A note on Stichococcus bacillaris Naeg. and some species of Chlorella as marine algae

Abstract

(Text- fig. I)The recent publication (Butcher, 1952) of some new marine algal species belonging to genera largely non-marine arouses interest as there are relatively few genera ranging from marine to freshwater habitats. Two of the genera concerned, Chlorella and Stichococcus, are notable for their very wide habitat range in fresh water and on land.Three marine Stichococcus strains were examined and compared with S. bacillaris Naegeli, 1849, and with various non-marine strains of that species. And that was not a species of Stichococcus Naeg. Though the tendency to fragment is strong in these strains the method of cell division appears typical of the genus and not intermediate between it and Nannochloris as Butcher suggests. The type strain when grown in a sea water and soil biphasic medium produces filaments of usually four to eight cells and occasionally up to 18 cells; while in the other strains seldom are more than two cells seen in a filament. That Butcher's alga is both aquatic and marine does not warrant its position in a separate species. Though S. bacillaris is frequently found in damp terrestrial places it is often also aquatic and like Chlorella is one of the more usual colonists of neglected stock bottles of various solutions and of distilled water. It is not surprising therefore that this alga should be found in estuarine and off-shore marine waters.To test the impression that S. bacillaris is an unexacting plant regarding salinity three strains were grown in (a) Foyn's erdschreiber medium, (b) the

Biodiesel production from Stichococcus strains at laboratory scale

“…The results reported in the present investigation confirm that S. bacillaris grows well in both fresh‐ and sea‐water media 33. This feature is particularly important nowadays.…”

Reproductive Rate of Planktonic Rotifers as Related to Food and Temperature in Nature

“…While it was used successfully as the sole source of food for rotifers in some work by Lansing (1942), it is not digested by the crustacean Artemia, and live cells can be removed from the fecrs ( Gibor, 1956). While there might be some question that different species of Stichococcus are involved in the marine and freshwater locations, it has been pointed out by George (1957) that the frPshwater Stichococcus bacillm·is and the marine Stichococcus cylinrit·icum are morphologically similar, and both species grow on freshwater and on sea water media. It would seem therefore that one euryhaline species is involved; however, the identity of the Windermere species is not certain.…”

Are there any true marine Chlorella species? Molecular phylogenetic assessment and ecology of marine Chlorella-like organisms, including a description of Droopiella gen. nov.

“…Morphological features of Chlorella species isolated from marine and brackish habitats. George (1957) raised the question, whether the strains isolated by Butcher are truly marine species, or freshwater organisms, which entered the marine ecosystem through river estuaries and were then capable of surviving in brackish or fully marine seawater. The results of his culturing experiment supported this hypothesis.…”