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Arch Environ Contam Toxicol (2012) 62:2941 DOI 10.1007/s00244-011-9687-6
Seasonal Changes of Macroinvertebrate Communities in a Stormwater Wetland Collecting Pesticide Runoff From a Vineyard Catchment (Alsace, France)
Sylvain Martin Aurlie Bertaux Florence Le Ber
Elodie Maillard Gwenal Imfeld
Received: 28 January 2011 / Accepted: 23 May 2011 / Published online: 8 June 2011 Springer Science+Business Media, LLC 2011
Abstract Agricultural land use may inuence macroin-vertebrate communities by way of pesticide contamination associated with agricultural runoff. However, information about the relation between runoff-related pesticides and communities of benthic macroinvertebrates in stormwater wetland that receive agricultural runoff does not currently exist. Here we show changes in macroinvertebrates communities of a stormwater wetland that collects pesticide-contaminated runoff from a vineyard catchment. Sixteen runoff-associated pesticides, including the insecticide ufenoxuron, were continuously quantied at the inlet of the stormwater wetland from April to September (period of pesticide application). In parallel, benthic macroinvertebrate communities, pesticide concentrations, and physico-chemical parameters in the wetland were assessed twice a month. Twenty-eight contaminated runoffs ranging from1.1 to 114 m3 entered the wetland during the study period. Flufenoxuron concentrations in runoff-suspended solids ranged from 1.5 to 18.5 lg kg-1 and reached 6 lg kg-1 in the wetland sediments. However, ufenoxuron could not be detected in water. The density, diversity, and abundance of macroinvertebrates largely varied over time. Redundancy and formal concept analyses showed that concentrations of ufenoxuron, vegetation cover, and ow conditions signicantly determine the community structures of
stormwater wetland macroinvertebrates. This study shows that ow conditions, vegetation cover, and runoff-related pesticides jointly affect communities of benthic macroin-vertebrates in stormwater wetlands.
Runoff represents a prevailing process of mobilization and transfer of pesticides from agricultural land into aquatic ecosystems (Liess and Schulz 1999; Schriever and Liess 2007). Agricultural surface runoff can transport large amounts of pesticides and cause, in receiving ecosystems, adverse ecotoxicological effects on nontarget organisms, such as macroinvertebrates (Liess and Schulz 1999; Liess and von der Ohe 2005; Thiere and Schulz 2004). In particular, sediments in ecosystems receiving contaminated runoff can be a sink for pesticides associated with suspended solids (Fiedler and Rsler 1993). However, the relation between pesticides in agricultural runoff and the seasonal dynamics of benthic macroinvertebrate communities has rarely been assessed in the eld (Jergentz et al. 2004; Liess and Schulz 1999; Thiere...