Annual basal area increment and growth duration of Pinus taeda in response to eight years of free-air carbon dioxide enrichment

David J.P. Moore, Susanne Aref, Ringo M. Ho, Jeffrey S. Pippen, Jason G. Hamilton, Evan H Delucia

Research output: Contribution to journalArticle

Abstract

Rising CO2 is predicted to increase forest productivity, although the duration of the response and how it might be altered by variation in rainfall, temperature and other environmental variables are not well understood. We measured the basal area of rapidly growing Pinus taeda trees exposed to free-air CO2 enrichment for 8 years and used these measurements to estimate monthly and annual growth. We used these measurements in a statistical model to estimate the start and end of growth in each year. Elevated CO2 increased the basal area increment (BAI) of trees by 13-27%. In most years, exposure to elevated CO2 increased the growth rate but not the duration of the active growth period. With the exception of 1 year following an extreme drought and a severe ice storm, BAI was positively correlated with the amount of rainfall during the active growth period. The interannual variation in the relative enhancement of BAI caused by elevated CO2 was strongly related to temperature and rainfall, and was greatest in years with high vapor pressure deficit. There was no evidence of a systematic reduction in the stimulation of growth during the first 8 years of this experiment, suggesting that the hypothesized limitation of the CO2 response caused by nitrogen availability has yet to occur.

Original languageEnglish (US)
Pages (from-to)1367-1377
Number of pages11
JournalGlobal change biology
Volume12
Issue number8
DOIs
StatePublished - Aug 1 2006

Fingerprint

carbon dioxide enrichment
basal area
Carbon Dioxide
air
Rain
Air
rainfall
ice storm
Drought
Ice
Vapor pressure
vapor pressure
annual variation
Nitrogen
Productivity
temperature
drought
Availability
productivity
Temperature

Keywords

  • Carbon gain
  • Climate change
  • Dendrometer bands
  • Forests
  • Phenology
  • Precipitation
  • Stem growth
  • Temperature

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Ecology
  • Environmental Science(all)

Cite this

Annual basal area increment and growth duration of Pinus taeda in response to eight years of free-air carbon dioxide enrichment. / Moore, David J.P.; Aref, Susanne; Ho, Ringo M.; Pippen, Jeffrey S.; Hamilton, Jason G.; Delucia, Evan H.

In: Global change biology, Vol. 12, No. 8, 01.08.2006, p. 1367-1377.

Research output: Contribution to journalArticle

Moore, David J.P. ; Aref, Susanne ; Ho, Ringo M. ; Pippen, Jeffrey S. ; Hamilton, Jason G. ; Delucia, Evan H. / Annual basal area increment and growth duration of Pinus taeda in response to eight years of free-air carbon dioxide enrichment. In: Global change biology. 2006 ; Vol. 12, No. 8. pp. 1367-1377.
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