Pigments, phytoplankton and its production parameters in the Obskaya Guba and adjacent Kara Sea in the latest September 2007 ...

• Main Authors: Sukhanova, Irina N, Flint, Mikhail V, Mosharov, SA, Sergeeva, V M
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2011
• Subjects: Multiple investigations; AMK54; Akademik Mstislav Keldysh; Archive of Ocean Data ARCOD; Kara Sea; ob river; Obskaya Guba
• Online Access: https://dx.doi.org/10.1594/pangaea.767374; https://doi.pangaea.de/10.1594/PANGAEA.767374

Material was collected in the Ob River estuary and the adjacent shallow Kara Sea shelf between 71°14.0'N and 75°33.0'N at the end of September 2007. Latitudinal zonation in phytoplankton distribution was demonstrated; this zonation was determined by changes in salinity and concentration of nutrients. Characteristic of the phytocenosis in the southern desalinated zone composed of freshwater diatom and green algae species were high population density (1500000 cells/l), biomass (210 ?g C/l), chlorophyll concentration (4.5 ?g/l), and uniform distribution in the water column. High primary production (~40 ?g C/l/day) was recorded in the upper 1.5 m layer. The estuarine frontal zone located to the north had a halocline at depth 3-5 m. Freshwater species with low abundance (250000 cells/l), biomass (24 ?g C/l), and chlorophyll concentration (1.5 ?g/l) dominated above the halocline. Marine diatom algae, dinoflagellates, and autotrophic flagellates formed a considerable part of the phytocenosis below the halocline; ... : Supplement to: Sukhanova, Irina N; Flint, Mikhail V; Mosharov, SA; Sergeeva, V M (2010): Structure of the phytoplankton communities and primary production in the Ob River estuary and over the adjacent Kara Sea shelf. Translated from Okeanologiya, 2010, 50(5), 785-800, Oceanology, 50(5), 743-758 ...