摘要
在最近的年里， dinoflagellate 夜光虫 miliaris 的季节的花蕾出现了在北阿拉伯的海(NAS ) 开水。这研究从 NAS 的绿夜光虫的一个季节的花蕾提供细菌的第一描述(盐沼草 Porteresia coarctata 的 20 产地沿着 Bakkhali 河口的海岸被调查，艇长 Bazar，从 1 月的孟加拉国到 2006 年 12 月。射击 P 的密度。coarctata 到季节被影响并且被发现更高(> 2 500 shoots/m2 ) 在里面在季风季节季风以后、最小；植物在季风前期间在植物的繁殖是特别地活跃的。未葬生物资源与在这个河口的暴露的相比沿着保护的海岸是更大的。地下的生物资源更高(7.75269.53 g DW/m2 ) 上面比那磨擦了(2.20114.75 g DW/m2 ) 。P 的站的庄稼。coarctata 显示出一种否定关系(R =0.77；P < 0.05 ) 与沉积率，当季节的活动影响了沉积时。记录沉积率更低(6.09
In recent years, seasonal blooms of the dinoflagellate Noctiluca miliaris have appeared in the open-waters of the northern Arabian Sea （NAS）. This study provides the first characterization of bacteria from a seasonal bloom of green Noctiluca ofNAS （20°N-17°N and 64°E-70°E）, during the spring-inter-monsoon cruise ofSagar Sampada 253, in March 2007. Bacterial growth as assessed by most-probable number （MPN） and plate counts, revealed ＇variable-physiotypes＇ over a wide range of salinities （0%-25% w/v NaC1）, pH levels （5-8.5）, and organic nutrient strengths, in comparison to non-bloom waters. MPN indices of bacteria in surface waters of bloom stations ＊DWK and ＊PRB, corresponded to （3.08-4.41）×103 cells/mL at 3.5% NaC1 （w/v）, and （2.82-9.49）× 102 cells/mL at 25% （w/v） NaC1 in tryptone-yeast extract broth （TYE）. Plate counts were （1.12-4） × 106 CFU/mL at 0% （w/v） NaC1, （1.28-3.9） × 106 CFU/mL at 3.5% （w/v） NaC1, and （0.4- 7）×104 CFU/mL at 25% NaC1 （w/v） on TYE. One-tenth-strength Zobell＇s gave （0.6-3.74）× 105 CFU/mL at pH 5 to （3.58-7.5）× 105 CFU/mL at pH 8.5. These bacteria were identified to the genera Bacillus, Cellulomonas, Staphylococcus, Planococcus, Dietzia, Diergibacillus, Micrococcus, Sporosarcinae, Leucobacter, and Halomonas. The identity of three strains （GUFBSS253N2, GUFBSS253N30, and GUFBSS253N84） was confirmed through 16S rDNA sequence homology as Bacillus cohnii, Bacillusflexus, and Bacillus cereus. The -2-3-fold higher plate counts of culturable bacteria from the open-waters of the NAS indicate that these bacteria could critically determine the biogeochemical dynamics of the bloom and its milieu. The role of these bacteria in sustaining/terminating the bloom is under evaluation.
