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:: Volume 11, Issue 1 (Spring 2019) ::
3 2019, 11(1): 55-62 Back to browse issues page
Chronic and acute effects of nickel and cobalt on chlorophyll a and carotenoids of marine micro algae Nannochloropsis oculata
Abstract:   (139 Views)
Algae are among the aquatic organisms that are severely exposed to increasing levels of pollutants, which are becoming a concern in marine ecosystems. Heavy metals are among the compounds for which their increase in high levels causes problems in the structure of algae communities in aquatic ecosystems. In this study, the effect of different concentrations of Nickel (1.5, 3, 4, 6, 8, 12, 15 mg/l) and cobalt (1.5, 2, 3, 5, 6, 8, 10 mg/l) on chlorophyll a and the carotenoid level of microalga Nannochloropsis oculata was investigated for 72 hours. The EC50 of nickel and cobalt were determined according to the OECD 2011 protocol. The results of acute tests showed that EC50 of nickel and cobalt was 6.5 mg/l and 5.3 mg/l, respectively. Overall, the results of this study showed that nickel caused toxicity in higher concentrations compared to cobalt. Furthermore, nickel and cobalt heavy metals significantly inhibited the growth and reproduction of N. oculata. However, these heavy metals had lower effect on ceratoid contents.
Keywords: Heavy metals, EC50, Chlorophyll a, Carotenoid, Nannochloropsis oculata
Full-Text [PDF 149 kb]   (20 Downloads)    
Type of Study: Research | Subject: Fisheries
Received: 2019/06/4 | Accepted: 2019/06/4 | Published: 2019/06/4
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Chronic and acute effects of nickel and cobalt on chlorophyll a and carotenoids of marine micro algae Nannochloropsis oculata. 3. 2019; 11 (1) :55-62
URL: http://jmb.iauahvaz.ac.ir/article-1-727-en.html


Volume 11, Issue 1 (Spring 2019) Back to browse issues page
مجله علمی پژوهشی زیست شناسی دریا Journal of Marine Biology
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