Castellani, G, Granskog, MA, Elias Chereque, A, Chan, ACY, Perez, I, Flores, H, Katlein, C and Peeken, I (2025) Arctic sea-ice ridges: a major contributor to algal habitable space in spring. Frontiers in Marine Science, 12. doi:10.3389/fmars.2025.1653882