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Reproductive biology of two species of Kielmeyera (Guttiferae) in the cerrados of Central Brazil

Published online by Cambridge University Press:  10 July 2009

Paulo E. Oliveira  and
Jose C. S. Silva
Paulo E. Oliveira
Affiliation:
Departamento de Biociências, Universidade Federal de Uberlândia, 38400 – Uberlândia – MG, Brazil
Jose C. S. Silva
Affiliation:
EMBRAPA – CPACerrados
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Abstract

The reproductive process of two species of Kielmeyera, K. coriacea and K. speciosa, sympatric in savanna areas in central Brazil, has been studied. The trees have similar pollination systems and dispersal mechanisms but distinct phenological behaviours. Fast germination after the beginning of the wet season, early root swelling forming a xylopodium which enables survival during the dry season, and recurrent sprouting from the swollen root system during the first years of development were features of an establishment syndrome common to both species. The seedling survival after establishment was high; after five years 64% of the seedling cohort of K. coriacea was still alive. These seedlings, in natural conditions, remain poorly developed and resprout recurrently from the soil during some years. The recruitment of adult plants seems to occur from this ‘seedling bank’. The reproductive process was higher in K. coriacea during most stages of the reproductive process which may explain the smaller population size and distribution range of K. speciosa. For both species, the reproductive process as a whole was mainly affected by biotic factors in the wet season and not by seasonal drought or periodic fire.

Keywords

BrazilcerradodemographydispersalestablishmentKielmeyeraGuttiferaesavannasseedling survival
Type
Research Article
Information
Journal of Tropical Ecology , Volume 9 , Issue 1 , February 1993 , pp. 67 - 79
Copyright
Copyright © Cambridge University Press 1993

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