Reconstruction of the temperature regime and the hydrologic parameters associated with it by using data on diatomic complexes from Lake Glubokoe

Diatomic complexes from Upper Holocene sediments in Lake Glubokoe (Moscow Province) are analyzed. A unified reconstruction method is first applied to three most important hydrologic characteristics: temperature, cation-anion balance, and the concentration of biogenic substances. The species composition of diatomic complexes is studied with account for the bioindication significance of each species in terms of the above-listed parameters of the aquatic environment. A graphic method elaborated by L. V. Razumovskii is used to compare the structure of different diatomic complexes. A cyclic recurrence is revealed in the lake temperature regime over the last centuries of the lake existence. It is found that in the epoch of neosedimentogenesis, variations in all parameters under study are correlated.