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Science 6 July 2001:
Vol. 293. no. 5527, pp. 92 - 95
DOI: 10.1126/science.1058424
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Massive Expansion of Marine Archaea During a Mid-Cretaceous Oceanic Anoxic Event
Marcel M. M. Kuypers, Peter Blokker, Jochen Erbacher, Hanno Kinkel, Richard D. Pancost, Stefan Schouten, and Jaap S. Sinninghe Damsté
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Supplementary Material
| Supplemental Table 1. Source organisms, inferred biochemical precursor, isotopic composition and mode of occurrence of C skeletons encountered in the sediment. Carbon skeletons are shown in Fig. 1. Carbon skeletons occur in the following modes: free hydrocarbons (free), macromolecularly S-bound moiety (S-bd), alcohols (Alc.) and ether-bound moiety (E-bd). The range of measured stable carbon isotopic values for individual components is indicated. Abbreviations are isopr., isoprenoid alkanes; 1cycl., mono cyclic; Funct., functionalised; unsat., unsaturated; Heterotr., heterotrophic bacteria; cyanobact., cyanobacteria. |
| Source organism | Biochemical
Precursor | C skeleton | Mode |  13C
(‰) |
| Higher plants | n-C27 | n-C27 | Free | -27.7 to -28.9 |
| n-C31 | n-C31 | Free | -27.7 to -28.0 |
| Algae/higher plants | 24-ethyl-cholesterols | C29 sterane (VIII) | Alc. | -25.1 to -30.2 |
| Algae | 24-methyl-cholesterols | C28 sterane | Alc. | -27.0 to -29.2 |
| Algae/zooplankton | Sterols | C27 sterane (VII) | Alc. | -23.9 to -28.5 |
| Algae/cyanobact. | Chlorophyll | Phytane (IX) | Alc. | -27.2 to -29.5 |
| Heterotr./cyanobact. | Bacteriohopanepolyols | C29hopane | Free | -23.7 to -24.9 |
| Bacteriohopanepolyols | C31hopane | Free | -26.1 to -27.0 |
| Archaea/bacteria | Squalane/squalene | Squalane | Free | -17.6 to -23.4 |
| Archaea | GDGTs (III, IV) | C40: 1 cycl.(b) | E-bd/alc. | -17.6 to -20.0 |
| GDGTs (V) | C40: 2 cycl.(c) | E-bd/alc. | -17.1 to -18.4 |
| GDGTs (VI) | C40: 3 cycl.(d) | E-bd/alc. | -17.3 to -18.3 |
| Archaeol | Phytane (IX) | E-bd. | -17.7 |
| PMI (II)/unsat. PMI | PMI (II) | Free | -16.5 to -21.2 |
| Unknown | TMI (I) | Free | -16.2 to -16.7 |
| Funct. TMI/PMI | TMI/PMI | E-bd | -13.1 to -15.0 |
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