The Investigation of Biomass of Macro-algas in Bushehr Port (Intertidal zone)

Introdouction: the biomass of macro- algas was studied in summer and winter at 4 elected stations during spring tide in high in 2011, mid and low intertidal zone in Boushehr Port in Persian Gulf. The aim of this study is to identify and determine biomass of macro-algas in the intertidal zone of the port of Bushehr. Quadrat sampling 0/5/0 × 0/5 m² was random. Totally 12 species of macro-algas identified and the average biomass were arranged in summer; Phaeophyceae (258.6625 g/m2) the highest biomass and Chlorophyceae the lowest biomass and in winter had Chlorophyceae (564.875 g/m2) the highest biomass and Rhodophyceae (191.8 g/m2) the lowest biomass. The result that was obtained by one way ANOVA, determined that the most abundance of macro-alga was in sub littoral zone. Compute test (Mann- Whitney) didn’t show the importance of biomass between mid littoral and sub littoral zones in two seasons. The results show 6 common species that in summer and winter were observed species of Rhodophyceae: muscoides Acanthophora – Laurensia papillosa - Gracilaria corticata and 2 species Phaeophyceae: Cystoseira sp. and Padina sp. and one species of Chlorophyceae: Caulerpa sp.In addition the average of biomass computing in mid and low intertidal zones in studying within two seasons identified in both seasons that the highest average of biomass (953.1 g/m2) belongs to padina sp in third station in summer and lowest average of biomass (0. 5 g/m2) belongs to champia parvula in second station in winter.