Fig. 4

Fit of the neutral models for prokaryotic communities in each estuary during the winter or summer cruise with the metacommunity in each estuary as the source. Archaeal ZOTUs that occurred more frequently than the model prediction are shown in red, while those occurred less frequently than predicted are shown in green. Dashed lines represent 95% confidence intervals around the model prediction and the archaeal ZOTUs fall within the confidence intervals are considered as neutrally distributed and shown in orange. Bacterial ZOTUs are shown in grey. R² values present the goodness of model fitting, ranging from 0 (no fit) to 1 (perfect fit). The histograms show cumulative relative abundances of three categories of archaeal ZOTUs.