To study more details of cell wall we prepare SEM samples adapting the protocol from Van Westen (2015) for desmids
(acetone series: 30%, 50%, 70%, 85%, 95%, 100%, 100%).
The great representativeness of Zygnemaphyceae (desmids
) may be related in part to the amount of available substratum for colonization (diversity of aquatic vegetation), and the high values of nutrients and to the water temperature; and also due to the unicellular condition with mucilage sheaths around the cells.
. I: Aufwuchs and plankton communities of selected acid bogs alkaline bogs, and closed bogs.
Ecological characteristics are given for thhese desmids
Polymorphism in the desmid
Micrasterias laticeps and its taxonomical implications.
Food encountered included blue green algae (Spirulina, Nostoc) green algae (Mougeotia, Oedogonium), desmids
(Gonatozygon, Closterium, Spirotaemaia), diatoms (Navicula, Nitschia); rotifers (Gastropus, Trichocerca), Crustacea, plant parts, insect appendages, sand grains, and snail (Melanoides tuberculata).
The occurrence of green algae, diatoms, BGA and desmids
in the gut of the fish was recorded throughout the year (Table 1) which clearly indicated that fish is herbivorous.
During the summer many species of cyanobacteria, diatoms such as Asterionella and Fragellaria, dinoflagellates, desmids
, calanoid copepods, and cladocerans are present whereas in the winter there are centric diatoms, calanoid copepods, the cyanobacterium Anabacna, and small flagellated algae.
Protist movements include swimming, surface gliding (benthic diatoms, desmids
), or crawling (ameboid movement due to protoplasmic streaming).
This is true of many desmids
and diatoms found in the Andean lakes in Colombia.
With its several rows of sharp teeth, the tiny creature scrapes off and feeds on diatoms, desmids
, and other algae.
Algae of the Western Great Lakes area, with an illustrated key to the genera of desmids
and freshwater diatoms.