Phytossociology in Floodplain Forest of the Amazon River Estuary in the Amapa State
Keywords:
Horizontal structure, vertical structure, forestry dynamicAbstract
The present study was developed aiming to evaluate the variations in the structure and the dynamics of Amazonian estuarine floodplain forest, in three places (Bailique, Igarapé Fortaleza eandAracu River) along the north arm of the Amazon River, in two measurements. The samples were installed in areas of forest that had a good state of repair. In 2001/02 three permanent sample plots were installed with size of 100 m x 100 m, divided in ten sub-plots with 20 m x 50 m, and in 2006/07 a new measurement was done to evaluate the changes, with minimum inclusion CAP of 15 cm. The families number remained the same in the Bailique (20), in the igarapé Fortaleza (26) and had reduction in the Aracu river from 27 to 25 families; the species number reduced in the three places: 39 for 37, 49 for 48 and 50 for 47; the absolute density (trees per hectare) increased in the Bailique (17),reduced in the Aracu river (50) and in the igarapé Fortaleza (151); the basal area (m2/ha) increased in the Bailique (1.97), in Aracu river (2.90) and reduced in the igarapé Fortaleza (5,64); the mixture quotient of Jentsch remained the same in the Aracu river (01:18), reduced in the Bailique (01:19 from 01:20) and increased in the igarapé Fortaleza (01:21 for 01:18); the biggest ingrowth occurred in the Bailique, with 31 açaí (Euterpe oleracea Mart.); the biggest reductions occurred with the death of 33 murumuru (Astrocaryum murumuru Mart.) in the Aracuriver and 46 E. oleracea in the igarapé Fortaleza; the species of better sociological position in the forest was E.oleracea.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
The BRAZILIAN JOURNAL OF FORESTRY RESEARCH reserves the right to correct grammar, improve clarity, and impose PFB standard although respecting the author's style.
Final proof version will be sent to the correspondence author.
Published papers will become property of the BRAZILIAN JOURNAL OF FORESTRY RESEARCH.
Published papers may be used by the authors, without previous PFB authorization, allowed when source is cited.
Any mention of trademarks or methods do not imply in its recommended by the Editorial Committee.
The authors are the exclusive responsible for opinions and concepts developed in the manuscript.