Путеводитель к информационным узлам и порталам для сельскохозяйственного исследования для развития

Water quality and contaminant evaluation at Union Slough National Wildlife Refuge, 1990 and 1991


In 1990 sediment and water samples were collected at five outlets in Union Slough National Wildlife Refuge. Forty eight hour sediment bioassay results revealed larval fathead minnow mortality at two of the outlet sites. Water bioassays of the same time frame resulted in no larval fathead minnow mortality at any sampling site.

Elevated concentrations of ammonia were the suspected causative agent during this phase of the study. In 1991 sediment sampling was continued at three of the same five outlet sites. Inorganic analysis of the sediments revealed the presence of eight metals in elevated concentrations. Trace amounts of four polynuclear aromatic hydrocarbons were detected at all three outlets. There were no organochlorine pesticide residues, no organophosphorus pesticides and no chlorophenoxy acid herbicides detected at any site during the sediment analysis. All of the outlet sites had elevated ammonia concentrations. Future studies are proposed to identify background concentrations of agricultural products and agriculture practices in the area, which may affect water quality.

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Соединенные Штаты Америки
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agINFRA The RING is part of the agINFRA project EC 7th framework program INFRA-2011-1.2.2 - Grant agr. no: 283770