Seawater carbonate chemistry and shell growth of Atlanta ariejansseni


The atlantid heteropods represent the only predatory, aragonite shelled zooplankton. Atlantid shell production is likely to be sensitive to ocean acidification (OA), and yet we know little about their mechanisms of calcification, or their response to changing ocean chemistry. Here, we present the first study into calcification and gene expression effects of short-term OA exposure on juvenile atlantids across three pH scenarios: mid-1960s, ambient and 2050 conditions. Calcification and gene expression indicate a distinct response to each treatment. Shell extension and shell volume were reduced from the mid-1960s to ambient conditions, suggesting that calcification is already limited in today's South Atlantic. However, shell extension increased from ambient to 2050 conditions. Genes involved in protein synthesis were consistently upregulated, whereas genes involved in organismal development were downregulated with decreasing pH. Biomineralization genes were upregulated in the mid-1960s and 2050 conditions, suggesting that any deviation from ambient carbonate chemistry causes stress, resulting in rapid shell growth. We conclude that atlantid calcification is likely to be negatively affected by future OA. However, we also found that plentiful food increased shell extension and shell thickness, and so synergistic factors are likely to impact the resilience of atlantids in an acidifying ocean.

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 2022-10-21.

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Metadata Access
Creator Wall-Palmer, Deborah ORCID logo; Mekkes, Lisette; Ramos-Silva, Paula ORCID logo; Dämmer, Linda K ORCID logo; Goetze, Erica ORCID logo; Bakker, Karel ORCID logo; Duijm, Elza ORCID logo; Peijnenburg, Katja T C A ORCID logo
Publisher PANGAEA
Contributor Yang, Yan
Publication Year 2021
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 388 data points
Discipline Earth System Research
Spatial Coverage (-30.000 LON, -41.150 LAT)
Temporal Coverage Begin 2017-10-01T00:00:00Z
Temporal Coverage End 2017-10-31T00:00:00Z