Diatoms and Aquatic Palynomorphs in Surface Sediments of the White Sea Bays As Indicators of Sedimentation in Marginal Filters of Rivers
Oceanology(2016)
Abstract
Diatom algae, aquatic palynomorphs, and the grain-size of surface sediments from bays of the White Sea were investigated in a program dedicated to the study of marginal filters (MF) in the Severnaya Dvina, Onega, and Kem rivers. Three microalgal assemblages are established in surface sediments, which replace each other successively with distance from river mouths and are characterized by a gradual decrease in a share of freshwater species of diatoms and Chlorophyceae algae, significantly varying concentrations of marine diatoms and dinocysts due to changes in water salinity, grain-size composition of sediments, quantitative distribution of suspended particulate matter (SPM), and water productivity at different marginal filter stages.
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Key words
Bottom Sediment,Suspended Particulate Matter,Particulate Organic Carbon,River Runoff,Suspended Particulate Matter Concentration
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