Sorokin, Yury I; Burkatskii, O N (2007): Contents of labile sulfides in the upper layer bottom sediments and parameters of zoobethos density and composition in the central part of the Sea of Azov [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.769951, Supplement to: Sorokin, YI; Burkatskii, ON (2007): The contents of labile sulfides in the bottom sediments of the central part of the Sea of Azov: Impact on benthic communities. Translated from Okeanologiya, 2007, 47(5), 729-735, Oceanology, 47(5), 679-684, https://doi.org/10.1134/S0001437007050104
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Abstract:
At 17 stations in the central part of the Sea of Azov contents of labile (acid-soluble) sulfides were determined in the upper layer (0-3 cm) of bottom sediments. At 14 of these stations contents of sulfides exceeded 300 mg S/l of wet sediment; at seven stations contents of sulfides varied from 420 to 720 mg S/l of wet sediment, or 0.1-0.2% of dry weight. At other three stations, where neutral matter such as shells and sand prevailed in samples, contents of sulfides varied from 80 to 110 mg S/l of wet sediment. At these stations high density and species diversity of benthic fauna was retained. At other stations with labile sulfide contents over 200-300 mg S/l benthos biomass decreased by one or two orders of magnitude. At most of them it was less than 3 g/m**2 and small gastropod Hydrobia tolerant to sulfides dominated. Obtained data show that in the central part of the Sea of Azov reduced sediments with high contents of labile sulfides migrate towards the bottom surface, which conforms to high intensity of hydrogen sulfide formation process caused by bacterial sulfate reduction. The study considers environmental effects of sulfide contamination in the upper layer of bottom sediments in the Sea of Azov as a key factor causing recurrent hypoxy in the near-bottom layers of water, suffocation occurrence, and progressive depletion of benthic and pelagic fauna.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 46.231000 * Median Longitude: 37.084000 * South-bound Latitude: 46.048000 * West-bound Longitude: 36.850000 * North-bound Latitude: 46.406000 * East-bound Longitude: 37.519000
Minimum DEPTH, sediment/rock: 0.015 m * Maximum DEPTH, sediment/rock: 0.015 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Depth, top/min | Depth top | m | Sorokin, Yury I | ||
| 7 | Depth, bottom/max | Depth bot | m | Sorokin, Yury I | ||
| 8 | Sediment type | Sediment | Sorokin, Yury I | |||
| 9 | Sulfur in sulfide | S in S2- | mg/l | Sorokin, Yury I | Iodometric chemical method | of wet sediment |
| 10 | Sulfur bound in sulfide | S (S2-) | % | Sorokin, Yury I | Iodometric chemical method | of dry weight |
| 11 | Zoobenthos, biomass | Zoobenthos biom | mg/m2 | Sorokin, Yury I | Benthic biomass, wet weight | |
| 12 | Species | Species | Sorokin, Yury I | dominant | ||
| 13 | Percentage | Perc | % | Sorokin, Yury I | Calculated | dominant species of total biomass |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
128 data points