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Titolo:
The use of outdoor freshwater pond microcosms. III. Responses of phytoplankton and periphyton to pyridaben
Autore:
Rand, GM; Clark, JR; Holmes, CM;
Indirizzi:
Florida Int Univ, SERC, Dept Environm Studies, Miami, FL 33199 USA FloridaInt Univ Miami FL USA 33199 Environm Studies, Miami, FL 33199 USA BASF Corp, Agr Prod Ctr, Res Triangle Pk, NC 27709 USA BASF Corp Res Triangle Pk NC USA 27709 Ctr, Res Triangle Pk, NC 27709 USA
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY
fascicolo: 1, volume: 16, anno: 2001,
pagine: 96 - 103
SICI:
1520-4081(200102)16:1<96:TUOOFP>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMMUNITY STRUCTURE; INSECTICIDE;
Keywords:
aquatic microcosms; FIFRA; pyridaben; pesticides; phytoplankton; periphyton;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Rand, GM Florida Int Univ, SERC, Dept Environm Studies, Univ Pk, Miami, FL33199 USA Florida Int Univ Univ Pk Miami FL USA 33199 , Miami, FL 33199 USA
Citazione:
G.M. Rand et al., "The use of outdoor freshwater pond microcosms. III. Responses of phytoplankton and periphyton to pyridaben", ENVIRON TOX, 16(1), 2001, pp. 96-103

Abstract

An outdoor freshwater microcosm study was conducted in which pyridaben, aninsecticide-miticide, was directly applied to water to determine its biological effects on phytoplankton and periphyton. Twenty-four microcosms (24 m(3) each) were monitored for 11 months, then four treatments of pyridaben were applied two times at three concentrations (0.34, 3.4, 34.0 mug/L), including an untreated control. The succession of algal groups observed and themajor genera found in microcosms during the baseline phase of the study were typical of oligo-mesotrophic systems in Florida. Following application of pyridaben, the most remarkable effect was a positive correlation of phytoplankton abundance with pyridaben concentrations in water; indicating increased abundance as a result of exposure. Both Chlorophyta and Pyrrophyta exhibited a significant increase (p=0.05) in population abundance at 3.4 and 34.0 mug/L pyridaben. Chrysophyta also elicited a trend of increased abundance at 34.0 mug/L, although the effect was not significant. The effects on phytoplankton populations were associated with the decline of zooplankton populations as a result of a direct effect of pyridaben exposure. There were no effects of pyridaben on periphyton communities or on functional endpoints. (C) 2001 by John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 06:43:24