期刊
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卷 96, 期 5, 页码 281-298出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjb-2017-0162
关键词
altitude; beta-diversity; floristic similarity; natural regeneration; edaphic variables
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)/PELD-CRSC [17]
- Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Unimontes
- Vellozia Reserve
- Serra do Cipo National Park
- Serra Morena Pousada
- Pouso Pedra do Elefante
- Textile Industry Cedro
The objective of this study was to determine the species richness and abundance of the seed bank and the influence of soil attributes along an elevation gradient (800-1400 m a.s.l.). We examined the floristic similarity among areas and determined the regional diversity along this gradient in Serra do Cip6 (Minas Gerais, Brazil). A total of 1975 individuals from 149 species were germinated. Richness and abundance were not linearly related to elevation, and exhibited a threshold at 1200 m. The low degree of similarity among the areas reflects environmental heterogeneity, resulting from a rich mosaic of habitats, distinguished by the substrate configuration, continuity of vegetation, floristic composition, and proportion of exposed rock. The diversity between plots of different areas (beta) contributed to regional diversity, and species turnover was the most important factor. The physical variables and base saturation, which had high spatial heterogeneity, may be the most important factors with which to determine species turnover and p diversity. The studied seed bank is strongly influenced by edaphic variables, with a gradient of increasing acidity and proportion of fine sand, and decreasing proportion of clay and organic matter, with elevation. In addition, species richness was influenced by cation exchange capacity, organic matter, and clay; and abundance was influenced by cation exchange capacity, H + Al, organic matter, and base saturation.
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