Peña, Viviana; Harvey, Ben P; Agostini, Sylvain; Porzio, Lucia; Milazzo, Marco; Horta, Paulo Antunes; Gall, Line Le; Hall-Spencer, Jason M (2021): Seawater carbonate chemistry and coralline algal diversity [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.939815
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Abstract:
Calcified coralline algae are ecologically important in rocky habitats in the marine photic zone worldwide and there is growing concern that ocean acidification will severely impact them. Laboratory studies of these algae in simulated ocean acidification conditions have revealed wide variability in growth, photosynthesis and calcification responses, making it difficult to assess their future biodiversity, abundance and contribution to ecosystem function. Here, we apply molecular systematic tools to assess the impact of natural gradients in seawater carbonate chemistry on the biodiversity of coralline algae in the Mediterranean and the NW Pacific, link this to their evolutionary history and evaluate their potential future biodiversity and abundance. We found a decrease in the taxonomic diversity of coralline algae with increasing acidification with more than half of the species lost in high pCO2 conditions. Sporolithales is the oldest order (Lower Cretaceous) and diversified when ocean chemistry favoured low Mg calcite deposition; it is less diverse today and was the most sensitive to ocean acidification. Corallinales were also reduced in cover and diversity but several species survived at high pCO2; it is the most recent order of coralline algae and originated when ocean chemistry favoured aragonite and high Mg calcite deposition. The sharp decline in cover and thickness of coralline algal carbonate deposits at high pCO2 highlighted their lower fitness in response to ocean acidification. Reductions in CO2 emissions are needed to limit the risk of losing coralline algal diversity.
Keyword(s):
Supplement to:
Peña, Viviana; Harvey, Ben P; Agostini, Sylvain; Porzio, Lucia; Milazzo, Marco; Horta, Paulo Antunes; Gall, Line Le; Hall-Spencer, Jason M (2021): Major loss of coralline algal diversity in response to ocean acidification. Global Change Biology, 27(19), 4785-4798, https://doi.org/10.1111/gcb.15757
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
Project(s):
Coverage:
Median Latitude: 36.367935 * Median Longitude: 77.077500 * South-bound Latitude: 34.319170 * West-bound Longitude: 14.950000 * North-bound Latitude: 38.416700 * East-bound Longitude: 139.205000
Event(s):
Vulcano * Latitude: 38.416700 * Longitude: 14.950000 * Location: Vulcano, Aeolian Islands, North East Sicily, Italy * Method/Device: Experiment (EXP)
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 2021-12-31.
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1207 data points