Canopy dynamics and light climates in a tropical moist deciduous forest in India
- 1 February 1989
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Tropical Ecology
- Vol. 5 (1), 65-79
- https://doi.org/10.1017/s0266467400003229
Abstract
The canopy dynamics and light climates within a 20 by 60 m quadrat were studied in a disturbed moist deciduous forest near Bombay, India. A map was drawn of individual trees within the quadrat, the taxa were identified, and their phenology was followed from November 1984 to July 1985. The quadrat contained 14 species, the most common being Tectona grandis, Terminalia tomentosa, Butea monosperma, Mitragyne parviflora and Albizia procera. Some individuals were in leaf at all times, more so at the moister east end of the quadrat. In November at the end of the rainy season, light measurements documented percentages of total daily photosynthetic photon fluence (PPF) at 10.0% of full sunlight; 44% of this flux was due to sun-flecks whose duration was approximately 17% of the daytime hours. Values for six sites were similar to mid-day measurements along a 40 m transect, and consistent with the 94% canopy cover of the sites, photographed with a fish-eye lens. The March dry season measurements revealed a more intense radiation environment (54% of solar PPF), and 59% of the photosynthetic photon flux density at mid-day along the transect. Canopy openings were increased to a mean of 59.4%. Light in the understorey in November was spectrally altered, with typical R:FR ratios of 0.30, compared to March values identical to those of sunlight, at 1.10.Keywords
This publication has 16 references indexed in Scilit:
- Simulating forest shade to study the developmental ecology of tropical plants: juvenile growth in three vines in IndiaJournal of Tropical Ecology, 1988
- The Spectral Distribution of Radiation in Two Neotropical RainforestsBiotropica, 1987
- Area projections of fisheye photographic lensesAgricultural and Forest Meteorology, 1987
- Seasonal and successional changes in light quality and quantity in the understory of boreal forest ecosystemsCanadian Journal of Botany, 1986
- Light Quality, Photoperception, and Plant StrategyAnnual Review of Plant Physiology, 1982
- The microclimate of a dry tropical forestAgricultural Meteorology, 1980
- Plant Reproductive Ecology of a Secondary Deciduous Tropical Forest in VenezuelaBiotropica, 1978
- THE FUNCTION OF PHYTOCHROME IN THE NATURAL ENVIRONMENT–V. SEASONAL CHANGES IN RADIANT ENERGY QUALITY IN WOODLANDSPhotochemistry and Photobiology, 1977
- The Distribution of Solar Radiation within a Deciduous ForestEcological Monographs, 1977
- Spatial and temporal distribution of solar radiation beneath forest canopiesAgricultural Meteorology, 1972