SOME INTERESTING PROBLEMS O F ANTARCTIC LIMNOLOGY WITH SPECIAL REFERENCE TO THE ALLELOPATHIC EFFECTS ON THE ALGAL ECOLOGY (EXTENDED ABSTRACT)

• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; The Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.9762; http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1991-Akiyama.pdf

The occurrence and distribution of algae in Antarctic inland waters are mainly limited by extreme low temperature and peculiar light-dark rhythm in the Antarctic environment. The development of the algal vegetation is also closely related to the water quality, particularly of the levels of content of nutrient salts. Additionally, in the case of small closed habitat, the biotic interaction such as allelopathic effect is also possibly one of the effective determinants in the structure and composition of Antarctic algal communities. It is well known that angiosperm metabolites and their decomposed substances frequently act on other plants as allelopathic agents (RICE, 1984). The antialgal activity of Antarctic terrestrial plants such as certain species of mosses and lichens has been reported (AKIYAMA et al., 1988, 1989), and in the case of algal epiphytes and moss plants, it was recognized that both the number of epiphytic species and the quan-tity of algal biomass are closely related to the allelopathic potential indicated by paper-disc test of host moss plants. The antialgal effect caused by the presence of acrylic acid and oxalic acid of pen-