Nöthig, Eva-Maria; Okolodkov, Yuri; Larionov, Viktor V; Makarevich, Pavel R (2012): Table 3: Comparison of freshwater species in Ob and Yenisei during the 1997 cruise [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.804513, Supplement to: Nöthig, E-M et al. (2003): Phytoplankton distribution in the inner Kara Sea: A comparison of three summer investigations. 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, 163-183
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Abstract:
Phytoplankton biomass distribution (chlorophyll a, chl. a) and species composition (cell numbers) were investigated during three expeditions to the Kara Sea with "Akademik Boris Petrov" (BP) in 1997, 1999, and 2000. The distribution of biomass in the estuaries of Ob and Yenisei showed a similar range in 1997 (0.2 to 3.2 µg/l) and 2000 (0.4 to 3.5 ug/l); higher chl. a concentrations during these two years were found in Yenisei than in Ob. In 1999, phytoplankton biomass in the Ob and Ob Estuary was much higher than in 1997 and 2000, with maximum values above 10.0 ug chl. a/l. In 1999, biomass in Yenisei was lower (1.5 to ~5 ug/l) than in Ob but slightly higher than in 1997 and in 2000. During the expedition in 2000, the research area extended farther to the north, here, lowest phytoplankton biomass during all three years was found. Typical summer values for integrated chl.a biomass (surface to bottom) ranged between 6 and 20 mg m**-2.
Strong differences existed in species composition in both rivers, the estuaries, and the open Kara Sea. In general, three or four different populations could be distinguished in surface waters: (1) freshwater diatoms together with bluegreen algae in both rivers, (2) centric and small pennate diatoms mainly brackish species in the estuaries, (3) north of 74°N, brackish/marine species dominated, i.e. in 1999 Thalassiosira cfpunctigera and Chaetoceros spp prevailed in the phytoplankton bloom in Ob. (4) At the northernmost, almost marine stations, a region with a more heterogeneous composition of unicellular plankton was encountered. We assume, we found different seasonal signals of phytoplankton development during 1997/2000 and 1999, respectively. However, the yearly fluctuation of freshwater runoff of both rivers seems to have the strongest influence on the timing and duration of phytoplankton blooms, species compositions and biomass standing stocks during summer.
Project(s):
Siberian River Run-Off (SIRRO)
Coverage:
Median Latitude: 72.724957 * Median Longitude: 75.940999 * South-bound Latitude: 72.093160 * West-bound Longitude: 73.147667 * North-bound Latitude: 73.650333 * East-bound Longitude: 81.481160
Date/Time Start: 1997-09-14T09:59:00 * Date/Time End: 1997-09-25T11:18:00
Minimum Elevation: -29.0 m * Maximum Elevation: -10.0 m
Event(s):
BP97-10 * Latitude: 72.502833 * Longitude: 74.080833 * Date/Time: 1997-09-14T09:59:00 * Elevation: -15.0 m * Location: Kara Sea * Campaign: BP97 (KaraSea97) * Basis: Akademik Boris Petrov * Method/Device: Sampling gear, diverse (DIVERSE) * Comment: CTD-1,PN-4,PHN-1,RS-3,LVS-3,OG-3,LBS-3,MUC-2,GC500-1,BD-1
BP97-12 * Latitude: 72.170333 * Longitude: 74.293667 * Date/Time: 1997-09-15T01:06:00 * Elevation: -13.0 m * Location: Kara Sea * Campaign: BP97 (KaraSea97) * Basis: Akademik Boris Petrov * Method/Device: Sampling gear, diverse (DIVERSE) * Comment: CTD-1,RS-3,LVS-3,OG-3,LBC-1,MUC-2
BP97-17 * Latitude: 72.688667 * Longitude: 73.730667 * Date/Time: 1997-09-15T18:01:00 * Elevation: -20.0 m * Location: Kara Sea * Campaign: BP97 (KaraSea97) * Basis: Akademik Boris Petrov * Method/Device: Sampling gear, diverse (DIVERSE) * Comment: CTD-1,PHN-1,RS-3,LVS-3,OG-3,MUC-2,BD-2
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Species | Species | Nöthig, Eva-Maria | |||
| 3 | Area/locality | Area | Nöthig, Eva-Maria |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
88 data points
Data
| 1 Event | 2 Species | 3 Area |
|---|---|---|
| BP97-12 | Oscillatoria cf. chlorina | The Ob Inlet |
| BP97-12 | Dictyosphaerium sp. | The Ob Inlet |
| BP97-12 | Monoraphidium cf. contortum | The Ob Inlet |
| BP97-12 | Aulacoseira granulata | The Ob Inlet |
| BP97-12 | Synedra cf. acus | The Ob Inlet |
| BP97-12 | Colonial Chlorophyta | The Ob Inlet |
| BP97-10 | Lyngbya cf. limnetica | The Ob Inlet |
| BP97-10 | Oscillatoria cf. chlorina | The Ob Inlet |
| BP97-10 | Dictyosphaerium sp. | The Ob Inlet |
| BP97-10 | Monoraphidium cf. contortum | The Ob Inlet |
| BP97-10 | Asterionella formosa | The Ob Inlet |
| BP97-10 | Aulacoseira spp. | The Ob Inlet |
| BP97-10 | Synedra cf. acus | The Ob Inlet |
| BP97-17 | Dictyosphaerium sp. | The Ob Inlet |
| BP97-17 | Pediastrum boryanum | The Ob Inlet |
| BP97-17 | Scenedesmus quadricauda | The Ob Inlet |
| BP97-17 | Aulacoseira spp. | The Ob Inlet |
| BP97-48 | Lagerheimia genevensis | The Ob Inlet |
| BP97-48 | Monoraphidium cf. contortum | The Ob Inlet |
| BP97-32 | Lyngbya cf. limnetica | Yenisei Bay |
| BP97-32 | Actinastrum sp. | Yenisei Bay |
| BP97-32 | Crucigenia sp. | Yenisei Bay |
| BP97-32 | Monoraphidium cf. contortum | Yenisei Bay |
| BP97-32 | Oocystis sp. | Yenisei Bay |
| BP97-32 | Scenedesmus quadricauda | Yenisei Bay |
| BP97-32 | Asterionella formosa | Yenisei Bay |
| BP97-32 | Aulacoseira subarctica | Yenisei Bay |
| BP97-32 | Fragilaria crotonensis | Yenisei Bay |
| BP97-32 | Synedra cf. acus | Yenisei Bay |
| BP97-30 | Anabaena cf. flos-aquae | Yenisei Bay |
| BP97-30 | Anabaena sp. | Yenisei Bay |
| BP97-30 | Lyngbya cf. limnetica | Yenisei Bay |
| BP97-30 | Actinastrum sp. | Yenisei Bay |
| BP97-30 | Dictyosphaerium sp. | Yenisei Bay |
| BP97-30 | Monoraphidium cf. contortum | Yenisei Bay |
| BP97-30 | Oocystis sp. | Yenisei Bay |
| BP97-30 | Crucigenia quadrata | Yenisei Bay |
| BP97-30 | Scenedesmus quadricauda | Yenisei Bay |
| BP97-30 | Asterionella formosa | Yenisei Bay |
| BP97-30 | Aulacoseira subarctica | Yenisei Bay |
| BP97-30 | Synedra cf. acus | Yenisei Bay |
| BP97-55 | Lyngbya cf. limnetica | NE of the Ob Inlet |
| BP97-58 | Colonial Cyanophyta | NE of the Ob Inlet |
| BP97-58 | Asterionella formosa | NE of the Ob Inlet |