Irregular droughts trigger mass flowering in aseasonal tropical forests in asia
Open Access
- 1 August 2006
- journal article
- Published by Wiley in American Journal of Botany
- Vol. 93 (8), 1134-1139
- https://doi.org/10.3732/ajb.93.8.1134
Abstract
General flowering is a community-wide masting phenomenon, which is thus far documented only in aseasonal tropical forests in Asia. Although the canopy and emergent layers of forests in this region are dominated by species of a single family, Dipterocarpaceae, general flowering involves various plant groups. Studying proximate factors and estimating the flowering patterns of the past and future may aid our understanding of the ecological significance and evolutionary factors behind this phenomenon. Here we show that this phenomenon is most likely triggered by irregular droughts based on 10 years of observations. In the aseasonal forests of SE Asia, droughts tend to occur during transition periods from La Niña to El Niño, which results in an irregular 6–7-yr cycle involving a dry period with several droughts and a wet period without droughts. The magnitude of a flowering event also depends on the timing of droughts associated with the El Niño southern oscillation (ENSO) cycle, with the largest events occurring after an interval of several years with no flowering. Because most plant species can only reproduce successfully during large flowering events, changes in the ENSO cycle resulting from global warming, may have serious ramifications for forest regeneration in this region.Keywords
This publication has 36 references indexed in Scilit:
- How does Dryobalanops aromatica supply carbohydrate resources for reproduction in a masting year?Trees, 2005
- Photoperiodic induction of synchronous flowering near the EquatorNature, 2005
- Short-term drought causes synchronous leaf shedding and flushing in a lowland mixed dipterocarp forest, Sarawak, MalaysiaJournal of Tropical Ecology, 2004
- The impact of drought on the population dynamics of canopy-tree seedlings in an aseasonal Malaysian rain forestJournal of Tropical Ecology, 2003
- VERTEBRATE RESPONSES TO SPATIOTEMPORAL VARIATION IN SEED PRODUCTION OF MAST-FRUITING DIPTEROCARPACEAEEcological Monographs, 2000
- How Does Masting Happen and Synchronize?Journal of Theoretical Biology, 1997
- The evolutionary ecology of mast seedingTrends in Ecology & Evolution, 1994
- Global and Regional Scale Precipitation Patterns Associated with the El Niño/Southern OscillationMonthly Weather Review, 1987
- General flowering in the climax rain forests of South-east AsiaJournal of Tropical Ecology, 1985
- Tropical Blackwater Rivers, Animals, and Mast Fruiting by the DipterocarpaceaeBiotropica, 1974