Vascular plant biomarkers as proxies for palaeoflora and palaeoclimatic changes at the Dogger/Malm transition of the Paris Basin (France)

Hautevelle, Yann; Michels, Raymond; Malartre, Fabrice; Trouiller, Alain

doi:10.1016/j.orggeochem.2005.12.010

Cited by 152 publications

(57 citation statements)

References 48 publications

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“…The types of molecular proxies used are as diverse as the field of soil science itself. They range from the use of phospholipid fatty acids to estimate bacterial and fungal biomass in soils (Frostegard and Bååth, 1996) to the application of preserved retene / caldalene ratios to infer paleoecological vegetation shifts (Hautevelle et al, 2006). Also, the archives of the molecular proxies in soil sciences that are used are diverse and, in addition to soils themselves, include lacustrine and terrestrial sediments, peat deposits, and paleosols (Zhang et al, 2006;Bai et al, 2009;Andersson et al, 2011;Berke et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Opportunities and limitations related to the application of plant-derived lipid molecular proxies in soil science

Jansen

Wiesenberg

2017

SOIL

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Abstract. The application of lipids in soils as molecular proxies, also often referred to as biomarkers, has dramatically increased in the last decades. Applications range from inferring changes in past vegetation composition, climate, and/or human presence to unraveling the input and turnover of soil organic matter (SOM). The molecules used are extractable and non-extractable lipids, including ester-bound lipids. In addition, the carbon or hydrogen isotopic composition of such molecules is used. While holding great promise, the application of soil lipids as molecular proxies comes with several constraining factors, the most important of which are (i) variability in the molecular composition of plant-derived organic matter both internally and between individual plants, (ii) variability in (the relative contribution of) input pathways into the soil, and (iii) the transformation and/or (selective) degradation of (some of) the molecules once present in the soil. Unfortunately, the information about such constraining factors and their impact on the applicability of molecular proxies is fragmented and scattered. The purpose of this study is to provide a critical review of the current state of knowledge with respect to the applicability of molecular proxies in soil science, specifically focusing on the factors constraining such applicability. Variability in genetic, ontogenetic, and environmental factors influences plant n-alkane patterns in such a way that no unique compounds or specific molecular proxies pointing to, for example, plant community differences or environmental influences, exist. Other components, such as n-alcohols, n-fatty acids, and cutin-and suberin-derived monomers, have received far less attention in this respect. Furthermore, there is a high diversity of input pathways offering both opportunities and limitations for the use of molecular proxies at the same time. New modeling approaches might offer a possibility to unravel such mixed input signals. Finally, the transformation and turnover of SOM offer opportunities when tracing such processes is the purpose of applying a molecular proxy while imposing limitations when they obliterate the molecular proxy signals linked to other phenomena. For n-alkanes several modeling approaches have recently been developed to compensate for (selective) degradation. Still, such techniques are in their infancy and information about their applicability to classes of components other than n-alkanes is lacking. All constraining factors considered can have a significant influence on the applicability of molecular proxies in soil science. The degree of influence strongly depends on the type of molecular proxy and the environmental context in which it is applied. However, the potential impact of the constraining factors should always explicitly be addressed whenever molecular proxies are applied in a soil scientific context. More importantly, there is still a serious lack of available information, in particular for compound classes other than the n-alkanes. Therefore, we...

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Section: Introductionmentioning

confidence: 99%

Opportunities and limitations related to the application of plant-derived lipid molecular proxies in soil science

Jansen

Wiesenberg

2017

SOIL

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“…Vliex et al, 1994;van Aarssen et al, 2000;Hautevelle et al, 2006a). Indeed, (1) plant biomarkers are more widespread in the stratigraphic record than well-preserved plant macrofossils; (2) on the contrary to Palaeozoic and Mesozoic palynomorphs, they can be directly linked to specific taxa of plants, and (3) biomarkers could be readily analysed by usual organic geochemistry procedures on total rock samples.…”

Section: Introductionmentioning

confidence: 99%

Determination of the molecular signature of fossil conifers by experimental palaeochemotaxonomy – Part 1: The Araucariaceae family

