Utilization of ground-based digital photography for the evaluation of seasonal changes in the aboveground green biomass and foliage phenology in a grassland ecosystem

Tomoharu Inoue*, Shin Nagai, Hideki Kobayashi, Hiroshi Koizumi

*この研究の対応する著者

    研究成果: Article査読

    38 被引用数 (Scopus)

    抄録

    We investigated the usefulness of a ground-based digital photography to evaluate seasonal changes in the aboveground green biomass and foliage phenology in a short-grass grassland in Japan. For ground-truthing purposes, the ecological variables of aboveground green biomass and spectral reflectance of aboveground plant parts were also measured monthly. Seasonal change in a camera-based index (rG: ratio of green channel) reflected the characteristic events of the foliage phenology such as the leaf-flush and leaf senescence. In addition, the seasonal pattern of the rG was similar to that of the aboveground green biomass throughout the year. Moreover, there was a positive linear relationship between rG and aboveground green biomass (R2=0.81, p<0.05), as was the case with spectra-based vegetation indices. On the basis of these results, we conclude that continuous observation using digital cameras is a useful tool that is less labor intensive than conventional methods for estimating aboveground green biomass and monitoring foliage phenology in short-grass grasslands in Japan.

    本文言語English
    ページ(範囲)1-9
    ページ数9
    ジャーナルEcological Informatics
    25
    DOI
    出版ステータスPublished - 2015

    ASJC Scopus subject areas

    • 生態、進化、行動および分類学
    • 生態学
    • コンピュータ サイエンスの応用
    • 計算理論と計算数学
    • 応用数学
    • モデリングとシミュレーション
    • 生態モデリング

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