Abstract
Comparing the organic matter (OM) composition of modern and past lake sediments contributes to the understanding of changes in lacustrine environments over time. We investigate modern plant and lake-water samples as well as modern and ancient sediment samples from the Tswaing Crater in South Africa using biomarker and stable carbon isotope analyses on bulk OM and specific biomarker compounds. The characteristic molecular markers for higher land plants (predominantly C3-type deciduous angiosperms) in Lake Tswaing are long-chain n-alkanes (n-C27−33), n-alkanols (n-C28+30), stigmasterol, β-sitosterol, β-amyrin, α-amyrin and lupeol. The C17 n-alkane, tetrahymanol, gammaceran-3-one and C29 sterols dominate the lipid fraction of autochthonously produced OM. By comparing stable carbon isotope analyses on bulk OM and the characteristic biomarkers, we follow the modern carbon cycle in the crater environment and find indications for methanotrophic activity in the lake from isotopically depleted moretene. A comparative study of core sediments reveals changes in the terrestrial (C3 versus C4) and aquatic bioproductivity and allows insights into the variability of the carbon cycle under the influence of changing climatic conditions for the time from the end of the last glacial (Termination I) to the late Holocene, ca. 14,000–2,000 calibrated years before present (years BP). The most pronounced changes occur in the aquatic realm after ca. 10,000 years BP when our results imply climate swings from more humid to more arid and after 7,500 years BP to gradually more humid conditions again, which can be related to a shift in the position of the Inter-Tropical Convergence Zone or to changes in the tropical atmosphere–ocean interaction. Long-chain alkenones (LCAs) have been identified in ancient lake sediments from Africa for the first time. They occur in samples older than 7,500 years BP and their distribution (dominance of C38 and of tri- over tetra-unsaturated LCAs) is distinctly different from other published records suggesting a to date unknown source organism.
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References
Ashton PJ (1999) Limnology of the Pretoria Saltpan crater lake. In: Partridge TC (ed) Tswaing, investigations into the origin, age and palaeoenvironments of the Pretoria Saltpan. Council of Geoscience (Geological Survey of South Africa), Pretoria, pp 72–90
Bligh EG, Dyer WJ (1959) A rapid method for total lipid extraction and purification. Can J Biochem Physiol 37:911–917
Blumenberg M, Seifert R, Kasten S, Bahlmann E, Michaelis W (2009) Euphotic zone bacterioplankton sources major sedimentary bacteriohopanepolyols in the Holocene Black Sea. Geochim Cosmochim Acta 73:750–766
Boon JP, Hines H, Burlingame AL, Klok J, Rijpstra WIC, De Leeuw JW, Edmunds KE, Eglinton G (1983) Organic geochemical studies of solar lake laminated cyanobacterial mats. In: Bjøroy M, Albrecht P, Cornford C, Groot KD, Eglinton G, Galimov E, Leythaeuser D, Pelet R, Rullkötter J, Speers G (eds) Advances in organic geochemistry 1981. Wiley, Chichester, pp 207–227
Bühmann D, Elsenbroek JH (1999) Mineralogy and geochemistry of the Pretoria Saltpan borehole core. In: Partridge TC (ed) Tswaing, investigations into the origin, age and palaeoenvironments of the Pretoria Saltpan. Council of Geoscience (Geological Survey of South Africa), Pretoria, pp 91–117
Castañeda IS, Werne JP, Johnson TC (2007) Wet and arid phases in the southeast African tropics since the last glacial maximum. Geology 35:823–826
Collister JW, Rieley G, Stern B, Eglinton G, Fry B (1994) Compound-specific δ13C analyses of leaf lipids from plants with differing carbon dioxide metabolisms. Org Geochem 21:619–627
