Biomarkers as proxies for plant inputs to peats: an example from a sub-boreal ombrotrophic bog

Pancost, Richard D.; Baas, Marianne; Geel, B. van; Damsté, Jaap S Sinninghe

doi:10.1016/s0146-6380(02)00048-7

Cited by 274 publications

(213 citation statements)

References 27 publications

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“…Mosses exhibited a greater predominance of higher molecular weight n-alkanes, mainly C 31 (3 samples) and C 29 (Table 2), with the exception of the species of Sphagnum, which maximized at C 23 , coinciding with the results of previous studies (Baas et al, 2000;Nott et al, 2000;Pancost et al, 2002;Nichols et al, 2006;Ortiz et al, 2011;Bush and Mclnerney, 2013). These findings thus show that the predominant n-alkane in most of Sphagnum moss species is C 23 , while in other plants long chain n-alkanes are the most abundant.…”

Section: Lípid Biomarkers In Living Plantssupporting

confidence: 86%

“…AIso, in some Sphagnum species (e.g. S. capíllífolíum, S. magellanícum, S. cuspídatum), there was a bimodal distribution, with a second maximum at C 31 (Baas et al, 2000;Nott et al, 2000;Pancost et al, 2002). Given that the n-alkane profiles of Sphagnum (maximizing at C 23 ) and other plants (predominance of C 31 ) differ, the predominant n-alkane chain distribution in Las Conchas record (Fig.…”

Section: Paleoenvíronmental Reconstructíonmentioning

confidence: 97%

“…The values ofvarious indices, namely the predominant n-alkane chain, average chain length (ACL), aquatic macrophytes proxy (Paq), C 23 /C 29 ratio and modeled C 23 /C 29 ratio (Pancost et al, 2002) are shown in Fig. 5.…”

Section: N-alkanesmentioning

confidence: 99%

“…The n-alkane content and distribution have been used to discriminate between Sphagnum (moss) vs. Erica (heather) input and in turn to reconstruct paleoenvironmental conditions linked to humid or drier climatic phases (Nott et al, 2000;Pancost et al, 2002;McClymont et al, 2005;Nichols et al, 2006;Ortiz et al, 2010). n-Alkan-2-ones also occur in peat (Morrison and Bick, 1967;Lehtonen and Ketola, 1990;Xie et al, 2004;Nichols and Huang, 2007;Zheng et al, 2007;Ortiz et al, 2010;López-Días et al, 2013b).…”

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confidence: 99%

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Biomarkers and inorganic proxies in the paleoenvironmental reconstruction of mires: The importance of landscape in Las Conchas (Asturias, Northern Spain)

Ortíz

Borrego

Gallego

et al. 2016

Organic Geochemistry

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A B S T R A C TWe determined the lipid distributions (n-alkanes, n-alkan-2-ones, n-alkanoic acids), total organic carbon (TOC), total nitrogen (TN), CajMg and ash content in Las Conchas mire, a 3.2 m deep bryophytedominated mire in Northern Spain covering 8000 cal yr BP. Bog conditions developed in the bottom 20 cm of the profile, and good preservation of organic matter (OM) was inferred from n-alkanoic acid distribution, with the exception of the uppermost 20 cm (last ca. 200 yr). Microbial synthesis of long chain saturated fatty acids from primary OM likely produced a dominance of short chain n-alkanoic acids with a bimodal distribution, as well as the lack of correspondence between the n-alkane and n-alkanoic acid profiles in the upper 20 cm. This was accompanied by an increase in ash content, a decrease in TOC and variation in n-alkane ratio s, thereby suggesting significant changes in the mire, namely drainage and transformation to a meadow, in the last ca. 200 yr. The distribution of n-alkan-2-ones indicated an increase in bacterial source from the bottom of the record to 94 cm, whereas their distribution in the upper part could be attributed mainly to plant input andjor the microbial oxidation of n-alkanes. The different n-alkane proxies showed variations, which we interpreted in terms of changes in vegetation (Sphagnum vs. non-Sphagnum dominated phases) during the last 8000 cal yr BP. C 23 was the most abundant homolog throughout most ofthe record, thereby suggesting dominant humid conditions alternating with short drier phases. However, such humid conditions were not linked to paleoclimatic variation but rather to geomorphological characteristics: Las Conchas mire, at the base of the Cuera Range, receives continuous runoff-even during drier periods-which is not necessarily accompanied by additional mineral input to peat, producing the development of Sphagnum moss typical of waterlogged ecotopes and damp habitats. Thus, although geochemical proxies indicated an ombrotrophic regime in the mire, geomorphological characteristics may make a considerable contribution to environmental conditions.

