Differences in spectrum reflectance and physiological indices among three typical semi-natural grasslands in Japan

Hajime Tomimatsu, Shiro Itano

Research output: Contribution to journalArticlepeer-review

Abstract

To clarify the utility of spectrum reflection from plant canopy surfaces for distinguishing grassland vegetation, we tested a portable hyper-spectrometer in three typical Japanese semi-natural grasslands: Zoysia-dominated (. Z), Pleioblastus-dominated (. P), and mixed species types (. Mixed). We calculated the spectrum reflectance, its coefficient of variation (CV) and first derivative reflectance (FDR), and three physiological indices (PRI, photochemical reflectance index; CCI, canopy chlorophyll index; CI, chlorophyll index). The CV of waveform reflectance in the Mixed grassland tended to be higher than those in Z- and P-dominated grasslands. The values of PRI, CI and CCI differed among the three grasslands (. P [PRI = -0.027, CCI = 1.469, CI = 0.550] > Mixed [-0.031, 1.421, 0.459] > Z [-0.042, 1.297, 0.428]). Therefore, the CV may be used to distinguish grasslands dominated by a single species from those dominated by multiple species, while the physiological indices may be able to distinguish the grassland type by its dominant species.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalGrassland Science
Volume55
Issue number4
DOIs
Publication statusPublished - 2009 Dec 9
Externally publishedYes

Keywords

  • Grassland management
  • Hyper-spectral reflectance
  • Proximal sensing

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science
  • Plant Science

Fingerprint Dive into the research topics of 'Differences in spectrum reflectance and physiological indices among three typical semi-natural grasslands in Japan'. Together they form a unique fingerprint.

Cite this