The Study On Taxology And Ecology Of Sub-aerial Blue-green Algae Of Canyon Of Fenghuang Mountain

In this paper we studied the species composition of sub-aerial blue-green algae on Canyon of Fenghuang Mountain, and the relations between ecological factors and species composition were also discussed and analyzed.We collected 283 pieces of sub-aerial algae specimens from Canyon of Fenghuang Mountain in heilongjiang Province in Augest, 2006. Then we identified them by optical microscope. The result shows that there are 61 species and 2 varieties, belong of 6 families,16 genera.among them 2 genera, 38 species and 2 varieties are first recorded in Heilongjiang, 1 species is described as new to science.The study of taxology and ecology of sub-aerial blue-green algae of Heilongjiang was comparatively deficient in the past, and no one have concerned about the sub-aerial blue-green on canyon by now. As a result, my research will supply data to study the particular function of sub-aerial blue-green in terrestrial ecosystem. In this paper the species composition of sub-aerial blue-green algae on canyon was researched, an index on sub-aerial blue-green algae was compiled. In addition, the relations between species composition and ecological factors were also discussed and analyzed. After a detailed compare of frequencies of several species, it is discovered that Nostoc commune and Stigonema minutum have more excellent characteristics than the others to grow on canyon of Fenghuang Mountain.They enhance the water-holding power of soil and are good sources of organic matter, therefore we can reach the conclusion that Nostoc commune and Scytonema hofmanni can be considered as a pioneer in the improvement of lava.