Like all coccolithophore species, Emiliania huxleyi is confined to the upper part of the water column where light allows photosynthesis. The depth of this zone varies with oceanic conditions, but typically E. huxleyi only occurs in the top 50-100m of the water column.
E. huxleyi has an exceptionally wide distribution.
Most coccolithophore species have reasonably clear ecological preferences in terms of:
As a result, there are clearly different assemblages of coccolithophores in, for instance, the surface waters of oligotrophic gyres, the deep photic zone and in eutrophic upwelled waters (e.g. Winter et al. 1994).
E. huxleyi, however, occurs almost everywhere:
A one litre water sample taken from the photic zone of the ocean virtually anywhere in the world is likely to contain numerous specimens of E. huxleyi, with abundance varying from several hundred cells in low-productivity, mid-ocean waters to a few million cells per litre in blooms.
Emiliania huxleyi is the most abundant coccolithophore species and frequently dominates assemblages. Explore why it might be so successful compared to other species.