Metal to phosphorus stoichiometries for freshwater phytoplankton in three remote lakes

Research output: Contribution to journalArticle

Abstract

Simultaneous measurements of changes in phytoplankton biomass and the metal and phosphorus (P) content of cells have been captured to attest to metal to P stoichiometries for freshwater phytoplankton. Three Scottish lakes that had received high, medium or low metal contamination from the atmosphere were selected for study. Phytoplankton cells were collected and Inductively Coupled Plasma -Mass Spectrometry was used to measure their lead (Pb), cadmium (Cd), mercury (Hg), copper (Cu), zinc (Zn), nickel (Ni), chromium (Cr), manganese (Mn), cobalt (Co) and P content. Increased phytoplankton growth in the lakes resulted in significant algae growth dilution of the mass -specific Pb, Cd, Hg, Cu, Ni and Cr in the phytoplankton. Changes in the phytoplankton cell count and their Hg, Pb, Cd, Cu, Mn, Co, Ni and Cr concentrations showed the process of algae bloom dilution to be subject to exponential decay, which accelerated in the order of Mn <Cu <Ni <Pb and Cd <Cr and Hg <Co. This indicated a metabolic and detoxification mechanism was involved in the active selection of metals. For the first time simultaneous measurements of metals and P stoichiometry in freshwater phytoplankton are reported. The mean metal to P stoichiometry generated was (C106P1N16)(1000)Pb0.019Hg0.00004.CU0.013 Cd-0.005 Cr0.2CO0.0008 Mn0.2Ni0.012 based on field measurements and the Redfield average C, N and P stoichiometry of (CH2O)(106)(NH3)(16)H3PO4.
LanguageEnglish
JournalPeerJ
Volume4
Early online date20 Dec 2016
DOIs
Publication statusE-pub ahead of print - 20 Dec 2016

Fingerprint

stoichiometry
phytoplankton
phosphorus
cadmium
metal
lake
chromium
nickel
cobalt
manganese
dilution
alga
detoxification
algal bloom
mass spectrometry
zinc
copper
plasma
atmosphere
biomass

Keywords

  • Metal
  • Phytoplankton
  • Phosphorus
  • Freshwater
  • Lakes
  • Stoichiometries
  • Scotland

Cite this

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abstract = "Simultaneous measurements of changes in phytoplankton biomass and the metal and phosphorus (P) content of cells have been captured to attest to metal to P stoichiometries for freshwater phytoplankton. Three Scottish lakes that had received high, medium or low metal contamination from the atmosphere were selected for study. Phytoplankton cells were collected and Inductively Coupled Plasma -Mass Spectrometry was used to measure their lead (Pb), cadmium (Cd), mercury (Hg), copper (Cu), zinc (Zn), nickel (Ni), chromium (Cr), manganese (Mn), cobalt (Co) and P content. Increased phytoplankton growth in the lakes resulted in significant algae growth dilution of the mass -specific Pb, Cd, Hg, Cu, Ni and Cr in the phytoplankton. Changes in the phytoplankton cell count and their Hg, Pb, Cd, Cu, Mn, Co, Ni and Cr concentrations showed the process of algae bloom dilution to be subject to exponential decay, which accelerated in the order of Mn <Cu <Ni <Pb and Cd <Cr and Hg <Co. This indicated a metabolic and detoxification mechanism was involved in the active selection of metals. For the first time simultaneous measurements of metals and P stoichiometry in freshwater phytoplankton are reported. The mean metal to P stoichiometry generated was (C106P1N16)(1000)Pb0.019Hg0.00004.CU0.013 Cd-0.005 Cr0.2CO0.0008 Mn0.2Ni0.012 based on field measurements and the Redfield average C, N and P stoichiometry of (CH2O)(106)(NH3)(16)H3PO4.",
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Metal to phosphorus stoichiometries for freshwater phytoplankton in three remote lakes. / Douglas, Richard.

In: PeerJ, Vol. 4, 20.12.2016.

Research output: Contribution to journalArticle

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AB - Simultaneous measurements of changes in phytoplankton biomass and the metal and phosphorus (P) content of cells have been captured to attest to metal to P stoichiometries for freshwater phytoplankton. Three Scottish lakes that had received high, medium or low metal contamination from the atmosphere were selected for study. Phytoplankton cells were collected and Inductively Coupled Plasma -Mass Spectrometry was used to measure their lead (Pb), cadmium (Cd), mercury (Hg), copper (Cu), zinc (Zn), nickel (Ni), chromium (Cr), manganese (Mn), cobalt (Co) and P content. Increased phytoplankton growth in the lakes resulted in significant algae growth dilution of the mass -specific Pb, Cd, Hg, Cu, Ni and Cr in the phytoplankton. Changes in the phytoplankton cell count and their Hg, Pb, Cd, Cu, Mn, Co, Ni and Cr concentrations showed the process of algae bloom dilution to be subject to exponential decay, which accelerated in the order of Mn <Cu <Ni <Pb and Cd <Cr and Hg <Co. This indicated a metabolic and detoxification mechanism was involved in the active selection of metals. For the first time simultaneous measurements of metals and P stoichiometry in freshwater phytoplankton are reported. The mean metal to P stoichiometry generated was (C106P1N16)(1000)Pb0.019Hg0.00004.CU0.013 Cd-0.005 Cr0.2CO0.0008 Mn0.2Ni0.012 based on field measurements and the Redfield average C, N and P stoichiometry of (CH2O)(106)(NH3)(16)H3PO4.

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KW - Phytoplankton

KW - Phosphorus

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