Algae community structure and relation to environmental factors in the Hulanhe Wetland, Northeast China

The distribution characteristic of algae community was evaluated in eight sampling sites based on a monthly survey during May to October 2020 and 2021 in the Hulanhe Wetland, Northeast China. Algae and water environmental factors including water temperature (T), pH, Conductivity (Cond.), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total organic carbons (TOC), total phosphorus (TP) and nitrogen (TN) were investigated, and a total of 216 taxa were identified by microscope. The algae community was dominated by Bacillariophyta, Chlorophyta and Euglenophyta. Species such as Melosira granulate, Cyclotella meneghiniana, Navicula cryptocephala and Pandorina morum were the most common species. Significant difference of the algae composition and abundance were found in the different sampling sites. Species composition in H8 were different variously with other sites, provide a good chance for us to study the tolerance of the species, compared with other sites, several pollution indicator species were observed. According to canonical correspondence analysis (CCA), TN and TP were the main environmental factors affecting the distribution of algae. Furthermore, temperature and dissolved oxygen were also important to the algae community. It is suggested that the relationship between algae community and environmental factors can point to new directions in future studies on the water quality and habitat conditions in a wetland.