Seawater carbonate chemistry and shell microstructure, mechanical properties of an edible estuarine oyster, supplement to: Meng, Yuan; Guo, Zhenbin; Yao, Haimin; Yeung, Kelvin W K; Thiyagarajan, Vengatesen (2019): Calcium carbonate unit realignment under acidification: A potential compensatory mechanism in an edible estuarine oyster. Marine Pollution Bulletin, 139, 141-149


Ocean acidification (OA) is well-known for impairing marine calcification; however, the end response of several essential species to this perturbation remains unknown. Decreased pH and saturation levels (Omega) of minerals under OA is projected to alter shell crystallography and thus to reduce shell mechanical properties. This study examined this hypothesis using a commercially important estuarine oyster Magallana hongkongensis. Although shell damage occurred on the outmost prismatic layer and the undying myostracum at decreased pH 7.6 and 7.3, the major foliated layer was relatively unharmed. Oysters maintained their shell hardness and stiffness through altered crystal unit orientation under pH 7.6 conditions. However, under the undersaturated conditions (Omega Cal ~ 0.8) at pH 7.3, the realigned crystal units in foliated layer ultimately resulted in less stiff shells which indicated although estuarine oysters are mechanically resistant to unfavorable calcification conditions, extremely low pH condition is still a threat to this essential species.

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) 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 2019-11-08.

Related Identifier
Related Identifier
Metadata Access
Creator Meng, Yuan; Guo, Zhenbin; Yao, Haimin; Yeung, Kelvin W K; Thiyagarajan, Vengatesen
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Contributor Yang, Yan
Publication Year 2019
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 918 data points
Discipline Earth System Research
Spatial Coverage (110.667 LON, 21.333 LAT)
Temporal Coverage Begin 2016-06-01T00:00:00Z
Temporal Coverage End 2016-06-30T00:00:00Z