کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4549472 | 1627369 | 2006 | 23 صفحه PDF | دانلود رایگان |
Production of calcium carbonate by marine calcifying organisms has been shown to decrease under increasing CO2. This effect appears to be driven by a decrease in [CO32−]. The modelling study here described aims at investigating whether the success of a marine calcifying phytoplankton species, the coccolithophore Emiliania huxleyi, may be tied to [CO32−]. The work highlights the complex interactions between the carbonate system variables and spring blooms, and the possibility of a link to the competition between calcifying vs. non-calcifying species on the Bering Sea shelf. We find that the strong seasonal cycle in [CO32−] is driven primarily by carbon drawdown during spring blooms. The interesting outcome of this work is the fact that E. huxleyi bloom timings always coincide with periods of high [CO32−], which is consistent with studies showing coccoliths malformations and a slowdown in calcification at low [CO32−]. Whether the condition of high [CO32−] can be considered a crucial ecological factor for the success of E. huxleyi, however, remains an open and important question needing further investigation.
Journal: Journal of Marine Systems - Volume 59, Issues 1–2, January 2006, Pages 120–142