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Growth and survival over ten years of Brazil-nut trees planted in three anthropogenic habitats in northern Amazonia Acta Amazonica
SCOLES,Ricardo; GRIBEL,Rogério.
ABSTRACT We examined the growth and survival of Brazil-nut trees, Bertholletia excelsa (Lecythidaceae) under different environmental conditions and levels of canopy openness within experimental plantations in the Trombetas River valley, in northern Brazil. We planted 144 seedlings in three anthropogenic habitats with different levels of sunlight exposition: crop field (100% canopy opening), shrub fallow (20-80% canopy opening) and Brazil-nut forest (< 10% canopy opening). We measured plant height and diameter annually and recorded mortality and resprouting over ten years. The performance of B. excelsa differed significantly among habitats, with the highest growth rate observed at the highest level of canopy openness (crop field). Survival was highest in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bertholletia excelsa; Plantation; Light-demanding; Land restoration; Resprouting.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000100020
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A new species of Coccoloba P. Browne (Polygonaceae) from the Brazilian Amazon with exceptionally large leaves Acta Amazonica
MELO,Efigenia de; FERREIRA,Carlos Alberto CID; GRIBEL,Rogério.
ABSTRACT We describe and illustrate a new species of Coccoloba (Polygonaceae), named Coccoloba gigantifolia, from the Brazilian Amazon. It resembles Coccoloba mollis Casar, but differs from the latter species by its much larger leaves in the fertile branches. The species has only been recorded in the Madeira River basin, in the states of Amazonas and Rondônia, in the central and southwestern Brazilian Amazon. The description was based on herbarium material, cultivated plants, and individual trees in their natural habitat. We provide illustrations, photographs, and an identification key with morphological characteristics that distinguish the new taxon from the other two related taxa of the Coccoloba sect. Paniculatae, as well as comments on the geographic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxonomic botany; Amazon rainforest; Geographic plant distribution; Paniculatae.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400324
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