Title: A mixture of environmental organic contaminants in lake sediments affects hatching from Daphniaresting eggs
Authors : Möst, Markus
Chiaia-Hernandez, Aurea C.
Frey, Martin P.
Hollender, Juliane
Spaak, Piet
Published in : Environmental toxicology and chemistry
Volume(Issue) : 34
Issue : 2
Pages : 338
Pages to: 345
Publisher / Ed. Institution : Wiley
Issue Date: 2015
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Daphnia; Mixture toxicology; Organic contaminants; Resting egg bank; Sediment toxicity; Animals; Daphnia; Geologic Sediments; Lakes; Linear Models; Organic chemicals; Ovum; Time Factors; Chemical water pollutants; Environmental exposure
Subject (DDC) : 333.7: Land, recreational areas and energy
363: Environmental and security problems
Abstract: Despite the relevance of resting eggs for ecology and evolution of many aquatic organisms and their exposure to contaminants accumulating in sediments, ecotoxicological studies using resting eggs are vastly underrepresented. The authors established a method to perform exposure assays with resting eggs produced by the Daphnia longispina species complex, key species in large lake ecosystems. A mixture of organic contaminants previously detected in sediments of Lake Greifensee was selected to test the potential effect of organic contaminants present in sediments on the hatching process. Resting eggs were exposed to a mix of 10 chemicals, which included corrosion inhibitors, biocides, pesticides, and personal care products, for a period of 15 d. Using an automated counting software, the authors found a significant increase in hatching success in the exposed resting eggs compared with controls. Such an effect has not yet been reported from ecotoxicological assays with resting eggs. Possible mechanistic explanations as well as the potential implications on the ecology and evolution of aquatic species that rely on a resting egg banks are discussed. Observed increased mortality and developmental abnormalities for hatchlings in the exposure treatments can be explained by toxic contaminant concentrations. The results of the present study highlight the need for additional studies assessing the effects of organic contaminants on resting egg banks and aquatic ecosystems.
Departement: School of Engineering
Organisational Unit: Institute of Data Analysis and Process Design (IDP)
Publication type: Article in scientific Journal
DOI : 10.1002/etc.2808
ISSN: 0730-7268
1552-8618
URI: https://digitalcollection.zhaw.ch/handle/11475/12908
Appears in Collections:Publikationen School of Engineering

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