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

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

doi:10.5194/bg-12-4149-2015

Articles | Volume 12, issue 13

https://doi.org/10.5194/bg-12-4149-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

EUROSPEC – spectral sampling tools for vegetation biophysical...

https://doi.org/10.5194/bg-12-4149-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 12, issue 13

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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Mar 2015	29	65	4	98
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May 2015	30	27	0	57
Jun 2015	23	18	2	43
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Latest update: 08 Nov 2025

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.