Skip to main content

Line Intersect Sampling of Forest Canopy Gaps

Buy Article:

$21.50 plus tax (Refund Policy)

Line intersect sampling (LIS) is commonly used to measure the fraction of forest area under canopy gaps (gap fraction) and the size distribution of gaps. The typical application of this technique makes assumptions about the shape of the gaps. Potential errors associated with these assumptions were quantified. To measure the gap regime in an old-growth, subalpine spruce-fir forest, regression equations were used to describe empirically gap area and perimeter. Most gaps in the spruce-fir forest were shaped like nonconvex polygons. Mapped gap areas were 22% less than estimates based on an elliptical model of gap shape and 22% more than area estimates based on a rhomboidal model of gap shape. An LIS method was developed that works for nonconvex shapes and was used to assess gap fraction in a subalpine, spruce-fir forest. The LIS approach for irregularly shaped gaps provided an estimate of gap fraction that was significantly smaller (35%) than the one based on an elliptical model of gap shape. The modifications in the application of LIS to the study of gap regimes seemed to preserve the efficiency and power of LIS while improving the accuracy of the results. For. Sci. 42(2):131-138.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Disturbance regime; gap geometry; spruce-fir forest; subalpine

Document Type: Journal Article

Affiliations: Department of Natural Resources, Cornell University, Ithaca, NY 14853

Publication date: 1996-05-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Podcasts
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more