Cruz FW Jr, Burns SJ, Karmann I, Sharp WD, Vuille M, Cardoso AO, Ferrari JA, Silva Dias PL, Viana O Jr (2005) Insolation-driven changes in atmospheric circulation over the past 116,000 years in subtropical Brazil. Nature 434:63–66
de Mesmay R (2008) Fonctionnement biogéochimique du Lac Masoko (Tanzanie), approche par les biomarqueurs lipidiques sédimentaires. PhD thesis, Université de la Méditerranée, p 122
Eglinton G, Hamilton JE (1963) The distribution of alkanes. In: Swaine T (ed) Chemical plant taxonomy. Academic Press, New York, pp 187–217
EPICA Community Members (2006) One-to-one coupling of glacial climate variability in Greenland and Antarctica. Nature 444:195–198
Ficken KJ, Street-Perrott FA, Perrott RA, Swain DL, Olago DO, Eglinton G (1998) Glacial/interglacial variations in carbon cycling revealed by molecular and isotope stratigraphy of Lake Nkunga, Mt. Kenya, East Africa. Org Geochem 29:1701
Ficken KJ, Wooller MJ, Swain DL, Street-Perrott FA, Eglinton G (2002) Reconstruction of a subalpine grass-dominated ecosystem, Lake Rutundu, Mount Kenya: a novel multi-proxy approach. Palaeogeogr Palaeoclimatol Palaeoecol 177:137–149
Fleitmann D, Burns SJ, Mudelsee M, Neff U, Kramers J, Mangini A, Matter A (2003) Holocene forcing of the Indian monsoon recorded in a stalagmite from southern Oman. Science 300:1737–1739
Garcin Y, Vincens A, Williamson D, Buchet G, Guiot J (2007) Abrupt resumption of the African monsoon at the younger Dryas-Holocene climatic transition. Quat Sci Rev 26:690–704
Gasse F (2000) Hydrological changes in the African tropics since the last glacial maximum. Quat Sci Rev 19:189–211
Grimalt JO, Yruela I, Saiz-Jimenez C, Toja J, de Leeuw JW, Albaiges J (1991) Sedimentary lipid biogeochemistry of an hypereutrophic alkaline lagoon. Geochim Cosmochim Acta 55:2555–2577
Grossi V, Baas M, Schogt N, Klein Breteler WCM, de Leeuw JW, Rontani JF (1996) Formation of phytadienes in the water column: myth or reality? Org Geochem 24:833–839
Grossi V, Hirschler A, Raphel D, Rontani JF, de Leeuw JW, Bertrand JC (1998) Biotransformation pathways of phytol in recent anoxic sediments. Org Geochem 29:845–861
Harvey HR, McManus GB (1991) Marine ciliates as a widespread source of tetrahymanol and hopan-3β-ol in sediments. Geochim Cosmochim Acta 55:3387–3390
Holmgren K, Lee-Thorp JA, Cooper GRJ, Lundblad K, Partridge TC, Scott L, Sithaldeen R, Siep Talma A, Tyson PD (2003) Persistent millennial-scale climatic variability over the past 25,000 years in southern Africa. Quat Sci Rev 22:2311–2326
Hornibrook ERC, Longstaffe FJ, Fyfe WS, Bloom Y (2000) Carbon-isotope ratios and carbon, nitrogen and sulfur abundances in flora and soil organic matter from a temperate-zone bog and marsh. Geochem J 34:237–245
Kleemann G, Poralla K, Englert G, Kjosen H, Liaaen-Jensen S, Neunlist S, Rohmer M (1990) Tetrahymanol from the phototrophic bacterium Rhodopseudomonas palustris: first report of a gammacerane triterpene from a prokaryote. J Gen Microbiol 136:2551–2553
Kristen I, Fuhrmann A, Thorpe J, Röhl U, Wilkes H, Oberhänsli H (2007) Hydrological changes in southern Africa over the last 200 ka as recorded in lake sediments from the Tswaing impact crater. S Afr J Geol 110:311–326
Larimer FW, Chain P, Hauser L, Lamerdin J, Malfatti S, Do L, Land ML, Pelletier DA, Beatty JT, Lang AS, Tabita FR, Gibson JL, Hanson TE, Bobst C, Torres JLT, Peres C, Harrison FH, Gibson J, Harwood CS (2003) Complete genome sequence of the metabolically versatile photosynthetic bacterium Rhodopseudomonas palustris. Nat Biotechnol 22:55–61
