, Volume 12, Issue 2, pp 261–278 | Cite as

Environmental and Biotic Controls over Aboveground Biomass Throughout a Tropical Rain Forest

  • Gregory P. AsnerEmail author
  • R. Flint Hughes
  • Timothy A. Varga
  • David E. Knapp
  • Ty Kennedy-Bowdoin


The environmental and biotic factors affecting spatial variation in canopy three-dimensional (3-D) structure and aboveground tree biomass (AGB) are poorly understood in tropical rain forests. We combined field measurements and airborne light detection and ranging (lidar) to quantify 3-D structure and AGB across a 5,016 ha rain forest reserve on the northeastern flank of Mauna Kea volcano, Hawaii Island. We compared AGB among native stands dominated by Metrosideros polymorpha found along a 600–1800 m elevation/climate gradient, and on three substrate-age classes of 5, 20, and 65 kyr. We also analyzed how alien tree invasion, canopy species dominance and topographic relief influence AGB levels. Canopy vertical profiles derived from lidar measurements were strong predictors (r 2 = 0.78) of AGB across sites and species. Mean AGB ranged from 48 to 363 Mg ha−1 in native forest stands. Increasing elevation corresponded to a 53–84% decrease in AGB levels, depending upon substrate age. Holding climate constant, changes in substrate age from 5 to 65 kyr corresponded to a 23–53% decline in biomass. Invasion by Psidium cattleianum and Ficus rubiginosa trees resulted in a 19–38% decrease in AGB, with these carbon losses mediated by substrate age. In contrast, the spread of former plantation tree species Fraxinus uhdei corresponded to a 7- to 10-fold increase in biomass. The effects of topographic relief at both local and regional scales were evident in the AGB maps, with poorly drained terrain harboring 76% lower biomass than forests on well-drained relief. Our results quantify the absolute and relative importance of environmental factors controlling spatial variation in tree biomass across a rain forest landscape, and highlight the rapid changes in carbon storage incurred following biological invasion.

Key words

airborne remote sensing alien invasive species biological invasion carbon storage Hawaii lidar light detection and ranging substrate age tropical forest vegetation structure 



We thank R. Martin, D. Okita, G. Sanchez, and the HETF field crew for field, laboratory, airborne, and/or logistical support. We thank M. Keller for early advice on the study. The Carnegie Airborne Observatory is funded by the W.M. Keck Foundation and William Hearst III. Application of the Carnegie Airborne Observatory to this study was supported by the Carnegie Institution and the USDA Forest Service. Access to field sites was provided by the State of Hawaii Department of Land and Natural Resources-Division of Forestry and Wildlife.

Supplementary material

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Gregory P. Asner
    • 1
    Email author
  • R. Flint Hughes
    • 2
  • Timothy A. Varga
    • 1
  • David E. Knapp
    • 1
  • Ty Kennedy-Bowdoin
    • 1
  1. 1.Department of Global EcologyCarnegie InstitutionStanfordUSA
  2. 2.Institute of Pacific Islands ForestryUSDA Forest ServiceHiloUSA

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