Articles | Volume 12, issue 13
https://doi.org/10.5194/bg-12-4149-2015
https://doi.org/10.5194/bg-12-4149-2015
Research article
 | 
14 Jul 2015
Research article |  | 14 Jul 2015

Monitoring seasonal and diurnal changes in photosynthetic pigments with automated PRI and NDVI sensors

J. A. Gamon, O. Kovalchuck, C. Y. S. Wong, A. Harris, and S. R. Garrity

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Short summary
NDVI and PRI sensors (SRS, Decagon Inc.) exhibited complementary responses during spring photosynthetic activation in evergreen and deciduous stands. In evergreens, PRI was most strongly influenced by changing chlorophyll:carotenoid pool sizes over the several weeks of the study, while it was most affected by xanthophyll cycle pigment activity at the diurnal timescale. These automated PRI and NDVI sensors offer new ways to explore environmental and physiological constraints on photosynthesis.
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