Diurnal Changes in Leaf Photochemical Reflectance Index in Two Evergreen Forest Canopies

Matti Mõttus, Luiz Aragão, Jaana Bäck, Rocío Hernandez Clemente, Eduardo Eiji Maeda, Vincent Robert Leon Markiet, Caroline Nichol, Raimundo Cosme Oliveira, Natalia Restrepo-Coupe

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

The spectral properties of plant leaves relate to the state of their photosynthetic apparatus and the surrounding environment. An example is the well known photosynthetic downregulation, active on the time scale from minutes to hours, caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the photochemical reflectance index (PRI). This index can be used to remotely monitor the photosynthetic status of vegetation, and allows for a global satellite-based measurement of photosynthesis. Such earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and upscale them temporally, we measured the daily course of leaf PRI in two evergreen biomes—a European boreal forest and an Amazon rainforest. The daily course of PRI was different for the two locations: At the Amazonian forest, the PRI of Manilkara elata leaves was correlated with the average photosynthetic photon flux density (PPFD) ( R2=0.59 ) of the 40 minutes preceding the leaf measurement. In the boreal location, the variations in Pinus sylvestris needle PRI were only weakly ( R2=0.27) correlated with mean PPFD of the preceding two hours; for Betula pendula, the correlation was insignificant regardless of the averaging period. The measured daily PRI curves were specific to species and/or environmental conditions. Hence, for a proper interpretation of satellite-measured instantaneous photosynthesis, the scaling of PRI measurements should be supported with information on its correlation with PPFD.
Alkuperäiskielienglanti
LehtiIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Vuosikerta12
Numero7
Sivut2236-2243
Sivumäärä8
ISSN1939-1404
DOI - pysyväislinkit
TilaJulkaistu - heinäkuuta 2019
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 1172 Ympäristötiede
  • 4112 Metsätiede

Lainaa tätä

Mõttus, Matti ; Aragão, Luiz ; Bäck, Jaana ; Clemente, Rocío Hernandez ; Maeda, Eduardo Eiji ; Markiet, Vincent Robert Leon ; Nichol, Caroline ; Oliveira, Raimundo Cosme ; Restrepo-Coupe, Natalia. / Diurnal Changes in Leaf Photochemical Reflectance Index in Two Evergreen Forest Canopies. Julkaisussa: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 2019 ; Vuosikerta 12, Nro 7. Sivut 2236-2243.
@article{49cee5df7d7b48f9a81a1f3547ff8f7e,
title = "Diurnal Changes in Leaf Photochemical Reflectance Index in Two Evergreen Forest Canopies",
abstract = "The spectral properties of plant leaves relate to the state of their photosynthetic apparatus and the surrounding environment. An example is the well known photosynthetic downregulation, active on the time scale from minutes to hours, caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the photochemical reflectance index (PRI). This index can be used to remotely monitor the photosynthetic status of vegetation, and allows for a global satellite-based measurement of photosynthesis. Such earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and upscale them temporally, we measured the daily course of leaf PRI in two evergreen biomes—a European boreal forest and an Amazon rainforest. The daily course of PRI was different for the two locations: At the Amazonian forest, the PRI of Manilkara elata leaves was correlated with the average photosynthetic photon flux density (PPFD) ( R2=0.59 ) of the 40 minutes preceding the leaf measurement. In the boreal location, the variations in Pinus sylvestris needle PRI were only weakly ( R2=0.27) correlated with mean PPFD of the preceding two hours; for Betula pendula, the correlation was insignificant regardless of the averaging period. The measured daily PRI curves were specific to species and/or environmental conditions. Hence, for a proper interpretation of satellite-measured instantaneous photosynthesis, the scaling of PRI measurements should be supported with information on its correlation with PPFD.",
keywords = "1172 Environmental sciences, 4112 Forestry, Amazon rainforest, Betula pendula, boreal forest, light use efficiency, Manilkara elata, photochemical reflectance index (PRI), Pinus sylvestris, MULTIPLE DRIVERS, PRI IMPLICATIONS, SEASONAL-CHANGE, PHOTOSYNTHESIS, FLUORESCENCE, ECOSYSTEMS, EFFICIENCY, PHENOLOGY, CYCLE",
author = "Matti M{\~o}ttus and Luiz Arag{\~a}o and Jaana B{\"a}ck and Clemente, {Roc{\'i}o Hernandez} and Maeda, {Eduardo Eiji} and Markiet, {Vincent Robert Leon} and Caroline Nichol and Oliveira, {Raimundo Cosme} and Natalia Restrepo-Coupe",
year = "2019",
month = "7",
doi = "10.1109/JSTARS.2019.2891789",
language = "English",
volume = "12",
pages = "2236--2243",
journal = "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing",
issn = "1939-1404",
publisher = "IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC",
number = "7",

