Floristic and phytosociology in dense "terra firme" rainforest in the Belo Monte Hydroelectric Plant influence area, Pará, Brazil

• Published in: Brazilian journal of biology Vol. 75; no. 3 Suppl 1; pp. 257 - 276
• Main Authors: Lemos, D A N, Ferreira, B G A, Siqueira, J D P, Oliveira, M M, Ferreira, A M
• Format: Journal Article
• Language: English
• Published: Brazil Instituto Internacional de Ecologia 01-08-2015
• Subjects: amazon species; Biodiversity; BIOLOGY; Brazil; diversity; floristic survey; Plant Dispersal; Power Plants; rain forest; Rainforest; Trees - physiology; Brazil; Palavra-chave: levantamento florístico; diversity; diversidade; floresta tropical; espécies amazônicas; floristic survey; rain forest; amazon species
• ISSN: 1519-6984; 1678-4375; 1678-4375; 1519-6984
• DOI: 10.1590/1519-6984.01814BM

The objective of the present study was to characterise the floristic and phytosociological composition on a stretch of dense "Terra Firme" rainforest located in the Belo Monte hydroelectric plant area of influence, located in the state of Pará, Brazil. All trees with DAP >10 cm situated in 75 permanent plots of 1 ha were inventoried. 27,126 individuals trees (361 ind.ha-1), distributed in 59 botanical families, comprising 481 species were observed. The families with the largest number of species were Fabaceae (94), Araceae (65) and Arecaceae (43), comprising 43.7% of total species. The species Alexa grandiflora (4.41), Cenostigma tocantinum (2.50) and Bertholletia excelsa (2.28) showed the highest importance values (IV). The ten species with greater IV are concentrated (22%). The forest community has high species richness and can be classified as diverse age trees, heterogeneous and of medium conservation condition.