Increased coniferous needle inputs accelerate decomposition of soil carbon in an old-growth forest

Simple item page
dc.citation.epage2232en_US
dc.citation.spage2224en_US
dc.citation.volume258en_US
dc.contributor.authorCrow, Susan E.
dc.contributor.authorLajtha, Kate
dc.contributor.authorBowden, Richard D.
dc.contributor.authorYano, Yuriko
dc.contributor.authorBrant, Justin B.
dc.contributor.authorCaldwell, Bruce E.
dc.contributor.authorSulzman, Elizabeth W.
dc.contributor.avlauthorBowden, Richard D.
dc.contributor.departmentBiologyen_US
dc.date.accessioned2018-07-09T15:57:32Z
dc.date.available2018-07-09T15:57:32Z
dc.date.issued2009
dc.description.abstractChanges in temperature, precipitation, and atmospheric carbon dioxide (CO2) concentration that are expected in the coming decades will have profound impacts on terrestrial ecosystem net primary production (NPP). Nearly all models linking forest NPP with soil carbon (C) predict that increased NPP will result in either unchanged or increased soil C storage, and that decreased NPP will result in decreased soil C storage. However, linkages between forest productivity and soil C storage may not be so simple and direct. In an old-growth coniferous forest located in the H.J. Andrews Experimental Forest, OR, USA, we experimentally doubled needle litter inputs, and found that actual soil respiration rates exceeded those expected due to the C added by the extra needles. Here, we estimated that this ‘priming effect’ accounted for 11.5–21.6% of annual CO2 efflux from litter-amended plots, or an additional 137–256 g C m 2 yr 1 loss of stored C to the atmosphere. Soil priming has seasonal, with greatest amounts occurring in June–August coincident with peaks in temperature and dry summer conditions. As a result of priming,mineral soil was more resistant to further mineralization during laboratory incubations. Soil lignin-derived phenols in the Double Litter plots were more oxidized than in the control, suggesting that the soil residue was more degraded. Our hypothesis that excess dissolved organic C produced from the added litter provided the link between the forest floor and mineral soil and a substrate for soil priming was not supported. Instead, the rhizosphere, and associated mycorrhizal fungi, likely responded directly to the added aboveground litter inputs. Our results revealed that enhanced NPP may lead to accelerated processing of some stored soil C, but that the effects of increased NPP on ecosystem C storage will be based on a net balance among all ecosystem C pools and are likely to be ecosystem-dependant. Forest C models need to include these complex linkages between forest productivity and soil C storage.en_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.description.versionPublished articleen_US
dc.identifier.citationCrow, S.E., Lajtha K., Bowden, R.D., et al. (2009). Increased coniferous needle inputs accelerate decomposition of soil carbon in an old-growth forest. Forest Ecology and Management, 258: 2224-2232. doi: 10.1016/j.foreco.2009.01.014.en_US
dc.identifier.doi10.1016/j.foreco.2009.01.014.
dc.identifier.issn0378-1127
dc.identifier.urihttp://hdl.handle.net/10456/46620
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.relation.ispartofForest Ecology and Managementen_US
dc.relation.isversionofhttps://doi.org/10.1016/j.foreco.2009.01.014en_US
dc.rightsThis article is published by Elsevier in Forest Ecology and Management (2009) by Crow, et al. All rights reserved.en_US
dc.subjectAndisolen_US
dc.subjectCarbon balanceen_US
dc.subjectConiferous foresten_US
dc.subjectPriming effecten_US
dc.subjectSoil primingen_US
dc.titleIncreased coniferous needle inputs accelerate decomposition of soil carbon in an old-growth foresten_US
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
Bowden_2009_FE&M_Cover.pdf
Size:
454.29 KB
Format:
Adobe Portable Document Format
Description:
cover
Download
No Thumbnail Available
Name:
1-s2.0-S0378112709000280-main.pdf
Size:
369.9 KB
Format:
Adobe Portable Document Format
Description:
Main Document
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
61 B
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Faculty Scholarship and Open Access Collection