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Analysis of intra-thallus and temporal variability of trace elements and nitrogen in Fucus vesiculosus: Sampling protocol optimization for biomonitoring

García-Seoane, R. ; Fernández, J.A. ; Boquete, M.T. ; Aboal, J.R.

Journal of hazardous materials, 2021-06, Vol.412, p.125268, Article 125268 [Periódico revisado por pares]

Netherlands: Elsevier B.V

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  • Título:
    Analysis of intra-thallus and temporal variability of trace elements and nitrogen in Fucus vesiculosus: Sampling protocol optimization for biomonitoring
  • Autor: García-Seoane, R. ; Fernández, J.A. ; Boquete, M.T. ; Aboal, J.R.
  • Assuntos: Algae ; Aquatic pollution ; Biological Monitoring ; Environmental Monitoring ; Fucus ; Metals ; Metals, Heavy - analysis ; Nitrogen ; Seasonality ; Spain ; Trace Elements - analysis ; Water Pollutants, Chemical - analysis ; δ15N
  • É parte de: Journal of hazardous materials, 2021-06, Vol.412, p.125268, Article 125268
  • Descrição: To advance the methodological standardization of the biomonitoring technique using macroalgae, we comprehensively characterized the intra-thallus and temporal patterns of variation in concentrations of a wide set of elements (Al, As, Cd, Co, Cr, Cu, Fe, Hg, Ni, Pb, Zn, N) and δ15N signal in 6 consecutive Fucus vesiculosus apical dichotomous sections collected monthly over a four-year period (2015–2019) at 3 sites on the NW coast of Spain. The concentrations of Al, Co, Fe, Ni, Pb and Zn increased significantly from the youngest to the oldest dichotomies regardless of the sampling time and collection site; As, Cd, N and δ15N showed the opposite trend. Time series analysis revealed a significant and consistent seasonal variation of As, Cd, Co, Cu, Fe, Hg, Ni, Zn, N and δ15N concentrations, with maximum values in winter and minimum values in summer. We discussed the possible mechanisms driving these two sources of variation, and proposed an efficient and effective sampling strategy to minimize their impact in the results of biomonitoring studies, in which the part of the algal thallus selected for chemical analysis and the sampling frequency were carefully considered. This protocol will improve the conclusions and comparability of biomonitoring data from coastal environments. [Display omitted] •Sampling methodological improvement for aquatic pollutant monitoring with macroalgae.•Elemental concentrations significantly vary along the Fucus vesiculosus thallus.•Composite samples of apical sections are suitable to encompass intra-thallus variability.•Concentrations vary seasonally, with maximum peaks in winter and minimum in summer.•To represent annual concentrations: 2 subsamples collected 6-month apart and combined.
  • Editor: Netherlands: Elsevier B.V
  • Idioma: Inglês
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