Journal of Forest Research

, Volume 10, Issue 3, pp 247–249 | Cite as

The applicability of a color acetate film for estimating photosynthetic photon flux density in a forest understory

SHORT COMMUNICATION

Abstract

The suitability of a color acetate film for estimating photosynthetic photon flux density (PPFD) in a forest understory was examined. The fading ratio of the film (F), the total PPFD (PPFDtotal) to which the film was exposed, and the average daily maximum temperature during exposure (T) were obtained from measurements at multiple sampling points throughout an entire year within a natural secondary forest (n = 42). The ranges of the recorded values were as follows: F 35%–99%, PPFDtotal 1.4–28.3 mol m−2, and T 6°–32°C. PPFDtotal was regressed by F and T with a high r2 (=0.94; P < 0.0001): PPFDtotal = (100 − F)/(1.085 + 0.051 T). The absolute error (|estimated PPFDtotal − measured PPFDtotal|) averaged 1.3 mol m−2 with a maximum of 5.7 mol m−2, indicating a good fit. These results indicated broad applicability of the film, both spatially and temporally, for estimating forest understory PPFD.

Key words

Color acetate film Light measurement PPFD Forest understory 

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Copyright information

© The Japanese Forest Society and Springer-Verlag Tokyo 2005

Authors and Affiliations

  1. 1.Laboratory of Forest Ecology, Graduate School of AgricultureKyoto UniversityKyotoJapan
  2. 2.Kansai Research CenterForestry and Forest Products Research InstituteKyotoJapan

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