Extended Data Fig. 7: Redundancy analysis (RDA) ordination plots of the seasonal distribution of SAR11-IIIb species in six lakes in relation to environmental variables.
From: Ecophysiology and global dispersal of the freshwater SAR11-IIIb genus Fontibacterium
Redundancy analysis (RDA) biplots showing the relationship between the dominant SAR11-IIIb species (red circles), seasonal sampling points (yellow circles), and significant environmental variables (arrows). Key environmental factors were identified through forward selection (P < 0.05). The model was statistically significant (ANOVA, P < 0.001, 999 permutations). Abbreviations: Temp, water temperature (°C); Chla, chlorophyll a (µg l−1); Total.Chl, Total chlorophyll (µg l−1); SRP, soluble reactive phosphorus (µg l⁻¹); NO₃, nitrate (mg l−1); NO₂, nitrite (mg l−1); npoc, non-purgeable particulate organic carbon; TP, total phosphorus (µg l−1); TN, total nitrogen (mg l−1); DOC, dissolved organic carbon (mg l−1); R-Si, dissolved reactive silica (mg l−1); DO, dissolved oxygen (mg l−1). Raw data can be found in Supplementary Tables 7 and 9, results of statistical tests in Supplementary Table 9.
