Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Impact of logging on aboveground biomass stocks in lowland rain forest, Papua New Guinea

Jane Bryan, Phil Shearman, Julian Ash and J. B. Kirkpatrick
Ecological Applications
Vol. 20, No. 8 (December 2010), pp. 2096-2103
Published by: Wiley
Stable URL: http://www.jstor.org/stable/29779606
Page Count: 8
  • Download ($42.00)
  • Subscribe ($19.50)
  • Cite this Item
Preview not available
Preview not available

Abstract

Greenhouse-gas emissions resulting from logging are poorly quantified across the tropics. There is a need for robust measurement of rain forest biomass and the impacts of logging from which carbon losses can be reliably estimated at regional and global scales. We used a modified Bitterlich plotless technique to measure aboveground live biomass at six unlogged and six logged rain forest areas (coupes) across two ~3000-ha regions at the Makapa concession in lowland Papua New Guinea. "Reduced-impact logging" is practiced at Makapa. We found the mean unlogged aboveground biomass in the two regions to be 192.96 ± 4.44 Mg/ha and 252.92 ± 7.00 Mg/ha (mean ± SE), which was reduced by logging to 146.92 ± 4.58 Mg/ha and 158.84 ± 4.16, respectively. Killed biomass was not a fixed proportion, but varied with unlogged biomass, with 24% killed in the lower-biomass region, and 37% in the higher-biomass region. Across the two regions logging resulted in a mean aboveground carbon loss of 35 ± 2.8 Mg/ha. The plotless technique proved efficient at estimating mean aboveground biomass and logging damage. We conclude that substantial bias is likely to occur within biomass estimates derived from single unreplicated plots.

Page Thumbnails

  • Thumbnail: Page 
2096
    2096
  • Thumbnail: Page 
2097
    2097
  • Thumbnail: Page 
2098
    2098
  • Thumbnail: Page 
2099
    2099
  • Thumbnail: Page 
2100
    2100
  • Thumbnail: Page 
2101
    2101
  • Thumbnail: Page 
2102
    2102
  • Thumbnail: Page 
2103
    2103