Effects of copper addition to laboratory maintained microcosms of Presidente Calles Reservoir organisms (Aguascalientes, Mexico)

Rico‐Martínez, Roberto; Pérez‐Legaspi, Ignacio Alejandro; Quintero-Díaz, Gustavo Ernesto; Rodrı́guez-Martı́nez, Miriam G.; Hernández-Rodríguez, Miguel Ángel; Zaragoza-Almaraz, Juan E.

doi:10.1016/s1463-4988(98)00030-x

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Adicionalmente, no se puede descartar que las diferentes especies liberen metabolitos tóxicos que tengan efecto sobre las otras, o que modifiquen las condiciones ambientales del sistema como el oxígeno disuelto, pH y nitrógeno total, entre otros. Rico Martínez et al (1998) observaron reducción en la densidad de población y diversidad de especies de rotíferos al exponerlos a Cu en microcosmos, posiblemente debido a cambios ambientales ocasionados por las mismas especies en el sistema. Otro trabajo que apoya esta hipótesis es RESUMEN En los cuerpos acuáticos la disponibilidad de los tóxicos es limitada por las características fisicoquímicas de los sedimentos y agua, así como por las interacciones entre los diversos xenobióticos y entre las especies que los habitan.…”

Section: Discussionunclassified

Efecto de sedimentos naturales enriquecidos con zinc, en modelos aislados y en microcosmos, sobre tres especies de invertebrados bentónicos

Galár-Martínez¹,

Martínez‐Tabche²,

Sánchez-Hidalgo³

et al. 2014

RBT

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Effect of zinc-enriched sediments, in open and isolated systems, on three species of benthonic invertebrates. Availability of toxics in aquatic bodies is limited by the physicochemical characteristics of sediments and water, as well as by the interactions between the different xenobiotics and inhabits species. The aim of this work was to relate the effect produced by zinc (Zn) spiked in sediments of the Ignacio Ramírez dam (PIR), in isolated and microcosms models, on ATP concentration of three benthic organisms with the metal biodisponibility. The selected species were a crustacean, an annelid and a mollusk: Hyalella azteca (Amphipoda: Hyalellidae), Limnodrilus hoffmeisteri (Oligochaeta: Tubificidae) and Stagnicola attenuata (Basommatophora: Lymnaeidae), species that are found at high proportions in the reservoir and use different spaces in the benthos. Samples of sediments and organisms were collected from the PIR during the dry season (February of 1999). Metal concentration (Zn, Fe, Cu and Ni), pH, texture, particle size, total nitrogen and organic matter were determined in sediments. Sublethal studies were carried out using two types of static systems (organisms isolated and in microcosms). Both models contained PIR sediments enriched with Zn (nominal concentration of 0.8129 mg/kg) and synthetic water in a proportion of 1:4. The test organisms were added to the systems once the equilibrium was reached (2 hr) considering the biomass quantity with respect to volume (1.0 g of organism by each 100 ml of water:sediment). After 0, 12, 24, 36, 48 and 72 hr of exposure, samples of sediment and hydrobionts were taken, and Zn content was quantified by atomic absorption. ATP concentration was also determined in organisms. The effect produced by natural sediments spiked with Zn is increased by the presence of more than one specie in the system (microcosm). With respect to Zn levels, two of the organisms tend to lose this metal in isolated and microcosm models, probably as a regulation strategy in its accumulation, as well as Fe presence in the reservoir sediments. Therefore, H. azteca maintained a constant Zn levels during the whole experiment. It is possible that the caption rate is so low in this organism that it does not need another regulatory mechanism. A decrement in ATP in worms and amphipods was observed in both systems at all exposure times. Possibly Zn and other metals present in the sediments interfere with the energy production enzymes by binding to SH groups. Nevertheless this biomolecule increased in snails in microcosms at all exposure times and in isolated systems at the end of the experiment, probably due to compensatory mechanisms and reduction in energy consumption present in mollusks during heavy metals exposure.

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Section: Discussionunclassified

Efecto de sedimentos naturales enriquecidos con zinc, en modelos aislados y en microcosmos, sobre tres especies de invertebrados bentónicos

Galár-Martínez¹,

Martínez‐Tabche²,

Sánchez-Hidalgo³

et al. 2014

RBT

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Interaction among copper toxicity, temperature and salinity on the population dynamics of Brachionus rotundiformis (Rotifera)

Gama-Flores

Sarma

2005

Rotifera X

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Interaction Among Copper Toxicity, Temperature and Salinity on the Population Dynamics of Brachionus Rotundiformis (Rotifera)

2005

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Heavy metals may interact with ecological factors such as temperature, food level and salinity, causing both mortality and reduced reproduction in organisms. Among different heavy metals, copper compounds are commonly used for eliminating algal blooms in aquaculture tanks. At certain concentrations, copper is toxic to rotifers. In the present work, we evaluated the combined effects of salt concentrations (2.5 and 5.0 g l )1 NaCl), copper levels (0, 0.03125, 0.0625, 0.125 and 0.25 mg l )1 as CuCl 2 ) and two temperatures (20 and 25°C) on the population growth of B. rotundiformis using Chlorella as the algal food (at 0.5 · 10 6 cells ml )1 for every 24 h). Regardless of salinity and temperature, copper at concentrations as low as 0.03 mg l )1 had an adverse effect on the population growth of rotifers and above 0.125 mg l )1 , the populations did not grow. The effect of the toxicant on B. rotundiformis was more severe at 25°t han at 20°C at lower salinity. In general, we observed peak densities of rotifers around day 12 at 20°C but 6-8 days earlier at 25°C. Peak population densities of B. rotundiformis in the controls at the salinity of 2.5 g l )1 ranged from 90 to 180 ind. ml )1 , depending on temperature; at a salinity of 5.0 g l )1 , these were lower. The population growth rates, r, in our study varied from +0.31 to -0.12 depending on the test conditions. There was a significant impact of temperature, salinity and toxicity level on the population growth rate of B. rotundiformis. Our results suggested that even narrow changes in salinity could negatively influence the toxicity of heavy metal on the population growth rates of B. rotundiformis.

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Effects of copper addition to laboratory maintained microcosms of Presidente Calles Reservoir organisms (Aguascalientes, Mexico)

Cited by 4 publications

References 10 publications

Efecto de sedimentos naturales enriquecidos con zinc, en modelos aislados y en microcosmos, sobre tres especies de invertebrados bentónicos

Efecto de sedimentos naturales enriquecidos con zinc, en modelos aislados y en microcosmos, sobre tres especies de invertebrados bentónicos

Interaction among copper toxicity, temperature and salinity on the population dynamics of Brachionus rotundiformis (Rotifera)

Interaction Among Copper Toxicity, Temperature and Salinity on the Population Dynamics of Brachionus Rotundiformis (Rotifera)

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