Compound-specific δ13C and δ2H analyses of plant and soil organic matter: A preliminary assessment of the effects of vegetation change on ecosystem hydrology

Krull, Evelyn S.; Sachse, Dirk; Mügler, Ines; Thiele, Andrej; Gleixner, Gerd

doi:10.1016/j.soilbio.2006.04.008

Cited by 92 publications

(66 citation statements)

References 44 publications

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“…We expect that lipid fractionation factors will be sensitive to influences on both the timing and carbon substrates involved in lipid synthesis, including seasonality, vegetational structure, climate conditions and plant types. For example, C 3 trees in savanna environments, which tend to be water-limited, have n-C 31 alkane e values that average À7 ± 2& (Vogts et al, 2009), while C 4 grasses in subtropical and warm temperate habitats e values average À9.3 ± 2& (Krull et al, 2006;Rommerskirchen et al, 2006). Rainforest plants including C 3 trees have values that average $À8& (Vogts et al, 2009).…”

Section: N-alkyl Lipid Biosynthetic Fractionation Patternsmentioning

confidence: 99%

Production of n-alkyl lipids in living plants and implications for the geologic past

Diefendorf

Freeman

Wing

et al. 2011

Geochimica et Cosmochimica Acta

312

223

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Section: N-alkyl Lipid Biosynthetic Fractionation Patternsmentioning

confidence: 99%

Production of n-alkyl lipids in living plants and implications for the geologic past

Diefendorf

Freeman

Wing

et al. 2011

Geochimica et Cosmochimica Acta

312

223

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“…We use modeled precipitation isotope ratio surfaces to investigate systematic patterns in the published studies of modern plant leaf wax D/H which often lack data for the isotopic composition of soil moisture. Sachse et al 3 We caution that the source of water taken up by the plant (D w ) is not always identical to local mean annual precipitation (D MAP ), especially in mountainous, arid or monsoonal climates (Brooks et al 2010, Feakins & Sessions 2010, Hu et al 2010, Krull et al 2006. We note that in situ measurements of plant water are invaluable to fully understand plant isotope systematics.…”

mentioning

confidence: 93%

Molecular Paleohydrology: Interpreting the Hydrogen-Isotopic Composition of Lipid Biomarkers from Photosynthesizing Organisms

Sachse

Billault

Bowen

et al. 2012

Annu. Rev. Earth Planet. Sci.

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864

886

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“…-changes in vegetation composition inferred from extractable and/or ester-bound lipids of plant origin and/or their carbon isotopic composition (e.g., Huang et al, 1996;Zech et al, 2009a;Le Milbeau et al, 2013); -changes in climate, i.e., mean annual temperature and/or precipitation inferred from bacterial membrane lipids and/or the hydrogen isotopic composition of plantderived lipids (e.g., Weijers et al, 2006;Krull et al, 2006;Rao et al, 2009);…”

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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Compound-specific δ13C and δ2H analyses of plant and soil organic matter: A preliminary assessment of the effects of vegetation change on ecosystem hydrology

Cited by 92 publications

References 44 publications

Production of n-alkyl lipids in living plants and implications for the geologic past

Production of n-alkyl lipids in living plants and implications for the geologic past

Molecular Paleohydrology: Interpreting the Hydrogen-Isotopic Composition of Lipid Biomarkers from Photosynthesizing Organisms

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

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