The influence of oxic degradation on the sedimentary biomarker record I: evidence from Madeira Abyssal Plain turbidites

Hoefs, Marcel J.L.; Rijpstra, W. Irene C.; Damsté, Jaap S. Sinninghe

doi:10.1016/s0016-7037(02)00864-5

Cited by 155 publications

(122 citation statements)

References 62 publications

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“…4, where open blue triangles indicate data for samples where extracts were not saponified, and open red circles indicate samples where 210 extracts were saponified), whereas these lipids also occur in various bound forms, which may comprise different distributions (cf. Hoefs et al, 2002;Shimokawara et al, 2010;Volkman et al, 1992). To test this, we selected a subset of surface sediments for which diols were analyzed both without and with prior saponification of the extract.…”

Section: Effect Of Environmental Conditions On Long Chain 114-alkyl mentioning

confidence: 99%

Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature

Rampen

Willmott

Kim

et al. 2014

Organic Geochemistry

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Long chain alkyl diols form a group of lipids occurring widely in marine environments.Recent studies have suggested several palaeoclimatological applications for proxies based on their distributions, but also revealed uncertainties about their applicability. Here we evaluate the use of long chain 1,14-alkyl diol indices for reconstruction of temperature and upwelling 25 conditions by comparing index values, obtained from a comprehensive set of marine surface sediments, with environmental factors like sea surface temperature (SST), salinity and nutrient concentrations. Previous cultivation efforts indicated a strong effect of temperature on the degree of saturation and the chain length distribution of long chain 1,14-alkyl diols in Proboscia spp., quantified in the diol saturation index (DSI) and diol chain length index 30 (DCI), respectively. However, values of these indices in surface sediments show no relationship with annual mean SST of the overlying water. It remains unknown what determines the DSI, although our data suggests that it may be affected by diagenesis, while the relationship between temperature and DCI may be different for different Proboscia species. In addition, contributions of algae other than Proboscia diatoms may affect both 35 indices, although our data provide no direct evidence for additional long chain 1,14-alkyl diol sources. Two other indices using the abundance of 1,14-diols vs. 1,13-diols and C30 1,15-diols IntroductionOver the last decades, an increasing number of lipids from marine environments has been identified and linked to their natural sources, and some of them are now being used as proxies for past climate conditions (e.g. Eglinton and Eglinton, 2008 and references therein). Long chain alkyl diols form one group with high biomarker potential; after their discovery in the 50 Black Sea (De Leeuw et al., 1981), they have been identified widespread in Quaternary sediments from low to high latitudes (Versteegh et al., 1997; 2000 and references therein).Cultured marine and freshwater eustigmatophyte algae produce series of long chain alkyl diols, consisting mainly of C28 -C32 1,13-and 1,15-diols (Volkman et al., 1999;. In the environment, a recent study on lipids and 18s rRNA genes in a freshwater lake has shown that 55 long chain alkyl diols are produced by eustigmatophytes in the surface waters of the lake (Villanueva et al., 2014). However, the role of eustigmatophytes as a source of marine long chain alkyl diols remains unclear. Reports of eustigmatophyte algae in marine environments are sparse and the long chain alkyl diol composition of marine eustigmatophytes does not match those of marine sediments (Volkman et al., 1992;Versteegh et al., 1997; Rampen et al., 60 2012). Despite uncertainties concerning their sources, recent work has indicated a strong correlation between sea surface temperatures (SST) and the fractional abundances of C28 1,13-, C30 1,13-and C30 1,15-diols in marine sediments. Based on this, a new temperature proxy, i.e. the long chain diol index...

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Section: Effect Of Environmental Conditions On Long Chain 114-alkyl mentioning

confidence: 99%

Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature

Rampen

Willmott

Kim

et al. 2014

Organic Geochemistry

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“…LCDs in algal cell material of Eustigmatophytes and in the sediment have been shown to occur in different forms, i.e. as free-extractable, extractable-bound (released by hydrolysis of the extract) and residually-bound lipids (released by hydrolysis of the residual biomass left after extraction) (Gelin et al, 1997;Ahmed et al, 2000;Grossi et al, 2001;Hoefs et al, 2002;Shimokawara et al, 2010). Additionally, they are also thought to be the building blocks of the insoluble biopolymer algaenan, which occurs in the cell wall of Eustigmatophytes (de Leeuw et al, 1981;Tegelaar et al, 1989b;Gelin et al, 1997;Volkman et al, 1998;Scholz et al, 2014;Zhang and Volkman, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Only a few studies have considered the impact of diagenesis on the abundance and distribution of LCDs (Ferreira et al, 2001;Versteegh et al, 2010;Bogus et al, 2012). As shown by various studies, biomarker distributions can be altered substantially by oxygen exposure (Sun and Wakeham, 1994;Hoefs et al, 1998;Prahl et al, 2003;Rontani et al, 2009Rontani et al, , 2013, but only Sinninghe , Hoefs et al (2002) and Rodrigo-Gámiz et al (2016) analyzed the impact of oxic degradation on LCD distributions. Sinninghe analyzed sediment cores from the northern Arabian Sea, studying the impact of oxygen exposure time on the preservation potential of various biomarkers and finding relatively high preservation efficiencies of LCDs.…”

