Compositions of n-Alkanes and n-Methyl Ketones in Soils of the Forest-Park Zone of Moscow

Anokhina, N. A.; Демин, В. В.; Zavgorodnyaya, Yu. A.

doi:10.1134/s1064229318060030

Cited by 10 publications

(15 citation statements)

References 28 publications

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“…For the coniferous forest vegetation type, five sites were included from two studies (Hirave et al, 2020;Otto and Simpson, 2005). For the deciduous forest vegetation type, 11 sites were included from five studies (Angst et al, 2016;Anokhina et al, 2018;Hirave et al, 2020;Otto and Simpson, 2005;Wu et al, 2019). For the mixed forest type, one site was included from one study (Hirave et al, 2020).…”

Section: Results From Soil Profilesmentioning

confidence: 99%

Transformation of <i>n</i>-alkanes from plant to soil: a review

Thomas

Jansen

Loon

et al. 2021

SOIL

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Abstract. Despite the importance of soil organic matter (SOM) in the global carbon cycle, there remain many open questions regarding its formation and preservation. The study of individual organic compound classes that make up SOM, such as lipid biomarkers including n-alkanes, can provide insight into the cycling of bulk SOM. While studies of lipid biomarkers, particularly n-alkanes, have increased in number in the past few decades, only a limited number have focused on the transformation of these compounds following deposition in soil archives. We performed a systematic review to consolidate the available information on plant-derived n-alkanes and their transformation from plant to soil. Our major findings were (1) a nearly ubiquitous trend of decreased total concentration of n-alkanes either with time in litterbag experiments or with depth in open plant–soil systems and (2) preferential degradation of odd-chain length and shorter chain length n-alkanes represented by a decrease in either carbon preference index (CPI) or odd-over-even predominance (OEP) with depth, indicating degradation of the n-alkane signal or a shift in vegetation composition over time. The review also highlighted a lack of data transparency and standardization across studies of lipid biomarkers, making analysis and synthesis of published data time-consuming and difficult. We recommend that the community move towards more uniform and systematic reporting of biomarker data. Furthermore, as the number of studies examining the complete leaf–litter–soil continuum is very limited as well as unevenly distributed over geographical regions, climate zones, and soil types, future data collection should focus on underrepresented areas as well as quantifying the transformation of n-alkanes through the complete continuum from plant to soil.

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Section: Results From Soil Profilesmentioning

confidence: 99%

Transformation of <i>n</i>-alkanes from plant to soil: a review

Thomas

Jansen

Loon

et al. 2021

SOIL

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“…The results of n-alkanes composition are more reliably a record of change in vegetation at the Late Pleistocene-Holocene transition, confirming the hypothesis of the dominance of biocenoses with a higher proportion of grassy landscapes. The predominance of mid-chain alkanes in AE, EB horizons of modern arable soils is probably a result of degradation associated with microbiological activity [10].…”

Section: Discussionmentioning

confidence: 99%

“…Despite the abundance of paleogeographic studies of the Late Pleistocene loess-paleosol series on the Russian Plain [1,[4][5][6][7][8], there are currently no paleoreconstructions based on n-alkane distribution. Although similar studies have been carried out for modern soils that were interested in anthropogenic pollution [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…The predominance of even alkanes over odd can indicate the degradation of organic matter over time [14]. The authors of another publication [10] discuss that the predominance of even alkanes indicates the contribution of microbial biomass. In this case, the proportion of medium-chain alkanes (< C 25 ) also increases.…”

Section: Introductionmentioning

confidence: 99%

“…Alkanes are found in modern and fossil plant materials [42,43], in soils [9,10,21,39], lacustrine sediments [44], peat sediments and peaty soils [25,40,45], marine sediments [46,47] as well as paleosols [13,41,48] and loess-paleosol serias [15,49].…”

Section: Introductionmentioning

confidence: 99%

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n-Alkane Distribution—A Paleovegetation Change Indicator during the Period from Late Glacial to Late Holocene on Russian Plain (Bryansk Region)

2020

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Loess-paleosol series are well preserved in the south part of the Russian Plain. However, these sequences have a low number of studies on their organic matter, such as researches of isotope composition, n-alkane and other biomarkers. Thus, the purpose of the study was to reconstruct vegetation conditions from the Late Glacial to Late Holocene. We used the leaf wax-derived n-alkanes to detect vegetation evolution of the Bryansk Region. The stable carbon isotope composition of organic matter and pedogenic carbonates was carried out for the same aim. Three paleosols (of Lasko, Bølling-Allerød warmings and Holocene second humus horizons) and modern soils of different relief positions were investigated. n-Alkane distribution, as well as isotope composition indicates changes from grassy to woody vegetation during this period. The use of biomarkers such as n-alkanes helps to more clearly interpret isotopic data.

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FTIR Photoacoustic and ATR Spectroscopies of Soils with Aggregate Size Fractionation by Dry Sieving

et al. 2022

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Granulometric fractionation as a source of additional information on organic-matter and inorganic matrix components of soils using FTIR–photoacoustic spectroscopy (FTIR–PAS) supported by attenuated–total reflection FTIR spectroscopy (ATR–FTIR) for a wide range of aggregate fractions (10–5000 μm) was used to compare the sensitivity, reproducibility, information contents, and representativity of fractionated samples. For chernozem and sod-podzolic soils and different agricultural-use chernozem samples, differences in the composition were found, manifested in normalized spectra of microaggregate fractions, with the range of 10–100 μm bearing the complete information. Most changes are observed in the soil organic matter range (1900–1340 cm–1), although these changes are slight, and in the soil-matrix region (550–300 cm–1). The latter region increases the intensity of bands corresponding to amorphous silica and clay minerals in fine fractions, while the intensity of bands attributed to quartz lattice vibrations decreases. FTIR–PAS spectra do not differ considerably at high interferometer modulation frequencies as the signal-penetration depth is comparable with particle sizes. The soil fractions below 20 μm result in the maximum sensitivity, reproducibility, and signal-to-noise ratio, showing no changes from coarser fractions by the information content and, thus, providing representative samples for analysis. The fractionation shows more differences in the sod-podzolic and chernozem soil fractions than the whole soil spectra. FTIR–PAS provides better sensitivity and reproducibility in the 4000–2000 cm–1 region and ATR–FTIR in the 2000–100 cm–1 region.

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Compositions of n-Alkanes and n-Methyl Ketones in Soils of the Forest-Park Zone of Moscow

Cited by 10 publications

References 28 publications

Transformation of <i>n</i>-alkanes from plant to soil: a review

Transformation of <i>n</i>-alkanes from plant to soil: a review

n-Alkane Distribution—A Paleovegetation Change Indicator during the Period from Late Glacial to Late Holocene on Russian Plain (Bryansk Region)

FTIR Photoacoustic and ATR Spectroscopies of Soils with Aggregate Size Fractionation by Dry Sieving

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Compositions of n-Alkanes and n-Methyl Ketones in Soils of the Forest-Park Zone of Moscow

Cited by 10 publications

References 28 publications

Transformation of &lt;i&gt;n&lt;/i&gt;-alkanes from plant to soil: a review

Transformation of &lt;i&gt;n&lt;/i&gt;-alkanes from plant to soil: a review

n-Alkane Distribution—A Paleovegetation Change Indicator during the Period from Late Glacial to Late Holocene on Russian Plain (Bryansk Region)

FTIR Photoacoustic and ATR Spectroscopies of Soils with Aggregate Size Fractionation by Dry Sieving

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Transformation of <i>n</i>-alkanes from plant to soil: a review

Transformation of <i>n</i>-alkanes from plant to soil: a review