Sukhanova, Irina N; Flint, Mikhail V; Mosharov, SA; Sergeeva, V M (2011): Pigments, phytoplankton and its production parameters in the Obskaya Guba and adjacent Kara Sea in the latest September 2007 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.767374, Supplement to: Sukhanova, IN et al. (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, https://doi.org/10.1134/S0001437010050115
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Abstract:
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; community characteristics were two-fold lower as compared with the upper layer. Maximal values of primary production (~10 ?g C/l/day) were recorded in the upper 1.5 m layer. The phytocenosis in the seaward zone was formed by marine alga species and was considerably poorer as compared with the frontal zone. Assimilation rates of carbon per chlorophyll a at the end of the vegetation season within the studied area were low, average 0.4-1.0 ?g C/?g Chl/hour in the upper layer and 0.03-0.1 ?g C/?g Chl/hour below the pycnocline.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 73.630750 * Median Longitude: 72.992514 * South-bound Latitude: 71.248000 * West-bound Longitude: 72.513000 * North-bound Latitude: 75.560000 * East-bound Longitude: 73.955000
Date/Time Start: 2007-09-25T05:00:00 * Date/Time End: 2007-09-30T15:55:00
Event(s):
AMK54-4993 * Latitude: 71.248000 * Longitude: 72.865000 * Date/Time: 2007-09-25T05:00:00 * Elevation: -22.0 m * Location: Obskaya Guba * Campaign: AMK54 * Basis: Akademik Mstislav Keldysh * Method/Device: Multiple investigations (MULT)
AMK54-4994 * Latitude: 71.733000 * Longitude: 72.788000 * Date/Time: 2007-09-27T14:52:00 * Elevation: -16.0 m * Location: Obskaya Guba * Campaign: AMK54 * Basis: Akademik Mstislav Keldysh * Method/Device: Multiple investigations (MULT)
AMK54-4995 * Latitude: 72.167000 * Longitude: 73.238000 * Date/Time: 2007-09-27T21:57:00 * Elevation: -11.0 m * Location: Obskaya Guba * Campaign: AMK54 * Basis: Akademik Mstislav Keldysh * Method/Device: Multiple investigations (MULT)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Sukhanova, IN; Flint, MV; Mosharov, SA et al. (2010): (Table 1) Abundance and biomass of diatom algae, dinofiagellates, green algae, and flagellates and their percentages in total phytoplankton abundance and biomass in the Obskaya Guba and adjacent Kara Sea in the latest September 2007. https://doi.org/10.1594/PANGAEA.765506
- Sukhanova, IN; Flint, MV; Mosharov, SA et al. (2010): (Table 2a) Depth with 1% of photosynthetic active radiation in the Obskaya Guba and adjacent Kara Sea in the latest September 2007. https://doi.org/10.1594/PANGAEA.765524
- Sukhanova, IN; Flint, MV; Mosharov, SA et al. (2010): (Table 2b) Primary production, chlorophyll a concentration, assimilation rate of carbon per chlorophyll a, and ratio of phaeopigments to chlorophyll a in the Obskaya Guba and adjacent Kara Sea in the latest September 2007. https://doi.org/10.1594/PANGAEA.765544
- Sukhanova, IN; Flint, MV; Mosharov, SA et al. (2010): (Table 4) Integrated biomass, chlorophyll a and phaeopigments contents, and primary production in the water column in the Obskaya Guba and adjacent Kara Sea in the latest September 2007. https://doi.org/10.1594/PANGAEA.767373