Journal
ENVIRONMENTAL POLLUTION
Volume 173, Issue -, Pages 29-37Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.10.003
Keywords
Passive fluorescence; Red/far-red ratio; Stress monitoring; Urban environment; Particulate matter; Remote sensing
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Funding
- Belgian Science Policy Office (BELSPO) in the frame of the STEREO II program-project BIOHYPE [SR/00/131]
- Spanish Ministry for Science and Innovation [AYA 2010-21432-C02-01]
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Passive steady-state chlorophyll fluorescence (Fs) provides a direct diagnosis of the functional status of vegetation photosynthesis. With the prospect of mapping Fs using remote sensing techniques, field measurements are mandatory to understand to which extent Fs allows detecting plant stress in different environments. Trees of four common species in Valencia were classified in either a low or a high local traffic exposure class based on their leaf magnetic value. Upward and downward hyperspectral fluorescence yield (FY) and indices based on the two Fs peaks (at 687 and 741 nm) were calculated. FY indices of P. canariensis and P. x acerifolia were significantly different between the two traffic exposure classes defined, but not for C australis nor M. alba. While chlorophyll content could not indicate the difference between low and high traffic exposure, the FY(687)/FY(741) peak ratio increased significantly (p < 0.05) for both leaf sides for the higher traffic exposure class. (C) 2012 Elsevier Ltd. All rights reserved.
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