Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s10646-012-0857-8
Titel (primär) Interspecific competition delays recovery of Daphnia spp. populations from pesticide stress
Autor Knillmann, S.; Stampfli, N.C.; Noskov, Y.A.; Beketov, M.A.; Liess, M.
Quelle Ecotoxicology
Erscheinungsjahr 2012
Department OEKOTOX
Band/Volume 21
Heft 4
Seite von 1039
Seite bis 1049
Sprache englisch
Keywords Recovery; Competition; Toxicant; Daphnia; Community context; Indirect effects

Xenobiotics alter the balance of competition between species and induce shifts in community composition. However, little is known about how these alterations affect the recovery of sensitive taxa. We exposed zooplankton communities to esfenvalerate (0.03, 0.3, and 3 μg/L) in outdoor microcosms and investigated the long-term effects on populations of Daphnia spp. To cover a broad and realistic range of environmental conditions, we established 96 microcosms with different treatments of shading and periodic harvesting. Populations of Daphnia spp. decreased in abundance for more than 8 weeks after contamination at 0.3 and 3 μg/L esfenvalerate. The period required for recovery at 0.3 and 3 μg/L was more than eight and three times longer, respectively, than the recovery period that was predicted on the basis of the life cycle of Daphnia spp. without considering the environmental context. We found that the recovery of sensitive Daphnia spp. populations depended on the initial pesticide survival and the related increase of less sensitive, competing taxa. We assert that this increase in the abundance of competing species, as well as sub-lethal effects of esfenvalerate, caused the unexpectedly prolonged effects of esfenvalerate on populations of Daphnia spp. We conclude that assessing biotic interactions is essential to understand and hence predict the effects and recovery from toxicant stress in communities.
dauerhafte UFZ-Verlinkung
Knillmann, S., Stampfli, N.C., Noskov, Y.A., Beketov, M.A., Liess, M. (2012):
Interspecific competition delays recovery of Daphnia spp. populations from pesticide stress
Ecotoxicology 21 (4), 1039 - 1049 10.1007/s10646-012-0857-8