Do vegetative and reproductive phenophases of deciduous tropical species respond similarly to rainfall pulses?

作     者：A.P.Silveira F.S.Araújo F.R.Martins 

作者机构：Itapipoca Faculty of EducationAv.Monsenhor Tabosa s/ no.Ceará State University -- UECE Graduate Course of Ecology and Natural ResourcesDepartment of BiologyBuilding 906Federal University of Ceará-UFC Department of Plant BiologyInstitute of BiologyP.O.Box 610University of Campinas – UNICAMP 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2013年第24卷第4期

页      面：643-651页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by Fundacāo Cearense de Apoio ao Desenvolvimento Científicoe Tecnológico (FUNCAP) (093.01.00/09) National Council for Scientific and Technological Development(CNPq),Brazil 

主　　题：asynchrony circular analysis deciduous phenology riskspreading seasonality. 

摘      要：Deciduous trees with high-density wood that occur in dry seasonal tropical regions respond to rainfall seasonality with synchrony in phenophases. However, they may exhibit interannual differences in synchrony and intensity of phenophases, as strategy for large variations in duration and intensity of rainfall pulses. Nevertheless, it remains unknown how phenophases of deciduous trees of the Brazilian semi-arid region respond to rainfall variations. The phenology of Cordia oncocalyx was monitored in deciduous thorny woodland （Caatinga）, from April 2009 to March 2011, and was correlated with rainfall, soil humidity, temperature, and photoperiod. The rainy years 2009 and 2011 exhibited higher duration of rainfall pulses and lower frequency of interpulses, but in 2010 pulse duration and total rainfall were lower. Circular statistics showed leaf flush followed by flowering and fruiting in the rainy season, and leaf fall and seed dispersal in the dry season.