You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Phylogenetic Patterns among Tropical Flowering Phenologies
S. Joseph Wright and Osvaldo Calderon
Journal of Ecology
Vol. 83, No. 6 (Dec., 1995), pp. 937-948
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2261176
Page Count: 12
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
1 The ability of phylogenetic, water stress and `shared-pollinator' hypotheses to explain flowering times was tested for the flora of Barro Colorado Island, Panama. Both quantitative (217 species) and qualitative (1173 species) flowering data were used. 2 Descriptive metrics calculated from quantitative flowering data indicated that mean flowering times fell in the final two months of the dry season and the first two months of the wet season for 56% of species and that flowering was concentrated in a short, predictable part of the year for the great majority of species. 3 The `shared-pollinator' hypothesis predicted that congeners should have temporally segregated flowering times. This hypothesis was rejected for 57 of 59 genera. 4 The water stress hypothesis predicted that species from drier habitats and life forms with limited access to soil water should flower in the wet season. This hypothesis was also rejected. 5 There were, however, strong phylogenetic patterns. Both the mean and the variance of flowering times were similar among congeners. The variance of flowering times was also similar among confamilials, and mean flowering times were concentrated in the wet season for monocotyledons.
Journal of Ecology © 1995 British Ecological Society