Moreover, the incidence of relatively high pH values (>7.8) in surface from January to March coincide well with the observed by Rivera (1997), which it was associated to increased stratification and subsequent decrease of dissolved inorganic phosphorus, and low phytoplankton production mainly represented by populations of Chlrophyceae and Desmidiaceae
, that are typical of oligotrophic environments.
The other four groups, Myxophyceae, Desmidiaceae
, Protozoa and rotifers were also consumed but in less quantity.
A contribution to knowledge of the desmid flora (Desmidiaceae
, Zygnemaphyceae) of Spitzbergen.
being represented by good number of representatives recorded a peak in April and minima in July.
Zygnematales: Zygnemataceae, Mesotaeniaceae and Desmidiaceae
bicaudatus (Chodat) Micractiniaceae Golenkinia radiata (Chodat) Oocystaceae Errerella bornhemiensis (Conrad) Franceia droescheri (Lemm.) Oocystis lacustris (Chodat) Oocystis borgei (Snow) Hydrodictyaceae Pediastrum boryanum (Turp) Zygnematales Desmidiaceae
Euastrum pectinatum (West) Cosmarium margaritatum (Lund) Staurastrum rotula (Norsdt.) Staurastrum cornatum (Arch.) Zygnemataceae Mougeotia elagantula (Witrr) Volvocales Volvocaceae Eudorina elagans (Ehr.) Phacotaceae Phacotus lenticularis (Stein.) Chlamydomonadaceae Chlamydomonas polypyrenoideum (Prescott) C.
Genera in the Scenedesmaceae include Scenedesmus and Coelastrum, genera in the Desmidiaceae
include Micrasterias, Desmidium, Cosmarium, Gonatozygon, Bambusina, Pleurotaenium, Staurastrum, Arthrodesmus, Xanthidium, and Closterium.
The results obtained for phytoplankton composition in the water show the importance of Chlorophyta, representing the largest contribution relatively to the number of taxa (54%), the families Hydrodictyaceae and Desmidiaceae
stand out with 3 and 4 taxa, respectively.