Forest canopy structure analyzed by using aerial photographs

Toru Nakashizuka, Toshio Katsuki, Hiroshi Tanaka

    Research output: Contribution to journalArticlepeer-review

    45 Citations (Scopus)

    Abstract

    A method was developed using aerial photographs to analyze forest canopy structure. Digital elevation models of both the land and canopy surface in a mesh of 5 m intervals were made from aerial photographs taken in winter (without tree leaves) and summer (with leaves), respectively, in a 60 ha area of temperate deciduous forest. The difference between the two elevation values at each point was regarded as the canopy height, and a canopy height profile was constructed. The estimated canopy structure was compared with that obtained by ground observations in a 6 ha part of the study area. Large gaps (>100 m2) were adequately detected by the method, and the gap size distribution obtained was similar to the one observed on the ground. The method was found to be effective in analyzing the forest canopy structure of large areas, but it is not suitable for the detection of small gaps.

    Original languageEnglish
    Pages (from-to)13-18
    Number of pages6
    JournalEcological Research
    Volume10
    Issue number1
    DOIs
    Publication statusPublished - 1995 Apr 1

    Keywords

    • Ogawa Forest Reserve
    • aerial photography
    • canopy gap
    • canopy structure
    • digital elevation data
    • vegetation height profile

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics

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