{"references": ["Anu, P.R., Bijoy Nandan, S., Jayachandran, P.R. & Don Xavier, N.D. 2016. Toxicity effects of copper on the marine diatom, Chaetoceros calcitrans. Regional Studies in Marine Science. 8:498\u2013504.", "Chance, R., Jickells, T.D. & Baker, A.R. 2015. Atmospheric trace metal concentrations, solubility and deposition fluxes in remote marine air over the south-east Atlantic. Marine Chemistry. 177:45\u201356.", "Debelius, B., Forja, J.M., del Valls, \u00c1. & Lubi\u00e1n, L.M. 2010. Toxic effect of copper on marine picophytoplankton populations isolated from different geographic locations. Scientia Marina. 74(SUPPL. 1):133\u2013141.", "Echeveste, P., Agust\u00ed, S. & Tovar-S\u00e1nchez, A. 2012. Toxic thresholds of cadmium and lead to oceanic phytoplankton: Cell size and ocean basin-dependent effects. Environmental Toxicology and Chemistry. 31(8):1887\u20131894.", "Muller, F.L.L., Jacquet, S. & Wilson, W.H. 2003. Biological factors regulating the chemical speciation of Cu, Zn, and Mn under different nutrient regimes in a marine mesocosm experiment. Limnology and Oceanography. 48(6):2289\u20132302.", "Pistocchi, R., Guerrini, F., Boni, L. & Balboni, V. 1997. Copper toxicity and carbohydrate production in the microalgae cylindrotheca fusiformis and gymnodinium sp. European Journal of Phycology. 32(2):125\u2013132.", "Quan, Q., Chen, Y., Ma, Q., Wang, F., Meng, X. & Wang, B. 2016. The impact of atmospheric deposition of cadmium on dominant algal species in the East China Sea. Journal of Ocean University of China. 15(2):271\u2013282."]}

This data compilation contains previously published (references included) threshold concentrations of copper and cadmium op phytoplankton, in open and coastal oceans. The data was recalculated to nmol/L for consistency, assuming the following molar masses of copper and cadmium as 63.546 and 112.411, respectively, and salinity as 1.025 kg/L. The temperature and salinity provided by the authors were also included, in case there is a desire for future users to utilise different conversion methods to recalculate original data. Only data with information on whether the authors measured the trace metal concentrations in open or coastal marine environments were included, along with the name of the phytoplankton. The oceans were divided into the Atlantic Ocean, Pacific Ocean and the Indian Ocean, and subsequently further subdivided according to the information authors have given in their publications.