Differential effects of copper on three species of scleractinian corals and their algal symbionts (Symbiodinium spp.)

G. K. Bielmyer, Martin Grosell, R. Bhagooli, Andrew C Baker, Chris Langdon, P. Gillette, T. R. Capo

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Land-based sources of pollution have been identified as significant stressors linked to the widespread declines of coral cover in coastal reef ecosystems over the last 30 years. Metal contaminants, although noted as a concern, have not been closely monitored in these sensitive ecosystems, nor have their potential impacts on coral-algal symbioses been characterized. In this study, three species of laboratory-reared scleractinian corals, Acropora cervicornis, Pocillopora damicornis, and Montastraea faveolata each containing different algal symbionts (Symbiodinium A3, C1 and D1a, respectively) were exposed to copper (ranging from 2 to 20 μg/L) for 5 weeks. At the end of the exposure period, copper had accumulated in the endosymbiotic dinoflagellate ("zooxanthellae") and animal tissue of A. cervicornis and the animal tissue of M. faveolata; however, no copper accumulation was detected in the zooxanthellae or animal tissue of P. damicornis. The three coral species exhibited significantly different sensitivities to copper, with effects occurring in A. cervicornis and P. damicornis at copper concentrations as low as 4 μg/L. Copper exposure affected zooxanthellae photosynthesis in A. cervicornis and P. damicornis, and carbonic anhydrase was significantly decreased in A. cervicornis and M. faveolata. Likewise, significant decreases in skeletal growth were observed in A. cervicornis and P. damicornis after copper exposure. Based on preliminary results, no changes in Symbiodinium communities were apparent in response to increasing copper concentration. These results indicate that the relationships between physiological/toxicological endpoints and copper accumulation between coral species differ, suggesting different mechanisms of toxicity and/or susceptibility. This may be driven, in part, by differences in the algal symbiont communities of the coral species in question.

Original languageEnglish
Pages (from-to)125-133
Number of pages9
JournalAquatic Toxicology
Volume97
Issue number2
DOIs
StatePublished - Apr 15 2010

Fingerprint

Anthozoa
Symbiodinium
symbiont
symbionts
Copper
coral
copper
corals
animal tissues
Ecosystem
animal
Scleractinia
effect
Dinoflagellida
Carbonic Anhydrases
Symbiosis
ecosystems
ecosystem
carbonate dehydratase
Photosynthesis

Keywords

  • Coral
  • Metal
  • Toxicity

ASJC Scopus subject areas

  • Aquatic Science
  • Health, Toxicology and Mutagenesis

Cite this

Differential effects of copper on three species of scleractinian corals and their algal symbionts (Symbiodinium spp.). / Bielmyer, G. K.; Grosell, Martin; Bhagooli, R.; Baker, Andrew C; Langdon, Chris; Gillette, P.; Capo, T. R.

In: Aquatic Toxicology, Vol. 97, No. 2, 15.04.2010, p. 125-133.

Research output: Contribution to journalArticle

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