Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.ecoenv.2006.01.008
Title (Primary) Effects of an organophosphate on Daphnia magna at suborganismal and organismal levels: implications for population dynamics
Author Duquesne, S.
Source Titel Ecotoxicology and Environmental Safety
Year 2006
Department OEKOTOX
Volume 65
Issue 2
Page From 145
Page To 150
Language englisch
Keywords sensitivity; recovery; effect propagation; Daphnia; organophosphate; endpoint; threshold
Abstract The effects and recovery of 24 h pulse exposure to paraoxon-methyl on Daphnia magna were recorded for various endpoints to study the propagation of effects through various biological levels of organization. Above a threshold concentration (2.2 mu g L-1), all selected endpoints were affected. Thus, effects at the suborganismal level (e.g., the biomarker response: transient inhibition of cholinesterase (ChE) activity) were accompanied by effects at the organismal (survival, reduction in reproductive performance, decrease in body size) and population (reduced population growth rate) levels. At intermediate and sublethal concentrations, exposure induced a transient ChE inhibition that was also accompanied by effects at the organismal level and that exerted long-term effects on population dynamics. At lower concentrations, although ChE activity was affected, there was no propagation of effects to higher biological levels. This study shows that effects of pulse exposure to organophosphates propagate from the suborganismal level toward the population level and demonstrates the significance of transient ChE inhibition on population dynamics.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=2589
Duquesne, S. (2006):
Effects of an organophosphate on Daphnia magna at suborganismal and organismal levels: implications for population dynamics
Ecotox. Environ. Safe. 65 (2), 145 - 150 10.1016/j.ecoenv.2006.01.008