Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin”

Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Preston, Caroline M. [verfasserIn] Nault, Jason R. [verfasserIn] Trofymow, J. A. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2009

Schlagwörter:	C MAS NMR litter decomposition lignin tannin cutin CIDET δ C

Übergeordnetes Werk:	Enthalten in: Ecosystems - Springer-Verlag, 2000, 12(2009), 7 vom: 16. Sept., Seite 1078-1102
Übergeordnetes Werk:	volume:12 ; year:2009 ; number:7 ; day:16 ; month:09 ; pages:1078-1102

Links:	Volltext

DOI / URN:	10.1007/s10021-009-9267-z

Katalog-ID:	SPR008078068

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allfields	10.1007/s10021-009-9267-z doi (DE-627)SPR008078068 (SPR)s10021-009-9267-z-e DE-627 ger DE-627 rakwb eng Preston, Caroline M. verfasserin aut Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin” 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining. C MAS NMR (dpeaa)DE-He213 litter decomposition (dpeaa)DE-He213 lignin (dpeaa)DE-He213 tannin (dpeaa)DE-He213 cutin (dpeaa)DE-He213 CIDET (dpeaa)DE-He213 δ (dpeaa)DE-He213 C (dpeaa)DE-He213 Nault, Jason R. verfasserin aut Trofymow, J. A. verfasserin aut Enthalten in Ecosystems Springer-Verlag, 2000 12(2009), 7 vom: 16. Sept., Seite 1078-1102 (DE-627)SPR008072272 nnns volume:12 year:2009 number:7 day:16 month:09 pages:1078-1102 https://dx.doi.org/10.1007/s10021-009-9267-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 12 2009 7 16 09 1078-1102
spelling	10.1007/s10021-009-9267-z doi (DE-627)SPR008078068 (SPR)s10021-009-9267-z-e DE-627 ger DE-627 rakwb eng Preston, Caroline M. verfasserin aut Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin” 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining. C MAS NMR (dpeaa)DE-He213 litter decomposition (dpeaa)DE-He213 lignin (dpeaa)DE-He213 tannin (dpeaa)DE-He213 cutin (dpeaa)DE-He213 CIDET (dpeaa)DE-He213 δ (dpeaa)DE-He213 C (dpeaa)DE-He213 Nault, Jason R. verfasserin aut Trofymow, J. A. verfasserin aut Enthalten in Ecosystems Springer-Verlag, 2000 12(2009), 7 vom: 16. Sept., Seite 1078-1102 (DE-627)SPR008072272 nnns volume:12 year:2009 number:7 day:16 month:09 pages:1078-1102 https://dx.doi.org/10.1007/s10021-009-9267-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 12 2009 7 16 09 1078-1102
allfields_unstemmed	10.1007/s10021-009-9267-z doi (DE-627)SPR008078068 (SPR)s10021-009-9267-z-e DE-627 ger DE-627 rakwb eng Preston, Caroline M. verfasserin aut Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin” 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining. C MAS NMR (dpeaa)DE-He213 litter decomposition (dpeaa)DE-He213 lignin (dpeaa)DE-He213 tannin (dpeaa)DE-He213 cutin (dpeaa)DE-He213 CIDET (dpeaa)DE-He213 δ (dpeaa)DE-He213 C (dpeaa)DE-He213 Nault, Jason R. verfasserin aut Trofymow, J. A. verfasserin aut Enthalten in Ecosystems Springer-Verlag, 2000 12(2009), 7 vom: 16. Sept., Seite 1078-1102 (DE-627)SPR008072272 nnns volume:12 year:2009 number:7 day:16 month:09 pages:1078-1102 https://dx.doi.org/10.1007/s10021-009-9267-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 12 2009 7 16 09 1078-1102
allfieldsGer	10.1007/s10021-009-9267-z doi (DE-627)SPR008078068 (SPR)s10021-009-9267-z-e DE-627 ger DE-627 rakwb eng Preston, Caroline M. verfasserin aut Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin” 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining. C MAS NMR (dpeaa)DE-He213 litter decomposition (dpeaa)DE-He213 lignin (dpeaa)DE-He213 tannin (dpeaa)DE-He213 cutin (dpeaa)DE-He213 CIDET (dpeaa)DE-He213 δ (dpeaa)DE-He213 C (dpeaa)DE-He213 Nault, Jason R. verfasserin aut Trofymow, J. A. verfasserin aut Enthalten in Ecosystems Springer-Verlag, 2000 12(2009), 7 vom: 16. Sept., Seite 1078-1102 (DE-627)SPR008072272 nnns volume:12 year:2009 number:7 day:16 month:09 pages:1078-1102 https://dx.doi.org/10.1007/s10021-009-9267-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 12 2009 7 16 09 1078-1102
allfieldsSound	10.1007/s10021-009-9267-z doi (DE-627)SPR008078068 (SPR)s10021-009-9267-z-e DE-627 ger DE-627 rakwb eng Preston, Caroline M. verfasserin aut Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin” 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining. C MAS NMR (dpeaa)DE-He213 litter decomposition (dpeaa)DE-He213 lignin (dpeaa)DE-He213 tannin (dpeaa)DE-He213 cutin (dpeaa)DE-He213 CIDET (dpeaa)DE-He213 δ (dpeaa)DE-He213 C (dpeaa)DE-He213 Nault, Jason R. verfasserin aut Trofymow, J. A. verfasserin aut Enthalten in Ecosystems Springer-Verlag, 2000 12(2009), 7 vom: 16. Sept., Seite 1078-1102 (DE-627)SPR008072272 nnns volume:12 year:2009 number:7 day:16 month:09 pages:1078-1102 https://dx.doi.org/10.1007/s10021-009-9267-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER AR 12 2009 7 16 09 1078-1102
