New Zealand Journal of Ecology (1995) 19(2): 213- 217

Uses and limitations of hemispherical photography for estimating forest light environments

Research Article
Jason R. Roxburgh 1,2
Dave Kelly 1,*
  1. Plant and Microbial Sciences, University of Canterbury, Private Bag, Christchurch 1, New Zealand
  2. Present address: Department of Conservation, Waikato Conservancy, Private Bag 3072, Hamilton, New Zealand
*  Corresponding author

We compare hemispherical (fisheye) photography and direct measurement using dataloggers for quantifying light intensity (photon flux density) in a New Zealand forest remnant. The hemispherical method was generally accurate, and faster than using dataloggers, but deviated from measured light intensity at low light levels (<20% of full sunlight). For deeply shaded sites, diazo-paper chemical light meters may be more suitable.