Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1-9 |
| Number of pages | 9 |
| Journal | Ecological Informatics |
| Volume | 25 |
| DOIs | |
| Publication status | Published - 2015 |
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Keywords
- Biomass estimation
- Digital camera
- Digital repeat photography
- Phenological observations
- RGB
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Ecology
- Computer Science Applications
- Computational Theory and Mathematics
- Applied Mathematics
- Modelling and Simulation
- Ecological Modelling
Cite this
Utilization of ground-based digital photography for the evaluation of seasonal changes in the aboveground green biomass and foliage phenology in a grassland ecosystem. / Inoue, Tomoharu; Nagai, Shin; Kobayashi, Hideki; Koizumi, Hiroshi.
In: Ecological Informatics, Vol. 25, 2015, p. 1-9.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Utilization of ground-based digital photography for the evaluation of seasonal changes in the aboveground green biomass and foliage phenology in a grassland ecosystem
AU - Inoue, Tomoharu
AU - Nagai, Shin
AU - Kobayashi, Hideki
AU - Koizumi, Hiroshi
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
KW - Biomass estimation
KW - Digital camera
KW - Digital repeat photography
KW - Phenological observations
KW - RGB
UR - http://www.scopus.com/inward/record.url?scp=84908689234&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908689234&partnerID=8YFLogxK
U2 - 10.1016/j.ecoinf.2014.09.013
DO - 10.1016/j.ecoinf.2014.09.013
M3 - Article
AN - SCOPUS:84908689234
VL - 25
SP - 1
EP - 9
JO - Ecological Informatics
JF - Ecological Informatics
SN - 1574-9541
ER -