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Remote Sens. 2018, 10(7), 1086;

Assessing Ecosystem Isoprene Emissions by Hyperspectral Remote Sensing

Consejo Superior de Investigaciones Científicas (CSIC), Global Ecology Unit CREAF-CSIC-UAB, Bellaterra 08193, Catalonia, Spain
Centre de Recerca Ecològica i Aplicacions Forestals (CREAF), Cerdanyola del Vallès 08193, Catalonia, Spain
Center of Excellence PLECO, Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk B-2610, Belgium
Author to whom correspondence should be addressed.
Received: 10 June 2018 / Revised: 29 June 2018 / Accepted: 4 July 2018 / Published: 8 July 2018
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This study examined the relationship between foliar isoprene emissions, light use efficiency and photochemical reflectance index (PRI) throughout the canopy profile and explored the contribution of xanthophyll cycle pigments versus other carotenoid pigments to the isoprene/PRI relationship. Foliar isoprene emissions within the canopy profile were measured in a high-density poplar plantation in Flanders (Belgium) during the 2016 growing season. The results confirmed that PRI was a promising estimator of isoprene emissions at canopy level. Interestingly, xanthophyll cycle pigments contributed more to isoprene biosynthesis than chlorophyll and drove the isoprene/PRI relationship. The simple independent pigment index and novel defined indices, such as the hyperspectral isoprene index and simple hyperspectral isoprene index, showed promising results and could be suitable estimators of isoprene emissions due to their strong relationship with the xanthophyll pool. View Full-Text
Keywords: reflectance; pigment pools; xanthophyll; zeaxanthin; light use efficiency; photochemical reflectance index reflectance; pigment pools; xanthophyll; zeaxanthin; light use efficiency; photochemical reflectance index

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Balzarolo, M.; Peñuelas, J.; Filella, I.; Portillo-Estrada, M.; Ceulemans, R. Assessing Ecosystem Isoprene Emissions by Hyperspectral Remote Sensing. Remote Sens. 2018, 10, 1086.

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