- Plant and Microbial Sciences, University of Canterbury, Private Bag, Christchurch 1, New Zealand
- Present address: Department of Conservation, Waikato Conservancy, Private Bag 3072, Hamilton, New Zealand
Abstract
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.