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Titolo:
An evaluation of selenium concentrations in water, sediment, invertebrates, and fish from the Republican River Basin: 1997-1999
Autore:
May, TW; Walther, MJ; Petty, JD; Fairchild, JF; Lucero, J; Delvaux, M; Manring, J; Armbruster, M; Hartman, D;
Indirizzi:
Columbia Environm Res Ctr, US Geol Survey, Columbia, MO 65201 USA ColumbiaEnvironm Res Ctr Columbia MO USA 65201 y, Columbia, MO 65201 USA US Bur Reclamat, Billings, MO USA US Bur Reclamat Billings MO USAUS Bur Reclamat, Billings, MO USA US Bur Reclamat, Nebraska Kansas Area Off, Gand Island, NE USA US Bur Reclamat Gand Island NE USA Kansas Area Off, Gand Island, NE USA US Bur Reclamat, D8210, Denver, CO USA US Bur Reclamat Denver CO USAUS Bur Reclamat, D8210, Denver, CO USA US Bur Reclamat, Dakota Area Off, Bismarck, ND USA US Bur Reclamat Bismarck ND USA lamat, Dakota Area Off, Bismarck, ND USA
Titolo Testata:
ENVIRONMENTAL MONITORING AND ASSESSMENT
fascicolo: 2, volume: 72, anno: 2001,
pagine: 179 - 206
SICI:
0167-6369(2001)72:2<179:AEOSCI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
IRRIGATION DRAINWATER; IMPACTS; CONTAMINATION; REPRODUCTION; BLUEGILLS; DRAINAGE;
Keywords:
bioaccumulation; biological effects thresholds; fish; invertebrates; irrigation; Republican River; sediment; selenium; water;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: May, TW Columbia Environm Res Ctr, US Geol Survey, Columbia, MO 65201 USA Columbia Environm Res Ctr Columbia MO USA 65201 bia, MO 65201 USA
Citazione:
T.W. May et al., "An evaluation of selenium concentrations in water, sediment, invertebrates, and fish from the Republican River Basin: 1997-1999", ENV MON ASS, 72(2), 2001, pp. 179-206

Abstract

The Republican River Basin of Colorado, Nebraska, and Kansas lies in a valley which contains Pierre Shale as part of its geological substrata. Selenium is an indigenous constituent in the shale and is readily leached into surrounding groundwater. The Basin is heavily irrigated through the pumping of groundwater, some of which is selenium-contaminated, onto fields in agricultural production. Water, sediment, benthic invertebrates, and/or fish were collected from 46 sites in the Basin and were analyzed for selenium to determine the potential for food-chain bioaccumulation, dietary toxicity, andreproductive effects of selenium in biota. Resulting selenium concentrations were compared to published guidelines or biological effects thresholds. Water from 38% of the sites (n = 18) contained selenium concentrations exceeding 5 mug L-1, which is reported to be a high hazard for selenium accumulation into the planktonic food chain. An additional 12 sites (26% of the sites) contained selenium in water between 3-5 mug L-1, constituting a moderate hazard. Selenium concentrations in sediment indicated little to no hazard for selenium accumulation from sediments into the benthic food chain. Ninety-five percent of benthic invertebrates collected exhibited selenium concentrations exceeding 3 mug g(-1), a level reported as potentially lethal tofish and birds that consume them. Seventy-five percent of fish collected in 1997, 90% in 1998, and 64% in 1999 exceeded 4 mug g(-1) selenium, indicating a high potential for toxicity and reproductive effects. However, examination of weight profiles of various species of collected individual fish suggested successful recruitment in spite of selenium concentrations that exceeded published biological effects thresholds for health and reproductive success. This finding suggested that universal application of published guidelines for selenium may be inappropriate or at least may need refinement for systems similar to the Republican River Basin. Additional research is needed to determine the true impact of selenium on fish and wildlife resourcesin the Basin.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 00:44:26