Abstract:

This paper analyzed the diatoms in the surface sediments of Disko Bugt (bay) in West Greenland and totally 78 species and varieties of diatom are found. The surface sediment diatoms of Disko Bugt (bay) are divided into two assemblages by correspondence analysis. Assemblage I,Fragilariopsis cylindrus-Fragilariopsis oceanica is located in the southern coast and the center of Disko Bugt (bay). Assemblage Ⅱ,Detonula confervaceae resting spore-Thalassiosira nordenskioeldii,is situated in the northern part of Disko Bugt (bay),of which the temperature and salinity of sea-surface are lower. Furthermore,due to the differences in the surface circulation and water depth,Assemblage I is divided into two sub-assemblages. Assemblage Ia,F. cylindrus-F. oceanica-Pauliella taeniata,appears in the coastal area. Assemblage Ib,F. cylindrus-F. oceanica-Thalassiosira antarctica var. borealis resting spore-Thalassiosira cf. antarctica var. borealis,is located in the center of Disko Bugt (bay).