Accumulation of trace metal elements (Cu, Zn, Cd, and Pb) in surface sediment via decomposed seagrass leaves: A mesocosm experiment using zostera marina L

Shinya Hosokawa, Susumu Konuma, Yoshiyuki Nakamura

抄録

Accumulation of Cu, Zn, Cd, and Pb in the sediment of seagrass ecosystems was examined using mesocosm experiments containing Zostera marina (eelgrass) and reference pools. Lead was approximately 20-fold higher in the surface sediment in the eelgrass pool than in eelgrass leaves and epiphytes on the eelgrass leaves, whereas zinc and cadmium were significantly lower in the surface sediment than in the leaves, with intermediate concentrations in epiphytes. Copper concentrations were similar in both the surface sediment and leaves but significantly lower in epiphytes. Carbon and nitrogen contents increased significantly with increasing δ13C in surface sediments of both the eelgrass and reference pools. Copper, Zn, Cd, and Pb also increased significantly with increasing δ13C in the surface sediment in the eelgrass pool but not in the reference pool. By decomposition of eelgrass leaves with epiphytes, which was examined in the eelgrass pool, copper and lead concentrations increased more than 2-fold and approximately a 10-fold, whereas zinc and cadmium concentrations decreased. The high copper and lead concentrations in the surface sediment result from accumulation in decomposed, shed leaves, whereas zinc and cadmium remobilized from decomposed shed leaves but may remain at higher concentrations in the leaves than in the original sediments. The results of our mesocosm study demonstrate that whether the accumulation or remobilization of trace metals during the decomposition of seagrass leaves is trace metal dependent, and that the decomposed seagrass leaves can cause copper and lead accumulation in sediments in seagrass ecosystems.

本文言語英語
文献番号e0157983
ジャーナルPLoS One
11
6
DOI
ジャーナル掲載日出版済み - 2016 6 1

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Trace Elements
Copper
Metals
Cadmium
Zinc
Ecosystem
Lead
Zosteraceae
Nitrogen
Carbon

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

これを引用

Accumulation of trace metal elements (Cu, Zn, Cd, and Pb) in surface sediment via decomposed seagrass leaves : A mesocosm experiment using zostera marina L. / Hosokawa, Shinya; Konuma, Susumu; Nakamura, Yoshiyuki.

:: PLoS One, 巻 11, 番号 6, e0157983, 01.06.2016.

研究成果: ジャーナルへの寄稿記事

Hosokawa, Shinya; Konuma, Susumu; Nakamura, Yoshiyuki / Accumulation of trace metal elements (Cu, Zn, Cd, and Pb) in surface sediment via decomposed seagrass leaves : A mesocosm experiment using zostera marina L.

:: PLoS One, 巻 11, 番号 6, e0157983, 01.06.2016.

研究成果: ジャーナルへの寄稿記事

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