Controls over aboveground forest carbon density on Barro Colorado Island, Panama

J. Mascaro, G. P. Asner, H. C. Muller-Landau, M. Van Breugel, J. Hall, K. Dahlin

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Despite the importance of tropical forests to the global carbon cycle, ecological controls over landscape-level variation in live aboveground carbon density (ACD) in tropical forests are poorly understood. Here, we conducted a spatially comprehensive analysis of ACD variation for a continental tropical forest g-Barro Colorado Island, Panama (BCI) g-and tested site factors that may control such variation. We mapped ACD over 1256 ha of BCI using airborne Light Detection and Ranging (LiDAR), which was well-correlated with ground-based measurements of ACD in Panamanian forests of various ages (2 Combining double low line 0.84, RMSE Combining double low line 17 Mg C-1, 0.0001). We used multiple regression to examine controls over LiDAR-derived ACD, including slope angle, forest age, bedrock, and soil texture. Collectively, these variables explained 14 % of the variation in ACD at 30-m resolution, and explained 33 % at 100-m resolution. At all resolutions, slope (linked to underlying bedrock variation) was the strongest driving factor; standing carbon stocks were generally higher on steeper slopes. This result suggests that physiography may be more important in controlling ACD variation in Neotropical forests than currently thought. Although BCI has been largely undisturbed by humans for a century, past land-use over approximately half of the island still influences ACD variation, with younger forests (80g-130 years old) averaging ∼15 % less carbon storage than old-growth forests (>400 years old). If other regions of relatively old tropical secondary forests also store less carbon aboveground than primary forests, the effects on the global carbon cycle could be substantial and difficult to detect with traditional satellite monitoring.

Original languageEnglish (US)
Pages (from-to)1615-1629
Number of pages15
JournalBiogeosciences
Volume8
Issue number6
DOIs
StatePublished - Jun 30 2011
Externally publishedYes

Fingerprint

Panama
carbon
tropical forests
tropical forest
lidar
bedrock
carbon cycle
primary forests
old-growth forests
secondary forests
ground-based measurement
slope angle
old-growth forest
soil texture
secondary forest
carbon sequestration
carbon sinks
multiple regression
land use
monitoring

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes

Cite this

Mascaro, J., Asner, G. P., Muller-Landau, H. C., Van Breugel, M., Hall, J., & Dahlin, K. (2011). Controls over aboveground forest carbon density on Barro Colorado Island, Panama. Biogeosciences, 8(6), 1615-1629. https://doi.org/10.5194/bg-8-1615-2011

Controls over aboveground forest carbon density on Barro Colorado Island, Panama. / Mascaro, J.; Asner, G. P.; Muller-Landau, H. C.; Van Breugel, M.; Hall, J.; Dahlin, K.

In: Biogeosciences, Vol. 8, No. 6, 30.06.2011, p. 1615-1629.

Research output: Contribution to journalArticle

Mascaro, J, Asner, GP, Muller-Landau, HC, Van Breugel, M, Hall, J & Dahlin, K 2011, 'Controls over aboveground forest carbon density on Barro Colorado Island, Panama', Biogeosciences, vol. 8, no. 6, pp. 1615-1629. https://doi.org/10.5194/bg-8-1615-2011
Mascaro, J. ; Asner, G. P. ; Muller-Landau, H. C. ; Van Breugel, M. ; Hall, J. ; Dahlin, K. / Controls over aboveground forest carbon density on Barro Colorado Island, Panama. In: Biogeosciences. 2011 ; Vol. 8, No. 6. pp. 1615-1629.
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