Section: Introductionmentioning

confidence: 99%

“…Sinninghe analyzed sediment cores from the northern Arabian Sea, studying the impact of oxygen exposure time on the preservation potential of various biomarkers and finding relatively high preservation efficiencies of LCDs. Hoefs et al (2002) studied free and bound lipid biomarkers in oxidized and un-oxidized parts of Madeira Abyssal Plain turbidites, finding higher preservation of bound LCDs compared to free LCDs. Analysis of Arabian Sea surface sediments deposited under contrasting redox conditions by Rodrigo-Gámiz et al (2016) showed a strong decrease in concentration of LCDs with increasing oxygen exposure, as well as a slightly higher degradation rate of 1,15-LCDs compared to 1,14-and 1,13-LCDs.…”

Section: Introductionmentioning

confidence: 99%

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The impact of oxygen exposure on long-chain alkyl diols and the long chain diol index (LDI) – a long-term incubation study

Reiche

Rampen

Dorhout

et al. 2018

Organic Geochemistry

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a b s t r a c tIn recent years, long chain alkyl diols (LCDs) have been used increasingly to study and reconstruct past sea surface temperatures using the long chain diol index (LDI), which is based on changes in the distribution of 1,15-LCDs. However, the impact of diagenesis on LCDs and the LDI is still poorly constrained. Here we studied the impact of oxygen exposure on LCDs and the LDI, by aerobically incubating biomass of the LCD-producing alga Nannochloropsis oculata for 271 days. The concentrations of extractable freeand bound, residually ester-bound and residually-bound glycosidic ether-or amide-bound saturated fatty acids and LCDs were determined. A significant impact of oxygen exposure was observed for C 14 , C 16 and C 18 saturated fatty acids and the C 20:5 polyunsaturated fatty acid, as their concentration decreased significantly over time, irrespective of their mode of binding. LCDs, in contrast, increased significantly in concentration over incubation time, e.g. up to a 30-fold increase in concentrations for residually ester-bound LCDs at day 125 compared to concentrations at the beginning of the experiment. This increase in concentration most likely represents a release of LCDs from the insoluble biopolymer algaenan due to the impact of oxygen exposure. Values of the LDI differed strongly depending on the mode of occurrence of LCDs in the biomass. However, despite the large changes in concentration of LCDs in response to oxygen exposure, the LDI remained relatively stable after prolonged degradation. This suggests that oxygen exposure may not have a substantial impact on the LDI of extractable LCDs used for its determination.

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“…The odd-over-even predominance (OEP; Eq. 1) was calculated after Hoefs et al (2002) and is an indicator for degradation: values smaller than 5 are considered to be strongly degraded (Zech et al, 2010;Schäfer et al, 2016a) …”

Section: N-alkane Patternsmentioning

confidence: 99%

Late Quaternary climate and environmental reconstruction based on leaf wax analyses in the loess sequence of Möhlin, Switzerland

Wüthrich

Bliedtner

Schäfer

et al. 2017

E&G Quaternary Sci. J.

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Late Quaternary climate and environmental reconstruction based on leaf wax analyses in the loess sequence of Möhlin, Switzerland, E&G Quaternary Sci. J., 66, 91-100, https://doi.org/10.5194/egqsj-66-91-2017, 2017. Abstract:We present the results of leaf wax analyses (long-chain n-alkanes) from the 6.8 m deep loess sequence of Möhlin, Switzerland, spanning the last ∼ 70 kyr. Leaf waxes are well preserved and occur in sufficient amounts only down to 0.4 m and below 1.8 m depth, so no paleoenvironmental reconstructions can be done for marine isotope stage (MIS) 2.Compound-specific δ 2 H wax analyses yielded similar values for late MIS 3 compared to the uppermost samples, indicating that various effects (e.g., more negative values due to lower temperatures, more positive values due to an enriched moisture source) cancel each other out. A pronounced ∼ 30 ‰ shift towards more negative values probably reflects more humid conditions before ∼ 32 ka. Radiocarbon dating of the n-alkanes corroborates the stratigraphic integrity of leaf waxes and their potential for dating loess-paleosol sequences (LPS) back to ∼ 30 ka. Kurzfassung:Wir präsentieren die Ergebnisse von Blattwachsanalysen (langkettige n-Alkane) aus einer 6.8 m mächtigen Löss-Sequenz bei Möhlin, Schweiz, welche bis etwa 70 ka zurückreicht. Nur bis 0.4 m Tiefe und unterhalb von 1.8 m sind die Blattwachse gut und in ausreichender Menge erhalten, so dass Aussagen bezüglich der Umweltbedingungen während der marinen Isotopenstufe (MIS) 2 nicht gemacht werden können. Die Muster der n-Alkane zeigen für alle Proben einen dominanten Input von Gras-Alkanen, jedoch ist es nur anhand der n-Alkane nicht möglich,

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The influence of oxic degradation on the sedimentary biomarker record I: evidence from Madeira Abyssal Plain turbidites

Cited by 155 publications

References 62 publications

Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature

Evaluation of long chain 1,14-alkyl diols in marine sediments as indicators for upwelling and temperature

The impact of oxygen exposure on long-chain alkyl diols and the long chain diol index (LDI) – a long-term incubation study

Late Quaternary climate and environmental reconstruction based on leaf wax analyses in the loess sequence of Möhlin, Switzerland

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