title: Seasonal changes of macroinvertebrate communities in a stormwater wetland collecting pesticide runoff from a vineyard catchment (Alsace, France).
abstract: Agricultural land use may influence macroinvertebrate 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 flufenoxuron, were continuously quantified at the inlet of the stormwater wetland from April to September (period of pesticide application). In parallel, benthic macroinvertebrate communities, pesticide concentrations, and physicochemical parameters in the wetland were assessed twice a month. Twenty-eight contaminated runoffs ranging from 1.1 to 114 m3 entered the wetland during the study period. Flufenoxuron concentrations in runoff-suspended solids ranged from 1.5 to 18.5 μg kg(-1) and reached 6 μg kg(-1) in the wetland sediments. However, flufenoxuron 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 flufenoxuron, vegetation cover, and flow conditions significantly determine the community structures of stormwater wetland macroinvertebrates. This study shows that flow conditions, vegetation cover, and runoff-related pesticides jointly affect communities of benthic macroinvertebrates in stormwater wetlands.
authors.affiliation: Laboratory of Hydrology and Geochemistry of Strasbourg, University of Strasbourg/ENGEES, UMR 7515 CNRS 1, rue Blessig, 67084, Strasbourg, France.
authors.forename: Sylvain
authors.initials: S
authors.lastname: Martin
authors.forename: Aurélie
authors.initials: A
authors.lastname: Bertaux
authors.forename: Florence
authors.initials: F
authors.lastname: Le Ber
authors.forename: Elodie
authors.initials: E
authors.lastname: Maillard
authors.forename: Gwenaël
authors.initials: G
authors.lastname: Imfeld
mesh_terms: D000383:Agriculture; D000818:Animals; D044822:Biodiversity; D016000:Cluster Analysis; D004784:Environmental Monitoring; D005602:France; D007448:Invertebrates / Q000187:drug effects*; D010575:Pesticides / Q000009:adverse effects* / Q000032:analysis; D011156:Population Density; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000009:adverse effects* / Q000032:analysis; D014877:Water Pollution, Chemical / Q000009:adverse effects* / Q000032:analysis; D053833:Wetlands
chemical_list: D010575:Pesticides; D014874:Water Pollutants, Chemical