Journal article
Photosynthetic light environments in a lowland tropical rain forest in Costa Rica
Journal of Ecology, Vol.72(2), pp.553-564
1984
Abstract
Daily total photosynthetic photo flux density (PPFD) in the understorey, 200 m2 gap, and 400 m2 gap were 1-1%, 9%, and 20-35% respectively, of PPFD in the clearing. Daily total PPFD in the 400 m2 gap during the dry season was, on average, 2.4 times greater than in the 200 m2 gap, and 20-25 times those in the understorey. In the 200m2 gap daily total PPFD was 9 times greater than in the understorey during the dry season. In the clearing, PPFD was significantly different between seasons with 24% higher PPFD during the dry season. In the 400 m2 gap and understorey, PPFD was not significantly different between seasons. In the clearing, a high proportion of 10-min averages were greater than 500 mu mol m-2s-1; in the 400 m2 gap, a high proportion of 10-min averagegs were between 100 mu mol m-2s-1 and 500 mu mol m-2s-1; in the understorey over 70% of the 10-min averages were below 10 mu mol m-2s-1. The clearing exhibited the greatest diurnal variation in PPFD and the least day-to-day variation, whereas the understorey exhibited the least diurnal variation and the greatest day-to-day variation in PPFD.-from Authors
Details
- Title
- Photosynthetic light environments in a lowland tropical rain forest in Costa Rica
- Authors
- Robin L Chazdon (Author) - University of Cornell, United StatesN Fetcher (Author) - Duke University, United States
- Publication details
- Journal of Ecology, Vol.72(2), pp.553-564
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Date published
- 1984
- DOI
- 10.2307/2260066
- ISSN
- 0022-0477
- Organisation Unit
- Tropical Forests and People Research Centre; University of the Sunshine Coast, Queensland; Forest Research Institute
- Language
- English
- Record Identifier
- 99451078802621
- Output Type
- Journal article
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