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| Boeger,Maria Regina Torres; Silva,Maiara Matilde; Nogueira,Guilherme; Alvarenga,Allan; Pereto,Suellen Silva. |
| ABSTRACT In ombrophilous forests, light stratification provokes different adjustments by plants for better use of the environmental conditions of each stratum. Among the morphological traits that vary with strata, the presence of bundle sheath extensions (BSEs) is related to water transport, photosynthesis, and leaf mechanical support and classifies leaves as homobaric or heterobaric. This study analyzed the proportion of these types of leaves in a Lowland Ombrophilous Dense Forest (LLODF) and a Mixed Ombrophilous Forest (MOF), and among the strata of each forest type. The morphological leaf traits of 89 LLODF tree species and 57 MOF tree species were examined. The proportion of homobaric and heterobaric leaves did not differ between forests. However, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bundle sheath extension; Leaf morphological traits; Light stratification; Lowland Ombrophilous Dense Forest; Mixed Ombrophilous Forest. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200304 |
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| Mallmann,Ivanete Teresinha; Silva,Vinícius Leão da; Schmitt,Jairo Lizandro. |
| Abstract: The Araucaria Forest is a unique plant formation, practically restricted to the Atlantic Forest biome, in the South and Southeast of Brazil. It is immensely fragmented and its area is reduced to a minimum fraction, from 13 to 2% of the original area, due to intense anthropic exploitation. Our study evaluated the richness and floristic composition of ferns and lycophytes within three Araucaria forest fragments, in Rio Grande do Sul, Brazil. For the floristic inventory, a parcel of 1 ha (100x100m) was demarcated inside three fragments, which were classified by size: large (246 ha - H1LF), medium (57 ha - H2MF) and small (5.2 ha - H3SF). Occurring species life forms and preferential substrates up to 4 meters above ground were recorded. In total, 55... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mixed Ombrophilous Forest; Fragmentation; Seedless vascular plants; Floristic inventory. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400302 |
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