MOESM1 of Molecular biogeography of planktonic and benthic diatoms in the Yangtze River

Additional file 1: Figure S1. Rarefaction curves of diatom richness for 279 samples. Figure S2. Phylogenetic distribution of reference sequence and abundant OTUs. Figure S3. Alpha diversity index per diatom community for each sample type. Figure S4. Nonmetric multidimensional scaling diagram of Bray-Curtis dissimilarities between diatom communities for all samples. Figure S5. ANOSIM statistics concerning differences in diatom communities within and between sample types. Figure S6. Diatom genera exhibiting significant seasonal differences in water (a) and sediment (b) samples. Figure S7. Spearman relationships between diatoms and dissolved carbon dioxide. Figure S8. Biogeographical distribution of diatoms at class level throughout the mainstream of the Yangtze for: (a) water-spring, (b) water-autumn, (c) sediment-spring, and (d) sediment-autumn samples. Figure S9. Proportion of indicator diatoms in each sample type obtained using indicator taxa analysis at Class (a), Order (b), Family (c), and Genus (d) levels. Figure S10. Biogeographical distribution of ecological guilds throughout the mainstream of the Yangtze River. Figure S11. Distance-decay relationships between community similarity and geographic distance for water (a) and sediment (b) samples. Figure S12. Variation in community composition explained by environmental, spatial, and spatially structured environmental components. Figure S13. LEfSe cladogram of planktonic (a) and benthic (b) diatom communities for the three channel slope regions. Figure S14. Relationships between Shannon diversity and TN:TP for water-spring (a), water-autumn (b), sediment-spring (c), and sediment-autumn (d) samples. Distance relationship of TN:TP for sampling sites along the mainstream (e). Figure S15. Significant differences in abundance of benthic diatoms upstream and downstream of Xiluodu Dam (a) and Three Gorges Dam (b). Table S1. Numbers of Indicator species and Top Indicator species across sample sites. Table S2. Partial Mantel test for Spearman correlations between community similarity and geographic and environmental distances. Table S3. Effects of selected factors on diatom community using canonical correspondence analysis.