Citation:

PANGAEA.930065

Name: Seawater carbonate chemistry and shell thickness, shell dissolution of Limacina helicina pteropods
Published: 2021-04-07
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Animalia; Calcification/Dissolution; Coast and continental shelf; Field observation; Growth/Morphology; Limacina helicina; Mollusca; North Pacific; Pelagos; Single species; Temperate; Upwelling; Zooplankton

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Abstract:

Shelled pteropods are widely regarded as bioindicators for ocean acidification, because their fragile aragonite shells are susceptible to increasing ocean acidity. While short-term incubations have demonstrated that pteropod calcification is negatively impacted by ocean acidification, we know little about net calcification in response to varying ocean conditions in natural populations. Here, we examine in situ calcification of Limacina helicina pteropods collected from the California Current Ecosystem, a coastal upwelling system with strong spatial gradients in ocean carbonate chemistry, dissolved oxygen and temperature. Depth-averaged pH ranged from 8.03 in warmer offshore waters to 7.77 in cold CO2-rich waters nearshore. Based on high-resolution micro-CT technology, we showed that shell thickness declined by 37% along the upwelling gradient from offshore to nearshore water. Dissolution marks covered only 2% of the shell surface area and were not associated with the observed variation in shell thickness. We thus infer that pteropods make thinner shells where upwelling brings more acidified and colder waters to the surface. Probably the thinner shells do not result from enhanced dissolution, but are due to a decline in calcification. Reduced calcification of pteropods is likely to have major ecological and biogeochemical implications for the cycling of calcium carbonate in the oceans.

Keyword(s):

Animalia; Calcification/Dissolution; Coast and continental shelf; Field observation; Growth/Morphology; Limacina helicina; Mollusca; North Pacific; Pelagos; Single species; Temperate; Upwelling; Zooplankton

Supplement to:

Mekkes, Lisette; Renema, Willem; Bednaršek, Nina; Alin, Simone R; Feely, Richard A; Huisman, Jef; Roessingh, Peter; Peijnenburg, Katja T C A (2021): Pteropods make thinner shells in the upwelling region of the California Current Ecosystem. Scientific Reports, 11(1), https://doi.org/10.1038/s41598-021-81131-9

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):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Median Latitude: 46.882632 * Median Longitude: -125.666974 * South-bound Latitude: 44.200000 * West-bound Longitude: -130.370000 * North-bound Latitude: 51.830000 * East-bound Longitude: -124.420000

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 2021-04-07.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Mekkes, Lisette		study
2	Species	Species		Mekkes, Lisette
3	Registration number of species	Reg spec no		Mekkes, Lisette
4	Uniform resource locator/link to reference	URL ref		Mekkes, Lisette		WoRMS Aphia ID
5	Station label	Station		Mekkes, Lisette
6	LATITUDE	Latitude		Mekkes, Lisette		Geocode
7	LONGITUDE	Longitude		Mekkes, Lisette		Geocode
8	Identification	ID		Mekkes, Lisette		Individual
9	Location	Location		Mekkes, Lisette
10	Shell, number of whorls	Whorls No	#	Mekkes, Lisette
11	Diameter	Ø	µm	Mekkes, Lisette
12	Height	h	µm	Mekkes, Lisette
13	Shell thickness	Shell thick	mm	Mekkes, Lisette		average
14	Dissolution	Diss	µm²	Mekkes, Lisette		Type1
15	Dissolution	Diss	µm²	Mekkes, Lisette		Type2
16	Dissolution	Diss	µm²	Mekkes, Lisette		Type3
17	Shell surface area	Shell SA	µm²	Mekkes, Lisette
18	Salinity	Sal		Mekkes, Lisette
19	Temperature, water	Temp	°C	Mekkes, Lisette
20	Carbon, inorganic, dissolved	DIC	µmol/kg	Mekkes, Lisette
21	Alkalinity, total	AT	µmol/kg	Mekkes, Lisette
22	Silicate	SILCAT	µmol/kg	Mekkes, Lisette
23	Phosphate	PHSPHT	µmol/kg	Mekkes, Lisette
24	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
25	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
26	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
27	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
28	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
29	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
30	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
31	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
32	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2250 data points

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