Hautevelle

Michels

2013

Biogeosciences

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Twelve species of the conifer family Araucariaceae, including Araucaria (6 species), Agathis (3 species) and Wollemia (1 species) genera, were submitted to artificial maturation by confined pyrolysis. The aim of these experiments is to transform the biomolecules synthesized by these species into their homologous geomolecules in laboratory conditions. Determination of the diagenetic molecular signatures of Araucariaceae through experimentation on extant representatives allows us to complete our knowledge in botanical palaeochemotaxonomy. Such knowledge is relevant to palaeoenvironmental, environmental and archaeology purposes. All artificially diagenetic species of Araucariaceae are firstly characterized by a predominance of saturated tetracyclic diterpenoids including ent-beyerane, phyllocladanes and ent-kauranes. Moreover, Araucaria genus shows a high relative abundance of bicyclic sesquiterpenoids, particularly the cadalane-type compounds accompanied by those of eudesmane and bisabolane types as well as chamazulene and pentamethyl-dihydroindenes. Diterpenoids are of labdane, isopimarane and abietane types (essentially derived from abietanoic acids) as well as isohexyl alkylaromatic hydrocarbons. Compared to the tetracyclic diterpenoids, these compounds show a relatively lower abundance, reaching trace levels in the case of saturated abietanes. Distributions of sesquiterpenoids and diterpenoids of Agathis show some similarities to that of Araucaria, with the exception of one species, in which the tetracyclic compounds are absent and the abietane type (essentially derived from abietanoic acids) predominant. High similarities between the Wollemia and Araucaria genera are observed. Both are characterized by some high relative abundance of tetracyclic compounds with no predominance of other specific diterpenoids

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“…Furthermore, higher plant biomarkers norsimonellite and simonellite were also detected in all sediment samples. Simonellite is an intermediate aromatic abietane from partial degradation of dehydroabietic acid (Hautevelle et al, 2006) or diagenetic products of abietic acid, an abundant diterpenoid in conifer plants (Simoneit et al, 1986;Schouten et al, 2007). Long-chain alkyl benzenes High abundances of longchain alkylbenzens (aBs) were detected in the saturate fractions of the SK-1 sedimentary rocks (Fig.…”

Section: Distribution Comparison Of Long-chain Ans and Selected Biomamentioning

confidence: 99%

Occurrence and distribution of series long-chain alkyl naphthalenes in Late Cretaceous sedimentary rocks of the Songliao Basin, China

et al. 2011

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A pair of series straight long-chain 2-and 1-alkyl naphthalenes (aNs) with alkyl chain carbon number up to 30 was detected in late Cretaceous sedimentary source rocks of the onshore Songliao Basin, NE China. Their sedimentary profile was shown to correlate positively with the relative abundances of several higher plant biomarkers including iP-iHMN and phenanthrene and weakly inversely with the relative abundance of alkylbenzenes. In contrast, the aNs distribution shows no relationship with hydrocarbon maturity indicators. The TOC, δ 13 C profile and other molecular features (e.g., CPI, OEP, Pr/Ph, Ga/C 31 H) were consistent with transgressive/regressive water cycles of the palaeo-lake of Songliao Basin. Decreasing Pr/Ph values in the upper horizon indicative of increasingly anoxic conditions. The distinctive occurrence and distribution of the long-chain aN compounds on the profile of the SK-1 borehole may imply some unique source inputs under particular lacustrine environmental conditions.

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Vascular plant biomarkers as proxies for palaeoflora and palaeoclimatic changes at the Dogger/Malm transition of the Paris Basin (France)

Cited by 152 publications

References 48 publications

Opportunities and limitations related to the application of plant-derived lipid molecular proxies in soil science

Opportunities and limitations related to the application of plant-derived lipid molecular proxies in soil science

Determination of the molecular signature of fossil conifers by experimental palaeochemotaxonomy – Part 1: The Araucariaceae family

Occurrence and distribution of series long-chain alkyl naphthalenes in Late Cretaceous sedimentary rocks of the Songliao Basin, China

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