Woody debris contribution to the carbon budget of selectively logged and maturing mid-latitude forests

Wendy H. Liu, David M. Bryant, Lucy R. Hutyra, Scott Saleska, Elizabeth Hammond-Pyle, Daniel Curran, Steven C. Wofsy

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Woody debris (WD) is an important component of forest C budgets, both as a C reservoir and source of CO2 to the atmosphere. We used an infrared gas analyzer and closed dynamic chamber to measure CO2 efflux from downed coarse WD (CWD; diameter≥7.5 cm) and fine WD (FWD; 7.5 cm > diameter≥2 cm) to assess respiration in a selectively logged forest and a maturing forest (control site) in the northeastern USA. We developed two linear regression models to predict WD respiration: one based on WD temperature, moisture, and size (R2 = 0.57), and the other on decay class and air temperature (R2 = 0.32). WD respiration (0.28±0.09 Mg C ha-1 year-1) contributed only ≈2% of total ecosystem respiration (12.3±0.7 Mg C ha-1 year-1, 1999-2003), but net C flux from CWD accounted for up to 30% of net ecosystem exchange in the maturing forest. C flux from CWD on the logged site increased modestly, from 0.61±0.29 Mg C ha-1 year-1 prior to logging to 0.77±0.23 Mg C ha-1 year-1 after logging, reflecting increased CWD stocks. FWD biomass and associated respiration flux were ≈7 times and ≈5 times greater, respectively, in the logged site than the control site. The net C flux associated with CWD, including inputs and respiratory outputs, was 0.35±0.19 Mg C ha-1 year-1 (net C sink) in the control site and -0.30±0.30 Mg C ha-1 year-1 (net C source) in the logged site. We infer that accumulation of WD may represent a small net C sink in maturing northern hardwood forests. Disturbance, such as selective logging, can enlarge the WD pool, increasing the net C flux from the WD pool to the atmosphere and potentially causing it to become a net C source.

Original languageEnglish (US)
Pages (from-to)108-117
Number of pages10
JournalOecologia
Volume148
Issue number1
DOIs
StatePublished - May 2006

Fingerprint

woody debris
carbon budget
cell respiration
logging
carbon
respiration
carbon dioxide
net ecosystem exchange
ecosystem respiration
coarse woody debris
hardwood forests
air temperature
deterioration
gases
selective logging
atmosphere
biomass
temperature
moisture
disturbance

Keywords

  • Coarse woody debris
  • Fine woody debris
  • Infrared gas analyzer
  • Northern hardwood forest
  • Respiration

ASJC Scopus subject areas

  • Ecology

Cite this

Liu, W. H., Bryant, D. M., Hutyra, L. R., Saleska, S., Hammond-Pyle, E., Curran, D., & Wofsy, S. C. (2006). Woody debris contribution to the carbon budget of selectively logged and maturing mid-latitude forests. Oecologia, 148(1), 108-117. https://doi.org/10.1007/s00442-006-0356-9

Woody debris contribution to the carbon budget of selectively logged and maturing mid-latitude forests. / Liu, Wendy H.; Bryant, David M.; Hutyra, Lucy R.; Saleska, Scott; Hammond-Pyle, Elizabeth; Curran, Daniel; Wofsy, Steven C.

In: Oecologia, Vol. 148, No. 1, 05.2006, p. 108-117.

Research output: Contribution to journalArticle

Liu, WH, Bryant, DM, Hutyra, LR, Saleska, S, Hammond-Pyle, E, Curran, D & Wofsy, SC 2006, 'Woody debris contribution to the carbon budget of selectively logged and maturing mid-latitude forests', Oecologia, vol. 148, no. 1, pp. 108-117. https://doi.org/10.1007/s00442-006-0356-9
Liu, Wendy H. ; Bryant, David M. ; Hutyra, Lucy R. ; Saleska, Scott ; Hammond-Pyle, Elizabeth ; Curran, Daniel ; Wofsy, Steven C. / Woody debris contribution to the carbon budget of selectively logged and maturing mid-latitude forests. In: Oecologia. 2006 ; Vol. 148, No. 1. pp. 108-117.
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abstract = "Woody debris (WD) is an important component of forest C budgets, both as a C reservoir and source of CO2 to the atmosphere. We used an infrared gas analyzer and closed dynamic chamber to measure CO2 efflux from downed coarse WD (CWD; diameter≥7.5 cm) and fine WD (FWD; 7.5 cm > diameter≥2 cm) to assess respiration in a selectively logged forest and a maturing forest (control site) in the northeastern USA. We developed two linear regression models to predict WD respiration: one based on WD temperature, moisture, and size (R2 = 0.57), and the other on decay class and air temperature (R2 = 0.32). WD respiration (0.28±0.09 Mg C ha-1 year-1) contributed only ≈2{\%} of total ecosystem respiration (12.3±0.7 Mg C ha-1 year-1, 1999-2003), but net C flux from CWD accounted for up to 30{\%} of net ecosystem exchange in the maturing forest. C flux from CWD on the logged site increased modestly, from 0.61±0.29 Mg C ha-1 year-1 prior to logging to 0.77±0.23 Mg C ha-1 year-1 after logging, reflecting increased CWD stocks. FWD biomass and associated respiration flux were ≈7 times and ≈5 times greater, respectively, in the logged site than the control site. The net C flux associated with CWD, including inputs and respiratory outputs, was 0.35±0.19 Mg C ha-1 year-1 (net C sink) in the control site and -0.30±0.30 Mg C ha-1 year-1 (net C source) in the logged site. We infer that accumulation of WD may represent a small net C sink in maturing northern hardwood forests. Disturbance, such as selective logging, can enlarge the WD pool, increasing the net C flux from the WD pool to the atmosphere and potentially causing it to become a net C source.",
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