Elevated temperature and carbon dioxide levels alter growth rates and shell composition in the fluted giant clam, Tridacna squamosa

• Main Authors: Armstrong, Eric J, Watson, Sue-Ann, Sillman, Jonathon H, Calosi, Piero
• Format: Other/Unknown Material
• Language: English
• Published: Zenodo 2022
• Subjects: Tridacna; ocean acidification; ocean warming; calcification; mineralogy; Ocean acidification
• Online Access: https://doi.org/10.5281/zenodo.6401552

We investigated the effects of 60-d exposure to end-of-the-century projections for seawater temperature (+3 °C) and p CO 2 (+500 µatm) on growth, mineralogy, and organic content of shells and scutes in juvenile Tridacna squamosa clams. The provided excel file contains tables supplying the following raw datasets: (1) Concentrations of trace minerals (Data_Minerals) in shells and scutes IndividualID - unique ID for each juvenile Tridacna squamosa clam Type - type of skeletal material sampled (New: newly-formed, Old: older-growth, Shell: shell, Scute: scute). Exposure - experimental treatments (Ambient: ambient seawater conditions, High Temp: elevated temperature alone, High pCO2: elevated p CO 2 alone, Multistressor: elevated temperature and p CO 2 in combination). SampleMass_mg - mass(in mg) of powdered skeletal material analyzed. X_ppb - concentration (in parts per billion) of element X (Mg: Magnesium, Si: Silica, P: Phosphorus, K: Potassium, Mn: Manganese, As: Arsenic, Sr: Strontium, Ba: Barium, Ca: Calcium) in the sample. X_mmol_kg-1 - concentration (in mmol kg -1 ) of element X in the sample. XCaRatio_mmol_mol-1 - ratio of the concentrations of element X (in mmol) and calcium (in mol). BaCaRatio_µmol_mol-1 - ratio of the concentrations of barium (in µmol) and calcium (in mol). (2) Morphometric characteristics (Data_Morphometry) of shells/scutes IndividualID - unique ID for each juvenile Tridacna squamosa clam Exposure - experimental treatments (Ambient: ambient seawater conditions, High Temp: elevated temperature alone, High pCO2: elevated p CO 2 alone, Multistressor: elevated temperature and p CO 2 in combination). X_pre_mm - measurement value (in millimeters) prior to exposure to experimental treatments (APM: anterior-posterior margin or shell length, DVM: dorsal-ventral margin or shell height, OrnamentationMaxWidth: maximum width of the shell across the scutes, Width: shell width). X_pre_g - measurement value (in grams) prior to exposure to experimental treatments (WetMass: whole animal wet mass). ...