Abstract
We investigated the spatial distribution of population data and diameter classes and modeled the diameter structure of Vouacapoua americana Aubl. (Acapu) trees in a community forest management area. A forest census of trees with diameters ≥ 33 cm was carried out in the 2015 Annual Production Unit (APU-2015). Ripley’s univariate K function and the global Moran’s index were used to describe spatial autocorrelation. Three harvest intensities (50, 70, and 80%) were simulated for the potential trees. The Weibull (3P) function provided the best performance to describe the diameter distribution of the original tree population, as well as in the harvested 50 and 70% intensities. In general, the spatial pattern of V. americana was aggregated. However, other natural factors, as population size, dynamics, geographic distribution, should be used as indicators for forest management and conservation of the specie.
Highlights
AND OBJECTIVESBrazil stands out on the world stage for having extensive native forest areas, protecting an expressive fraction of fungi and plants of the world diversity (Forzza et al, 2010)
We investigated the spatial distribution of population data and diameter classes and modeled the diameter structure of Vouacapoua americana Aubl. (Acapu) trees in a community forest management area
The census had been performed in the 2015 Annual Production Unit1 (APU-2015), which has a total area of 545.27 ha and is subdivided into six forest management units2 (FMUs; Figure 1)
Summary
AND OBJECTIVESBrazil stands out on the world stage for having extensive native forest areas, protecting an expressive fraction of fungi and plants (between 9.5 and 9.9%) of the world diversity (Forzza et al, 2010). With 18,932 endemic species, Brazil has one of the highest rates of endemism on the planet (46.2%) (Forzza et al, 2010). The Amazon biome has gained notoriety for harboring 13,375 documented species, of which 2,046 (15.4%) are endemic (Forzza et al, 2012). The accelerated destruction and fragmentation of habitats threatens the rich biodiversity of Brazilian plant species. In regards to the Brazilian Amazon, Martinelli & Moraes (2013) estimated that 87 endangered species, 90 species with insufficient data, and 142 least concern species were of interest to conservation and research. Feeley & Silman (2009) estimated that, by 2050, 5–9% of Amazon plant species will have gone extinct and that their habitat will have been reduced by 12–24% In regards to the Brazilian Amazon, Martinelli & Moraes (2013) estimated that 87 endangered species, 90 species with insufficient data, and 142 least concern species were of interest to conservation and research. Feeley & Silman (2009) estimated that, by 2050, 5–9% of Amazon plant species will have gone extinct and that their habitat will have been reduced by 12–24%
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