Bioremediation efficiency of Palmaria palmata and Ulva lactuca for use in a fully recirculated cold-seawater naturalistic exhibit: effect of high NO3 and PO4 concentrations and temperature on growth and nutrient uptake

The bioremediation capacities of Palmaria palmata and Ulva lactuca for removing dissolved nutrients in a cold-seawater fully recirculated ecosystemic representation of an estuarine aquatic habitat were evaluated. The seaweeds were cultured in the laboratory based on environmental conditions observed...

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Bibliographic Details
Published in:Journal of applied phycology 2018-04, Vol.30 (2), p.1295-1304
Main Authors: Tremblay-Gratton, A., Boussin, J.-C., Tamigneaux, É., Vandenberg, G. W., Le François, Nathalie R.
Format: Article
Language:English
Subjects:
Algae
Aquaria
Aquariums
Aquatic habitats
Biomedical and Life Sciences
Bioremediation
Brackishwater environment
Carbon/nitrogen ratio
Chemical analysis
Ecology
Environmental conditions
Estuaries
Estuarine environments
Freshwater & Marine Ecology
Growth rate
Habitats
Life Sciences
Marine ecosystems
Mineral nutrients
Nitrates
Nutrient concentrations
Nutrient enrichment
Nutrient uptake
Nutrients
Palmaria palmata
Phosphates
Plant Physiology
Plant Sciences
Seawater
Seaweeds
Temperature
Temperature effects
Tissue
Ulva lactuca
Uptake
Water analysis
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Summary:The bioremediation capacities of Palmaria palmata and Ulva lactuca for removing dissolved nutrients in a cold-seawater fully recirculated ecosystemic representation of an estuarine aquatic habitat were evaluated. The seaweeds were cultured in the laboratory based on environmental conditions observed in a large-scale aquarium representing the marine ecosystem of the Gulf of Saint-Lawrence (Québec, Canada), i.e., salinity of 24 PSU, 5 and 10 °C, and under three combinations of high nitrate (NO 3 − ) and phosphate (PO 4 3− ) concentrations (2865:195, 3570:242, and 4284: 291 μM). Neither nutrient levels nor temperature significantly changed nitrate and phosphate uptake rates (0.65 ± 0.15 and 1.76 ± 0.59 mg N gDW −1  day −1 and 0.14 ± 0.11 and 0.32 ± 0.21 mg P gDW −1  day −1 for P. palmata and U. lactuca , respectively). Growth rate of P. palmata was independent of temperature and nutrient concentrations with a mean of 0.64 ± 0.18% FW day −1 . Ulva lactuca expressed its highest growth rate (2.81 ± 0.72% FW day −1 ) at 10 °C and intermediate nutrient concentration. C/N ratio was
ISSN:0921-8971
1573-5176
DOI:10.1007/s10811-017-1333-x