Table 1: Diatom distribution in surface sediments of the Kara Sea ...

• Main Author: Polyakova, Ye I
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: Event label; DEPTH, sediment/rock; Salinity; Diatoms freshwater; Multiple investigations; Dredge; Bucket water sampling; Sampling gear, diverse; BP00; BP97; BP99; Akademik Boris Petrov; Siberian River Run-Off SIRRO; Kara Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.804559; https://doi.pangaea.de/10.1594/PANGAEA.804559

Diatom assemblages in 62 surface sediment samples from the outer Ob and Yenisei estuaries and the adjacent inner Kara Sea shelf were examined in relation to environmental conditions. Concentrations of diatoms reflect the biological productivity of surface waters along with specific water mass processes of diatom valve deposition in the zone of intermixing of riverine and marine waters. An inverse relationship between total concentration of diatom valves in sediments and surface water salinity is found. Extremely high abundances of diatom valves (up to 82.4 million valves/g sediment) are observed in the outer Ob and Yenisei estuaries (salinity < 5) and are related to a zone with rapid deposition of riverine organic matter. The overall distribution pattern of freshwater diatoms indicates the inflow of river water onto the shelf and follows the general pattern in surface water salinity. A linear regression between average summer surface water salinity and relative proportions of freshwater diatoms reveals a ... : Supplement to: Polyakova, Ye I (2003): Diatom assemblages in surface sediments of the Kara Sea (Siberian Arctic) and their relationship to oceanological conditions. In: Stein, R; Fahl, K; Fütterer, D K; Galimov, E M & Stepanets, O V (eds.), Siberian River Run-off in the Kara Sea: Characterisation, Quantification, Variability, and Environmental Significance, 488 pp. Proceedings in Marine Sciences, Elsevier, Amsterdam, 6, 375-399 ...