Pandorina


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Pandorina

 

a genus of mobile, colonial green algae of the order Volvocales. There are two known species, both of which are found in freshwaters. The colonies are globose or elliptic and measure 70–150 microns. They are enclosed in a gelatinous envelope and consist of 16 (less frequently, eight or 32) cells, each bearing two flagella. In asexual reproduction, each cell divides into 16 daughter cells, thus forming a new colony. The sexual process is heterogamy.

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West -- -- -- Tetraedron gracile Hansgirg -- -- -- Pandorina sp -- -- -- Pediastrum sp -- -- -- Micrasterias sp -- -- -- Microspora sp -- -- -- Mougeotia sp -- -- -- TOTAL INDIVIDUAL COUNT 4 4 7 CLASS DINOPHYCEAE Ceratium sp -- -- -- Gymnodinium sp 50 -- -- Perinidium cinctum (Muller) Ehrenberg -- -- -- Perinidium sp -- -- -- TOTAL INDIVIDUAL COUNT 50 0 0 CLASS EUGLENOPHYCEAE -- Euglena sp -- -- -- Phacussp 2 -- -- TOTAL INDIVIDUAL COUNT 2 0 0 CLASS CYANOPHYCEAE Lyngbya sp -- 2 -- O.
CHARACTER TAXA OF THE ALLIANCE: Actinastrum hantzschii, Closterium limneticum, Micractinium pusillum, Mucidosphaerium pulchellum, Pandorina morum, Pediastrum duplex, Scenedesmus quadricauda.
The present study concludes that the presence of some pollution indicator species such as Anabaena sp., Chroococcus sp., Microcystis sp., Oscillatoria sp., Spirulina sp., (among Cyanophaceae), Ankistrodesmus sp., Pandorina sp., Pediastrum sp., Scendesmus sp.
quadrisetum (a) Behre Eudorina unicocca Smith Gonium pectorale Muller Interfilum paradoxum (a) Chodat & Topali Keratococcus raphidioides (a) (Hansg.) Pascher Lagerheimia ciliata (Lagerheim) Chodat Micractinium pusillum Fresenius X Monoraphidium circinale (Nygaard) Nygaard Nephrochlamys subsolitaria X X X Komarek & Foot Oocystis lacustris Chodat X X X X Pandorina morum Muller Pediastrum boryanum var.
The predominant genera of phytoplankton observed in the ponds during the study were Actinastrum, Ankistrodesmus, Closterium, Chlorella, Euglena, Micratinium, Microcystis, Osillatoria, Pandorina, Phacus, Scenedesmus.
x x Coelastrum astroideum De Notaris Coelastrum microporum Nageli Cosmarium botrytis Meneghini ex Ralfs x Keratococcus rhaphidioides (Hansgirg) Pascher Pandorina sp.
The Chlorophyceae were represented by species from the genera Closteriopsis, Closterium, Coelastrum, Dictyosphaerium, Eudorina, Oedogonium, Oocystis, Palmella, Pandorina, Staurastrum, Tetradesmus and Tetraspora.
Chlorophyceae dominated most of the time, the most frequent taxons were: Scenedesmus quadricauda, Chlorella sp., Eudorina sp., Pandorina sp., Dictyosphaerium sp.