Fig. 1
From: Integrated biogeography of planktonic and sedimentary bacterial communities in the Yangtze River
OTUs displaying different distribution pattern in water and sediment samples in spring and autumn seasons. a and c Taxonomic dendrograms of the detected microbial communities displaying the OTU distributions (excluding OTUs with < 30% occupancy and < 0.01% relative abundance) along the different taxonomic branches (colored by phylum) in sediment samples (a) and water samples (c). Each node represents one OTU and its size corresponds to the square root of relative abundance. OTUs with significant (P < 0.05) difference between spring and autumn are colored red (abundant in autumn) and blue (abundant in spring). Non-associated OTUs shared by both seasons are colored white. Edges (i.e., lines connecting the nodes) show the path of taxonomy from the root to OTU level of the lowest possible assignment. Each phylum was classified into three groups regarding seasonal preference. The total OTU number and relative abundance in the most abundant phyla are labeled. b and d Co-correlation networks showing the significant associations (P < 0.01) between OTUs (excluding < 0.01% relative abundance) of the most populated phyla (coded with different colors) in sediment (b) and water (d) samples. Each node corresponds to one OTU, and the node size represents the square root of relative abundance. OTUs with significant (P < 0.05) difference in spring and autumn are plotted using diamonds (for autumn abundance) or triangle (for spring abundance). Circle represents insignificant OTUs shared by both seasons. Edges correspond to positive (red) and negative (blue). Spearman correlations between OTU pairs. OTU nodes with strong association have been pulled together using the edge-weighted spring-embedded algorithm