Technical note: Development of an extraction protocol and colorimetric analysis for alginate in marine sediment. - Nakazato, Sota; Kawahara, Takashi; Ichii, Reiji; Akita, Shingo; Inoue, Akira; Fujita, Masaki; Kurihara, Hideyuki; Nakaya, Mitsuhiro; Ooki, Atsushi (Biogeosciences, 2026)