Level of Chlorophyll in Native vs. Non Native Trees


How do the levels of chlorophyll compare between native and non native trees from September to November? We are studying the difference in levels of chlorophyll in Ulmus "Morton" Glossy and Ginko. Data is randomly selected by choosing leaves without looking in each quadrant.


The research team used a multispeQ device. The multispeQ device measured light intensity and quality, temperature, humidity, leaf pigmentation (e.g., chlorophyll) and various photosynthetic parameters based on static or light-driven fluorescence yield and absorbance changes (Austic et. al., 2016). The research team sampled randomly by choosing 5 leaves in each quadrant (North, South, East, and West). The sample was selected based on close-eye sampling method to collected data. Each time data was collected, the research team took 100 samples from three trees of each species, Ulmus ‘Morton Glossy’ and Gingko biloba. The Ulmus ‘Morton Glossy’ located in the northern part of Michigan State campus between Natural Sciences building and Giltner hall. The Gingko biloba located in the northern part of Michigan State University’s campus on the east side of South Kedzie. All three trees of Ulmus ‘Morton Glossy’ were 8 years old and all three trees of Gingko biloba were 20 years old. To analyze this data, the research group used a t-test to compare the phi II and PQ SPAD for both Ulmus ‘Morton Glossy’ and Gingko biloba.


Leaf Photosynthesis - MultispeQ Beta ONLY

Measures photosynthesis-related parameters in <15 seconds, including: Phi2, PhiNPQ, PhiNO, NPQt, qL, LEF, and SPAD. In addition, measures PAR (photosynthetically active radiation), ambient temperature and relative humidity.

Works with the MultispeQ Beta device only


  1. What is the tree code? (Multiple Choice)
  2. Which quadrant sampled? (Multiple Choice)
  3. Leaf Color was? (Multiple Choice)
  4. Randomly selected leaf # per quadrant (Multiple Choice)



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