Seawater carbonate chemistry and net calcification rates of cold-water coralline algae Clathromorphum compactum and Clathromorphum nereostratum ...

• Main Authors: Westfield, Isaac T, Gunnell, John, Rasher, D B, Williams, Branwen, Ries, Justin B
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Benthos; Calcification/Dissolution; Clathromorphum compactum; Clathromorphum nereostratum; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Growth/Morphology; Laboratory experiment; Macroalgae; North Atlantic; North Pacific; Plantae; Rhodophyta; Single species; Temperate; Temperature; Type; Species; Sample ID; Date; Time in days; Partial pressure of carbon dioxide water at sea surface temperature wet air; Temperature, water; pH; Identification; Buoyant mass; Surface area; Growth; Calcification rate; Salinity; Salinity, standard deviation; Temperature, water, standard deviation; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbon dioxide, partial pressure; Carbon dioxide, partial pressure, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Bicarbonate; Bicarbonate ion, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Ocean acidification; Alaska
• Online Access: https://dx.doi.org/10.1594/pangaea.946236; https://doi.pangaea.de/10.1594/PANGAEA.946236

Ocean acidification and warming are expected to disproportionately affect high-latitude calcifying species, such as crustose coralline algae. Clathromorphum nereostratum and Clathromorphum compactum are the primary builders of carbonate-hardgrounds in the Aleutians Islands of Alaska and North Atlantic shelf, respectively, providing habitat and settlement substrates for a large number of species. We exposed wild-collected specimens to 12 pCO2/T treatments (344–3322 μatm; 6.38–12.40°C) for 4 months in a factorially crossed, replicated laboratory experiment. Impacts of pCO2/T on algal calcification were quantified from linear extension and buoyant weight. Here we show that, despite belonging to the same genus, C. nereostratum exhibited greater sensitivity to thermal stress, while C. compactum exhibited greater sensitivity to pH stress. Furthermore, multivariate models of algal calcification derived from the experiment indicate that both C. nereostratum and C. compactum will commence net dissolution as early as ... : 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 2022-07-12. ...