Trace metal anomalies in bleached Porites coral at Meiji Reef, tropical South China Sea

Shu Li; Kefu Yu; Jianxin Zhao; Yuexing Feng; Tianran Chen

doi:10.1007/s00343-016-5234-7

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Trace metal anomalies in bleached Porites coral at Meiji Reef, tropical South China Sea

Updated：2023-05-16

- Trace metal anomalies in bleached Porites coral at Meiji Reef, tropical South China Sea
- Journal of Oceanology and Limnology Vol. 35, Issue 1, Pages: 115-121(2017)
- Affiliations：
  
  1. Key laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences
  2. Radiogenic Isotope Laboratory School of Earth Sciences The University of Queensland
- Author bio：
- Funds：
- DOI：10.1007/s00343-016-5234-7
  CLC：
- Online First：21 April 2016，
  
  Published：2017
- Accepted：
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Li, S., Yu, K., Zhao, J. et al. Trace metal anomalies in bleached Porites coral at Meiji Reef, tropical South China Sea., Chin. J. Ocean. Limnol. 35, 115–121 (2017). https://doi.org/10.1007/s00343-016-5234-7
DOI：

Li, S., Yu, K., Zhao, J. et al. Trace metal anomalies in bleached Porites coral at Meiji Reef, tropical South China Sea., Chin. J. Ocean. Limnol. 35, 115–121 (2017). https://doi.org/10.1007/s00343-016-5234-7 DOI：

摘要

Abstract

Coral bleaching has generally been recognized as the main reason for tropical coral reef degradation

but there are few long-term records of coral bleaching events. In this study

trace metals including chromium (Cr)

copper (Cu)

molybdenum (Mo)

manganese (Mn)

lead (Pb)

tin (Sn)

titanium (Ti)

vanadium (V)

and yttrium (Y)

were analyzed in two Porites corals collected from Meiji Reef in the tropical South China Sea (SCS) to assess differences in trace metal concentrations in bleached compared with unbleached coral growth bands. Ti

and Mo generally showed irregular fluctuations in both corals. Bleached layers contained high concentrations of Mn

and Pb. Unbleached layers showed moderately high concentrations of Mn and Cu only. The different distribution of trace metals in Porites may be attributable to different selectivity on the basis of vital utility or toxicity. Ti

and Mo are discriminated against by both coral polyps and zooxanthellae

but Mn

and Pb are accumulated by zooxanthellae and only Mn and Cu are accumulated by polyps as essential elements. The marked increase in Cu

and Sn are associated with bleaching processes

including mucus secretion

tissue retraction

and zooxanthellae expulsion and occlusion. Variation in these trace elements within the coral skeleton can be used as potential tracers of short-lived bleaching events.

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references

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