Leng MJ, Lamb AL, Heaton THE, Marshall JD, Wolfe BB, Jones MD, Holmes J, Arrowsmith C (2005) Isotopes in lake sediments. In: Leng MJ (ed) Isotopes in palaeoenvironmental research. Springer, Dordrecht, pp 147–184
Levi C, Labeyrie L, Bassinot F, Guichard F, Cortijo E, Waelbroeck C, Caillon N, Duprat J, de Garidel-Thoron T, Elderfield H (2007) Low-latitude hydrological cycle and rapid climate changes during the last deglaciation. Geochem Geophys Geosys 8(5):1–11. doi:10.1029/2006GC001514
Li J, Philp RP, Pu F, Allen J (1996) Long-chain alkenones in Qinghai Lake sediments. Geochim Cosmochim Acta 60:235–241
McCarthy RD, Duthie AP (1962) Rapid quantitative method for separation of free fatty acids from other lipids. J Lipid Res 3:117–119
McCormac FG, Hogg AG, Blackwell PG, Buck CE, Higham TFG, Reimer PJ (2004) SHCal04 southern hemisphere calibration 0–11.0 cal k years BP. Radiocarbon 46:1087–1092
O’Connor PW, Thomas DSG (1999) The timing and environmental significance of late quaternary linear dune development in western Zambia. Quat Res 52:44–55
O’Leary MH (1981) Carbon isotope fractionation in plants. Phytochemistry 20:553–567
Partridge TC (1999) Tswaing, investigations into the origin, age and palaeoenvironments of the Pretoria Saltpan. Council for Geosciences, Geological Survey of South Africa, Pretoria, p 198
Partridge TC, deMenocal PB, Lorentz SA, Paiker MJ, Vogel JC (1997) Orbital forcing of climate over South Africa: a 200,000-year rainfall record from the Pretoria Saltpan. Quat Sci Rev 16:1125–1133
Pearson EJ, Farrimond P, Juggins S (2007) Lipid geochemistry of lake sediments from semi-arid Spain: relationships with source inputs and environmental factors. Org Geochem 38:1169–1195
Radke M, Sittard HG, Welte DH (1978) Removal of soluble organic matter from rock samples with a flow-through extraction cell. Anal Chem 50:663–665
Radke M, Wilsch H, Welte DH (1980) Preparative hydrocarbon group type determination by automated medium pressure liquid chromatography. Anal Chem 52:406–411
Reimer PJ, Baillie MGL, Bard E, Bayliss A, Beck JW, Bertrand C, Blackwell PG, Buck CE, Burr G, Cutler KB, Damon PE, Edwards RL, Fairbanks RG, Friedrich M, Guilderson TP, Hughen KA, Kromer B, McCormac FG, Manning S, Bronk Ramsey C, Reimer RW, Remmele S, Southon JR, Stuiver M, Talamo S, Taylor FW, van der Plicht J, Weyhenmeyer CE (2004) INTCAL04 terrestrial radiocarbon age calibration, 0–26 cal k years BP. Radiocarbon 46:1029–1058
Rontani J-F, Volkman JK (2003) Phytol degradation products as biogeochemical tracers in aquatic environments. Org Geochem 34:1–35
Rontani J-F, Volkman JK (2005) Lipid characterization of coastal hypersaline cyanobacterial mats from the Camargue (France). Org Geochem 36:251–272
Rosenfeld WD, Silverman SR (1959) Carbon isotope fractionation in bacterial production of methane. Science 130:1658–1659
Sakata S, Hayes JM, McTaggart AR, Evans RA, Leckrone KJ, Togasaki RK (1997) Carbon isotopic fractionation associated with lipid biosynthesis by a cyanobacterium: relevance for interpretation of biomarker records. Geochim Cosmochim Acta 61:5379–5389
Schouten S, Hartgers WA, Lopez JF, Grimalt JO, Sinninghe Damsté JS (2001) A molecular isotopic study of 13C-enriched organic matter in evaporitic deposits: recognition of CO2-limited ecosystems. Org Geochem 32:277–286
Scott L (1999) Palynological analysis of the Pretoria Saltpan (Tswaing crater) sediments and vegetation history in the bushveld savanna biome, South Africa. In: Partridge TC (ed) Tswaing, investigations into the origin, age and palaeoenvironments of the Pretoria Saltpan. Council of Geoscience (Geological Survey of South Africa), Pretoria, pp 143–166
