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Plant Ecology

, Volume 189, Issue 2, pp 187–200 | Cite as

Relationships between tree component structure, topography and soils of a riverside forest, Rio Botucaraí, Southern Brazil

  • Jean Carlos Budke
  • João André JarenkowEmail author
  • Ary Teixeira de Oliveira-Filho
Original Paper

Abstract

The relationships among floristic, structural and physiognomic variables of the tree component, flooding regime variations and soil fertility were investigated in a riparian forest fragment (ca. 43 ha) in the Rio Botucaraí watershed near the confluence with the Rio Jacuí, southern Brazil. All the trees with a dbh   ≥ 15 cm were surveyed in 100 contiguous 10  ×  10 m plots and soil chemical and textural variables were obtained from the analyses of 15 topsoil samples (0–20 cm depth) collected at different locations. The sample sites encompass all the topographic variation of the area. We used canonical correspondence analysis (CCA) to seek correlations between environmental variables and tree component distribution. The 1,547 surveyed individuals belonged to 30 species and 16 botanical families. The Shannon diversity index (H′) and the Pielou equability (J′) were 1.995 and 0.586 nats ind.−1, respectively. Sebastiania commersoniana, Casearia sylvestris, Eugenia uniflora and Eugenia hyemalis presented the highest importance values. Species’ densities chiefly correlated with site elevation, flooding regime and soil chemical fertility. The analyses of ecological categories (EC) revealed that most species are heliophylous and typical of early successional stages. Richness and diversity (P < 0.001) variations from different topographic positions reflect that at the local scale, flooding was a limiting factor for the establishment of certain species suggesting that local processes control species richness and diversity.

Keywords

Canonical correspondence analysis Flooding Phytogeography Riverine forest Vegetation survey 

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Notes

Acknowledgements

We are grateful to the Programa de Pós-Graduação em Botânica of Universidade Federal do Rio Grande do Sul—UFRGS, for the opportunity to undertake this study, to CAPES Scholarship Agency for the grant to the first author and to Otto Schreiner who offered his unpublished data on the physical features of the Botucaraí River basin. Our special thanks to Greice Anneter and Diogo “Bagual” Lindenmaier for their fieldwork assistance. We also appreciate the reviewing efforts of Eduardo Giehl, Ricardo Braga, Paul Wetzel (Associate Editor) and the anonymous contributors, for providing useful comments to the manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Jean Carlos Budke
    • 1
  • João André Jarenkow
    • 2
    Email author
  • Ary Teixeira de Oliveira-Filho
    • 3
  1. 1.Programa de Pós-Graduação em BotânicaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  2. 2.Departamento de BotânicaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  3. 3.Departamento de Ciências FlorestaisUniversidade Federal de LavrasLavrasBrazil

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