Bianca Frombold

Former Member
Master student


After having completed my apprenticeship as a chemical laboratory assistant in 2011, I decided to study Environmental Science at the University of Koblenz-Landau. I wrote my bachelor thesis at the department of Environmental and Soil Chemistry with the topic “Impact of chemical composition of ecotoxicological test media on the stability and aggregation status of silver nanoparticles”. During this time I came in contact with the field of ecotoxicology and therefore decided to start the master program in Landau. During the summer of 2015, I did my three-month AMEO internship at a contract research lab “IES Ltd.” (Innovative Environmental Services) in Witterswil, Switzerland. There, I was employed at the department of terrestrial ecotoxicology and worked with bees and arthropods in the field as well as in the laboratory. Currently I am working on my master thesis which deals with the toxicity of Bacillus thuringiensis israelensis (Bti) and its impact on larvae of the common frog (Rana temporaria) as well as the palmate newt (Lissotriton helveticus) by taking into account individual development and biomarkers of both of them.

Current Studies

The master thesis I am currently working on deals with the toxicity of the biocide Bacillus thuringiensis israelensis (Bti) on non-target organisms. Especially along large river systems like the Upper Rhine Valley, mosquitoes constitute their breeding grounds and become a major nuisance for humans and animals inhabiting this area. Therefore several tons of three different Bti formulations are extensively used there each year. Amphibians get into direct contact with the formulations due to the occurrence of mosquitoes in their spawning ponds. The common frog (Rana temporaria) and the palmate newt (Lissotriton helveticus) are chosen as representatives for the European species and are used for the investigations of Bti effects on amphibians. However, the effects of the formulations containing Bti on non-target organisms are still little investigated and therefore the study has the aim to find out if the massive use of Bti-formulations has any lethal or sublethal effects on the native amphibians.