Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/18123
Título: Floristic composition and similarity of 15 hectares in central Amazon, Brazil
Autor: Silva, Kátia Emídio da
Martins, Sebastiäo Venâncio
Ribeiro, Carlos Antoˆnio Álvares Soares
Santos, Nerilson Terra
Azevedo, Celso Paulo de
Matos, Francisca Dionízia de Almeida
Amaral, Iêda Leão do
Palavras-chave: Biodiversity
Biomass
Classification
Comparative Study
Environmental Monitoring
Species Difference
Tree
Tropic Climate
Biodiversity
Biomass
Environmental Monitoring
Species Specificity
Trees
Tropical Climate
Burseraceae
Eschweilera
Eschweilera Coriacea
Fabaceae
Lauraceae
Lecythidaceae
Licania
Mimosoideae
Naucleopsis Caloneura
Ocotea
Papilionoideae
Pouteria
Protium Hebetatum
Psidium
Psidium Guineense
Sapotaceae
Scleronema Micranthum
Data do documento: 2011
Revista: Revista de Biologia Tropical
É parte de: Volume 59, Número 4, Pags. 1927-1938
Abstract: The Amazon region is one of the most diverse areas in the world. Research on high tropical forest diversity brings up relevant contributions to understand the mechanisms that result and support such diversity. In the present study we describe the species composition and diversity of 15 one-ha plots in the Amazonian terra firme dense forest in Brazil, and compare the floristic similarity of these plots with other nine one-ha plots. The 15 plots studied were randomly selected from permanent plots at the Embrapa Experimental site, Amazonas State in 2005. The diversity was analysed by using species richness and Shannon's index, and by applying the orensen's index for similarity and unweighted pair-group average (UPGMA) as clustering method. Mantel test was performed to study whether the differences in species composition between sites could be xplained by the geographic distance between them. Overall, we identified 8 771 individuals, 264 species and 51 plant families. Most of the species were concentrated in few families and few had large number of individuals. Families presenting the highest species richness were Fabaceae (Faboideae: 22spp., Mimosoideae: 22spp.), Sapotaceae: 22spp., Lecythidaceae: 15 and Lauraceae: 13. Burseraceae had the largest number of individuals with 11.8% of the total. The ten most abundant species were: Protium hebetatum (1 037 individuals), Eschweilera coriacea (471), Licania oblongifolia (310), Pouteria minima (293), Ocotea cernua (258), Scleronema micranthum (197), Eschweilera collina (176), Licania apelata (172), Naucleopsis caloneura (170) and Psidium araca (152), which represented 36.5% of all individuals. Approximately 49% of species had up to ten individuals and 13% appeared only once in all sampled plots, showing a large occurrence of rare species. Our study area is on a forest presenting a high tree species diversity with Shannon's diversity index of 4.49. The dendrogram showed two groups of plots with low similarity between them (less than 0.25), and the closer the plots were one to another, more similar in species composition (Mantel R=0.3627, p<0.01). The 15 plots in our study area share more than 50% of their species composition and represent the group of plots that have the shortest distance between each other. Overall, our results highlight the high local and regional heterogeneity of environments in terra firme forests, and the high occurrence of rare species, which should be considered in management and conservation programs in the Amazon rainforest, in order to maintain its structure on the long run.
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