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Titolo:
PROBLEMS AND RECOMMENDATIONS IN USING ALGAL TOXICITY TESTING TO EVALUATE CONTAMINATED SEDIMENTS
Autore:
HALL NE; FAIRCHILD JF; LAPOINT TW; HEINE PR; RUESSLER DS; INGERSOLL CG;
Indirizzi:
NATL BIOL SERV,MIDWEST SCI CTR,4200 NEW HAVEN RD COLUMBIA MO 65201 NATL BIOL SERV,MIDWEST SCI CTR COLUMBIA MO 65201
Titolo Testata:
Journal of Great Lakes research
fascicolo: 3, volume: 22, anno: 1996,
pagine: 545 - 556
SICI:
0380-1330(1996)22:3<545:PARIUA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIOASSAY; RIVER; IDENTIFICATION; CAPRICORNUTUM; COMMUNITIES; RESPONSES;
Keywords:
ALGAE; TOXICITY; SEDIMENT; ELUTRIATES; STIMULATION; GREAT LAKES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
N.E. Hall et al., "PROBLEMS AND RECOMMENDATIONS IN USING ALGAL TOXICITY TESTING TO EVALUATE CONTAMINATED SEDIMENTS", Journal of Great Lakes research, 22(3), 1996, pp. 545-556

Abstract

Algae were used to evaluate the toxicity of elutriates prepared from contaminated sediments from several Great Lakes Areas of Concern. A single-species laboratory toxicity test using Selenastrum capricornutum was adapted from the U.S. Environmental Protection Agency's standard 96-h algal assay procedure. This standard method was converted to a 24-h photosynthetic test requiring only 25-mL sample volumes. Algal cellswere exposed to elutriates supplemented with nutrients and radioactive inorganic carbon. Toxicity was measured as carbon uptake relative tocontrols. All elutriates were stimulatory relative to the negative control. Stimulation complicated interpretation of results and preventedcalculation of effective concentrations causing a decrease in algal photosynthesis. Samples could be classified as toxic or non-toxic basedupon dilution series response curves; however, classical dose:response curves were rarely observed. Algal results generally supported thosederived from Daphnia and Microtox (TM) tests. Successful use of algalbioassays to evaluate the toxicity of sediment elutriates will require development of a standard media or sediment extract which could serve as an acceptable negative control or diluent. This could reduce the confounding effect of nutrient stimulation which complicates the use of algal toxicity testing in sediment toxicity assessments.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 13:25:02