By Chantal Billard, Isao Inouye (auth.), Prof. Dr. Hans R. Thierstein, Dr. Jeremy R. Young (eds.)
In the previous few years speedy development has been made concerning our knowing of 1 of the dominant phytoplankton teams of the world's oceans: the coccolithophores. between different projects, the EU-funded TMR community CODENET (Coccolithophores Evolutionary Biodiversity and Ecology community) has supplied new effects and insights. those and plenty of different findings are reviewed and synthesized in a couple of person chapters which specialise in coccolithophore biology (molecular to cellular), ecology (experimental and within the ocean), evolutionary phylogeny and its effect on present and earlier worldwide alterations. Coccolithophores are rising as a primary version for interdisciplinary worldwide switch learn because of their nice abundance, extensive distribution and exemplary geological checklist. the consequences awarded during this booklet tackle the elemental query of the interplay among the biota and the surroundings at a variety of temporal and spatial scales.
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Additional info for Coccolithophores: From Molecular Processes to Global Impact
In both cases photosynthesis provides the main energy source for processes involved in calcification (see text for details). There is good evidence that HC0 3' is the external Ci source for calcification in coccolithophores (see Paasche 2001; Berry et al. 2002 for recent reviews). H+ produced during the formation of carbonate in the coccolith vesicle (Fig. 2) may potentially be used to enable production of CO 2 from Ci accumulated as HC0 3' in the chloroplast (Fig. 2A). Calcification may therefore have provided coccolithophores with an evolutionary advantage under conditions where CO 2 availability may be limiting for photosynthesis.
Huxleyi was also shown to be resistant to photoinhibition, suggesting that calcification does not provide a metabolic protection against high light levels. More experiments monitoring photosynthesis in calcifying and non-calcifying cells at high light levels under varying conditions of carbon 36 Brownlee and Taylor availability may shed further light on whether calcification serves any possible photo-protective role under more extreme conditions. Calcification and carbon acquisition Photosynthesis by marine phytoplankton requires acquisition of Ci from seawater.
Systematics Association Special Vol No. 51, Clarendon Press, Oxford, pp 47-71 26 Billard and Inouye Green JC, Leadbeater BSC (1994) The Haptophyte Algae. Systematics Association Special Vol No 51 , Clarendon Press, Oxford Green JC, Pienaar RN (1977) The taxonomy of the order Isochrysidales (Prymnesiophyceae) with special reference to the genera lsochrysis Parke, Dicrateria Parke and Imantonia Reynolds. J mar bioI Ass UK 57: 7-17 Green JC, Course PA, Tarran GA (1996) The life cycle of Emiliania huxleyi: A brief review and a study of relative ploidy levels analysed by flow cytometry.
Coccolithophores: From Molecular Processes to Global Impact by Chantal Billard, Isao Inouye (auth.), Prof. Dr. Hans R. Thierstein, Dr. Jeremy R. Young (eds.)