Risk to breeding success of waterbirds by contaminants in Hong Kong: Evidence from trace elements in eggs

Chung Wah James LAM, Shinsuke TANABE, Michael H.W. LAM, Paul K.S. LAM

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Concentrations of 17 trace elements (As, Se, Rb, Sr, Ag, Sb, Cs, Tl, Pb, V, Cr, Mn, Co, Cu, Zn, Cd, and Hg) were determined in eggs of little egrets (Egretta garzetta), black-crowned night herons (Nycticorax nycticorax) and bridled terns (Sterna anaethetus) from northwestern and northeastern coastal areas of Hong Kong. Results indicated significant differences among the three species. Eggs of little egrets and black-crowned night herons appeared to be good bioindicators for monitoring selected elements (As, Pb, Zn Cr, Cu, and V) due to consistent correlations between metal concentrations in eggs and those in coastal marine sediments. Based on limited toxicological information, the predicted no effect concentrations (PNECs) of Hg and Se in the bird eggs were estimated as 0.5 to 1.8 and 0.90 to 1.45 μg g⁻¹, dry wt., respectively. Hazard quotients (HQs) indicated that Hg and Se might pose some risk to certain waterbirds in Hong Kong. Copyright © 2005 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)481-490
JournalEnvironmental Pollution
Volume135
Issue number3
DOIs
Publication statusPublished - Jun 2005

Citation

Lam, J. C. W., Tanabe, S., Lam, M. H. W., & Lam, P. K. S. (2005). Risk to breeding success of waterbirds by contaminants in Hong Kong: Evidence from trace elements in eggs. Environmental Pollution, 135(3), 481-490. doi: 10.1016/j.envpol.2004.11.021

Keywords

  • Herons
  • Egrets
  • Terns
  • Eggs
  • Trace elements
  • Risk assessment
  • Mercury
  • Selenium

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