TY  - JOUR
A1  - Müller, Ruth
A1  - Seeland, Anne
A1  - Jagodzinski, Lucas S.
A1  - Diogo, Joao B.
A1  - Nowak, Carsten
A1  - Oehlmann, Jörg
T1  - Simulated climate change conditions unveil the toxic potential of the fungicide pyrimethanil on the midge Chironomus riparius : a multigeneration experiment
T2  - Ecology and evolution
N2  - Although it has been suggested that temperature increase may alter the toxic potential of environmental pollutants, few studies have investigated the potential risk of chemical stressors for wildlife under Global Climate Change (GCC) impact. We applied a bifactorial multigeneration study in order to test if GCC conditions alter the effects of low pesticide concentrations on life history and genetic diversity of the aquatic model organism Chironomus riparius. Experimental populations of the species were chronically exposed to a low concentration of the fungicide pyrimethanil (half of the no-observed-adverse-effect concentration: NOAEC/2) under two dynamic present-day temperature simulations (11.0–22.7°C; 14.0–25.2°C) and one future scenario (16.5–28.1°C). During the 140-day multigeneration study, survival, emergence, reproduction, population growth, and genetic diversity of C. riparius were analyzed. Our results reveal that high temperature and pyrimethanil act synergistically on the midge C. riparius. In simulated present-day scenarios, a NOAEC/2 of pyrimethanil as derived from a life-cycle toxicity test provoked only slight-to-moderate beneficial or adverse effects on C. riparius. In contrast, exposure to a NOAEC/2 concentration of pyrimethanil at a thermal situation likely for a summer under GCC conditions uncovered adverse effects on mortality and population growth rate. In addition, genetic diversity was considerably reduced by pyrimethanil in the future scenario, but only slightly under current climatic conditions. Our multigeneration study under near-natural (climatic) conditions indicates that not only the impact of climate change, but also low concentrations of pesticides may pose a reasonable risk for aquatic insects in future.
KW  - dynamic temperature
KW  - genetic diversity
KW  - low-dose effects
KW  - multiple stressors
KW  - near-natural
KW  - NOAEC
Y1  - 2011
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/26773
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-267733
SN  - 2045-7758
N1  - © 2011 The Authors. Published by Blackwell Publishing Ltd. This is an Open Access article under the terms of the Creative Commons Attribution Non Commercial License which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
VL  - 2
IS  - 1
SP  - 196
EP  - 210
PB  - John Wiley & Sons, Inc.
CY  - [S.l.]
ER  -