impair daphnid reproduction but that their combined effects are overall close to expectations based on their individual toxicities and hence of limited concern for water quality management.

Published on May 26, 2014

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

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Prof. Karel De Schamphelaere has been elected as a SETAC Europe council member (representing academia). The SETAC Europe council is the governing body of SETAC Europe that takes decisions about conferences, symposia, awards, public relations, finances etc. Prof. Karel De Schamphelaere will to contribute to further optimizing the opportunities within SETAC for tripartite (life-long) education, research, collaboration and communication between academia, industry and government.  He wants to achieve this by strongly interacting with the entire SETAC membership during all possible occasions, and bringing all relevant ideas, questions, worries, etc… of members to council for discussion, regardless of affiliation, country or career stage (because, according to him,  diversity in all its aspects is a basis for creativity and progress).  Congratulations Prof. Karel De Schamphelaere!

Published on May 26, 2014

Environmental effects on fished lobsters and crabs

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In times of climate change, when the sea temperatures are increasing in the world oceans, and ocean acidification is becoming and increasing concern, information of environmental effects on key life history stages of important species is important and needs to be readily available. Lobsters and crabs are key commercial species, and due to their complex life cycle different environmental variable may have dissimilar effects on their abundance, depending on the life stage considered. This review will be very valuable for managers, fishermen as well as scientists alike.

 

Published on May 19, 2014

In Knack: Drs. Lisbeth Van Cauwenberghe comments on microplastic use in cosmetics.

lisbethLisbeth Van Cauwenberghe is currently conducting research on microplastics in a marine environment at GhEnToxLab. Knack (a weekly flemish newsmagazine) interviewed our colleague on the possible environmental and health issues of these microplastics.

Read the full article (Dutch) at: http://www.knack.be/nieuws/planet-earth/plastic-op-uw-bord-in-ruil-voor-een-gave-huid/article-normal-144153.html

 

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