In the present study we investigated the effects of restoration (northern coast) and anthropization (southern coast) on the spatial and seasonal distribution of ciliates communities in relation to environmental factors in coastal Sfax area. The low pH value was attributed to anthropogenic waste inputs around the southern coast. The nutrients concentrations, recorded in the southern coast, were higher than those recorded in the northern coast. Analyses demonstrated that ciliates communities’ structures showed significant differences between the northern and southern parts of the sampling coast (F = 6.54, df = 12, p < 0.001). Ciliates diversity was significantly more important in the southern coast (65 taxa) than in the northern coast (40 taxa). The ciliates abundance was 6.33 $\times 10^2$ $\pm 3.38\times$ 10² cells L⁻¹ in northern stations. The abundance of ciliates was high over the whole southern coast (12.12$\times 10^2$ $\pm 3.78\times$ 10² cells L⁻¹), which increased during summer (27 $\times$ 10² cells L${}^{-1}$at station 1), and decreased during the spring (3 $\times$ 10² cells L${}^{-1}$at station 3). Tintinnids abundance was higher than naked ciliates abundance reported for all seasons, both in the north and south Sfax coast. Some tintinnids species, like Tintinnopsis beroidea, Tintinnopsis nana and Tintinnopsis parvula attained important abundance in the southern area, because they are able to survive under adverse conditions owing to its adaptive strategies. Tintinnidium balechi was a dominant and common species, with high occurrence and represented an important contributor to the ciliate communities. Pearson’s correlation coefficients showed that the seasonal ciliates variations were significantly correlated with nutrients (total nitrogen with tintinnids and orthophosphate plus total phosphate with naked ciliates).

在本研究中，我们调查了恢复（北海岸）和人类活动（南海岸）对纤毛虫群落的空间和季节分布的影响，这些影响与沿海斯法克斯地区的环境因素有关。pH值偏低归因于南部海岸附近的人为废物输入。南部沿海地区记录的养分含量高于北部沿海地区。分析表明，纤毛虫群落的结构在采样海岸的北部和南部之间显示出显着差异（F = 6.54，df = 12，p <0.001）。纤毛虫的多样性在南部海岸（65个分类单元）比北部海岸（40个分类单元）重要得多。纤毛虫丰度为6.33$\times \mathrm{1个}{0}^2$ $\pm 3。38\times$北站有10 ^2个小区L ^-1。整个南部海岸的纤毛虫数量很高（12.12$\times \mathrm{1个}{0}^2$ $\pm 3。78\times$10 ²细胞L ^-1），在夏季增加（27$\times$10 ²格L${}^{-\mathrm{1个}}$在第1站），并在春季下降（第3站） $\times$10 ²格L${}^{-\mathrm{1个}}$在3号车站）。无论在北部还是南部的斯法克斯海岸，所有季节的丁丁虫数量都高于裸纤毛虫的数量。某些Tintinnids物种（如Tintinnopsis beroidea，Nin Tintinnopsis nana和Tintinnopsis parvula）在南部地区获得了重要的丰度，因为它们的适应性策略能够在不利条件下生存。丁丁橡胶是纤毛虫常见和常见的物种，发病率很高，是纤毛虫群落的重要贡献者。皮尔森的相关系数表明，季节性纤毛虫的变化与养分显着相关（总氮与丁腈和正磷酸盐，总磷酸盐与裸纤毛虫）。