Effects of copper on life-history traits of Daphnia pulex and Bosmina longirostris

Koivisto, Sanna; Ketola, Martti

doi:10.1016/0166-445x(94)00094-7

Cited by 42 publications

(23 citation statements)

References 53 publications

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“…Likewise, Meyer et al (1987) investigated Daphnia pulex's response to toxic levels of copper and cadmium, and found that population growth rate was not more responsive than any of the individual life-cycle parameters. Koivisto and Ketola (1995) reported similar results for Daphnia pulex exposed to copper in which significant effects on maturation time did not affect the population growth rate significantly. Another study by Pesch (1991) examined the effects of contaminated harbor sediment on the polychaete Neanthes arenaceodentata.…”

Section: Demographic Analysissupporting

confidence: 70%

Effects of 4-n-Nonylphenol on Life-History Traits and Population Dynamics of a Polychaete

Hansen

Forbes

Forbes³

1999

Ecological Applications

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Abstract. A Life-Table-Response Experiment lasting 78 d was performed to investigate the toxic effects of sediment-associated 4-n-nonylphenol (NP) on growth, reproduction, and survivorship of isolated hermaphrodites of the infaunal polychaete Capitella sp. I. Demographic effects were evaluated using both a fully age-classified and a simple twostage model to estimate population growth rates (). Decomposition analysis was performed to explore the contributions of each of the affected life-history traits to the effects observed on . Elasticity analysis was applied to examine the relative sensitivity of to changes in each of the different life-history traits under different exposure levels.In the lowest NP treatment (14 g NP/g dry mass of sediment) significant stimulatory effects were observed for both asymptotic body volume and average brood size, but these did not result in a significant effect on . Negative effects on brood size, volume-specific fecundity, time to first reproduction, and individual growth rate were significant in the highest NP treatment (174 g/g dry mass), and these effects resulted in a significant reduction in . Decomposition of the two-stage model indicated that the effect of NP on time to first reproduction was a major cause of changes in population growth rate. Although time to first reproduction increased by only ϳ20% in the highest NP treatment relative to the control, it was responsible for more than half (55%) of the effect on . In contrast, perindividual fecundity decreased by 75% but only explained 44% of the effect on . Elasticity analysis of the two-stage model showed that became less sensitive to changes in fecundity and time to maturity, but not to changes in juvenile and adult survival probabilities, with increasing NP exposure.In this study, population growth rate was not significantly affected by NP concentrations lower than those affecting the individual life-history traits. However, since the populationlevel consequences of changes in each trait depend on the starting value of , on the extent to which the other traits are impacted by the toxicant, and on the life-history characteristics of the species under consideration, the application of demographic analyses to chronic toxicity test results is required to link individual-level responses to population-level impacts of toxicant exposure.

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Section: Demographic Analysissupporting

confidence: 70%

Effects of 4-n-Nonylphenol on Life-History Traits and Population Dynamics of a Polychaete

Hansen

Forbes

Forbes³

1999

Ecological Applications

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“…It is known that cladocerans are able to alter energy allocation to reproduction or somatic growth depending on stress-induced situations (e.g., predation, food availability, metal exposure) (Lynch 1980;Lynch and Ennis 1983;Enserink et al 1990;Evens et al 2009). Different lifehistory strategies in different cladoceran species were also observed by Koivisto and Ketola (1995) as a consequence of copper exposure, and stimulating effects due to sublethal exposure to copper have been reported for Daphnia species (e.g., increased neck tooth length, induced growth and reproduction [Hunter and Pyle 2004;). …”

Section: Discussionmentioning

confidence: 96%

Effects of Dietary Copper on Life-History Traits of a Tropical Freshwater Cladoceran

Gusso-Choueri

Choueri

Lombardi

et al. 2011

Arch Environ Contam Toxicol

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Life-history parameters of Ceriodaphnia cornuta (Cladocera: Daphniidae) fed on Pseudokirchneriella subcapitata (Chlorophyceae) exposed to different copper concentrations were investigated. C. cornuta individuals were reared in four treatments: (a) reconstituted water and non-contaminated algae (RW); (b) reconstituted water and copper-contaminated algae with either 1.28 × 10(-13) (10(-7)Cu) or (c) 1.93 × 10(-13) g Cu cell(-1) (10(-6)Cu); and (d) natural water from a local reservoir and non-contaminated algae (NW). Copper content in C. cornuta individuals increased as diet-borne exposure increased (RW < 10(-7)Cu < NW < 10(-6)Cu), except for NW individuals, which exhibited higher copper body burden than RW and 10(-7)Cu individuals, suggesting that some copper was available in the natural water. The results suggest that subacute levels of dietary copper stimulated C. cornuta's growth and reproduction, whereas organisms reared on reconstituted water showed nutritional deficiency. Depending on copper exposure concentration, either growth (lower Cu concentration) or reproduction (higher Cu concentration) was further stimulated, suggesting that an alteration of resource allocation is involved in diet-borne copper exposure. Because differences among treatments were only significantly different after day 12 of the experiment, our results reinforce that full life-cycle tests are more appropriate than the standard 7 day or three-brood chronic bioassays used to evaluate dietary copper effects at low, chronic copper inputs and that the use of standard test-organisms may not address site-specific situations for tropical environments.

