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Biochemical responses to ocean acidification contrast between tropical corals with high and low abundances at volcanic carbon dioxide seeps

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dc.contributor Ctr Chem & Biotechnol
dc.contributor Sch Life & Environm Sci
dc.contributor Deakin University
dc.contributor Deakin Univ
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science FABRICIUS, K. E. STRAHL, J. FRANCIS, D. S. DOYLE, J. HUMPHREY, C. 2017-03-21T01:02:18Z 2016-03-04T05:42:28Z 2016-03-04T05:42:28Z 2019-05-09T01:02:01Z 2017-03-21T01:02:18Z 2017-03-21T01:02:18Z 2016-03-04T05:42:28Z 2019-05-09T01:02:01Z 2016-02-01
dc.identifier.citation Strahl J, Francis DS, Doyle J, Humphrey C, Fabricius KE (2016) Biochemical responses to ocean acidification contrast between tropical corals with high and low abundances at volcanic carbon dioxide seeps. ICES Journal of Marine Science 73(3): 897-909 en_US
dc.identifier.issn 1054-3139
dc.description.abstract At two natural volcanic seeps in Papua New Guinea, the partial pressure of carbon dioxide (pCO(2)) in the seawater is consistent with projections for 2100. Here, the cover of massive scleractinian corals Porites spp. is twice as high at elevated compared with ambient pCO(2), while that of branching corals such as Acropora millepora is greater than twofold reduced. To assess the underlying mechanisms for such community shifts under long-term exposure to elevated pCO(2), biochemical parameters related to tissue biomass, energy storage, pigmentation, cell protection, and cell damage were compared between Porites spp. and A. millepora from control (mean pH(total) = 8.1, pCO(2) = 323 mu atm) and CO2 seep sites (mean pH(total) = 7.8, pCO(2) = 803 mu atm) each at two reefs. In Porites spp., only one of the biochemical parameters investigated (the ratio of photoprotective to light-harvesting pigments) responded to pCO(2), while tissue biomass, total lipids, total proteins, and some pigments differed between the two reefs, possibly reflecting differences in food availability. Furthermore, some fatty acids showed pCO(2) reef interactions. In A. millepora, most pigments investigated were reduced at elevated pCO(2), while other parameters (e.g. tissue biomass, total proteins, total lipids, protein carbonyls, some fatty acids and pigments) differed between reefs or showed pCO(2) reef interactions. Tissue biomass, total lipids, and cell-protective capacities were distinctly higher in Porites spp. than in A. millepora, indicating higher resistance to environmental stress in massive Porites. However, our data suggest that important biochemical measures remain relatively unaffected in these two coral species in response to elevated pCO(2) up to 800 mu atm, with most responses being smaller than differences between species and locations, and also when compared with responses to other environmental stressors such as ocean warming.
dc.description.sponsorship We thank the communities at Upa-Upasina and Dobu for their permission to study the corals on their reef. Many thanks to S. Noonan, N. Vogel, S. Uthicke, and the crew of the M.V. Chertan for their support during the fieldwork, and to H. Martinez, S. Hinz, C. Assaille, K. Berry, and P. Buerger for their assistance in the laboratory. We thank P. Davern and M. Donaldson for their help with the logistics and shipment of the equipment, and QantasLink for continued support. This project was funded by the Australian Government's Super Science Initiative (Grant FS110200034), the Australian Government's National Environmental Research Programme, and the Australian Institute of Marine Science.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher Oxford Journals en_US
dc.relation.ispartof Null
dc.subject Energy Storage en_US
dc.subject Lipid Classes en_US
dc.subject Volcanic Carbon Dioxide Seeps en_US
dc.subject Scleractinia en_US
dc.subject Ocean Acidification en_US
dc.subject Oxidative Stress en_US
dc.subject Fatty Acids en_US
dc.subject Pigments en_US
dc.subject Fisheries
dc.subject Photosynthesis
dc.subject Verrucosa
dc.subject Calcification
dc.subject Gas
dc.subject Lipids
dc.subject Porites
dc.subject Marine & Freshwater Biology
dc.subject Community
dc.subject Oceanography
dc.subject Reef Building Coral
dc.title Biochemical responses to ocean acidification contrast between tropical corals with high and low abundances at volcanic carbon dioxide seeps
dc.type journal article en_US
dc.identifier.doi 10.1093/icesjms/fsv194
dc.identifier.wos WOS:000371142000037

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