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Comparison of Two Light Meters for Studies of Light Penetration into Herbaceous Leaf Canopies
Author(s) -
Fick Gary W.
Publication year - 1972
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1934246
Subject(s) - herbaceous plant , canopy , photoresistor , environmental science , ecology , remote sensing , atmospheric sciences , biology , materials science , geography , geology , optoelectronics
A cadmium sulfide photoresistor and a selenium photovoltaic cell were compared for measuring the relative light conditions within an herbaceous leaf canopy. Under the same conditions, differences between meters as high as 30% were found for the measured light environment. Canopy disturbance was considered the major cause of the differences. Unfortunately, sensor size and spectral response were confounding factors, but differences were significant and point out both the magnitude of possible differences and the importance of exercising caution in comparing readings taken with different meters.