Fig. 1. Geographical location and in-situ samples of Lake Taihu

Fig. 2. Calculation of phytoplankton phenology metrics

Fig. 3. Spatial distribution of the number of blooms in Lake Taihu from 2003 to 2018

Fig. 4. Spatial distribution of phytoplankton growth start date in Lake Taihu from 2003 to 2018

Fig. 5. Spatial distribution of bloom start date in Lake Taihu from 2003 to 2018

Fig. 6. Spatial distribution of chla concentration peak in Lake Taihu from 2003 to 2018

Fig. 7. Spatial distribution of average bloom duration in Lake Taihu from 2003 to 2018

Fig. 8. Spatial distribution of total bloom duration in Lake Taihu from 2003 to 2018

Fig. 9. Regional division of Lake Taihu based on phytoplankton phenology metrics from 2003 to 2018

Fig. 10. Box plots of different phytoplankton phenology metrics in various regions of Lake Taihu (blooming events)

Fig. 11. Box plots of different phytoplankton phenology metrics in various regions of Lake Taihu (non-blooming events)

Fig. 12. Line chart of three phenology metrics (phytoplankton growth start date, peak Chla occurrence date, Chla concentration peak) and corresponding mean LSWT from 2003 to 2018

Fig. 13. Bloom start date and peak Chla occurrence time under LSWT from 2003 to 2018 (blooming events)

Fig. 14. Phytoplankton growth start time and peak Chla occurrence time under LSWT from 2003 to 2018 (non-blooming events)