Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil
Document title: Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil
Journal: Anais da Academia Brasileira de Ciencias
Database: PERIÓDICA
System number: 000409062
ISSN: 0001-3765
Authors: 1
2
2
3
2
Institutions: 1Universidade Federal Rural do Rio de Janeiro, Instituto de Florestas, Seropedica, Rio de Janeiro. Brasil
2Universidade Federal de Vicosa, Departamento de Solos, Vicosa, Minas Gerais. Brasil
3Universidade Federal de Juiz de Fora, Instituto de Ciencias Biologicas, Juiz de Fora, Minas Gerais. Brasil
Year:
Season: Jun
Volumen: 89
Number: 2
Pages: 1269-1294
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract Viruá National Park encompasses a vast and complex system of hydromorphic sandy soils covered largely by the white sand vegetation ("Campinarana") ecosystem. The purpose of this study was to investigate a vegetation gradient of "terra-firme"-white sand vegetation at the Viruá National Park. Nine plots representing three physiognomic units were installed for floristic and phytosociological surveys as well as to collect composite soil samples. The data were subjected to assessments of floristic diversity and similarity, phytosociological parameters and to statistical analyses, focused on principal components (PC) and canonical correspondence analysis (CCA). The vegetation of the Campinaranas types and Forest differed in biomass and species density. Ten species, endemic to Brazil, were particularly well-represented. PC and CCA indicated a clear distinction between the studied plots, based on measured soil variables, especially base sum and clay, which were the most differentiating properties between Campinarana and Forest; For the separation of the Campinarana types, the main distinguishing variable was organic matter content and cation exchange capacity. Higher similarity of Campinaranas was associated to a monodominant species and the lower similarity of Forest was related to the high occurrence of locally rare species
Disciplines: Biología
Keyword: Ecología,
Suelos arenosos,
Comunidades vegetales,
Composición de la comunidad,
Correlación canónica,
Especies dominantes,
Fitosociología
Keyword: Biology,
Ecology,
Sandy soils,
Plant communities,
Community composition,
Canonical correlation,
Dominant species,
Phytosociology
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