Spatial and temporal characteristics of phytoplankton functional groups and relationship with water environment factors in Hailaer River
LIU Zixuan，WANG Yingying，ZHAO Chang，CHANG Changran，DOU Huashan，CHEN Xingyao，TAO Yulong，MA Chengxue*
1.College of Wildlife and Protected Area，Northeast Forestry University，Harbin 150040，China；2.Administration Bureau of the Hulun Lake National Nature Reserve of Inner Mongolia，Hailaer 021008，China
Abstract: To investigate the spatial and temporal characteristics of phytoplankton functional groups and their relationship with water environmental factors in eutrophic alkaline rivers in northern cold regions, the characteristics of phytoplankton functional groups including composition, biomass, spatial and temporal distribution and relationship with water environmental factors were surveyed in 14 sampling sites in the upper, middle and lower reaches of the Hailar River basin and two major tributaries in spring (May), summer (August) and autumn (September) of 2019 by a conventional method, and multivariate statistical analysis. The results showed that there were 80 phytoplankton species in 6 families in the Hailar River basin, with the significantly higher proportion of phytoplankton functional group C in biomass from the upstream to the downstream (P<0.05). The phytoplankton in the Hailar River was divided into 20 functional groups, groups C, D, MP and X2 being important functional groups, without significant seasonal changes in important phytoplankton functional groups in the Hailar River, showing seasonal succession of C+X2+D (spring)→X2+MP+D+C (summer)→D+C+MP (autumn).The Pearson linear correlation analysis and redundancy analysis of relationship between phytoplankton functional group and the main water environmental factors affecting the phytoplankton functional groups in the Hailar River watershed were pH, total phosphorus (TP), total nitrogen (TN), and water temperature (WT), all significantly and positively correlated with the important functions groups C, D, MP, and X2. Functional groups X2 and D were found to be positively correlated with pH, TP, TN, and WT, while functional group MP to be more correlated with TP and functional group C to be more correlated with TN. It was shown that there was small difference in the composition of phytoplankton functional groups in the rivers with different latitudes, nutrient levels, and pH, without significant spatial and temporal differences in the biomass of phytoplankton functional group composition in the Hailar waters. However, there were spatial differences relatively significant, and the significant increase in proportion phytoplankton with the increase in downstream pollution was observed in functional group C.
刘子暄, 王莹莹, 赵昶, 常畅然, 窦华山, 陈星瑶, 陶玉龙, 马成学. 海拉尔河浮游植物功能群时空特征及其与水环境因子的关系[J]. 大连海洋大学学报, 2023, 38(4): 689-697.
LIU Zixuan, WANG Yingying, ZHAO Chang, CHANG Changran, DOU Huashan, CHEN Xingyao, TAO Yulong, MA Chengxue. Spatial and temporal characteristics of phytoplankton functional groups and relationship with water environment factors in Hailaer River. Journal of Dalian Ocean University, 2023, 38(4): 689-697.
2023, Vol. 38 
