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

<p>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 <span class="inline-formul...

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Autores principales:	C. L. Thomas, B. Jansen, E. E. van Loon, G. L. B. Wiesenberg
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental sciences GE1-350 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/28c012e4d2ed4f6ab6f24eb74b64cec8
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spelling	oai:doaj.org-article:28c012e4d2ed4f6ab6f24eb74b64cec82021-11-25T13:45:58ZTransformation of <i>n</i>-alkanes from plant to soil: a review10.5194/soil-7-785-20212199-39712199-398Xhttps://doaj.org/article/28c012e4d2ed4f6ab6f24eb74b64cec82021-11-01T00:00:00Zhttps://soil.copernicus.org/articles/7/785/2021/soil-7-785-2021.pdfhttps://doaj.org/toc/2199-3971https://doaj.org/toc/2199-398X<p>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 <span class="inline-formula"><i>n</i></span>-alkanes, can provide insight into the cycling of bulk SOM. While studies of lipid biomarkers, particularly <span class="inline-formula"><i>n</i></span>-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 <span class="inline-formula"><i>n</i></span>-alkanes and their transformation from plant to soil. Our major findings were (1) a nearly ubiquitous trend of decreased total concentration of <span class="inline-formula"><i>n</i></span>-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 <span class="inline-formula"><i>n</i></span>-alkanes represented by a decrease in either carbon preference index (CPI) or odd-over-even predominance (OEP) with depth, indicating degradation of the <span class="inline-formula"><i>n</i></span>-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 <span class="inline-formula"><i>n</i></span>-alkanes through the complete continuum from plant to soil.</p>C. L. ThomasC. L. ThomasB. JansenE. E. van LoonG. L. B. WiesenbergCopernicus PublicationsarticleEnvironmental sciencesGE1-350GeologyQE1-996.5ENSOIL, Vol 7, Pp 785-809 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Geology QE1-996.5
spellingShingle	Environmental sciences GE1-350 Geology QE1-996.5 C. L. Thomas C. L. Thomas B. Jansen E. E. van Loon G. L. B. Wiesenberg Transformation of <i>n</i>-alkanes from plant to soil: a review
description	<p>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 <span class="inline-formula"><i>n</i></span>-alkanes, can provide insight into the cycling of bulk SOM. While studies of lipid biomarkers, particularly <span class="inline-formula"><i>n</i></span>-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 <span class="inline-formula"><i>n</i></span>-alkanes and their transformation from plant to soil. Our major findings were (1) a nearly ubiquitous trend of decreased total concentration of <span class="inline-formula"><i>n</i></span>-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 <span class="inline-formula"><i>n</i></span>-alkanes represented by a decrease in either carbon preference index (CPI) or odd-over-even predominance (OEP) with depth, indicating degradation of the <span class="inline-formula"><i>n</i></span>-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 <span class="inline-formula"><i>n</i></span>-alkanes through the complete continuum from plant to soil.</p>
format	article
author	C. L. Thomas C. L. Thomas B. Jansen E. E. van Loon G. L. B. Wiesenberg
author_facet	C. L. Thomas C. L. Thomas B. Jansen E. E. van Loon G. L. B. Wiesenberg
author_sort	C. L. Thomas
title	Transformation of <i>n</i>-alkanes from plant to soil: a review
title_short	Transformation of <i>n</i>-alkanes from plant to soil: a review
title_full	Transformation of <i>n</i>-alkanes from plant to soil: a review
title_fullStr	Transformation of <i>n</i>-alkanes from plant to soil: a review
title_full_unstemmed	Transformation of <i>n</i>-alkanes from plant to soil: a review
title_sort	transformation of <i>n</i>-alkanes from plant to soil: a review
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/28c012e4d2ed4f6ab6f24eb74b64cec8
work_keys_str_mv	AT clthomas transformationofinialkanesfromplanttosoilareview AT clthomas transformationofinialkanesfromplanttosoilareview AT bjansen transformationofinialkanesfromplanttosoilareview AT eevanloon transformationofinialkanesfromplanttosoilareview AT glbwiesenberg transformationofinialkanesfromplanttosoilareview
_version_	1718413426260180992

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

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