Paleolimnological studies using biological remains of diatoms in sediment cores can provide information for the reconstruction of historical water chemistry and climatic changes. The trend of recent diatom studies at brackish lakes in Japan were complied as follows.
(l) Methodological and taxonomical discussion
(2) Annually laminated sediments
(3) Quantitative reconstruction of paleoenvironments
(4) Database of living diatom assemblages for paleolimnological studies