Zinc, cadmium, and cobalt interreplacement and relative use efficiencies in the coccolithophore Emiliania huxleyi
نویسندگان
چکیده
منابع مشابه
Phenotypic Variability in the Coccolithophore Emiliania huxleyi
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 کاملInherent optical properties of the coccolithophore: Emiliania huxleyi.
A realistic nonspherical model for Emiliania huxleyi (EHUX) is built, based on electron micrographs of coccolithophore cells. The Inherent Optical Properties (IOP) of the EHUX are then calculated numerically by using the discrete dipole approximation. The coccolithophore model includes a near-spherical core with the refractive index of 1.04 + m(i)j, and a carbonate shell formed by smaller cocco...
متن کاملEffects of copper, cadmium, and zinc on the production and exudation of thiols by Emiliania huxleyi
Cultures of the ubiquitous coccolithophore Emiliania huxleyi grown at field-relevant fixed free ion concentrations of Cu, Cd, and Zn exude a broad array of thiols, some of which increase with increasing metal ion concentration. The primary thiols released are contingent on the particular metal or combination of metals added to the culture media. Exposure to Cu results in the release of arginine...
متن کاملZinc-bicarbonate colimitation of Emiliania huxleyi
In analogy to the Fe hypothesis, the Zn hypothesis states that Zn may limit primary production in some regions of the world oceans and therefore influence the global carbon cycle. The proposed mechanism is via carbon limitation due to a lack of the cofactor Zn in carbonic anhydrase. In the current conceptual model for the use of inorganic carbon by E. huxleyi, carbonic anhydrase in the chloropl...
متن کاملCarbon 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...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2007
ISSN: 0024-3590
DOI: 10.4319/lo.2007.52.5.2294