Mortality and recruitment of trees in a secondary montane rain forest in Southeastern Brazil

Brazilian Journal of Biology

E. P. C. Gomes²  W. Mantovani¹  P. Y. Kageyama¹ 

[1] ,Universidade de Taubaté Departamento de Biologia Taubaté SP ,Brazil

关键词: forest dynamics;    mortality;    recruitment;    rain forest;    ecological groups;    dinâmica florestal;    mortalidade;    recrutamento;    floresta pluvial;    grupos ecológicos;   

DOI  :  10.1590/S1519-69842003000100007

来源: SciELO

【 摘 要 】

Mortality and recruitment rates were obtained for tree species over a 5.6 year period in a 1-ha fragment of secondary montane rain forest in Southeastern Brazil. All plants with a diameter at breast height (dbh) > 8 cm were sampled in 1989-1990 and 1995. There was an increase from 90 to 96 species, and 669 ind./ha to 749 ind./ha over the period. The mortality rate of 1.67%/yr was similar to findings for other forests, while recruitment of 3.46%/yr was the highest rate reported. Both mortality and recruitment were significantly higher in the smaller dbh classes. Recruitment was higher among rare species, and the relatively slow-growing species had significantly higher mortality rates. Differences between species dynamics were marked. Species with high values of l were mainly early successional and understorey trees but some understorey species also suffered a marked population decline. The classification system of species in response to light which divides understorey species into "partial shade-bearers" and "shade-bearers" groups showed to be the most suitable to the obtained results. The results suggest that this forest is undergoing a process of recovery from past disturbance.

【 授权许可】

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