January 28, 2010 by Mari-Vaughn Johnson Ph.D., USDA-ARS Temple, Texas
The fraction of photosynthetically active radiation that a canopy intercepts (fiPAR) drives photosynthesis. Authors rarely adequately describe how they deploy linear PAR sensors to quantify fiPAR. This virtual seminar with guest speaker Dr. Mari-Vaughn Johnson explores the need to adopt a universally accepted, repeatable sensor deployment method to produce consistent results. Dr. Johnson will show variability of fiPAR measurements by three sensor deployment methods, including two single plant methods and a transect method. She will also highlight potential implications of using the different deployment methods via an exercise in the application of the simple Lambert-Beers Law. If you are interested in canopy measurements of intercepted PAR, join us for this free virtual seminar.
Mari-Vaughn Johnson is an agronomist at the Grassland, Soil, and Water Research Laboratory at the USDA-ARS in Temple, Texas. Her work is in biofuel production systems, both annual and perennial grasses. Mari's goal is to produce a sustainable, multi-functional system that meets ecological and economic needs. She attended Tufts University for a Bachelors in Biology, Ohio University for an Master's in Environmental and Plant Biology and a Ph.D. in Wildlife.
Do you have more questions about measureing PAR and using ceptometers? Then visit our forms to post questions, read answers to frequently asked questions, and receive answers to your questions from Decagon scientists as well as other users. You can also call Decagon directly at 1-800-755-2751 to talk to one of our researchers.
Or, you can learn more about Decagon's ceptometer, the AccuPAR LP-80, by visiting the LP-80 product page.