An inventory was made during the period from March 2014 to March 2016 in a Ramsar wetland, it’s the Salt Lake (Sebkhet) of Bazer, Setif region, Algeria, to study inventories of phytoplanktons and to understand the structure and the distribution of micro-algae groups according to season or function of the biotic and also physicochemical parameters of the environment. Water samples are collected bi-monthly and preserved by a special technique to conserve microelements and to better identify phytoplankton. 33 genera were identified using an optical microscope, these genera belong to 13 orders, 18 families and 6 classes: Zygophylaceae, Chlorophyceae, Diatomophyceae, Cyanophyceae, Euglenophyceae and Dinophyceae, where, the Diatomophyceae class is the most important with 12 species or 37.50%, 5 families or 27.77% and 3 orders or 23.08%.What’s more, 21, 21% of species are considered toxic, represented by 7 genera; in which 3 genera belonging to the Dinophyceae while 4 genera belonging to the Cyanophyceae. In addition, the statistical analyzes of these groups such as AFC, and PCA which were carried out using R software, confirms that the phytoplankton populations and distribution are linked to abiotic conditions, and vary with the seasons and depend both on the physicochemical factors of the environment such as the pH and temperature. These phytoplankton groups are bio-indicators of pollution, of which we noted that despite the importance of this area but it is polluted and required long-term protection.

Background: Wetlands are the highly complex ecosystems due to various interactions between the components, where, the most iconic of ecological changes are the water birds. The current study was aimed to examine the interactions between the water birds diversity, abundance and the abiotic factors in Sebkhet Bazer. Methods: The investigation was conducted between March 2013 and December 2014 in Sebkhet Bazer (Sétif, Algeria, 36°05'N and 5°45'E), by monitoring water birds abundance (grouped into 4: Anatidae, Rallidae, Phoenicopteridae and Shorebirds) and measuring the physico-chemical water parameters (depth, temperature, pH, salinity and vegetation cover). All statistical analysis was performed using the InfoStat software (2017), it was carried out in two steps, by testing of fixed linear models; first of the seasonal differences in water body variables and second of the seasonal differences in bird abundance for the 4 water bird groups. Result: The results showed that the physico-chemical parameters of water varied considerably from season to season. The four groups of birds reached their lowest abundance in summer, with Rallidae and Phonicopteridae being more abundant in spring, Anatidae in winter and Shorebirds in autumn, suggesting that this variation is attributed to changes in water body characteristics between the four seasons. Therefore, the abundance of the different water bird group could be used as an ecological indicator of this wetland’s characteristics. If these features are altered by climate change, the water bird community would be also affected.