Comparison of metals levels in two mangrove species (Rhizophora stylosa and Sonneratia hainanensis) from Hainan Island, South China

Trace metals in mangrove tissues (leaf, branch and root) of two species (Rhizophora stylosa and Sonneratia hainanensis) from Dongzhai Harbor and Sanya Bay of Hainan Island were studied. The total average concentrations of Cu, Pb, Zn, Cd, Cr, Hg and As in the two mamgrove species were 2.4±1.3, 1.1±0....

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2017-01, Vol.52 (1), p.12050
Main Authors: Qiu, Y W, Qiu, H L
Format: Article
Language:English
Subjects:
Bioaccumulation
Bioindicators
Biota
Cadmium
Chromium
Copper
Enrichment
Indicator species
Lead
Leaves
Mangroves
Mercury
Mercury (metal)
Metal concentrations
Rhizophora stylosa
Sediments
Sonneratia
Tissues
Trace metals
Zinc
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Summary:Trace metals in mangrove tissues (leaf, branch and root) of two species (Rhizophora stylosa and Sonneratia hainanensis) from Dongzhai Harbor and Sanya Bay of Hainan Island were studied. The total average concentrations of Cu, Pb, Zn, Cd, Cr, Hg and As in the two mamgrove species were 2.4±1.3, 1.1±0.7, 7.8±8.0, 0.03±0.05, 1.4±1.6, 0.03±0.01 and 0.2±0.2 µg g-1 dw, respectively. Metals concentrations among different tissues of mangroves showed different pattern. In general, Zn, Cd and Hg were slightly enriched in leaf, Cu, Pb and As was enriched in root, and Cr were enriched in branch. Metals levels in R. stylosa and S. hainanensis from both Dongzhai Harbor and Sanya Bay were compared, which suggested that different mangrove species have their unique mechanism to bioaccumulate metals and TOC in the mangrove sediment could be one of the important factors for regulating metals in mangrove tissues. The biota-sediment accumulation factors (BSAF) of metals in mangrove tissues were calculated. The distribution of metals concentrations in mangrove tissues against metals levels in sediment demonstrated that mangrove leaves could be employed as a bio-indicator for some metals (Cu, Zn, Cd and Hg) with temporal monitoring.
ISSN:1755-1307
1755-1315
DOI:10.1088/1742-6596/52/1/012050