title: Borehole density on the surface of living Porites corals as an indicator of sedimentation in Hong Kong.
abstract: Borehole density on the surface of Porites has been used as an indicator of water quality in the Great Barrier Reef. We assessed the relationship between borehole density on Porites and eight water quality parameters across 26 sites in Hong Kong. We found that total borehole densities on the surface of Porites at 16 of the studied sites were high (>1000individualsm(-2)), with polychaetes being the dominant bioeroders. Sedimentation rate was correlated positively with total borehole density and polychaete borehole density, with the latter relationship having a substantially higher correlation of determination. None of the environmental factors used were significantly correlated with bivalve borehole density. These results provide a baseline for assessing future changes in coral bioerosion in Hong Kong. This present study also indicates that polychaete boreholes can be used as a bioindicator of sedimentation in the South China Sea region where polychaetes are numerically dominant bioeroders.
authors.affiliation: Department of Biology, Hong Kong Baptist University, Hong Kong, PR China.
authors.forename: James Y
authors.initials: JY
authors.lastname: Xie
authors.affiliation: Department of Biology, Hong Kong Baptist University, Hong Kong, PR China.
authors.forename: Jane C Y
authors.initials: JC
authors.lastname: Wong
authors.affiliation: Department of Biology, Hong Kong Baptist University, Hong Kong, PR China.
authors.forename: Clement P
authors.initials: CP
authors.lastname: Dumont
authors.affiliation: The Earth Observatory of Singapore, Singapore; Asian School of the Environment, Nanyang Technological University, Singapore.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Goodkin
authors.affiliation: Department of Biology, Hong Kong Baptist University, Hong Kong, PR China. Electronic address: qiujw@hkbu.edu.hk.
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Qiu
mesh_terms: D000818:Animals; D037421:Anthozoa; D004784:Environmental Monitoring; D019015:Geologic Sediments; D006723:Hong Kong; D060753:Water Quality
keywords: Bioerosion; Bivalves; Coral health; Massive coral; Polychaetes