Effect of ocean acidification on the oxygen consumption of the sea urchins Paracentrotus lividus (Lamarck, 1816) and Arbacia lixula (Linnaeus, 1758) living in CO2 natural gradients - Fernández-Vilert, Robert; Arranz, Vanessa; Martín-Huete, Marta; Hernández, José Carlos; González-Delgado, Sara; Pérez-Portela, Rocío (Frontiers in Marine Science, 2025)