2) Diatom analysis for KhqS Profile
Diatom data are also available for KhqS (Fig. S8). Twelve samples spanning the profile yielded 124 diatom species belong to 41 genera. The diatom assemblage in KhqS-D1 is dominated by the marine/brackish group (D. smithii , Nitzschiacocconeis, etc) accompanied by brackish planktonic C. stylorum , suggesting an estuary bay environment. In KhqS-D2, the dominance species quickly shift into freshwater assemblage (C. distingenda , Navicula spp.,Gomphonema spp., etc.), which may correlate with human occupation. At the top part of KhqS-D2 (end of “human affected”), the increased abundance of marine and/or brackish species (such as D. smithii ) present the intensive influence of marine inundation. KhqS-D3 is featured by abundant marine and/or brackish species (Actinoptychus spp., Coscinodiscus spp., C.stylorum ,M.sulcata, etc.) and rich fragments, similar to KHQ-D3, indicating a turbulence deposition condition.