Distribution and structure of woody species in an ecotonal restinga on the Amazon coast of Maranhão state, Brazil
Background and aims: Restingas vegetation is an ecosystem that extends along the coast of Brazil in several extensions, with phytophysiognomies composed of strata varying from herbaceous to arboreal The objective of this work was to analyze the structural arrangement, the diversity and distribution...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Artículo revista |
| Lenguaje: | Español |
| Publicado: |
Sociedad Argentina de Botánica
2021
|
| Materias: | |
| Acceso en línea: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/32900 |
| Aporte de: |
| Sumario: | Background and aims: Restingas vegetation is an ecosystem that extends along the coast of Brazil in several extensions, with phytophysiognomies composed of strata varying from herbaceous to arboreal The objective of this work was to analyze the structural arrangement, the diversity and distribution of the woody community of an ecotonal restinga on the coast of Maranhão, northeastern Brazil, with a view to research aimed at the bioprospecting potential of species.
M&M: For sampling the vegetation, the method of points-quadrants (50 points) was used, whose inclusion criteria was Perimeter at Ground Height ≥ 10cm. Phytosociological parameters, community structure and phytogeographic distribution pattern were analyzed.
Results: The sampling resulted in 22 species, 18 genera and 14 families. The most representative families were Myrtaceae (with four species), Arecaceae, Fabaceae, Ochnaceae, Polygonaceae e Rubiaceae (with two species, each). The species with the highest Importance Values (IV) were Astrocaryum vulgare (20,36%), Attalea speciosa (19,40%), Himatanthus drasticus (14,72%), Chamaecrista ramosa (10,68%), and Eugenia biflora (10,27%). The Shannon's diversity index was 2,401 nat.ind-1 and Pielou’s equality was 0,749. The pattern of local distribution showed that the species are randomly distributed. The only species with a different distribution pattern was Chamaecrista ramosa, with an aggregated distribution.
Conclusions: The structure and dynamics of the ecotonal restinga between the Amazon and Northeastern coastlines indicate that the area has richness and diversity of species with values similar to the restingas of the northeast, highlighting the need for protection and valuation of plants in restinga areas. |
|---|