On continental shelves, the contribution of nanoplanktonic haptophytes
is also important (Simon et al., 2009).
Adults of both species were fed a mixture of the following unicellular algae (with Culture Collection of Marine Phytoplankton numbers): the haptophytes
Isochysis lutea (CCMP 463), Isochrysis sp.
At this point we have documented the presence of 35 genera of haptophytes
, 55 genera of diatoms and 6 genera of dinoflagellates.
of the Nervion River estuary, northern Spain.
Among the small algae (d < 40 gm) chlorophytes prevailed followed by cryptophytes and discoid diatoms (genera Cyclotella, Stephanodiscus, Cyclostephanos) and chrysophytes + haptophytes
. A significant increase in the biomass of this group occurred in 1999 and 2004 (Fig.
In freshwaters, these blooms include toxic and noxious cyanobacteria while in estuaries, harmful haptophytes
and toxic dinoflagellates arise.
Rather than referring to a specific taxonomic group, this catch-all collective name is used here to include, in addition to some less important groups, the groups of haptophytes
(including coccolithophorids, diatoms, and silicoflagellates) that will have to be reclassified when they are better known and a consensus has been reached on the affinities of these diverse flagellates, now more widely studied thanks to electron micros-copy ***.
A revised classification scheme for living haptophytes
. Micropaleontology, 50: 55-79.
454 pyrosequencing to describe microbial eukaryotic community composition, diversity and relative abundance: a test for marine haptophytes
. PLoS One 8: e74371.
Among the most frequent organisms belonging to other groups are the chrysophyte Distephanus [= Dictyocha] speculum and haptophytes
of the genus Phaeocystis.
In deeper euphotic zone communities, where photosynthetic cells dominated, dot-blot, clone library, and molecular characterization of cells sorted by flow cytometry found that phylogenetic groups that are usually mixotrophic, such as Haptophytes
(Prymnesiophytes) or dinoflagellates, or that might contain mixotrophs (such as the Chrysophyceae among photosynthetic Heterokonts/Stramenopiles) were important or dominant among chlorophyll-containing cells (Lepere et al., 2009; Shi et al., 2009, 2011).