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Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil

This study aimed to analyze relationships among the structure of the tree component, edaphic variables and canopy discontinuity along a toposequence in a seasonal upland (hillside) forest in southern Brazil. Soil and vegetation were sampled in 25 plots of 20 × 20 m each. We described the vegetation...

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Main Authors: Mélo, Máida Ariane de, Budke, Jean Carlos, Oliveira, Carlos Henke
Format: Artigo
Language: English
Published: Sociedade Botânica do Brasil 2017
Subjects:
Declive
Drenagem
Autocorrelação espacial
Solos - análise
Online Access: http://repositorio.unb.br/handle/10482/28773
https://dx.doi.org/10.1590/S0102-33062013000400015
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spelling ir-10482-287732020-11-03T19:52:59Z Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil Mélo, Máida Ariane de Budke, Jean Carlos Oliveira, Carlos Henke Declive Drenagem Autocorrelação espacial Solos - análise This study aimed to analyze relationships among the structure of the tree component, edaphic variables and canopy discontinuity along a toposequence in a seasonal upland (hillside) forest in southern Brazil. Soil and vegetation were sampled in 25 plots of 20 × 20 m each. We described the vegetation in terms of structure, richness and diversity, as well as by species distribution patterns. We evaluated canopy continuity, determined sloping and calculated spatial coordinates. We applied partial canonical correspondence analysis (pCCA) to determine whether species distribution correlated with environmental and spatial variables. We identified 1201 individuals belonging to 76 species within 30 families. The species with highest density and frequency were Gymnanthes concolor Spreng., Calyptranthes tricona D.Legrand, Eugenia moraviana O.Berg and Trichilia claussenii DC. The pCCAs indicated significant correlations with environmental and spatial variables. Sand content, boron content and soil density collectively explained 36.17% of the species matrix variation (total inertia), whereas the spatial variables x, y and xy² collectively explained 14.27%. The interaction between environmental and spatial variables explained nearly 4.5%. However, 45.05% remained unexplained, attributed to stochastic variation or unmeasured variables. Terrain morphology and canopy discontinuity had no apparent influence on richness, and changes in species distribution were correlated with sloping, which affects soil features and determines the directional distribution of some species. 2017-12-07T05:02:41Z 2017-12-07T05:02:41Z 2013-12 Artigo MELO, Máida Ariane de; BUDKE, Jean Carlos; HENKE-OLIVEIRA, Carlos. Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil. Acta Botanica Brasilica, Feira de Santana, v. 27, n. 4, p. 751-760, out./dez. 2013. DOI: https://doi.org/10.1590/S0102-33062013000400015. Disponível em: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400015&lng=en&tlng=en. Acesso em: 27 ago. 2020. http://repositorio.unb.br/handle/10482/28773 https://dx.doi.org/10.1590/S0102-33062013000400015 en Acesso Aberto Acta Botanica Brasilica - (CC BY-NC) - All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Fonte: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400015&lng=en&tlng=en. Acesso em: 27 ago. 2020. application/pdf Sociedade Botânica do Brasil
institution REPOSITORIO UNB
collection REPOSITORIO UNB
language English
topic Declive
Drenagem
Autocorrelação espacial
Solos - análise
spellingShingle Declive
Drenagem
Autocorrelação espacial
Solos - análise
Mélo, Máida Ariane de
Budke, Jean Carlos
Oliveira, Carlos Henke
Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil
description This study aimed to analyze relationships among the structure of the tree component, edaphic variables and canopy discontinuity along a toposequence in a seasonal upland (hillside) forest in southern Brazil. Soil and vegetation were sampled in 25 plots of 20 × 20 m each. We described the vegetation in terms of structure, richness and diversity, as well as by species distribution patterns. We evaluated canopy continuity, determined sloping and calculated spatial coordinates. We applied partial canonical correspondence analysis (pCCA) to determine whether species distribution correlated with environmental and spatial variables. We identified 1201 individuals belonging to 76 species within 30 families. The species with highest density and frequency were Gymnanthes concolor Spreng., Calyptranthes tricona D.Legrand, Eugenia moraviana O.Berg and Trichilia claussenii DC. The pCCAs indicated significant correlations with environmental and spatial variables. Sand content, boron content and soil density collectively explained 36.17% of the species matrix variation (total inertia), whereas the spatial variables x, y and xy² collectively explained 14.27%. The interaction between environmental and spatial variables explained nearly 4.5%. However, 45.05% remained unexplained, attributed to stochastic variation or unmeasured variables. Terrain morphology and canopy discontinuity had no apparent influence on richness, and changes in species distribution were correlated with sloping, which affects soil features and determines the directional distribution of some species.
format Artigo
author Mélo, Máida Ariane de
Budke, Jean Carlos
Oliveira, Carlos Henke
author_sort Mélo, Máida Ariane de
title Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil
title_short Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil
title_full Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil
title_fullStr Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil
title_full_unstemmed Relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper Uruguay River valley, Brazil
title_sort relationships between structure of the tree component and environmental variables in a subtropical seasonal forest in the upper uruguay river valley, brazil
publisher Sociedade Botânica do Brasil
publishDate 2017
url http://repositorio.unb.br/handle/10482/28773
https://dx.doi.org/10.1590/S0102-33062013000400015
_version_ 1682612148068417536
score 13.657419

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