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Section: Lípid Biomarkers In Living Plantssupporting

confidence: 86%

Section: Paleoenvíronmental Reconstructíonmentioning

confidence: 97%

Section: N-alkanesmentioning

confidence: 99%

mentioning

confidence: 99%

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Biomarkers and inorganic proxies in the paleoenvironmental reconstruction of mires: The importance of landscape in Las Conchas (Asturias, Northern Spain)

Ortíz

Borrego

Gallego

et al. 2016

Organic Geochemistry

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“…While such an application in itself is not new (e.g. Pancost et al, 2002;Hughen et al, 2004) the novelty of our approach lies in the application of the VERHIB model that we specifically developed to unravel the mixed n-alkane signal encountered in soil or sedimentary archives (Jansen et al, 2010). The VERHIB model consists of a linear regression model that describes how a certain input of plant-derived compounds such as n-alkanes over time in a certain archive at a certain location, results in accumulation of these compounds.…”

Section: Biomarker Analysis 241 the Application Of The Verhib Modelmentioning

confidence: 99%

The added value of biomarker analysis to the genesis of plaggic Anthrosols; the identification of stable fillings used for the production of plaggic manure

Mourik

Wagner

Boer

et al. 2016

SOIL

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Abstract. Plaggic Anthrosols are the result of historical forms of land management in cultural landscapes on chemically poor sandy substrates. Application of plaggic manure was responsible for the development of the plaggic horizons of these agricultural soils. Pollen diagrams reflect aspects of the environmental development but the interpretation of the pollen spectra is complicated due to the mix of the aeolian pollen influx of crop species and species in the surroundings, and of pollen occurring in the used stable fillings. Pollen diagrams and radiocarbon dates of plaggic Anthrosols suggested a development period of more than a millennium. Calluna is present in almost all the pollen spectra, indicating the presence of heath in the landscape during the whole period of soil development. Optically stimulated luminescence dating of the plaggic horizon made clear that the deposition of plaggic covers started in the 16th century and accelerated in the 18th century. The stable fillings, used for the production of plaggic manure and responsible for the rise of the soil surface, cannot be identified with pollen diagrams alone. Biomarker analyses provide more evidence about the sources of stable fillings. The oldest biomarker spectra of the plaggic horizons of three typical plaggic Anthrosols examined in this study were dominated by biomarkers of forest species such as Quercus and Betula while the spectra of middle part of the plaggic horizons were dominated by biomarkers of stem tissue of crop species such as Secale and Avena. Only the youngest spectra of the plaggic horizons were dominated by biomarkers of Calluna. This indicates that the use of heath sods as stable filling was most likely introduced very late in the development of the Anthrosols. Before the 19th century the mineral component in plaggic manure cannot be explained by the use of heath sods. We conclude that other sources of materials, containing mineral grains must have been responsible for the raise of the plaggic horizon.

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Biochemical evidence for minimal vegetation change in peatlands of the West Siberian Lowland during the Medieval Climate Anomaly and Little Ice Age

2014

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Peatland vegetation is controlled primarily by the depth of the water table, making peat paleovegetation a useful climate archive. We applied a biochemical approach to quantitatively estimate the plant sources of peat carbon based on (1) neutral sugar compositions of Sphagnum, vascular plants, and lichens and (2) lignin phenol compositions of vascular plants. We used these biochemical indices to characterize vegetation change over the last 2000 years in four peat cores from the West Siberian Lowland (Russia) to investigate climate change during the Medieval Climate Anomaly and Little Ice Age. The vegetation was dominated by Sphagnum in all four cores, but was punctuated by several rapid but transient transitions to vascular plant dominance in the two cores from the southern West Siberian Lowland (<60°N latitude). Lichen contributions were evident at the end of the Medieval Climate Anomaly and during the Little Ice Age in the two cores from northern West Siberian Lowland (>60°N), possibly indicating permafrost development. However, there was no evidence for sustained vegetation change in response to either climatic event in cores from southern West Siberian Lowland. This suggests that these climatic events were relatively mild in the southern West Siberian Lowland, although the sensitivity of bog plant communities to climate change remains poorly understood.

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Biomarkers as proxies for plant inputs to peats: an example from a sub-boreal ombrotrophic bog

Cited by 274 publications

References 27 publications

Biomarkers and inorganic proxies in the paleoenvironmental reconstruction of mires: The importance of landscape in Las Conchas (Asturias, Northern Spain)

Biomarkers and inorganic proxies in the paleoenvironmental reconstruction of mires: The importance of landscape in Las Conchas (Asturias, Northern Spain)

The added value of biomarker analysis to the genesis of plaggic Anthrosols; the identification of stable fillings used for the production of plaggic manure

Biochemical evidence for minimal vegetation change in peatlands of the West Siberian Lowland during the Medieval Climate Anomaly and Little Ice Age

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