Diving associated coral breakage in Hong Kong: Differential susceptibility to damage

Alfred Cheuk-sun Au, Liye Zhang, Shan-Shan Chung*, Jian-Wen Qiu*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

31 Citations (Scopus)
16 Downloads (Pure)


We conducted the first quantitative assessment of coral breakage along a gradient of diving activities in Hong Kong, the most densely populated city in southern China. A survey of six 1 × 25 m transects at seven sites revealed a total of 81 broken corals, among which 44% were branching, 44% plate-like and 12% massive. There were 3-19 broken colonies per site. At most study sites, the percentage of broken corals exceeded the recommended no-action threshold of 4%, suggesting that management intervention is justified. There was a significant positive correlation between the number of broken coral colonies and the number of divers visiting the site. The branching Acropora and the plate-like Montipora suffered from much higher frequency of damage than their relative abundance, raising the concern that the cumulative impact of such differential susceptibility to breakage may affect coral community composition.

Original languageEnglish
Pages (from-to)789-796
Number of pages8
JournalMarine Pollution Bulletin
Issue number2
Early online date24 Jan 2014
Publication statusPublished - Aug 2014

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Coral breakage
  • Coral damage
  • Coral management
  • Coral morphology
  • Impact of diving
  • Sustainability


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