Fig. 2

Relative abundances of major archaeal genera (with relative abundance ≥ 1% in at least one sample and average relative abundance ≥ 0.1% in all samples) in prokaryotic communities in four major estuaries across seasons and stations. Bold taxon names are the families the genera affiliated to. Low and medium present stations with corresponding salinity level. Refer to Fig. 1 for the meanings of the letters in the station IDs