A photoautotrophic source for lycopane in marine water columns
Suspended particulate matter and recent sediments from diverse oceanic sites have been investigated for their contents of lycopane. Lycopane was present in all samples, including both oxic and anoxic water column and sediments. The highest concentrations in the water column were found in surface w...
| Veröffentlicht in: | Geochimica et cosmochimica acta. - 1984. - 57(1993), 1 vom: 28. Jan., Seite 159-65 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
1993
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| Zugriff auf das übergeordnete Werk: | Geochimica et cosmochimica acta |
| Schlagworte: | Journal Article Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. NASA Discipline Exobiology NASA Discipline Number 52-30 NASA Program Exobiology Non-NASA Center Biomarkers Carbon Isotopes Terpenes mehr... |
| Zusammenfassung: | Suspended particulate matter and recent sediments from diverse oceanic sites have been investigated for their contents of lycopane. Lycopane was present in all samples, including both oxic and anoxic water column and sediments. The highest concentrations in the water column were found in surface waters of the central Pacific gyre (1.5 ng/L) and in the anoxic waters of the Cariaco Trench (1.1 ng/L) and the Black Sea (0.3 ng/L). Vertical concentration profiles suggest that lycopane is probably algal in origin. Moreover, biogeochemical conditions in anoxic zones apparently result in a secondary production of lycopane from an as yet unidentified precursor. Compound-specific carbon isotopic analyses have been carried out on lycopane from water column and sediment samples. Isotopic compositions of lycopane range between -23.6% and -32.9% and are consistent with a photoautotrophic origin. We postulate that some lycopane is produced in surface waters of the ocean, while additional lycopane is produced in anoxic zones by anaerobic microbial action on an algal precursor |
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| Beschreibung: | Date Completed 30.03.1995 Date Revised 05.11.2019 published: Print Citation Status MEDLINE |
| ISSN: | 0016-7037 |