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“…Además, su facilidad de medición los constituyen herramientas complementarias de gran potencial para futuros estudios ecotoxicológicos. Finalmente, los análisis a nivel poblacional han ponderado el empleo del indicador r (tasa intrínseca de crecimiento natural) por la capacidad integradora de diversos parámetros biológicos en estudios de ciclo de vida (Coniglio & Baudo 1989, Koivisto & Ketola 1995, Forbes & Calow, 1999. Pese a haber sido cuestionado por algunos autores (Allan 1976, Janssen et al 1994, este indicador es altamente confiable y es utilizado en estudio para evaluar los efectos directos de los metales y otros contaminantes.…”

Section: Diseños Experimentales Y Avances Metodológicos En Estudios Dunclassified

Effects of metals on freshwater microcrustaceans. Metodological advances and potentiality of cladocerans and copepods as test organisms

Gutiérrez

Gagnetén

2011

Rev peru biol

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ResumenEl incremento de los metales en los cuerpos de agua dulce a causa de las actividades antropogénicas genera importantes alteraciones sobre la biota. Esta revisión analiza los efectos adversos de varios metales de relevancia ecotoxicológica sobre los microcrustáceos zooplanctónicos (cladóceros y copépodos), los avances experimentales en esta línea y las ventajas de cada grupo como organismos test. En general, la necesidad de obtener indicadores más sensibles y representativos que los tradicionales, promovió lineamientos hacia estudios subcrónicos, interspecíficos y multigeneracionales. Por otra parte, la tendencia actual hacia el estudio de mezclas de sustancias y los efectos indirectos permite adquirir una visión más integral del problema. El impacto sobre las poblaciones es muy variable, dependiendo de la naturaleza del metal, las características del medio, el tiempo de exposición, las condiciones de cultivo y aspectos genéticos. Sin embargo, la mayoría de los trabajos se centran en pocas especies, dejando vacancias en el conocimiento de las representantes de cada región particular. Si bien algunos atributos de los cladóceros y copépodos como el tamaño, la morfología y el rol ecológico los tornan buenos indicadores, las diferencias en el desarrollo, reproducción y estrategias de perpetuación confieren ventajas a un grupo sobre otro.Palabras clave: ecotoxicología; metales; microcrustáceos zooplanctónicos; diseños experimentales. AbstractThe increase of metals in fresh water systems due to anthropogenic activities cause important alterations on the biota. The present review analyze the adverse effects of various metals of ecotoxicological relevance on microcrustaceans zooplankton species (cladocerans and copepods), the experimental advances and the advantages of each group as test organisms. In general, the need to obtain more sensitive and representative indicators than the tradicional ones leads to subchronic, interespecific and multigenerational studies. Additionally, the analysis of mixtures as well as their indirect effects allows to acquire more integral knowledges of the impact of contaminants. The toxic effects are different, depending on the nature of metals, the physicochemical characteristics of the water, exposutre time and genetic traits. However, most works are focused on few species, leading vacant areas on the knowledge of the representatives of every particular region. Despite some cladocerans and copepods atributes make them good bioindicators (size, morphology and ecological role), differences of development, reproduction and perpetuation strategies bring advantages to one group on another.Keyword: ecotoxicology metals zooplanktonic microcrustaceans; experimental designs. IntroducciónLos metales constituyen componentes comunes de la litosfera y forman parte de numerosos ciclos biológicos y geológicos naturales. No obstante, se ha demostrado que la creciente industrialización y actividades agrícolas suelen generar importantes modificaciones en estos ciclos, causando el incremento de las co...

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Effects of copper on life-history traits of Daphnia pulex and Bosmina longirostris

Cited by 42 publications

References 53 publications

Effects of 4-n-Nonylphenol on Life-History Traits and Population Dynamics of a Polychaete

Effects of 4-n-Nonylphenol on Life-History Traits and Population Dynamics of a Polychaete

Effects of Dietary Copper on Life-History Traits of a Tropical Freshwater Cladoceran

Effects of metals on freshwater microcrustaceans. Metodological advances and potentiality of cladocerans and copepods as test organisms

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