Состав и структура микроплантона фрамовской ветви Норвежского течения

Abstract

The research reports the current taxonomic composition of microplankton and its biogeographical characteristics during the pre-winter period in the east of the Fram Strait, which is influenced by the West Spitsbergen branch of the Norwegian Current and called Fram Strait branch. Research materials are based on marine expeditions of R/V “Dalnie Zelentsy” during the second half of November in 2019 and 2021. The taxonomic composition includes new for this region records of warm-water species: dinoflagellates Corythodinium diploconus, Dinophysis ovata, Dinophysis tripos, Oxytoxum caudatum, Pronoctiluca rostrata, Podolampas palmipes, tintinnids Amphorellopsis tetragona, Ormosella haeckeli, Parundella caudata, the diatom Proboscia indica, the consortium of two organisms – the diatom Leptocylindrus mediterraneus and the flagellate Solenicola setigera. Most of records belong to the North Atlantic, and were previously noted as alien species in the Barents Sea, in the area of the North Cape Current.