The phytoplankton community structure is affected by both ecological and spatial factors. Influences of these two factors on phytoplankton are still poorly understood. Here, the relative effects of spatio-temporal variations on the structuring and community of phytoplankton were examined in eight sites along Ismailia canal during wet winter and dry summer seasons, 2018. A total of 58 taxa were identified, belonging to five taxonomical groups, phytoplankton had an abundance ranging from 56,906 ind. L⁻¹ in winter to 122,418 ind. L⁻¹ in summer. Bacillariophyta was the leading and most dominant phyla representing about 45% of the total number of individuals owing to the great flourishing of Synedra ulna, Cyclotella kutzingiana, Cyclotella meneghiniana throughout the year. Spatially, sites 1, 2 and 7 showed the highest phytoplankton abundance, whereas site 6 showed the lowest community. Pearson correlation and Canonical correspondence analysis indicated that nitrate had a positive correlation with the phytoplankton community, however TDS showed a negative correlation with the algal community and silicate showed a positive correlation with Bacillariophyta. High relative Palmer’s Index scores were recorded in most of the sampling sites ranged from 13 to 21 particularly during summer, that coincides with Shannon–Weiner index results which indicating Ismailia canal suffers from organic pollution in most of the sampling sites.

浮游植物群落结构受生态和空间因素影响。这两个因素对浮游植物的影响仍然知之甚少。在此，在2018年冬季潮湿和干燥的夏季，在伊斯玛利亚运河沿岸的八个地点，研究了时空变化对浮游植物结构和群落的相对影响。共确定了58个分类单元，属于五个分类学类别，浮游植物丰富度范围为56,906印度卢比。冬季为L ^-1至122,418 ind。夏季为L ^-1。由于尺骨Synedra ulna，Cyclotella kutzingiana，一年四季都出现了青梅癣菌。在空间上，地点1、2和7显示出最高的浮游植物丰度，而地点6显示出最低的群落。皮尔逊相关性和典范对应分析表明，硝酸盐与浮游植物群落呈正相关，而TDS与藻类群落呈负相关，而硅酸盐与芽孢杆菌则呈正相关。多数采样点记录的相对帕尔默指数得分较高，范围从13到21，特别是在夏季，这与Shannon-Weiner指数结果吻合，这表明伊斯梅利亚运河在大多数采样点都受到了有机污染。