Responses of the sea anemone, Exaiptasia pallida, to ocean acidification conditions and zinc or nickel exposure
| Autor: | Gretchen K. Bielmyer-Fraser, Rachel K. Thomason, Krina S. Patel, Christina G. Duckworth, Codie Richard Picariello |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Health Toxicology and Mutagenesis Oceans and Seas Glutathione reductase chemistry.chemical_element Zinc 010501 environmental sciences Aquatic Science Sea anemone 01 natural sciences Antioxidants chemistry.chemical_compound Nickel Botany Toxicity Tests Animals 0105 earth and related environmental sciences Pollutant biology Dose-Response Relationship Drug 010604 marine biology & hydrobiology Water Pollution Ocean acidification Glutathione Carbon Dioxide biology.organism_classification Catalase Glutathione Reductase Sea Anemones chemistry Environmental chemistry Carbon dioxide biology.protein Biomarkers Water Pollutants Chemical |
| Zdroj: | Aquatic toxicology (Amsterdam, Netherlands). 182 |
| ISSN: | 1879-1514 |
| Popis: | Ocean acidification, caused by increasing atmospheric carbon dioxide (CO 2 ), is a growing concern in marine environments. Land-based sources of pollution, such as metals, have also been a noted problem; however, little research has addressed the combined exposure of both pollutants to coral reef organisms. In this study we examined tissue metal accumulation and physiological effects (activity of anti-oxidant enzymes, catalase and glutathione reductase) in the sea anemone, Exaiptasia pallida after exposure to increased CO 2 , as well as zinc (Zn) or nickel (Ni). After exposure to four concentrations (nominal values = control, 10, 50, 100 μg/L) of Zn or Ni over 7 days, both metals accumulated in the tissues of E. pallida in a concentration-dependent manner. Anemones exposed to elevated CO 2 (1000 ppm) accumulated significant tissue burdens of Zn or Ni faster (by 48 h) than those exposed to the same metal concentrations at ambient CO 2 . No differences were observed in catalase activity due to Zn exposure; however, 50 μg/L Ni caused a significant increase in catalase activity at ambient CO 2 . No significant effect on catalase activity from CO 2 exposure alone was observed. Glutathione reductase activity was affected by increased Zn or Ni exposure and those effects were influenced by increased CO 2 . Results of this study provide insight into the toxic mechanisms and environmental implications of CO 2 and Zn or Ni exposure to the cnidarian E. pallida . |
| Databáze: | OpenAIRE |
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