Gonzalez Bernat, Maria Jose (2011): Ocean acidification and its potential effects on the early life-history of non-calcifying and calcifying echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) larvae, 2011 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.778512, Supplement to: Gonzalez Bernat, MJ (2011): Ocean acidification and its potential effects on the early life-history of non-calcifying and calcifying echinoderm (Echinodermata) larvae. University of Otago, Department of Marine Science, https://hdl.handle.net/10523/1930
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Abstract:
Ocean acidification, as a result of increased atmospheric CO2, has the potential to adversely affect the larval stages of many marine organisms and hence have profound effects on marine ecosystems. This is the first study of its kind to investigate the effects of ocean acidification on the early life-history stages of three echinoderms species, two asteroids and one irregular echinoid. Potential latitudinal variations on the effects of ocean acidification were also investigated by selecting a polar species (Odontaster validus), a temperate species (Patiriella regularis), and a tropical species (Arachnoides placenta). The effects of reduced seawater pH levels on the fertilization of gametes, larval survival and morphometrics on the aforementioned species were evaluated under experimental conditions. The pH levels considered for this research include ambient seawater (pH 8.1 or pH 8.2), levels predicted for 2100 (pH 7.7 and pH 7.6) and the extreme pH of 7.0, adjusted by bubbling CO2 gas into filtered seawater.
Fertilization for Odontaster validus and Patiriella regularis for the predicted scenarios for 2100 was robust, whereas fertilization was significantly reduced in Arachnoides placenta. Larval survival was robust for the three species at pH 7.8, but numbers declined when pH dropped below 7.6. Normal A. placenta larvae developed in pH 7.8, whereas smaller larvae were observed for O. validus and P. regularis under the same pH treatment. Seawater pH levels below 7.6 resulted in smaller and underdeveloped larvae for all three species. The greatest effects were expected for the Antarctic asteroid O. validus but overall the tropical sand dollar A. placenta was the most affected by the reduction in seawater pH.
The effects of ocean acidification on the asteroids O. validus and P. regulars, and the sand dollar A. placenta are species-specific. Several parameters, such as taxonomic differences, physiology, genetic makeup and the population's evolutionary history may have contributed to this variability. This study highlights the vulnerability of the early developmental stages and the complexity of ocean acidification. However, future research is needed to understand the effects at individual, community and ecosystem levels.
Keyword(s):
Animalia; Arachnoides placenta; Benthic animals; Benthos; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Deep-sea; Echinodermata; Growth/Morphology; Laboratory experiment; Mortality/Survival; Odontaster validus; Patiriella regularis; Polar; Reproduction; Single species; Temperate; Tropical
Project(s):
Funding:
Sixth Framework Programme (FP6), grant/award no. 511106: European network of excellence for Ocean Ecosystems Analysis
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Gonzalez Bernat, MJ (2011): Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011. https://doi.org/10.1594/PANGAEA.778509
- Gonzalez Bernat, MJ (2011): Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) survival during experiments, 2011. https://doi.org/10.1594/PANGAEA.778510
- Gonzalez Bernat, MJ (2011): Seawater carbonate chemistry echinoderm (Odontaster validus, Patiriella regularis and Arachnoides placenta) size during experiments, 2011. https://doi.org/10.1594/PANGAEA.778511