Survey of abundance and diversity of phytoplankton in coastal waters of Bandar Abbas-iran

Phytoplankton concentration and diversity investigated in the coastal waters of Bandar Abbas in four stations inclouding Bandar e Bahonar- Khoor e shilat- Khoor e mokhaberat and sooroo in winter 2009 and spring 2010. Sampling done monthly of water surface layer. In this study 48 genera of phytoplanktons related to Diatoms, Dinofllagellates, Bluegreen(Cyanophyceae), and Haptophyceae identified that diatoms with 31 genera (%64.59), followed by dinofllagellates with 13 genera (%27.08), blue-green alga with 3 genera (%6.25), and Haptophyceae with 1 genera (%2.08) were dominate phytoplankton community respectively. Amphora, Coscinodiscus and Pleurosigma were major dominate diatom genera. Gymnodinium, Prorocentrum and Peridinium were the major Dinoflagellates genera. Oscillatoria and Coccolithopher were the dominant genera of cyanophyceae and haptophyceae respectively. Dinoflagellates concentration mean was 10886 (Cell/litr) followed by diatoms with 5340 (Cell/lit), cyanophyceae 3070 (Cell/lit) and haptophyceae 391 (Cell/lit) reported. Margalleff biodiversity index rate for phytoplankton communites between 0.332 to 2.035 in Bandar Abbas coastal waters that the maximum rate of this index calculated for Bahonar station and minimum rate of this index reported for Khoor e Mokhaberat station. Non-parametric Kruskal-Walllis and Kolmogorov-Smirnov analyses showed that phytoplankton frequency in different month were statisticaly different (p<0.05). No significant statistical difference was found between different station (p>0.05).