High tree alpha-diversity in Amazonian Ecuador |
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Authors: | Renato Valencia Henrik Balslev Guillermo Paz Y Miño C |
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Affiliation: | (1) Department of Systematic Botany Herbarium, Aarhus University, Building 137, DK-800 Aarhus, Denmark;(2) Departamento de Biología, Herbario QCA, P. Universidad Católica del Ecuador, Apartado 17-01-2184, Quito, Ecuador |
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Abstract: | In a 1 ha square plot of terra firme forest at 260 m elevation in Amazonian Ecuador, all trees with diameter at breast height (dbh) 5 cm were studied. There were 1561 individuals, 473 species, 187 genera and 54 families. Of these, 693 individuals, 307 species, 138 genera and 46 families had a dbh 10 cm. This is the highest number of tree species ever recorded for a tropical rain forest sample of this size. In both dbh classes, the most species-rich families were: Fabaceae sensu lato (including Mimosaceae and Caesalpiniaceae), Lauraceae and Sapotaceae; the most species-rich genera, were Pouteria, Inga and Protium. The vertical space was partitioned among species: 166 species were found only in the 5–10 dbh cm class and were mostly sub-canopy treelets, and 307 species with dbh 10 cm were mostly large canopy trees. |
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Keywords: | Tree alpha-diversity Amazonia terra firme |
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