Investigation on ecology and distribution of seaweed Gloiopeltis in coast of Guangdong province

The species, distribution, growth and propagation of the seaweed Gloiopeltis in coast of Guangdong province were investigated. The result is as follow. The main species of Gloiopeltis in coast of Guangdong province were G.tenax and G.furcata, in which the highest biomass of G.furcata reached 2 801.1 g · m^-2. The other species of Gloiopeltis in Guangdong was G.complanata that was distributed in partial area. The biomass of Gloiopeltis in the east coast was higher than that in the west coast and was the highest in Daya Bay. Gloiopeltis was distributed in sea area which was high diaphaneity and high salinity with not lower than 20 for the surface layer of water salty and G.tenax was more obviously distributed in offshore than G.furcata. G.furcata was mainly distributed in mid-tidal area while G.tenax in lower mid-tidal area. The research also showed that Gloiopeltis could stand exposing to air for 6~8 h. Growth temperature for Gloiopeltis was lower than 23℃ and it grew faster while water temperature was below 18℃. The growth and disappear of Gloiopeltis was obvious different from the seasons. The reproductive organ of G.furcata formed in December to next year April while G.tenax formed in January to April in coast of Guangdong province.