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The role of harvest residue in rotation cycle carbon balance in loblolly pine plantations. Respiration partitioning approach.

Publication ,  Journal Article
Noormets, A; McNulty, SG; Domec, J-C; Gavazzi, M; Sun, G; King, JS
Published in: Global change biology
October 2012

Timber harvests remove a significant portion of ecosystem carbon. While some of the wood products moved off-site may last past the harvest cycle of the particular forest crop, the effect of the episodic disturbances on long-term on-site carbon sequestration is unclear. The current study presents a 25 year carbon budget estimate for a typical commercial loblolly pine plantation in North Carolina, USA, spanning the entire rotation cycle. We use a chronosequence approach, based on 5 years of data from two adjacent loblolly pine plantations. We found that while the ecosystem is very productive (GEP up to 2900 g m-2  yr-1 , NEE at maturity about 900 g C m-2  yr-1 ), the production of detritus does not offset the loss of soil C through heterotrophic respiration (RH ) on an annual basis. The input of dead roots at harvest may offset the losses, but there remain significant uncertainties about both the size and decomposition dynamics of this pool. The pulse of detritus produced at harvest resulted in a more than 60% increase in RH . Contrary to expectations, the peak of RH in relation to soil respiration (SR) did not occur immediately after the harvest disturbance, but in years 3 and 4, suggesting that a pool of roots may have remained alive for the first few years. On the other hand, the pulse of aboveground RH from coarse woody debris lasted only 2 years. The postharvest increase in RH was offset by a decrease in autotrophic respiration such that the total ecosystem respiration changed little. The observed flux rates show that even though the soil C pool may not necessarily decrease in the long-term, old soil C is definitely an active component in the site C cycle, contributing about 25-30% of the RH over the rotation cycle.

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Published In

Global change biology

DOI

EISSN

1365-2486

ISSN

1354-1013

Publication Date

October 2012

Volume

18

Issue

10

Start / End Page

3186 / 3201

Related Subject Headings

  • Ecology
  • 41 Environmental sciences
  • 37 Earth sciences
  • 31 Biological sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences
 

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Noormets, A., McNulty, S. G., Domec, J.-C., Gavazzi, M., Sun, G., & King, J. S. (2012). The role of harvest residue in rotation cycle carbon balance in loblolly pine plantations. Respiration partitioning approach. Global Change Biology, 18(10), 3186–3201. https://doi.org/10.1111/j.1365-2486.2012.02776.x
Noormets, Asko, Steve G. McNulty, Jean-Christophe Domec, Michael Gavazzi, Ge Sun, and John S. King. “The role of harvest residue in rotation cycle carbon balance in loblolly pine plantations. Respiration partitioning approach.Global Change Biology 18, no. 10 (October 2012): 3186–3201. https://doi.org/10.1111/j.1365-2486.2012.02776.x.
Noormets A, McNulty SG, Domec J-C, Gavazzi M, Sun G, King JS. The role of harvest residue in rotation cycle carbon balance in loblolly pine plantations. Respiration partitioning approach. Global change biology. 2012 Oct;18(10):3186–201.
Noormets, Asko, et al. “The role of harvest residue in rotation cycle carbon balance in loblolly pine plantations. Respiration partitioning approach.Global Change Biology, vol. 18, no. 10, Oct. 2012, pp. 3186–201. Epmc, doi:10.1111/j.1365-2486.2012.02776.x.
Noormets A, McNulty SG, Domec J-C, Gavazzi M, Sun G, King JS. The role of harvest residue in rotation cycle carbon balance in loblolly pine plantations. Respiration partitioning approach. Global change biology. 2012 Oct;18(10):3186–3201.
Journal cover image

Published In

Global change biology

DOI

EISSN

1365-2486

ISSN

1354-1013

Publication Date

October 2012

Volume

18

Issue

10

Start / End Page

3186 / 3201

Related Subject Headings

  • Ecology
  • 41 Environmental sciences
  • 37 Earth sciences
  • 31 Biological sciences
  • 06 Biological Sciences
  • 05 Environmental Sciences