Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone
Figure 2
Midday relationships between light-saturated CO2 assimilation rate () and selected vegetation indices ((a): R686/R630, (b): PRI Physiological Reflectance Index, (R532 − R570)/(R532 + R570)) and (c): R740/R800 under saturating steady state light conditions (transparent dots); and the relative change of the vegetation indices (Δ) during the dynamic transition of plants form dark-to-light adapted state (dark dots). 24 leaves (of 6 different plant species) were measured and each dot represents the mean value of five measurements for and 8–10 measurements (pixels) for the reflectance indices per one leaf. Error bars represent standard deviations. NS means nonsignificant relationship.
