Keywords
Bromeliaceae
Tillandsia brachycaulos
matrix models
demography of Tillandsia
How to Cite
Abstract
Population dynamics of the epiphytic bromeliad, Tillandsia brachycaulos, was followed for a year (October 1996 to October 1997) in a low-statured tropical deciduous forest in the Yucatan Peninsula, Mexico. Nine hundred and twenty individuals of this species, located on nine trees of Gymnopodium floribundum (Polygonaceae), were tagged. The individuals were classified into two major groups according to their origin: seed or vegetative propagation. Each group was subdivided with regard to height. Bimonthly demography censuses were carried out, where growth, survival, and fecundity were reported for each individual. Results indicate that most of the individuals arise from vegetative propagation (66%), highest mortality value was found in the seedling stage (71%), highest fecundity in the adult 3 stage (2.05 seedlings/individual), whereas the highest production of offshoots is presented by the adult 3 offshoot stage (1.13 offshoots/individual). A Lefkovitch matrix model was used to estimate the population finite rate of growth (λ), that resulted in a value of 0.91.
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