期刊
ENVIRONMENTAL POLLUTION
卷 255, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2019.113349
关键词
Biomonitoring; Marine pollution; Metals; Semivariogram; Spatial variability
资金
- Galician Competitive Research Group [GRC/GPC2016-002]
- CRETUS Strategic Partnership [AGRUP2015/02]
- FEDER (UE)
- Spanish Ministerio de Ciencia, Innovacion y Universidades within the Programa de Formacion de Profesorado Universitario (FPU 2014)
The aim of the present study was to optimize the protocol for sampling marine macroalgae to be used to biomonitor heavy metal contamination in marine ecosystems. For this purpose, we collected 50 subsamples of the brown seaweed Fucus vesiculosus at random in each of three sampling sites (SS) and determined the concentrations of Al, As, Cd, Co, Cr, Cu, Fe, Hg, N, Ni, Pb, Zn and delta N-15. We used semivariograms to explore the possible existence of spatial structure in the concentrations of the elements. Spatial structure was observed in 88% of the semivariograms studied, with element concentrations varying longitudinally and transversally along the SS. Using randomization techniques, we estimated that in each SS, a minimum of 30 evenly distributed subsamples should be collected within three bands parallel to the coastline (and also at different heights on the rocks if necessary), and analyzed in a single composite sample representative of the intra-SS variability. (C) 2019 Elsevier Ltd. All rights reserved.
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