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Variability of sun-induced chlorophyll fluorescence according to stand age-related processes in a managed loblolly pine forest.
Colombo, Roberto; Celesti, Marco; Bianchi, Remo; Campbell, Petya K E; Cogliati, Sergio; Cook, Bruce D; Corp, Lawrence A; Damm, Alexander; Domec, Jean-Christophe; Guanter, Luis; Julitta, Tommaso; Middleton, Elizabeth M; Noormets, Asko; Panigada, Cinzia; Pinto, Francisco; Rascher, Uwe; Rossini, Micol; Schickling, Anke.
Afiliación
  • Colombo R; Remote Sensing of Environmental Dynamics Laboratory, DISAT, University of Milano-Bicocca, Milan, Italy.
  • Celesti M; Remote Sensing of Environmental Dynamics Laboratory, DISAT, University of Milano-Bicocca, Milan, Italy.
  • Bianchi R; ESA-ESRIN Earth Observations, Frascati, Italy.
  • Campbell PKE; Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, USA.
  • Cogliati S; Remote Sensing of Environmental Dynamics Laboratory, DISAT, University of Milano-Bicocca, Milan, Italy.
  • Cook BD; Biospheric Sciences Laboratory, NASA/GSFC, Greenbelt, MD, USA.
  • Corp LA; Science Systems & Applications Inc., Lanham, MD, USA.
  • Damm A; Remote Sensing Laboratories, University of Zurich, Zurich, Switzerland.
  • Domec JC; Department of Surface Waters - Research and Management, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
  • Guanter L; Bordeaux Sciences Agro, UMR 1391 INRA-ISPA, Gradignan Cedex, France.
  • Julitta T; Nicholas School of the Environment, Duke University, Durham, NC, USA.
  • Middleton EM; Helmholtz Centre Potsdam, German Research Center for Geosciences (GFZ), Potsdam, Germany.
  • Noormets A; Remote Sensing of Environmental Dynamics Laboratory, DISAT, University of Milano-Bicocca, Milan, Italy.
  • Panigada C; Biospheric Sciences Laboratory, NASA/GSFC, Greenbelt, MD, USA.
  • Pinto F; Department of Forestry & Environmental Resources, North Carolina State University, Raleigh, NC, USA.
  • Rascher U; Remote Sensing of Environmental Dynamics Laboratory, DISAT, University of Milano-Bicocca, Milan, Italy.
  • Rossini M; Institute of Bio and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich GmbH, Jülich, Germany.
  • Schickling A; Global Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), Mexico City, Mexico.
Glob Chang Biol ; 24(7): 2980-2996, 2018 07.
Article en En | MEDLINE | ID: mdl-29460467
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Bosques / Clorofila / Hojas de la Planta / Pinus taeda País/Región como asunto: America do norte Idioma: En Revista: Glob Chang Biol Año: 2018 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Bosques / Clorofila / Hojas de la Planta / Pinus taeda País/Región como asunto: America do norte Idioma: En Revista: Glob Chang Biol Año: 2018 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Reino Unido