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Variability of sun-induced chlorophyll fluorescence according to stand age-related processes in a managed loblolly pine forest

dc.contributor.author Colombo, Roberto
dc.contributor.author Celesti, Marco
dc.contributor.author Bianchi, Remo
dc.contributor.author Campbell, Petya KE
dc.contributor.author Cogliati, Sergio
dc.contributor.author Cook, Bruce D
dc.contributor.author Corp, Lawrence A
dc.contributor.author Damm, Alexander
dc.contributor.author Domec, Jean-Christophe
dc.contributor.author Guanter, Luis
dc.contributor.author Julitta, Tommaso
dc.contributor.author Middleton, Elizabeth M
dc.contributor.author Noormets, Asko
dc.contributor.author Panigada, Cinzia
dc.contributor.author Pinto, Francisco
dc.contributor.author Rascher, Uwe
dc.contributor.author Rossini, Micol
dc.contributor.author Schickling, Anke
dc.date.accessioned 2018-08-13T12:56:04Z
dc.date.available 2018-08-13T12:56:04Z
dc.date.issued 2018-07
dc.identifier.issn 1354-1013
dc.identifier.issn 1365-2486
dc.identifier.uri https://hdl.handle.net/10161/17325
dc.description.abstract © 2018 John Wiley & Sons Ltd Leaf fluorescence can be used to track plant development and stress, and is considered the most direct measurement of photosynthetic activity available from remote sensing techniques. Red and far-red sun-induced chlorophyll fluorescence (SIF) maps were generated from high spatial resolution images collected with the HyPlant airborne spectrometer over even-aged loblolly pine plantations in North Carolina (United States). Canopy fluorescence yield (i.e., the fluorescence flux normalized by the light absorbed) in the red and far-red peaks was computed. This quantifies the fluorescence emission efficiencies that are more directly linked to canopy function compared to SIF radiances. Fluorescence fluxes and yields were investigated in relation to tree age to infer new insights on the potential of those measurements in better describing ecosystem processes. The results showed that red fluorescence yield varies with stand age. Young stands exhibited a nearly twofold higher red fluorescence yield than mature forest plantations, while the far-red fluorescence yield remained constant. We interpreted this finding in a context of photosynthetic stomatal limitation in aging loblolly pine stands. Current and future satellite missions provide global datasets of SIF at coarse spatial resolution, resulting in intrapixel mixture effects, which could be a confounding factor for fluorescence signal interpretation. To mitigate this effect, we propose a surrogate of the fluorescence yield, namely the Canopy Cover Fluorescence Index (CCFI) that accounts for the spatial variability in canopy structure by exploiting the vegetation fractional cover. It was found that spatial aggregation tended to mask the effective relationships, while the CCFI was still able to maintain this link. This study is a first attempt in interpreting the fluorescence variability in aging forest stands and it may open new perspectives in understanding long-term forest dynamics in response to future climatic conditions from remote sensing of SIF.
dc.language English
dc.publisher Wiley
dc.relation.ispartof Global Change Biology
dc.relation.isversionof 10.1111/gcb.14097
dc.subject Science & Technology
dc.subject Life Sciences & Biomedicine
dc.subject Biodiversity Conservation
dc.subject Ecology
dc.subject Environmental Sciences
dc.subject Biodiversity & Conservation
dc.subject Environmental Sciences & Ecology
dc.subject FLEX mission
dc.subject fluorescence normalization
dc.subject forest stand age
dc.subject HyPlant spectrometer
dc.subject loblolly pine
dc.subject Parker Tract forest
dc.subject red fluorescence yield
dc.subject sun-induced chlorophyll fluorescence
dc.subject GROSS PRIMARY PRODUCTION
dc.subject PHOTOCHEMICAL REFLECTANCE INDEX
dc.subject ECOSYSTEM CARBON EXCHANGE
dc.subject LEAF-AREA INDEX
dc.subject SATELLITE DATA
dc.subject WATER-STRESS
dc.subject PHOTOSYNTHETIC CAPACITY
dc.subject HYPERSPECTRAL IMAGERY
dc.subject STOMATAL CONDUCTANCE
dc.subject HYDRAULIC LIMITATION
dc.title Variability of sun-induced chlorophyll fluorescence according to stand age-related processes in a managed loblolly pine forest
dc.type Journal article
duke.contributor.id Domec, Jean-Christophe|0417132
dc.date.updated 2018-08-13T12:56:00Z
pubs.begin-page 2980
pubs.end-page 2996
pubs.issue 7
pubs.organisational-group Nicholas School of the Environment
pubs.organisational-group Duke
pubs.organisational-group Environmental Sciences and Policy
pubs.publication-status Published
pubs.volume 24
duke.contributor.orcid Domec, Jean-Christophe|0000-0003-0478-2559


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