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Echinometra sea urchins acclimatized to elevated pCO(2) at volcanic vents outperform those under present-day pCO(2) conditions

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dc.contributor Australian Institute Of Marine Science
dc.contributor Oregon State University
dc.contributor Oregon University System
dc.contributor Dept Zool
dc.contributor Dept Marine Sci
dc.contributor Univ Otago
dc.contributor Australian Inst Marine Sci
dc.contributor Oregon State Univ
dc.contributor University Of Otago LAMARE, MILES UTHICKE, SVEN EBERT, THOMAS LIDDY, MICHELLE JOHANSSON, CHARLOTTE FABRICIUS, KATHARINA E. 2016-08-16T00:28:32Z 2017-03-21T01:03:01Z 2017-03-21T01:03:01Z 2019-05-09T01:23:18Z 2017-03-21T01:03:01Z 2016-08-16T00:28:32Z 2016-08-16T00:28:32Z 2019-05-09T01:23:18Z 2016-07-01
dc.identifier.citation Uthicke S. Ebert T, Liddy M, Johansson C, Fabricius KE, Lamare M (2016) Echinometra sea urchins acclimatised to elevated pCO2 at volcanic vents outperform those under present-day pCO2 conditions. Global Change Biology 22(7): 2451-2461 en_US
dc.identifier.issn 1354-1013
dc.description.abstract Rising atmospheric CO2 concentrations will significantly reduce ocean pH during the 21st century (ocean acidification, OA). This may hamper calcification in marine organisms such as corals and echinoderms, as shown in many laboratory-based experiments. Sea urchins are considered highly vulnerable to OA. We studied an Echinometra species on natural volcanic CO2 vents in Papua New Guinea, where they are CO2-acclimatized and also subjected to secondary ecological changes from elevated CO2. Near the vent site, the urchins experienced large daily variations in pH (>1 unit) and pCO(2) (>2000ppm) and average pH values (pH(T) 7.73) much below those expected under the most pessimistic future emission scenarios. Growth was measured over a 17-month period using tetracycline tagging of the calcareous feeding lanterns. Average-sized urchins grew more than twice as fast at the vent compared with those at an adjacent control site and assumed larger sizes at the vent compared to the control site and two other sites at another reef near-by. A small reduction in gonad weight was detected at the vents, but no differences in mortality, respiration, or degree of test calcification were detected between urchins from vent and control populations. Thus, urchins did not only persist but actually thrived' under extreme CO2 conditions. We suggest an ecological basis for this response: Increased algal productivity under increased pCO(2) provided more food at the vent, resulting in higher growth rates. The wider implication of our observation is that laboratory studies on non-acclimatized specimens, which typically do not consider ecological changes, can lead to erroneous conclusions on responses to global change.
dc.description.sponsorship We thank the owners of the reefs in Upa-Upasina and Dobu for allowing us access to their reefs and to the councillors of the Dobu RLLG, the Milne Bay Province Research Committee, and the Department of Environment and Conservation of Papua New Guinea for permits and logistical support. We are grateful to Rob van der Loos and the crew of the MV Chertan for their great support during our expeditions to the vents in Milne Bay. The field work was cofunded by the Great Barrier Reef Foundation's 'Resilient Coral Reefs Successfully Adapting to Climate Change' research and development program in collaboration with the Australian Government, the BioAcid II Program of the German Ministry for Education and Research (BMBF), and the Australian Institute of Marine Science.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher Wiley en_US
dc.relation.ispartof Null
dc.subject Co2-induced Ocean Acidification
dc.subject Ecology
dc.subject Global Change
dc.subject Coral-reefs
dc.subject Growth
dc.subject Life-history
dc.subject Strongylocentrotus-droebachiensis
dc.subject Biodiversity Conservation
dc.subject Environmental Sciences & Ecology
dc.subject Calcifying Invertebrates
dc.subject Environmental Sciences
dc.subject Genus Echinometra
dc.subject Carbon Dioxide Vents
dc.subject Acid-base-balance
dc.subject Indirect Effects
dc.subject Biodiversity & Conservation
dc.subject Seawater
dc.subject Ocean Acidification
dc.subject Carbonic-acid
dc.title Echinometra sea urchins acclimatized to elevated pCO(2) at volcanic vents outperform those under present-day pCO(2) conditions
dc.type journal article en_US
dc.identifier.doi 10.1111/gcb.13223
dc.identifier.wos WOS:000378722000014

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