Pyrrophyta


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Related to Pyrrophyta: phylum Pyrrophyta, Euglenophyta, Chrysophyta

Pyrrophyta

the fire algae, of which the Dinophycae or dinoflagellates form the most important members of the PHYTOPLANKTON. They possess a photosynthetic pigment which is yellow to golden brown in colour (hence ‘fire algae’). Most forms have two dissimilar FLAGELLA though others lack them entirely.
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There were 6 species (genus) for Bacillariophyta and 3 species (genus) for Pyrrophyta, accounting for 5.5% and 2.8% of the total number of algae, respectively.
En este mes Chlorophyta abarco el 33% de los individuos reportados, seguido de Cyanophyta (26%), Heterokonthophyta (22%), Euglenophyta (13%), Xanthophyta (5%) y Pyrrophyta (1%).
Bacillariophyta was represented by 28, Chlorophyta by 25, Cyanophyta by 11, Heterokontophyta by 7, Cryptophyta by 3, Pyrrophyta by 2, and Euglenophyta by 1 species, respectively (Table 1).
Dinophytes (or Pyrrophyta, Dinophyceae, Dino-flagellata or Dinomastigota) ** are eukaryotic, but with an unusual, especially primitive nucleus whose chromosomes lack histones and are permanently condensed.
In the latter, Bacillariophyta, Chlorophyta, Pyrrophyta, and cyanobacteria collectively contributed [less than]28% to the total biomass.
The analysis of other algal groups, such as Cryptophyta, Bacillariophyta and Pyrrophyta showed an increase from August to early November 2010.
Any of numerous groups of chlorophyllcontaining, mainly aquaticeukaryotic organisms ranging from microscopic singlecelled forms tomulticellular forms 100 feet (30 meters) or more long, distinguishedfrom plants by the absence of true roots, stems, and leaves and by lack of non-reproductive cells in the reproductive structures: classifiedinto the six phyla Euglenophyta, Crysophyta, Pyrrophyta, Chlorophyta,Phaeophyta, and Rhodophyta.
The main groups considered in the identification were: Bacillariophyta, Chlorophyta, Pyrrophyta and Cyanobacteria (Hoek et al., 1995; Stanford, 1999).
The Lake Daihai is a typical algal-dominated lake, and there are about 121 species and 76 genera of algae of which belong to Chlorophyta (28 genera), Bacillariophyta (21 genera), Cyanophyta (9 genera), Euglenophyta (7 genera), and other algae including Pyrrophyta, Cryptophyta, and Chrysophyta [30].
The phytoplankton species compositions in Qingdao and Weihai were quite similar, being composed of 50% Bacillariophyta, 29% Pyrrophyta, 5% Chlorophyta, 5% Chrysophyta, 7% Protozoa, and 4% unidentified species.
(2000) and Richards (2001) also reported the presence of algae, from divisions such as Cyanobacteria, Chrysophyta, Euglenophyta, Chlorophyta and Pyrrophyta. Baumgartner (1987) studied the role of U.