کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4427250 | 1309151 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Sampling method, storage and pretreatment of sediment affect AVS concentrations with consequences for bioassay responses Sampling method, storage and pretreatment of sediment affect AVS concentrations with consequences for bioassay responses](/preview/png/4427250.png)
Sediment treatment and sediment storage may alter sediment toxicity, and consequently biotic response. Purpose of our study was to combine these three aspects (treatment–toxicity–biotic response) in one integrated approach. We used Acid Volatile Sulfide (AVS) concentrations as a proxy of the disturbance of the sediment. AVS and Simultaneously Extracted Metal (SEM) concentrations were compared to bioassay responses with the freshwater benthic macroinvertebrate Asellus aquaticus. Storage conditions and sediment treatment affected AVS but not SEM levels. AVS can be used as a proxy for sediment disturbance. The best way to pretreat the sediment for use in a bioassay in order to maintain initial AVS conditions was to sample the sediment with an Ekman grab, immediately store it in a jar without headspace, and freeze it as soon as possible. In a survey using seven different sediments, bioassay responses of A. aquaticus were correlated with SEM and AVS characteristics.
Journal: Environmental Pollution - Volume 151, Issue 1, January 2008, Pages 243–251