Ocean acidification and warming reduce juvenile survival of the fluted giant clam, Tridacna squamosa

S A Watson; Paul C Southgate; G M Miller; J A Moorhead; J Knauer

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Ocean acidification and warming reduce juvenile survival of the fluted giant clam, Tridacna squamosa

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Ocean acidification and warming reduce juvenile survival of the fluted giant clam, Tridacna squamosa

S A Watson, Paul C Southgate, G M Miller, J A Moorhead and J Knauer

Molluscan Research, Vol.32(3), pp.177-180

2012

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Abstract

climate change

carbon dioxide

high-CO2

temperature

ecology

Cardiidae

Tridacninae

mollusc

bivalve

Bivalvia

Anthropogenic carbon dioxide (CO2) emissions are causing ocean acidification and ocean warming; however, the synergistic effects of these stressors on giant clams are completely unknown. Juveniles of the fluted giant clam, Tridacna squamosa Lamarck, 1819, were exposed to present-day control seawater (416 μatm pCO2) and seawater treated with CO2 to simulate ocean conditions predicted for the next 50-100 years (622 μatm pCO2 and 1019 μatm pCO2). These CO2 treatments were crossfactored with seawater temperatures of ~28.5 °C, ~30.0 °C and ~31.5 °C. The majority of mortality occurred between 40 and 60 days. Survival of juveniles decreased with increasing pCO2 and decreased with increasing seawater temperature. The combination of the highest pCO2 and both the moderate and highest seawater temperatures resulted in the lowest survival of <20 % indicating survival of T. squamosa could be reduced considerably at ocean conditions predicted to occur around the end of this century. © 2012 Malacological society of australasia & society for the study of molluscan diversity.

Details

Title: Ocean acidification and warming reduce juvenile survival of the fluted giant clam, Tridacna squamosa
Authors: S A Watson (Author) - James Cook University
Paul C Southgate (Author) - James Cook University
G M Miller (Author) - James Cook University
J A Moorhead (Author) - James Cook University
J Knauer (Author) - Darwin Aquaculture Centre
Publication details: Molluscan Research, Vol.32(3), pp.177-180
Publisher: Taylor & Francis Ltd.
Date published: 2012
ISSN: 1323-5818
Organisation Unit: School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449403202621
Output Type: Journal article

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