Journal
ICES JOURNAL OF MARINE SCIENCE
Volume 69, Issue 3, Pages 465-474Publisher
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsr171
Keywords
aragonite saturation level; ocean acidification; porosity index; Pteropoda; shell structure; shell thickness; Thecosomata
Categories
Funding
- Australian Research Council [FT0991722]
- Australian Research Council [FT0991722] Funding Source: Australian Research Council
Ask authors/readers for more resources
Thecosomata (shelled pteropod molluscs) are calcifiers that play an important role in the ocean carbonate cycle. Ocean acidification as a result of the uptake of CO2 affects pteropods by increasing dissolution rates of their aragonite skeletons. Two species of pteropod found in Australian tropical waters were studied, Creseis acicula and Diacavolinia longirostris. To assess the changes in their aragonite shells, shell morphology, growth patterns, structure, size, and porosity are described for both species, from material collected at seven sites between the 1960s and the 2000s. Shell characteristics were used to explore variations over time potentially related to ocean acidification. The aragonite saturation level (Omega(arag)) of surface waters was hindcast and a decline equivalent to -10% (average of the seven sites) was found. Simultaneously, variations in shell thickness were recorded (C. acicula by -4.43 mm, D. longirostris by -5.37 mu m) over the study period along with a significant increase in shell porosity (C. acicula: +1.43%, D. longirostris: +8.69%). The work, although not conclusive, does suggest that pteropods off Northern Australia may have been influenced by the decline in Omega(arag) over the past few decades. Such adverse effects could ultimately affect thecosome survival and that of their predators.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available