Trace elements (Cu, Zn, and Hg) and δ13C/δ15N in seabird subfossils from three islands of the South China Sea and its implications.

Publisher: Springer Country of Publication: Netherlands NLM ID: 8508350 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1573-2959 (Electronic) Linking ISSN: 01676369 NLM ISO Abbreviation: Environ Monit Assess Subsets: MEDLINE

Publication: 1998- : Dordrecht : Springer
Original Publication: Dordrecht, Holland ; Boston : D. Reidel Pub. Co., c1981-

Birds* ; Environmental Monitoring* ; Fossils*; Environmental Pollution/*statistics & numerical data ; Metals, Heavy/*analysis; Animals ; China ; Copper/analysis ; Feces/chemistry ; Islands ; Isotopes/analysis ; Mercury/analysis ; Trace Elements/analysis ; Zinc/analysis

Seabird subfossils were collected on three islands of the Xisha Archipelago, South China Sea. Via elemental analysis, we identified that bird guano was a significant source for heavy metals Cu, Zn, and Hg. Cu and Zn levels in these guano samples are comparable to their levels in wildbird feces, but guano Hg was lower than previously reported. Trophic positions significantly impacted transfer efficiency of heavy metals by seabirds. Despite of a common source, trace elements, as well as stable isotopes (i.e., guano δ(13)C and collagen δ(15)N), showed island-specific characteristics. Bird subfossils on larger island had relatively greater metal concentrations and revealed higher trophic positions. Partition of element and isotope levels among the islands suggested that transfer efficacy of seabirds on different islands was different, and bird species were probably unevenly distributed among the islets. Island area is possibly a driving factor for distributions of seabird species.

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Keywords: Biovector; Guano; Heavy metals; Seabird; South China Sea; Stable isotope

0 (Isotopes)
0 (Metals, Heavy)
0 (Trace Elements)
789U1901C5 (Copper)
FXS1BY2PGL (Mercury)
J41CSQ7QDS (Zinc)

Date Created: 20160409 Date Completed: 20160923 Latest Revision: 20181202

20231215

10.1007/s10661-016-5274-7

27056479