Le peuplement littoral de Hon-Chong (Nhatrang)

On the area in relation with the very wave battered made, the associations to be noted are: 1) association with Bangia sp., which is seasonal and located at the level of Brachytrichia maculans. 2) Association with Chthamalus stellatus, which is very well developed over under the oysters’ level. 3) Association with Dermonema frappieri, which form a narrow band over the Chnoospora minima band. At the same level are located the associations with Ectocarpus braeviarticulatus, with Centroceras clavulatum, with Gymnogongrus Sereneii and with Chaetomorpha antennina. The infralittoral level does not present any conspicuous different.

The changes in various iron compounds in culture media for algae. [Translation from: Archiv fur Hydrobiologie Supplemente Band 38(1/2) 151-169, 1970.]

The purpose of this work is a contribution to the quantitative record of the use of iron by planktonic algae. Preliminary experiments with Chlorella to determine the rate of iron intake in the presence of inorganic sources of iron did not produce the desired result. The crucial point of this work is the investigation of the influence of various external factors on the stability of FeEDTA (FeEDTA = Ferric(III)-compound of ethylene-diamine tetra-acetic acid), since this compound appears to be particularly well-suited as a source of iron for planktonic algae (e.g. TAMIYA et al. 1953). Cultures of Chlorella fusca in a light thermostat were used in experimental research. Methods and results are discussed.