Physiological and ecological performance differs in four coral taxa at a volcanic carbon dioxide seep

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
J StrahlKatharina E Fabricius

Abstract

Around volcanic carbon dioxide (CO2) seeps in Papua New Guinea, partial pressures of CO2 (pCO2) approximate those as predicted for the end of this century, and coral communities have low diversity and low structural complexity. To assess the mechanisms for such community shifts in response to ocean acidification, we examined the physiological performance of two hard corals that occur with increased or unaltered abundance at a seep site (mean pHTotal=7.8, pCO2=862 μatm) compared to a control site (mean pHTotal=8.1, pCO2=323 μatm), namely massive Porites spp. and Pocillopora damicornis, and two species with reduced abundance, Acropora millepora and Seriatopora hystrix. Oxygen fluxes, calcification, and skeletal densities were analyzed in corals originating from the seep and control site. Net photosynthesis rates increased considerably in Porites spp. and A. millepora and slightly in P. damicornis at increased pCO2, but remained unaltered in S. hystrix. Dark respiration rates remained constant in all corals investigated from both sites. Rates of light calcification declined in S. hystrix at high pCO2, but were unaffected by pCO2 in the other three coral taxa. Dark and net calcification rates remained unchanged in massive Porites a...Continue Reading

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Citations

Aug 24, 2016·Global Change Biology·Holly M BennettJames J Bell
Sep 15, 2017·Proceedings. Biological Sciences·Katharina E FabriciusGlenn De'ath
Jul 25, 2019·Biology Letters·T BiscéréR Rodolfo-Metalpa
Mar 18, 2020·The Journal of Experimental Biology·Peter J Edmunds, Scott C Burgess
Oct 14, 2017·Scientific Reports·Francesca GizziStefano Goffredo
Nov 18, 2016·Proceedings. Biological Sciences·Ian C EnochsKatharina E Fabricius
Jun 14, 2021·Marine Pollution Bulletin·Florita FloresAndrew P Negri

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