Alkanes in plankton and bottom sediments of the Baltic Sea
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| Auteurs principaux: | , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
1981
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| _version_ | 1867169502686347264 |
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| author | Belyaeva, Alexandra N Bobyleva, Nadezhda V |
| author_facet | Belyaeva, Alexandra N Bobyleva, Nadezhda V |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Composition of alkanes present in total plankton was determined at two stations in the Gulf of Riga and in six samples of recent bottom sediments collected in a cross-section extending from the Daugava River estuary to the Gotland Basin. C15 to C17 n-alkanes were dominant in the plankton, the highest content being that of n-C16 alkanes. Low values of the index of predominance of odd hydrocarbons over even ones (0.95 to 1.16) and presence of phytane and of a chromatogram "hump" caused by compounds that cannot be separated by gas-liquid chromatography indicate partial contamination of the plankton with petroleum hydrocarbons. In the low-temperature part of the spectrum, the main n-alkane peak in the upper layer of bottom sediments is due to n-C17 compounds, whereas in the high-temperature part the main peak is due to a series of odd (C23-C31) n-alkanes. It was shown that alkanes present in these sediments have mixed biogenic origin (marine + terrigenous), with different ratios of autochtonous and allochtonous components in different parts of the investigated section, and that they are practically devoid of petroleum hydrocarbons. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_755437 |
| institution | PANGAEA |
| language | en |
| publishDate | 1981 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Alkanes in plankton and bottom sediments of the Baltic Sea Belyaeva, Alexandra N Bobyleva, Nadezhda V AK26A-2575; AK26A-2587; AK26A-2589; AK26A-2590; AK26A-2599; AK26A-2618; Akademik Kurchatov; AKU26A; Archive of Ocean Data; ARCOD; Baltic Sea; Gulf of Riga; MULT; Multiple investigations Composition of alkanes present in total plankton was determined at two stations in the Gulf of Riga and in six samples of recent bottom sediments collected in a cross-section extending from the Daugava River estuary to the Gotland Basin. C15 to C17 n-alkanes were dominant in the plankton, the highest content being that of n-C16 alkanes. Low values of the index of predominance of odd hydrocarbons over even ones (0.95 to 1.16) and presence of phytane and of a chromatogram "hump" caused by compounds that cannot be separated by gas-liquid chromatography indicate partial contamination of the plankton with petroleum hydrocarbons. In the low-temperature part of the spectrum, the main n-alkane peak in the upper layer of bottom sediments is due to n-C17 compounds, whereas in the high-temperature part the main peak is due to a series of odd (C23-C31) n-alkanes. It was shown that alkanes present in these sediments have mixed biogenic origin (marine + terrigenous), with different ratios of autochtonous and allochtonous components in different parts of the investigated section, and that they are practically devoid of petroleum hydrocarbons. |
| title | Alkanes in plankton and bottom sediments of the Baltic Sea |
| topic | AK26A-2575; AK26A-2587; AK26A-2589; AK26A-2590; AK26A-2599; AK26A-2618; Akademik Kurchatov; AKU26A; Archive of Ocean Data; ARCOD; Baltic Sea; Gulf of Riga; MULT; Multiple investigations |
| url | https://doi.org/10.1594/PANGAEA.755437 |