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source	Enthalten in Ecosystems 12(2009), 7 vom: 16. Sept., Seite 1078-1102 volume:12 year:2009 number:7 day:16 month:09 pages:1078-1102
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author	Preston, Caroline M.
spellingShingle	Preston, Caroline M. misc C MAS NMR misc litter decomposition misc lignin misc tannin misc cutin misc CIDET misc δ misc C Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin”
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topic_title	Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin” C MAS NMR (dpeaa)DE-He213 litter decomposition (dpeaa)DE-He213 lignin (dpeaa)DE-He213 tannin (dpeaa)DE-He213 cutin (dpeaa)DE-He213 CIDET (dpeaa)DE-He213 δ (dpeaa)DE-He213 C (dpeaa)DE-He213
topic	misc C MAS NMR misc litter decomposition misc lignin misc tannin misc cutin misc CIDET misc δ misc C
topic_unstemmed	misc C MAS NMR misc litter decomposition misc lignin misc tannin misc cutin misc CIDET misc δ misc C
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title	Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin”
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title_full	Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin”
author_sort	Preston, Caroline M.
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title_sort	chemical changes during 6 years of decomposition of 11 litters in some canadian forest sites. part 2. 13c abundance, solid-state 13c nmr spectroscopy and the meaning of “lignin”
title_auth	Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin”
abstract	Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining.
abstractGer	Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining.
abstract_unstemmed	Abstract There is still a poor understanding of how changes in the organic composition of litter contribute to slowing or even cessation of decomposition. Using 13C nuclear magnetic resonance (NMR) spectroscopy of samples from the Canadian Intersite Decomposition Experiment (CIDET), we asked whether increasing lignin per se could account for the well-known increase in acid-unhydrolyzable residue (AUR), and secondly, using three litters from four sites with different mean annual temperatures, whether changes in organic composition would follow similar trajectories with C mass loss. At 6 years, there was 16–39% C remaining for 10 foliar litters and wood blocks at a site with rapid initial decomposition, and higher amounts remaining for three species at three colder sites. 13C NMR spectra obtained with rapid cross-polarization (CP) mainly showed increasing similarity among the foliar litters, although wood showed little change in composition. Foliage generally showed loss of O- and di-O-alkyl C, mainly from carbohydrate, and increase in alkyl, aromatic, phenolic and carboxyl C. However, O-alkyl C loss was limited, especially for litters with slow initial decomposition, and many litters showed relatively small changes in intensity distribution. Quantitative 13C (“BD”) spectra showed similar trends, but even smaller changes in C composition, and 6-year CP difference spectra showed that C was lost across the whole range of structures. Changes in $ δ^{13} $C were small and variable, but could be correlated to some extent with loss of carbohydrates versus tannins. Lignin was not selectively preserved, and the increase of resistant structures derived from lignin, tannins, and cutin collectively accounts for increasing AUR. Compositional changes of NMR C fractions across sites with different temperatures were small and inconsistent, likely due to the influence of other site factors; however, changes in their contents did largely follow consistent trajectories with %C remaining.
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title_short	Chemical Changes During 6 Years of Decomposition of 11 Litters in Some Canadian Forest Sites. Part 2. 13C Abundance, Solid-State 13C NMR Spectroscopy and the Meaning of “Lignin”
url	https://dx.doi.org/10.1007/s10021-009-9267-z
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