Journal
ICES JOURNAL OF MARINE SCIENCE
Volume 69, Issue 3, Pages 460-464Publisher
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsr123
Keywords
Centrostephanus rodgersii; hypercapnia; ocean acidification; sea urchin larvae
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Funding
- Australian Research Council
- National Climate Change Adaptation Facility (SSF)
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The effects of near-future ocean acidification/hypercapnia on larval development were investigated in the sea urchin Centrostephanus rodgersii, a habitat-modifying species from eastern Australia. Decreased pH (-0.3 to -0.5 pH units) or increased pCO(2) significantly reduced the percentage of normal larvae. Larval growth was negatively impacted with smaller larvae in the pH 7.6/1800 ppm treatments. The impact of acidification on development was similar on days 3 and 5, indicating deleterious effects early in development. On day 3, increased abnormalities in the pH 7.6/1600 ppm treatment were seen in aberrant prism stage larvae and arrested/dead embryos. By day 5, echinoplutei in this treatment had smaller arm rods. Observations of smaller larvae in C. rodgersii have significant implications for this species because larval success may be a potential bottleneck for persistence in a changing ocean.
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