Urban trees PSII Photochemical Efficiency


The aim of this project is to extend the use of Chl a fluorescence, mapping PSII photochemical quantum yield in urban trees. We mainly use Artificial Neural Networks for classifying the observed data.


Plant Type (Multiple Choice with images)
Plant Height (Multiple Choice)
Optional: Genus and Species (lowercase) (Short Answer)
Leaf Condition (Multiple Choice with images)
Optional: Disease or Pest Name (Short Answer)
Leaf Location (Multiple Choice)
Leaf Image (Take a Picture)
Leaf Number (Use Auto Increment) (Multiple Choice)


Leaf Photosynthesis MultispeQ V1.0


Measures many photosynthesis-related parameters in <15 seconds, including:

  • Chlorophll Fluorescence: Phi2, PhiNPQ, PhiNO, NPQt, qL, LEF
  • Relative Chlorophyll: SPAD
  • Proton Motive Force: ECSt, vH+, gH+
  • Absorbance at: 450, 535, 605, 650, 730, 850, 880, and 940nm.
  • Leaf Thickness (in mm), angle, and cardinal direct...


  1. What is the PSII quantum efficiency variation in urban trees around the world? (Short Answer)
  2. Is the Chl fluorescence a reliable tool to mapping urban tree diversity? (Short Answer)


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