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Antarctic Circumpolar Current; Dissolved Organic-Carbon; Marine-Phytoplankton; Biological Response; Iron Fertilization; Ross Sea; Dioxide; 170-Degrees-W; Productivity; Plankton
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Full-Text Articles in Life Sciences
Co(2) Sensitivity Of Southern Ocean Phytoplankton, Pd Tortell, Cd Payne, Yy Li, S Trimborn, B Rost, Walker O. Smith Jr., Et Al.
Co(2) Sensitivity Of Southern Ocean Phytoplankton, Pd Tortell, Cd Payne, Yy Li, S Trimborn, B Rost, Walker O. Smith Jr., Et Al.
VIMS Articles
The Southern Ocean exerts a strong impact on marine biogeochemical cycles and global air-sea CO(2) fluxes. Over the coming century, large increases in surface ocean CO(2) levels, combined with increased upper water column temperatures and stratification, are expected to diminish Southern Ocean CO(2) uptake. These effects could be significantly modulated by concomitant CO(2)-dependent changes in the region's biological carbon pump. Here we show that CO(2) concentrations affect the physiology, growth and species composition of phytoplankton assemblages in the Ross Sea, Antarctica. Field results from in situ sampling and ship-board incubation experiments demonstrate that inorganic carbon uptake, steady-state productivity and diatom …