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.