Show simple item record

dc.contributor.authorCrow, Susan E.
dc.contributor.authorLajtha, Kate
dc.contributor.authorFilley, Timothy R.
dc.contributor.authorSwanston, Christopher
dc.contributor.authorBowden, Richard D.
dc.contributor.authorCaldwell, Bruce E.
dc.date.accessioned2018-07-09T16:57:33Z
dc.date.available2018-07-09T16:57:33Z
dc.date.issued2009-07
dc.identifier.citationCrow, S.E., Lajtha, K., Filley, T.R., et al. (2009). Sources of plant‐derived carbon and stability of organic matter in soil: implications for global change. Global Change Biology, 15(8): 2003-2019. doi: 10.1111/j.1365-2486.2009.01850.xen_US
dc.identifier.issne1365-2486
dc.identifier.urihttp://hdl.handle.net/10456/46629
dc.description.abstractAlterations in forest productivity and changes in the relative proportion of above‐ and belowground biomass may have nonlinear effects on soil organic matter (SOM) storage. To study the influence of plant litter inputs on SOM accumulation, the Detritus Input Removal and Transfer (DIRT) Experiment continuously alters above‐ and belowground plant inputs to soil by a combination of trenching, screening, and litter addition. Here, we used biogeochemical indicators [i.e., cupric oxide extractable lignin‐derived phenols and suberin/cutin‐derived substituted fatty acids (SFA)] to identify the dominant sources of plant biopolymers in SOM and various measures [i.e., soil density fractionation, laboratory incubation, and radiocarbon‐based mean residence time (MRT)] to assess the stability of SOM in two contrasting forests within the DIRT Experiment: an aggrading deciduous forest and an old‐growth coniferous forest. In the deciduous forest, removal of both above‐ and belowground inputs increased the total amount of SFA over threefold compared with the control, and shifted the SFA signature towards a root‐dominated source. Concurrently, light fraction MRT increased by 101 years and C mineralization during incubation decreased compared with the control. Together, these data suggest that root‐derived aliphatic compounds are a source of SOM with greater relative stability than leaf inputs at this site. In the coniferous forest, roots were an important source of soil lignin‐derived phenols but needle‐derived, rather than root‐derived, aliphatic compounds were preferentially preserved in soil. Fresh wood additions elevated the amount of soil C recovered as light fraction material but also elevated mineralization during incubation compared with other DIRT treatments, suggesting that not all of the added soil C is directly stabilized. Aboveground needle litter additions, which are more N‐rich than wood debris, resulted in accelerated mineralization of previously stored soil carbon. In summary, our work demonstrates that the dominant plant sources of SOM differed substantially between forest types. Furthermore, inputs to and losses from soil C pools likely will not be altered uniformly by changes in litter input rates.en_US
dc.language.isoen_USen_US
dc.publisherWiley Blackwellen_US
dc.relation.ispartofGlobal Change Biologyen_US
dc.relation.isversionofhttps://doi.org/10.1111/j.1365-2486.2009.01850.xen_US
dc.rightsThis article is published by Wiley Blackwell in Global Change Biology (2009) Crow, et al. All rights reserved.en_US
dc.subjectcarbonen_US
dc.subjectconiferous foresten_US
dc.subjectCutinen_US
dc.subjectDeciduous foresten_US
dc.subjectligninen_US
dc.subjectnet primary productivityen_US
dc.subjectSoil organic matteren_US
dc.subjectsuberinen_US
dc.titleSources of plant‐derived carbon and stability of organic matter in soil: implications for global changeen_US
dc.description.versionPublished articleen_US
dc.contributor.departmentBiologyen_US
dc.description.embargoThis article is not available to the general public. Please contact the reprint author or publisher for access to this article.en_US
dc.citation.volume15en_US
dc.citation.issue8en_US
dc.citation.spage2003en_US
dc.citation.epage2019en_US
dc.identifier.doi10.1111/j.1365-2486.2009.01850.x
dc.contributor.avlauthorBowden, Richard D.


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record