Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil

The aim of this study was to describe the floristic, structure and spatial pattern of species occurring in a natural fragment of the floodplain forest in the lower Tapajos River, Para. Three hundred and eight contiguous sampling unities of 100 m² were installed, comprising a sampling area of 3.08 ha...

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Autores principales:	dos Santos Vieira,Diego, Romarco de Oliveira,Marcio Leles, Vasconcelos Gama,João Ricardo, Mendonça Machado,Evandro Luiz, Bastos Görgens,Eric, Oliveira Lafetá,Bruno, Silva Garcia,Josinei
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2017
Materias:	vertical structure Ripley's K function Amazon floristic diversity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002017000200013
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spelling	oai:scielo:S0717-920020170002000132017-10-19Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazildos Santos Vieira,DiegoRomarco de Oliveira,Marcio LelesVasconcelos Gama,João RicardoMendonça Machado,Evandro LuizBastos Görgens,EricOliveira Lafetá,BrunoSilva Garcia,Josinei vertical structure Ripley's K function Amazon floristic diversity The aim of this study was to describe the floristic, structure and spatial pattern of species occurring in a natural fragment of the floodplain forest in the lower Tapajos River, Para. Three hundred and eight contiguous sampling unities of 100 m² were installed, comprising a sampling area of 3.08 ha. In each plot, all individuals with DBH (diameter at breast height of 1.30 cm) equal to or higher than 10 cm were measured, identified, and referenced in Cartesian coordinates (X, Y). The analyses of the diversity and spatial pattern were performed using the Shannon-Weaver index and the Ripley's K function, respectively. There were 1,022 individuals surveyed, including 64 tree species and 33 families. The diversity recorded was 3.03; the total density was determined to be 331.8 individuals ha-1 and basal area of 16.10 m² ha-1. The species of high ecological value were Campsiandra laurifolia, Hevea brasiliensis, Glicoxylon pedicellatum, Tetragastris altissima, Vantanea parviflora and Mabea caudata. The diametric distribution of the community and species, except for Hevea brasiliensis, behaved as expected for uneven-aged forests, and presented an exponential distribution with an inverted J form. The community spatial pattern showed variations depending on the considered distance, however there was a predominance of aggregated distribution. The spatial patterns detected on the species were: I - partially aggregated and random for Vantanea parviflora species, II - completely aggregated to the Hevea brasiliensis and Glicoxylon pedicellatum species, and III -predominantly aggregated to Campsiandra laurifolia, Tetragastris altissima and Mabea caudata.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.38 n.2 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002017000200013en10.4067/S0717-92002017000200013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	vertical structure Ripley's K function Amazon floristic diversity
spellingShingle	vertical structure Ripley's K function Amazon floristic diversity dos Santos Vieira,Diego Romarco de Oliveira,Marcio Leles Vasconcelos Gama,João Ricardo Mendonça Machado,Evandro Luiz Bastos Görgens,Eric Oliveira Lafetá,Bruno Silva Garcia,Josinei Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil
description	The aim of this study was to describe the floristic, structure and spatial pattern of species occurring in a natural fragment of the floodplain forest in the lower Tapajos River, Para. Three hundred and eight contiguous sampling unities of 100 m² were installed, comprising a sampling area of 3.08 ha. In each plot, all individuals with DBH (diameter at breast height of 1.30 cm) equal to or higher than 10 cm were measured, identified, and referenced in Cartesian coordinates (X, Y). The analyses of the diversity and spatial pattern were performed using the Shannon-Weaver index and the Ripley's K function, respectively. There were 1,022 individuals surveyed, including 64 tree species and 33 families. The diversity recorded was 3.03; the total density was determined to be 331.8 individuals ha-1 and basal area of 16.10 m² ha-1. The species of high ecological value were Campsiandra laurifolia, Hevea brasiliensis, Glicoxylon pedicellatum, Tetragastris altissima, Vantanea parviflora and Mabea caudata. The diametric distribution of the community and species, except for Hevea brasiliensis, behaved as expected for uneven-aged forests, and presented an exponential distribution with an inverted J form. The community spatial pattern showed variations depending on the considered distance, however there was a predominance of aggregated distribution. The spatial patterns detected on the species were: I - partially aggregated and random for Vantanea parviflora species, II - completely aggregated to the Hevea brasiliensis and Glicoxylon pedicellatum species, and III -predominantly aggregated to Campsiandra laurifolia, Tetragastris altissima and Mabea caudata.
author	dos Santos Vieira,Diego Romarco de Oliveira,Marcio Leles Vasconcelos Gama,João Ricardo Mendonça Machado,Evandro Luiz Bastos Görgens,Eric Oliveira Lafetá,Bruno Silva Garcia,Josinei
author_facet	dos Santos Vieira,Diego Romarco de Oliveira,Marcio Leles Vasconcelos Gama,João Ricardo Mendonça Machado,Evandro Luiz Bastos Görgens,Eric Oliveira Lafetá,Bruno Silva Garcia,Josinei
author_sort	dos Santos Vieira,Diego
title	Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil
title_short	Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil
title_full	Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil
title_fullStr	Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil
title_full_unstemmed	Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil
title_sort	phytosociology of a natural fragment of the floodplain forest in the lower tapajós river, brazil
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002017000200013
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Phytosociology of a natural fragment of the floodplain forest in the Lower Tapajós River, Brazil

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