c5a713b2-7ac9-4d54-99c7-d44784c8e430 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-23T15:10:30 creation ISO 19115 2016 Data for [The ISME Journal]: Microbial competition for iron determines its availability to the Ferrous Wheel c5a713b2-7ac9-4d54-99c7-d44784c8e430 We dissect the spokes of the ferrous wheel associated with Fe demand by quantifying the uptake rates of heterotrophic bacteria and phytoplankton in the subantarctic Southern Ocean during summer and situate these findings within a seasonal context. To do so, we conducted bioassays in which the effects of light on Fe photochemistry and uptake physiology were studied by comparing light and dark incubations, and the effects of DOC supply and competition between phytoplankton and heterotrophic bacteria were examined by isolating bacteria from the larger members of the ferrous wheel by pre-incubation size fractionation. {"type": "Polygon", "coordinates": [[[139.884, -47.8], [142.884, -47.8], [142.884, -45.8], [139.884, -45.8], [139.884, -47.8]]]} 139.884 142.884 -47.8 -45.8 Iron Southern Ocean carbon competition ferrous wheel heterotrophic bacteria light microbes phytoplankton picoeukaryote DATA ACCESS - Southern Ocean Fe uptake rates [.xlsx] documentDigital XLSX ASSOCIATED PUBLICATION documentDigital Strzepek RF, Latour P, Ellwood MJ, Shaked Y, Boyd PW (2025). Microbial competition for iron determines its availability to the ferrous wheel. The ISME Journal. doi:10.1093/ismejo/wraf015 HTML ORCID documentDigital HTML ORCID documentDigital HTML Unnamed resource documentDigital License Graphic PNG