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Combined effects of heavy metal (Hg) concentration and algal (Chlorella vulgaris) food density on the population growth of Brachionus calyciflorus (Rotifera: Brachionidae).
J Environ Biol. 2008 Mar; 29(2):139-42.JE

Abstract

The combined effects of two food levels (0.5 x 10(6) and 1.5 x 10(6) cells ml(-1) of Chlorella vulgaris) and five concentrations (0, 0.000625, 0.00125, 0.0025, 0.005 mg l(-1) of HgCl2) of mercury on the population growth of the rotifer Brachionus calyciflorus was evaluated. The growth experiments were conducted for 18 days at 23+/-1 degrees C under continuous fluorescent illumination. For each food level - heavy metal combination, we maintained 3 replicates. Our data showed that regardless of food level, increase in the heavy metal concentration in the medium resulted in decreased population growth of B. calyciflorus. At any given heavy metal concentration, B. calyciflorus grown under higher food levels had higher population abundance. The rate of population increase was significantly influenced by both the heavy metal concentration and the algal level. The highest population growth rate (0.435+/-0.003 per day) was observed in controls at 1.5 x 10(6) cells ml(-1). The results of this study were discussed in relation to the protective role of algal density against heavy metal toxicity.

Authors+Show Affiliations

Perez TR
Laboratory of Aquatic Zoology, Division of Research and Postgraduate Studies, National Autonomous University of Mexico, Campus Iztacala Los Reyes, Tlalnepantla, State of Mexico, Mexico.
Sarma SS
No affiliation info available

MeSH

AnimalsChlorella vulgarisDietFood ChainFresh WaterMercuryPopulation DensityPopulation GrowthRotiferaTime FactorsToxicity Tests, ChronicWater Pollutants, Chemical

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18831361

Citation

Perez, Teresa Ramirez, and S S S. Sarma. "Combined Effects of Heavy Metal (Hg) Concentration and Algal (Chlorella Vulgaris) Food Density On the Population Growth of Brachionus Calyciflorus (Rotifera: Brachionidae)." Journal of Environmental Biology, vol. 29, no. 2, 2008, pp. 139-42.
Perez TR, Sarma SS. Combined effects of heavy metal (Hg) concentration and algal (Chlorella vulgaris) food density on the population growth of Brachionus calyciflorus (Rotifera: Brachionidae). J Environ Biol. 2008;29(2):139-42.
Perez, T. R., & Sarma, S. S. (2008). Combined effects of heavy metal (Hg) concentration and algal (Chlorella vulgaris) food density on the population growth of Brachionus calyciflorus (Rotifera: Brachionidae). Journal of Environmental Biology, 29(2), 139-42.
Perez TR, Sarma SS. Combined Effects of Heavy Metal (Hg) Concentration and Algal (Chlorella Vulgaris) Food Density On the Population Growth of Brachionus Calyciflorus (Rotifera: Brachionidae). J Environ Biol. 2008;29(2):139-42. PubMed PMID: 18831361.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Combined effects of heavy metal (Hg) concentration and algal (Chlorella vulgaris) food density on the population growth of Brachionus calyciflorus (Rotifera: Brachionidae). AU - Perez,Teresa Ramirez, AU - Sarma,S S S, PY - 2008/10/4/pubmed PY - 2009/1/31/medline PY - 2008/10/4/entrez SP - 139 EP - 42 JF - Journal of environmental biology JO - J Environ Biol VL - 29 IS - 2 N2 - The combined effects of two food levels (0.5 x 10(6) and 1.5 x 10(6) cells ml(-1) of Chlorella vulgaris) and five concentrations (0, 0.000625, 0.00125, 0.0025, 0.005 mg l(-1) of HgCl2) of mercury on the population growth of the rotifer Brachionus calyciflorus was evaluated. The growth experiments were conducted for 18 days at 23+/-1 degrees C under continuous fluorescent illumination. For each food level - heavy metal combination, we maintained 3 replicates. Our data showed that regardless of food level, increase in the heavy metal concentration in the medium resulted in decreased population growth of B. calyciflorus. At any given heavy metal concentration, B. calyciflorus grown under higher food levels had higher population abundance. The rate of population increase was significantly influenced by both the heavy metal concentration and the algal level. The highest population growth rate (0.435+/-0.003 per day) was observed in controls at 1.5 x 10(6) cells ml(-1). The results of this study were discussed in relation to the protective role of algal density against heavy metal toxicity. SN - 0254-8704 UR - https://www.unboundmedicine.com/medline/citation/18831361/Combined_effects_of_heavy_metal__Hg__concentration_and_algal__Chlorella_vulgaris__food_density_on_the_population_growth_of_Brachionus_calyciflorus__Rotifera:_Brachionidae__ L2 - https://medlineplus.gov/mercury.html DB - PRIME DP - Unbound Medicine ER -