Pollution-induced community tolerance (PICT) as a tool for monitoring Lake Geneva long-term in situ ecotoxic restoration from herbicide contamination

Environmental Science and Pollution Research International
Floriane LarrasAgnès Bouchez

Abstract

Chemical monitoring revealed a regular decrease in herbicide concentration in Lake Geneva since last decades that may be linked to an ecotoxic restoration of nontarget phytoplanktonic communities. The Pollution-induced community tolerance (PICT) approach was tested as a tool to monitor the ecotoxic restoration of Lake Geneva for herbicides from 1999 to 2011. We conducted monthly assessments in 1999 and in 2011 for the tolerance of the phytoplankton communities to two herbicides (atrazine and copper), using PICT bioassays. The taxonomical composition of the communities was determined on the same collecting dates. The herbicide concentration decrease during the 12 years significantly influenced the composition of communities. The PICT monitoring indicated that a significant tolerance decrease in the community to both herbicides accompanied the herbicide concentration decrease. PICT measurements for atrazine and copper also changed at the intra-annual level. These variations were mainly due to community composition shifts linked to seasonal phosphorus and temperature changes. PICT monitoring on a seasonal basis is required to monitor the mean tolerance of communities. PICT appeared to be a powerful tool that reflected the toxic ef...Continue Reading

References

May 9, 2001·Environment International·C LeboulangerA Bérard
Jan 13, 2006·Bulletin of Environmental Contamination and Toxicology·C K LockertB D Siegfried
Feb 24, 2006·Environmental Toxicology and Chemistry·Patricia PérezEmilio Fernández
Jan 25, 2008·Environmental Toxicology·Nathalie ChèvreFrançois Rapin
Dec 17, 2009·Aquatic Toxicology·Katja KnauerStefanie Knauert
Apr 15, 2010·Archives of Environmental Contamination and Toxicology·Ursula DorigoBernard Montuelle
Jan 8, 2014·Environmental Science & Technology·Floriane LarrasAgnès Bouchez
Mar 19, 2014·Ecotoxicology and Environmental Safety·K Suresh KumarKyung-Hoon Shin
Apr 20, 2014·The Science of the Total Environment·Rebecca J WoodBen J Kefford

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