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Impacts of Stem Harvesting on Populations of Iriartea deltoidea (Palmae) in an Extractive Reserve in Acre, Brazil
Vol. 25, No. 1 (Mar., 1993), pp. 2-14
Published by: Association for Tropical Biology and Conservation
Stable URL: http://www.jstor.org/stable/2388974
Page Count: 13
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Population projection matrices were used to explore the population stability of Iriartea deltoidea in an extractive reserve in Acre, Brazil. Palm population structure at 5 sites was described using height class distributions; projections were based on survival probability estimates derived from the size class distributions, growth rates calculated from leaf production rates and leaf scar records, and fecundity estimates obtained from seedling densities. Matrix analyses suggested all 5 populations were stable under recent (1989) harvesting intensities; the dominant latent roots (λ) of the five transition matrices ranged from 0.989 to 1.017 Elasticity analyses indicated that population stability was most sensitive to changes in survival probabilities of palms 10-15 m tall. Lambda values were relatively insensitive to changes in fecundity and growth.
Biotropica © 1993 Association for Tropical Biology and Conservation