Carbon and nitrogen fluxes in the marine coccolithophore Emiliania huxleyi grown under different nitrate concentrations
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چکیده
منابع مشابه
Carbon and nitrogen fluxes in the marine coccolithophore Emiliania huxleyi grown under different nitrate concentrations
a r t i c l e i n f o Information on interaction of C and N at the cellular level is lacking for ecologically relevant phytoplankton species. We examined the effects of NO 3-availability on C and N fluxes in the widely distributed marine coccolithophore Emiliania huxleyi. Cells were cultured at replete (∼280 μM) and ambient (∼10 μM) NO 3-, the latter representing a typical surface water nitrate...
متن کاملAcidification, not carbonation, is the major regulator of carbon fluxes in the coccolithophore Emiliania huxleyi
A combined increase in seawater [CO2 ] and [H(+) ] was recently shown to induce a shift from photosynthetic HCO3 (-) to CO2 uptake in Emiliania huxleyi. This shift occurred within minutes, whereas acclimation to ocean acidification (OA) did not affect the carbon source. To identify the driver of this shift, we exposed low- and high-light acclimated E. huxleyi to a matrix of two levels of dissol...
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Coccolithophores are a vital part of oceanic phytoplankton assemblages that produce organic matter and calcium carbonate (CaCO3) containing traces of other elements (i.e. Sr and Mg). Their associated carbon export from the euphotic zone to the oceans' interior plays a crucial role in CO2 feedback mechanisms and biogeochemical cycles. The coccolithophore Emiliania huxleyi has been widely studied...
متن کاملShort-term response of the coccolithophore Emiliania huxleyi to abrupt changes in seawater carbon dioxide concentrations
The response of the coccolithophore Emiliania huxleyi to rising CO 2 concentrations is well documented in acclimated cultures where cells are exposed to the CO 2 treatments for several generations prior to the experiment. Extended acclimation times have generally been applied because of the lack of information about time required to reach a 5 new physiological " equilibrium " (acclimation) in r...
متن کاملNumerical cell model investigating cellular carbon fluxes in Emiliania huxleyi.
Coccolithophores play a crucial role in the marine carbon cycle and thus it is interesting to know how they will respond to climate change. After several decades of research the interplay between intracellular processes and the marine carbonate system is still not well understood. On the basis of experimental findings given in literature, a numerical cell model is developed that describes inorg...
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ژورنال
عنوان ژورنال: Journal of Experimental Marine Biology and Ecology
سال: 2010
ISSN: 0022-0981
DOI: 10.1016/j.jembe.2010.06.004