Effects of environmental conditions associated to the cardinal orientation on the reproductive phenology of the cerrado savanna tree Xylopia aromatica (Annonaceae)

Anais da Academia Brasileira de Ciências

Maria Gabriela G. Camargo¹  Regina M. Souza¹  Paula Reys¹  Leonor P.c. Morellato¹ 

[1] ,Universidade Estadual Paulista Instituto de Biociências Departamento de BotânicaRio Claro SP ,Brasil

关键词: cerrado savanna;    edge effect;    fragmentation;    reproductive phenology;    synchrony;    cerrado;    efeito de borda;    fragmentação;    fenologia reprodutiva;    sincronia;   

DOI  :  10.1590/S0001-37652011005000014

来源: SciELO

【 摘 要 】

The Brazilian cerrado has undergone an intense process of fragmentation, which leads to an increase in the number of remnants exposed to edge effects and associated changes on environmental conditions that may affect the phenology of plants. This study aimed to verify whether the reproductive phenology of Xylopia aromatica (Lam.) Mart. (Annonaceae) differs under different light conditions in a cerrado sensu stricto (a woody savanna) of southeastern Brazil. We compared the reproductive phenology of X. aromatica trees distributed on east and south cardinal faces of the cerrado during monthly observations, from January 2005 to December 2008. The east face had a higher light incidence, higher temperatures and canopy openness in relation to south face. X. aromatica showed seasonal reproduction at both faces of the cerrado, but the percentage of individuals, the synchrony and duration of phenophases were higher at the east face. The study demonstrated the influence of the environmental conditions associated to the cardinal orientation of the cerrado faces on the phenological pattern of X. aromatica. Similar responses may be observed for other species, ultimately affecting patterns of floral visitation and fruit production, which reinforces the importance of considering the cardinal direction in studies of edge effects and fragmentation.

【 授权许可】

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