Intraspecific competition increases toxicant effects in outdoor pond microcosms.

Ecotoxicology
Saskia KnillmannMatthias Liess

Abstract

Competition is a ubiquitous factor in natural populations and has been reported to alter the ecological impact of xenobiotics. We investigated conditions that mirror the natural variation of environmental factors. For this, different treatments were applied to 96 outdoor pond microcosms by shading the ponds and harvesting the communities. Then, the effect of esfenvalerate (0.03, 0.3, and 3 μg/L) on populations of Daphnia spp. was investigated. The pesticide effect and the sensitivity of Daphnia spp. in the context of a zooplankton community was increased by intraspecific competition 11 days after contamination. This relationship was most pronounced at 0.03 and 0.3 μg/L esfenvalerate, which were the concentrations that led to partial mortality. In contrast, interspecific interaction did not significantly alter the effect of the toxicant on Daphnia spp. Modelled concentration-response curves showed that the negative effects of the pesticide differed by a factor of up to 100 depending on the strength of intraspecific competition. In addition, a wider range of concentrations led to negative effects at high levels of intraspecific competition than at low levels. We argue that increased intraspecific competition reduces the availabil...Continue Reading

References

Dec 1, 1995·Ecotoxicology and Environmental Safety·M J BarryD A Holdway
Jan 24, 2002·Environmental Toxicology and Chemistry·Matthias Liess
Feb 12, 2002·Environmental Toxicology and Chemistry·Harm G van der GeestMichiel H S Kraak
Nov 26, 2003·Environmental Pollution·Sara C AntunesFernando Gonçalves
Aug 23, 2005·Environmental Toxicology and Chemistry·Mikhail A Beketov, Matthias Liess
May 13, 2011·Aquatic Toxicology·Nathalie C StampfliMikhail A Beketov
May 1, 1990·Oecologia·A Ross Black, Stanley I Dodson

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Citations

Jun 25, 2014·PloS One·Erick Maurício G CordeiroRaul Narciso C Guedes
Jan 1, 2014·Aquatic Toxicology·Ida DolciottiMatthias Liess
Aug 29, 2014·Ecotoxicology and Environmental Safety·Maria D PavlakiSusana Loureiro
Dec 24, 2015·Bulletin of Environmental Contamination and Toxicology·R RosaJ L T Pestana
Apr 30, 2013·Integrated Environmental Assessment and Management·Agnieszka J BednarskaRyszard Laskowski
Apr 30, 2013·Integrated Environmental Assessment and Management·Paul J Van den BrinkAndreas Focks
Mar 4, 2014·Journal of Vector Ecology : Journal of the Society for Vector Ecology·Iris KroegerMatthias Liess
Mar 25, 2014·Environmental Pollution·S SmetanováM A Beketov
Apr 4, 2015·Proceedings. Biological Sciences·Jeremias Martin Becker, Matthias Liess
Sep 30, 2014·Trends in Ecology & Evolution·Arne SchröderTom C Cameron
Jan 10, 2018·Ecotoxicology·Andreia C M RodriguesJoão L T Pestana
Jan 9, 2017·Environmental Science and Pollution Research International·C VenâncioI Lopes
Dec 5, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J P BrayB J Kefford
Jan 2, 2021·The Science of the Total Environment·Hannah M LowesTamzin A Blewett
May 21, 2021·Ecotoxicology and Environmental Safety·Barbara Joncour, William A Nelson
Jul 31, 2021·The Science of the Total Environment·Oliver WeisnerMatthias Liess
Jul 7, 2017·Environmental Science & Technology·Jochen P ZubrodMirco Bundschuh
Oct 5, 2019·Environmental Science & Technology·Naeem ShahidSaskia Knillmann

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