Cryptophyta


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Cryptophyta

[‚krip·tə′fīd·ə]
(botany)
A division of the algae in some classification schemes; equivalent to the Cryptophyceae.
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Groups Observed frequencies for the operation periods (h) 0 20 40 60 80 100 120 140 160 Fitoplancton Bacillariophyta ++ ++++ ++++ ++++ ++++ +++ ++++ +++ +++ Chlorophyta ++++ - ++ +++ +++ +++ +++ +++ ++++ Euglenophyta +++ +++ +++ ++ +++ ++++ - ++++ +++ Cyanophyta - - +++ - ++ ++ - - - Cryptophyta - ++ - +++ - - - - - Dinophyta - - +++ - - - - - - Zooplancton Rotifera - - - - - - - - - Cladocera - - - - - - - - - Copepoda - - - - - - - - - Bacteria ++++ ++++ ++++ ++++ ++++ ++++ ++++ ++++ ++++ Fungi +++ +++ +++ +++ +++ +++ +++ +++ +++ Protozoa +++ +++ +++ +++ +++ +++ +++ +++ +++ Range: (++++) predominant, (+++) frequent, (++) less frequent and (-) not observed.
Cyan: Cyanophyta, Chlo: Chlorophyta, Baci: Bacillariophyta, Eugl: Euglenophyta, Cryp: Cryptophyta, Pyrr: Pyrrophyta, Chry: Chrysophyta, Xant: Xanthophyta.
Generally speaking, in mesotrophic lakes, Pyrrophyta, Cryptophyta, and Bacillariophyta are the dominant species, and in eutrophic lakes, Chlorophyta and Cyanophyta are the dominant species [21].
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).
Among the other groups analyzed, Bacillariophyta and Pyrrophyta were negatively correlated with Diff2-10m, and Cryptophyta showed only a weak correlation with temperature at 2 m (Table 2).
Ademas, presento un primer maximo de alta densidad (3,32E+ 05 ind m[L.sup.-1]), dominado por especies del phylum Cryptophyta, cuyas especies mas abundantes fueron C.
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].
Chlorophyta was the most specious group (98 taxa), followed by Bacillariophyta (58 taxa), Cyanophyta (32 taxa), Zygnemaphyta (21 taxa), Euglenophyta (8 taxa), Chrysophyta (7 taxa), Dinophyta (6 taxa), Cryptophyta (2 taxa) and Rodophyta (1 taxa).