}

Diurnal Changes in Leaf Photochemical Reflectance Index in Two Evergreen Forest Canopies. / Mõttus, Matti; Aragão, Luiz; Bäck, Jaana; Clemente, Rocío Hernandez; Maeda, Eduardo Eiji; Markiet, Vincent Robert Leon; Nichol, Caroline; Oliveira, Raimundo Cosme; Restrepo-Coupe, Natalia.

julkaisussa: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vuosikerta 12, Nro 7, 07.2019, s. 2236-2243.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Diurnal Changes in Leaf Photochemical Reflectance Index in Two Evergreen Forest Canopies

AU - Mõttus, Matti

AU - Aragão, Luiz

AU - Bäck, Jaana

AU - Clemente, Rocío Hernandez

AU - Maeda, Eduardo Eiji

AU - Markiet, Vincent Robert Leon

AU - Nichol, Caroline

AU - Oliveira, Raimundo Cosme

AU - Restrepo-Coupe, Natalia

PY - 2019/7

Y1 - 2019/7

N2 - The spectral properties of plant leaves relate to the state of their photosynthetic apparatus and the surrounding environment. An example is the well known photosynthetic downregulation, active on the time scale from minutes to hours, caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the photochemical reflectance index (PRI). This index can be used to remotely monitor the photosynthetic status of vegetation, and allows for a global satellite-based measurement of photosynthesis. Such earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and upscale them temporally, we measured the daily course of leaf PRI in two evergreen biomes—a European boreal forest and an Amazon rainforest. The daily course of PRI was different for the two locations: At the Amazonian forest, the PRI of Manilkara elata leaves was correlated with the average photosynthetic photon flux density (PPFD) ( R2=0.59 ) of the 40 minutes preceding the leaf measurement. In the boreal location, the variations in Pinus sylvestris needle PRI were only weakly ( R2=0.27) correlated with mean PPFD of the preceding two hours; for Betula pendula, the correlation was insignificant regardless of the averaging period. The measured daily PRI curves were specific to species and/or environmental conditions. Hence, for a proper interpretation of satellite-measured instantaneous photosynthesis, the scaling of PRI measurements should be supported with information on its correlation with PPFD.

AB - The spectral properties of plant leaves relate to the state of their photosynthetic apparatus and the surrounding environment. An example is the well known photosynthetic downregulation, active on the time scale from minutes to hours, caused by reversible changes in the xanthophyll cycle pigments. These changes affect leaf spectral absorption and are frequently quantified using the photochemical reflectance index (PRI). This index can be used to remotely monitor the photosynthetic status of vegetation, and allows for a global satellite-based measurement of photosynthesis. Such earth observation satellites in near-polar orbits usually cover the same geographical location at the same local solar time at regular intervals. To facilitate the interpretation of these instantaneous remote PRI measurements and upscale them temporally, we measured the daily course of leaf PRI in two evergreen biomes—a European boreal forest and an Amazon rainforest. The daily course of PRI was different for the two locations: At the Amazonian forest, the PRI of Manilkara elata leaves was correlated with the average photosynthetic photon flux density (PPFD) ( R2=0.59 ) of the 40 minutes preceding the leaf measurement. In the boreal location, the variations in Pinus sylvestris needle PRI were only weakly ( R2=0.27) correlated with mean PPFD of the preceding two hours; for Betula pendula, the correlation was insignificant regardless of the averaging period. The measured daily PRI curves were specific to species and/or environmental conditions. Hence, for a proper interpretation of satellite-measured instantaneous photosynthesis, the scaling of PRI measurements should be supported with information on its correlation with PPFD.

KW - 1172 Environmental sciences

KW - 4112 Forestry

KW - Amazon rainforest

KW - Betula pendula

KW - boreal forest

KW - light use efficiency

KW - Manilkara elata

KW - photochemical reflectance index (PRI)

KW - Pinus sylvestris

KW - MULTIPLE DRIVERS

KW - PRI IMPLICATIONS

KW - SEASONAL-CHANGE

KW - PHOTOSYNTHESIS

KW - FLUORESCENCE

KW - ECOSYSTEMS

KW - EFFICIENCY

KW - PHENOLOGY

KW - CYCLE

U2 - 10.1109/JSTARS.2019.2891789

DO - 10.1109/JSTARS.2019.2891789

M3 - Article

VL - 12

SP - 2236

EP - 2243

JO - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

JF - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

SN - 1939-1404

IS - 7

ER -