Natural regeneration dynamics of Mora paraensis (Ducke) Ducke in estuarine floodplain forests of the Amazon River.

• Autor(a) principal: MIRANDA, Z. P.
• Data de Publicação: 2018
• Outros Autores: GUEDES, M. C., BATISTA, A. P. B., SILVA, D. A. S. da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091206; https://doi.org/10.3390/f9020054
• topic: Pracuúba; Regeneração florestal; Forest dynamics; Lowland forest; Dinâmica florestal; Floresta de baixa altitude; Árvore Florestal; Produto Florestal; Mortalidade; Forest regeneration; Mortality

The aim of this study was to evaluate the natural regeneration dynamics of Mora paraensis in floodplain forests in three regions of the eastern Amazon, and specifically, to explore the relationship between the abundance of regenerating trees and canopy openness. Tree height and circumference of all individuals of height >50 cm and diameter at breast height (DBH) <5 cm were measured in 2012, 2013 and 2015. A matrix of transitions was created and the natural regeneration (RR), demographic and dynamic rates were calculated. Hemispherical photos were used to measure canopy openness. There was no difference in the density of regenerating trees between the three study regions (mean = 2.957 ind. ha-1). The abundance of regenerating trees was highest in 2013, when 5614 individuals were inventoried, and as such the RR 2012?2013 was positive in all three regions (mean = 7.9%). Between 2013 and 2015, the RR was negative and above 50% in all regions.Canopy openness had no significant effect on the abundance of regenerating trees. The abundance of regenerating trees of M. paraensis was high in estuarine floodplain forests of the Amazon River, but the regeneration dynamics varied between years with more favourable years alternating with periods of high mortality and negative regeneration.