Fig. 3 | Scientific Reports

Fig. 3

From: Hydrology drives phytoplankton succession and productivity coupling in plateau hydropower reservoirs with implications for ecosystem health management

Fig. 3

Structural composition of phytoplankton and principal component analysis with other physicochemical indices. (a) Structural composition of phytoplankton in different hydrological periods, (b) Principal Component Analysis (PCA) biplot illustrating the relationships between environmental variables and sampling periods across different seasons. The first two principal components (Dim1 and Dim2) explain 32.8% and 24.6% of the total variance, respectively. Seasons/Periods abbreviations: Dry Season (DS), RP (Rainy Period), Wet Season (WS), falling period (FP). Environmental variables: Total Nitrogen (TN), Total Phosphorus (TP), Ammonia Nitrogen (NH₃-N), pH, Secchi Depth (SD), gross primary productivity (GPP), Water Temperature (WT).

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