occurrence of homobaric and heterobaric leaves in two forest types of southern brazil
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ID: 218540
2016
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Abstract
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 both forest types, the distribution of species with heterobaric or homobaric leaves depended on strata, with heterobaric species occurring mainly in higher strata, and homobaric species in lower strata. Thus, light stratification acts as an ecological filter on the composition of the vegetation of these forests, favoring heterobaric species in places with higher light intensity and temperature, such as the highest strata of canopy. On the other hand, homobaric species are more frequent in lower strata, where light is less available and humidity higher.
| Reference Key |
boeger2016actaoccurrence
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|---|---|
| Authors | ;Maria Regina Torres Boeger;Maiara Matilde Silva;Guilherme Nogueira;Allan Alvarenga;Suellen Silva Pereto |
| Journal | monatshefte für chemie chemical monthly |
| Year | 2016 |
| DOI |
10.1590/0102-33062016abb0064
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| URL | |
| Keywords | Keywords not found |
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