Leung, Jonathan; Nagelkerken, Ivan; Pistevos, Jennifer C A; Xie, Zonghan; Zhang, Sam; Connell, Sean D (2022): Seawater carbonate chemistry and mechanical properties of shark teeth [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.944930
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Abstract:
Ocean acidification can cause dissolution of calcium carbonate minerals in biological structures of many marine organisms, which can be exacerbated by warming. However, it is still unclear whether this also affects organisms that have body parts made of calcium phosphate minerals (e.g. shark teeth), which may also be impacted by the 'corrosive' effect of acidified seawater. Thus, we examined the effect of ocean acidification and warming on the mechanical properties of shark teeth (Port Jackson shark, Heterodontus portusjacksoni), and assessed whether their mineralogical properties can be modified in response to predicted near-future seawater pH (–0.3 units) and temperature (+3°C) changes. We found that warming resulted in the production of more brittle teeth (higher elastic modulus and lower mechanical resilience) that were more vulnerable to physical damage. Yet, when combined with ocean acidification, the durability of teeth increased (i.e. less prone to physical damage due to the production of more elastic teeth) so that they did not differ from those raised under ambient conditions. The teeth were chiefly made of fluorapatite (Ca5(PO4)3F), with increased fluoride content under ocean acidification that was associated with increased crystallinity. The increased precipitation of this highly insoluble mineral under ocean acidification suggests that the sharks could modulate and enhance biomineralization to produce teeth which are more resistant to corrosion. This adaptive mineralogical adjustment could allow some shark species to maintain durability and functionality of their teeth, which underpins a fundamental component of predation and sustenance of the trophic dynamics of future oceans.
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Supplement to:
Leung, Jonathan; Nagelkerken, Ivan; Pistevos, Jennifer C A; Xie, Zonghan; Zhang, Sam; Connell, Sean D (2022): Shark teeth can resist ocean acidification. Global Change Biology, 28, 2286–2295, https://doi.org/10.1111/gcb.16052
Original version:
Leung, Jonathan (2021): Mechanical properties, degree of damage, mineral composition and crystallinity of the teeth of Port Jackson sharks reared under ocean acidification and warming in laboratory. PANGAEA, https://doi.org/10.1594/PANGAEA.939036
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2021): seacarb: seawater carbonate chemistry with R. R package version 3.2.16. https://cran.r-project.org/web/packages/seacarb/index.html
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Coverage:
Latitude: -35.053116 * Longitude: 137.730557
Date/Time Start: 2020-05-27T13:48:00 * Date/Time End: 2020-11-27T16:25:00
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Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2022-06-02.
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License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1856 data points