Инд. авторы:	Knillmann S., Stampfli N.C., Noskov Y.A., Beketov M.A., Liess M.
Заглавие:	Interspecific competition delays recovery of Daphnia spp. populations from pesticide stress
Библ. ссылка:	Knillmann S., Stampfli N.C., Noskov Y.A., Beketov M.A., Liess M. Interspecific competition delays recovery of Daphnia spp. populations from pesticide stress // Ecotoxicology. - 2012. - Vol.21. - Iss. 4. - P.1039-1049. - ISSN 0963-9292. - EISSN 1573-3017.
Внешние системы:	DOI: 10.1007/s10646-012-0857-8; PubMed: 22311421; SCOPUS: 2-s2.0-84862886997; WoS: 000302800900007;
Реферат:	eng: 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 mu g/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 mu g/L esfenvalerate. The period required for recovery at 0.3 and 3 mu g/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.
Ключевые слова:	ESFENVALERATE; RISK-ASSESSMENT; AQUATIC ORGANISMS; LITTORAL ENCLOSURES; ZOOPLANKTON COMMUNITY; COMPARATIVE SENSITIVITY; MEDITERRANEAN CONDITIONS; VALDEZ OIL-SPILL; SHORT-TERM EXPOSURE; Indirect effects; Community context; Daphnia; Toxicant; Competition; Recovery; INSECTICIDE;
Издано:	2012
Физ. характеристика:	с.1039-1049