Scott L (2002) Grassland development under glacial and interglacial conditions in southern Africa: review of pollen, phytolith and isotope evidence. Palaeogeogr Palaeoclimatol Palaeoecol 177:47–57
Scott L, Holmgren K (2003) Age interpretation of the Wonderkrater spring sediments and vegetation change in the savanna biome, Limpopo province, South Africa. S Afr J Sci 99:484–488
Street-Perrott FA, Ficken KJ, Yongsong H, Eglinton G (2004) Late quaternary changes in carbon cycling on Mt. Kenya, East Africa: an overview of the δ13C record in lacustrine organic matter. Quat Sci Rev 23:861–879
Sun Q, Chu G, Liu G, Li S, Wang X (2007) Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chysotila lamellosa (Haptophyceae). Org Geochem 38:1226–1234
Talbot MR, Lærdal T (2000) The late Pleistocene-Holocene palaeolimnology of Lake Victoria, East Africa, based upon elemental and isotopic analyses of sedimentary organic matter. J Paleolimnol 23:141–164
Thiel V, Jenisch A, Landmann G, Reimer A, Michaelis W (1997) Unusual distributions of long-chain alkenones and tetrahymanol from the highly alkaline lake Van, Turkey. Geochim Cosmochim Acta 61:2053–2064
Tissot BP, Welte DH (1984) Petroleum formation and occurrence. Springer, Berlin
Tornabene TG, Langworthy TA, Holzer G, Oró J (1979) Squalenes, phytanes and other isoprenoids as major neutral lipids of methanogenic and thermoacidophilic “archaebacteria”. J Mol Evol 13:73–83
Uemura H, Ishiwatari R (1995) Identification of unusual 17[beta](H)-moret-22(29)-ene in lake sediments. Org Geochem 23:675–680
Volkman JK (2005) Sterols and other triterpenoids: source specificity and evolution of biosynthetic pathways. Org Geochem 36:139–159
Wang X-C, Chen RF, Berry A (2003) Sources and preservation of organic matter in Plum Island salt marsh sediments (MA, USA): long-chain n-alkanes and stable carbon isotope compositions. Estuar Coast Shelf Sci 58:917–928
Whiticar MJ, Faber E, Schoell M (1986) Biogenic methane formation in marine and freshwater environments: CO2 reduction vs. acetate fermentation—isotope evidence. Geochim Cosmochim Acta 50:693–709
Wooller MJ, Swain DL, Ficken KJ, Agnew ADQ, Street-Perrott FA, Eglinton G (2003) Late quaternary vegetation changes around Lake Rutundu, Mount Kenya, East Africa: evidence from grass cuticles, pollen and stable carbon isotopes. J Quat Sci 18:3–15
Wooller MJ, Zazula GD, Edwards M, Froese DG, Boone RD, Parker C, Bennett B (2007) Stable carbon isotope compositions of eastern Beringian grasses and sedges: investigating their potential as paleoenvironmental indicators. Arct Antarct Alp Res 39:318–331
Zink K-G, Leythaeuser D, Melkonian M, Schwark L (2001) Temperature dependency of long-chain alkenone distributions in recent to fossil limnic sediments and in lake waters. Geochim Cosmochim Acta 65:253–265
Acknowledgments
We acknowledge the GFZ for funding this work and for the financial support for the coring campaign in 2001/2002. We especially thank Susanne Fietz for investigating pigments in the cyanobacterial samples and Kai Mangelsdorf, Philippe Schaeffer, and Yannick Garcin for fruitful discussions. Carsten Löser is thanked for his help in botanical issues. We are grateful to Anke Sobotta, Cornelia Karger, Kristin Günther, Jenny Wunger und Michael Gabriel for technical help in the laboratories.
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Kristen, I., Wilkes, H., Vieth, A. et al. Biomarker and stable carbon isotope analyses of sedimentary organic matter from Lake Tswaing: evidence for deglacial wetness and early Holocene drought from South Africa. J Paleolimnol 44, 143–160 (2010). https://doi.org/10.1007/s10933-009-9393-9
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DOI: https://doi.org/10.1007/s10933-009-9393-9