globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14097
Scopus记录号: 2-s2.0-85044257844
论文题名:
Variability of sun-induced chlorophyll fluorescence according to stand age-related processes in a managed loblolly pine forest
作者: Colombo R.; Celesti M.; Bianchi R.; Campbell P.K.E.; Cogliati S.; Cook B.D.; Corp L.A.; Damm A.; Domec J.-C.; Guanter L.; Julitta T.; Middleton E.M.; Noormets A.; Panigada C.; Pinto F.; Rascher U.; Rossini M.; Schickling A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:7
起始页码: 2980
结束页码: 2996
语种: 英语
英文关键词: FLEX mission ; fluorescence normalization ; forest stand age ; HyPlant spectrometer ; loblolly pine ; Parker Tract forest ; red fluorescence yield ; sun-induced chlorophyll fluorescence
Scopus关键词: chlorophyll ; climate effect ; coniferous forest ; fluorescence ; future prospect ; photosynthesis ; remote sensing ; spatial resolution ; spatial variation ; stomatal conductance ; North Carolina ; United States ; Pinus taeda
英文摘要: 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. © 2018 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110359
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Remote Sensing of Environmental Dynamics Laboratory, DISAT, University of Milano-Bicocca, Milan, Italy; ESA-ESRIN Earth Observations, Frascati, Italy; Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, MD, United States; Biospheric Sciences Laboratory, NASA/GSFC, Greenbelt, MD, United States; Science Systems & Applications Inc., Lanham, MD, United States; Remote Sensing Laboratories, University of Zurich, Zurich, Switzerland; Department of Surface Waters - Research and Management, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland; Bordeaux Sciences Agro, UMR 1391 INRA-ISPA, Gradignan Cedex, France; Nicholas School of the Environment, Duke University, Durham, NC, United States; Helmholtz Centre Potsdam, German Research Center for Geosciences (GFZ), Potsdam, Germany; Department of Forestry & Environmental Resources, North Carolina State University, Raleigh, NC, United States; Institute of Bio and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich GmbH, Jülich, Germany; Global Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), Mexico City, Mexico

Recommended Citation:
Colombo R.,Celesti M.,Bianchi R.,et al. Variability of sun-induced chlorophyll fluorescence according to stand age-related processes in a managed loblolly pine forest[J]. Global Change Biology,2018-01-01,24(7)
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