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Titolo:
Effects of Cu+2 and pH on the fitness of Ceriodaphnia dubia (Richard 1894)(Crustacea, Cladocera) in microcosm experiments
Autore:
Gagneten, AM; Vila, I;
Indirizzi:
Univ Nacl Litoral, Fac Humanidades & Ciencias, RA-3000 Santa Fe, ArgentinaUniv Nacl Litoral Santa Fe Argentina RA-3000 RA-3000 Santa Fe, Argentina Univ Chile, Fac Ciencias, Dept Ciencias Ecol, Santiago, Chile Univ Chile Santiago Chile Ciencias, Dept Ciencias Ecol, Santiago, Chile
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY
fascicolo: 5, volume: 16, anno: 2001,
pagine: 428 - 438
SICI:
1520-4081(200110)16:5<428:EOCAPO>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIFE-HISTORY CONSEQUENCES; DAPHNIA-MAGNA; RESOURCE DEPRESSION; ACUTE TOXICITY; HEAVY-METALS; BODY-SIZE; COPPER; LAKE; SURVIVAL; WATER;
Keywords:
zooplankton; ionic copper; pH; toxicity; microcosms;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Gagneten, AM Univ Nacl Litoral, Fac Humanidades & Ciencias, Ciudad Univ,Paraje El Pozo,RA-3000 Santa Fe, Argentina Univ Nacl Litoral Ciudad Univ,Paraje El Pozo Santa Fe Argentina RA-3000
Citazione:
A.M. Gagneten e I. Vila, "Effects of Cu+2 and pH on the fitness of Ceriodaphnia dubia (Richard 1894)(Crustacea, Cladocera) in microcosm experiments", ENVIRON TOX, 16(5), 2001, pp. 428-438

Abstract

An important disturbance of anthropogenic origin frequently occurring in freshwater ecosystems is a rise in the concentration of heavy metals in solution, among which copper stands out due to its known toxicity. However, thestudy of the chemical behavior of copper in solution is highly dependent on pH. In this study, the effect of ionic copper on the fitness of Ceriodaphnia dubia was assessed in microcosm experiments under different conditions of Cu+2 and pH. Two groups of experiments were conducted: effects on survival and fecundity, and effects on population dynamics. In the former, both pH and copper concentrations were manipulated. On the other hand, only the concentration ofbiologically available ionic copper was manipulated whereas pH was maintained constant in the population dynamics experiments. There was an agreementbetween both sets of experiments in terms of their results, showing important toxic effects of copper as evidenced through significant differences between controls and treatments in survival and fecundity. Mean age of first reproduction was delayed, and both the number of neonates produced per female and number of broods decreased with the increase in the concentration ofcopper. R-o was always lower at pH 6 than at pH 8 and was negatively related to the increment in the concentration of copper under either pH. A significant effect on population dynamics at 5 mug l(-1) of copper sulfate was found and the extinction of the population at 20 mug l(-1) of copper sulfate. New values of toxicity from copper are proposed, and the potential effects that an increment in copper could have on the communities that occupy a central position in aquatic food webs are discussed. (C) 2001 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 10:28:37